Pub Date : 2020-10-19DOI: 10.1080/1943815X.2020.1825228
Sally A. Wilson, R. Scholes
ABSTRACT The African woodlands known as miombo are one of the world’s largest currently relatively unexploited, but potentially arable, land resources. Miombo landscapes one of the top contemporary locations of conversion of dry forests to crop agriculture. This study investigates the net effect on climate forcing that results from different types of land use change in miombo, taking into account the multiple mechanisms through which the land interacts with the climate system, locally and globally. It finds that when miombo is converted tointensively cultivated commercial crops, the landscape-averaged 30-year net greenhouse gas forcing relative to intact woodlands is 309gCO2e m-2 y-1, of which net emission of carbon dioxide amount to 66%, non-CO2 greenhouse gas effects to 33%, plus unquantified contributions from ozone precursors and aerosols. We find that net brightening of the land surface resulting from clearing the woodlands generates a cooling effect larger than the greenhouse gas forcing (-1139gCO2e m-2 y-1). Greenhouse gas forcings resulting from transformation to extensive subsistence agriculture that are 78% lower than those from the intensive commercial agriculture path, and 40% lower if a transformation which sets out to mimic ecological processes in the miombo landscape is undertaken. Once the effect of surface brightening is included, then the total forcing for extensive subsistence agriculture is -834gCO2e m-2 y-1 , about the same as intensive commercial, and eco-agriculture is -102gCO2e m-2 y-1 . Taking into account the account the larger areas required for to achieve the same production, intensive commercial agriculture is the more climate-protective option.Keywords: greenhouse gas, net radiation, deforestation.
{"title":"The climate impact of land use change in the miombo region of south central Africa","authors":"Sally A. Wilson, R. Scholes","doi":"10.1080/1943815X.2020.1825228","DOIUrl":"https://doi.org/10.1080/1943815X.2020.1825228","url":null,"abstract":"ABSTRACT The African woodlands known as miombo are one of the world’s largest currently relatively unexploited, but potentially arable, land resources. Miombo landscapes one of the top contemporary locations of conversion of dry forests to crop agriculture. This study investigates the net effect on climate forcing that results from different types of land use change in miombo, taking into account the multiple mechanisms through which the land interacts with the climate system, locally and globally. It finds that when miombo is converted tointensively cultivated commercial crops, the landscape-averaged 30-year net greenhouse gas forcing relative to intact woodlands is 309gCO2e m-2 y-1, of which net emission of carbon dioxide amount to 66%, non-CO2 greenhouse gas effects to 33%, plus unquantified contributions from ozone precursors and aerosols. We find that net brightening of the land surface resulting from clearing the woodlands generates a cooling effect larger than the greenhouse gas forcing (-1139gCO2e m-2 y-1). Greenhouse gas forcings resulting from transformation to extensive subsistence agriculture that are 78% lower than those from the intensive commercial agriculture path, and 40% lower if a transformation which sets out to mimic ecological processes in the miombo landscape is undertaken. Once the effect of surface brightening is included, then the total forcing for extensive subsistence agriculture is -834gCO2e m-2 y-1 , about the same as intensive commercial, and eco-agriculture is -102gCO2e m-2 y-1 . Taking into account the account the larger areas required for to achieve the same production, intensive commercial agriculture is the more climate-protective option.Keywords: greenhouse gas, net radiation, deforestation.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"40 1","pages":"187 - 203"},"PeriodicalIF":2.4,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88178361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-08DOI: 10.1080/1943815X.2020.1823421
Junliang Zou, B. Osborne
ABSTRACT Soil fluxes of nitrous oxide (N2O) play an important role in the global greenhouse gas budget. However, the response of soil N2O emissions to climate change in temperate forest plantations is not yet well understood. In this study, we assessed the responses of soil N2O fluxes to experimental warming with or without water addition, using a replicated in situ heating (~2°C above ambient) and water addition (170 mm) experiment in a temperate Sitka spruce plantation forest over the period 2014–2016. We found that seasonal fluxes of N2O during the year were highly variable, ranging from net uptake to net emissions. Seasonal variations in soil N2O fluxes were not correlated with either soil temperature or soil moisture. In addition, none of the individual warming/watering treatments, or their interactions, had significant effects on soil N2O fluxes and N-related soil properties. Overall, our results suggest that despite future increases in temperature, soil N2O emission may remain largely unchanged in many temperate forest ecosystems that are often N-limited.
{"title":"No effect of warming and watering on soil nitrous oxide fluxes in a temperate sitka spruce forest ecosystem","authors":"Junliang Zou, B. Osborne","doi":"10.1080/1943815X.2020.1823421","DOIUrl":"https://doi.org/10.1080/1943815X.2020.1823421","url":null,"abstract":"ABSTRACT Soil fluxes of nitrous oxide (N2O) play an important role in the global greenhouse gas budget. However, the response of soil N2O emissions to climate change in temperate forest plantations is not yet well understood. In this study, we assessed the responses of soil N2O fluxes to experimental warming with or without water addition, using a replicated in situ heating (~2°C above ambient) and water addition (170 mm) experiment in a temperate Sitka spruce plantation forest over the period 2014–2016. We found that seasonal fluxes of N2O during the year were highly variable, ranging from net uptake to net emissions. Seasonal variations in soil N2O fluxes were not correlated with either soil temperature or soil moisture. In addition, none of the individual warming/watering treatments, or their interactions, had significant effects on soil N2O fluxes and N-related soil properties. Overall, our results suggest that despite future increases in temperature, soil N2O emission may remain largely unchanged in many temperate forest ecosystems that are often N-limited.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"29 1","pages":"83 - 96"},"PeriodicalIF":2.4,"publicationDate":"2020-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79633842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-25DOI: 10.1080/1943815X.2020.1789666
R. Howarth
ABSTRACT In 2019, New York State passed aggressive new climate legislation to reduce greenhouse gas (GHG) emissions and laid out major changes for how emissions are reported. One change is the inclusion of emissions from outside of the boundaries of the State if they are associated with energy use within NY; the traditional inventory considered emissions only within the State. The new legislation also mandated that methane emissions be compared with carbon dioxide over a 20-year time frame rather than the 100-year time frame previously used by NY and still used by virtually all other governments globally. This reflected the desire of NY's policymakers for a tool that evaluates emissions from the standpoint of energy consumption and that more heavily weighs the role of methane as an agent of warming over the next few decades. This paper compares emissions based on the new approach for GHG reporting with the traditional inventory. The traditional inventory is driven almost entirely by carbon dioxide emissions. As of 2015, these carbon dioxide emissions had declined by 15% since 1990 due to an 88% decrease in coal consumption and a 27% decrease in consumption of petroleum products, although consumption of natural gas had increased by 57%. Methane emissions increased by almost 30% between 1990 and 2015, largely due to the increased consumption of natural gas. According to the new GHG reporting rules, methane contributed 28% of all fossil-fuel emissions in 1990 and 37% in 2015. Total GHG emissions remained virtually unchanged from 1990 to 2015.
{"title":"Methane emissions from fossil fuels: exploring recent changes in greenhouse-gas reporting requirements for the State of New York","authors":"R. Howarth","doi":"10.1080/1943815X.2020.1789666","DOIUrl":"https://doi.org/10.1080/1943815X.2020.1789666","url":null,"abstract":"ABSTRACT In 2019, New York State passed aggressive new climate legislation to reduce greenhouse gas (GHG) emissions and laid out major changes for how emissions are reported. One change is the inclusion of emissions from outside of the boundaries of the State if they are associated with energy use within NY; the traditional inventory considered emissions only within the State. The new legislation also mandated that methane emissions be compared with carbon dioxide over a 20-year time frame rather than the 100-year time frame previously used by NY and still used by virtually all other governments globally. This reflected the desire of NY's policymakers for a tool that evaluates emissions from the standpoint of energy consumption and that more heavily weighs the role of methane as an agent of warming over the next few decades. This paper compares emissions based on the new approach for GHG reporting with the traditional inventory. The traditional inventory is driven almost entirely by carbon dioxide emissions. As of 2015, these carbon dioxide emissions had declined by 15% since 1990 due to an 88% decrease in coal consumption and a 27% decrease in consumption of petroleum products, although consumption of natural gas had increased by 57%. Methane emissions increased by almost 30% between 1990 and 2015, largely due to the increased consumption of natural gas. According to the new GHG reporting rules, methane contributed 28% of all fossil-fuel emissions in 1990 and 37% in 2015. Total GHG emissions remained virtually unchanged from 1990 to 2015.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"108 1","pages":"69 - 81"},"PeriodicalIF":2.4,"publicationDate":"2020-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90786620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-20DOI: 10.1080/1943815X.2020.1779092
L. Verchot, M. Dannenmann, S. K. Kengdo, C. B. Njine-Bememba, M. Rufino, D. Sonwa, J. Tejedor
ABSTRACT Deforestation and land-use change are accelerating in the Congo Basin and elsewhere in the tropics affecting the soil-atmosphere exchange of greenhouse gases (GHG). There is a lack of data from Central Africa. We quantified fluxes of CO2, CH4, and N2O at the soil-atmosphere interface in a secondary forest, a cocoa agroforest, and an unfertilized cropland. Soil respiration was highest in the secondary forest (15.37 ± 3.42 Mg C ha−1 y−1), intermediate in the cacao agroforest (12.26 ± 2.91 Mg C ha−1 y−1) and the lowest in the unfertilized cropland (8.74 ± 2.62 Mg C ha−1 y−1). Likewise, N2O fluxes were highest in the secondary forest (2.17 ± 0.20 kg N ha−1 y−1), intermediate in the cacao agroforest (1.40 ± 0.08 kg N ha−1 y−1) and lowest in the unfertilized cropland (1.04 ± 0.15 kg N ha−1 y−1). Soils were a sink for atmospheric CH4 and sink strength was high in the secondary forest (−3.60 ± 1.83 kg CH4 ha−1 y−1) and cacao agroforest (−3.61 ± 2.09 kg CH4 ha−1 y−1) and low in the unfertilized cropland (−1.9 ± 1.59 kg CH4 ha−1 y−1). Variation in soil water content rather than temperature was the dominant driver of seasonal variations of the fluxes at all study sites and N availability affected both N2O and CH4 fluxes. Our results suggest that tropical land-use change is decreasing soil respiration, decreasing the strength of the soil CH4 sink and decreasing N2O emissions, in landscapes that do not practice agriculture with chemical fertilization.
在刚果盆地和其他热带地区，森林砍伐和土地利用变化正在加速，影响着温室气体(GHG)的土壤-大气交换。缺乏来自中非的数据。我们量化通量的二氧化碳、甲烷和一氧化二氮在土壤空气界面次生林,可可agroforest,土地不肥沃的农田。次生林土壤呼吸最高(15.37±3.42 Mg C ha−1 y−1)，可可混交林中等(12.26±2.91 Mg C ha−1 y−1)，未施肥农田最低(8.74±2.62 Mg C ha−1 y−1)。同样，N2O通量在次生林中最高(2.17±0.20 kg N ha−1 y−1)，在可可混交林中居中(1.40±0.08 kg N ha−1 y−1)，在未施肥的农田中最低(1.04±0.15 kg N ha−1 y−1)。土壤是大气CH4的汇，其汇强度在次生林(- 3.60±1.83 kg CH4 ha−1 y−1)和可可混交林(- 3.61±2.09 kg CH4 ha−1 y−1)中较高，在未施肥的农田中较低(- 1.9±1.59 kg CH4 ha−1 y−1)。土壤含水量的变化是影响N2O和CH4通量季节变化的主要因素，而不是温度的变化，氮有效性影响N2O和CH4通量。研究结果表明，在不施用化学肥料的热带土地利用变化会降低土壤呼吸、降低土壤CH4汇强度和减少N2O排放。
{"title":"Land-use change and Biogeochemical controls of soil CO2, N2O and CH4 fluxes in Cameroonian forest landscapes","authors":"L. Verchot, M. Dannenmann, S. K. Kengdo, C. B. Njine-Bememba, M. Rufino, D. Sonwa, J. Tejedor","doi":"10.1080/1943815X.2020.1779092","DOIUrl":"https://doi.org/10.1080/1943815X.2020.1779092","url":null,"abstract":"ABSTRACT Deforestation and land-use change are accelerating in the Congo Basin and elsewhere in the tropics affecting the soil-atmosphere exchange of greenhouse gases (GHG). There is a lack of data from Central Africa. We quantified fluxes of CO2, CH4, and N2O at the soil-atmosphere interface in a secondary forest, a cocoa agroforest, and an unfertilized cropland. Soil respiration was highest in the secondary forest (15.37 ± 3.42 Mg C ha−1 y−1), intermediate in the cacao agroforest (12.26 ± 2.91 Mg C ha−1 y−1) and the lowest in the unfertilized cropland (8.74 ± 2.62 Mg C ha−1 y−1). Likewise, N2O fluxes were highest in the secondary forest (2.17 ± 0.20 kg N ha−1 y−1), intermediate in the cacao agroforest (1.40 ± 0.08 kg N ha−1 y−1) and lowest in the unfertilized cropland (1.04 ± 0.15 kg N ha−1 y−1). Soils were a sink for atmospheric CH4 and sink strength was high in the secondary forest (−3.60 ± 1.83 kg CH4 ha−1 y−1) and cacao agroforest (−3.61 ± 2.09 kg CH4 ha−1 y−1) and low in the unfertilized cropland (−1.9 ± 1.59 kg CH4 ha−1 y−1). Variation in soil water content rather than temperature was the dominant driver of seasonal variations of the fluxes at all study sites and N availability affected both N2O and CH4 fluxes. Our results suggest that tropical land-use change is decreasing soil respiration, decreasing the strength of the soil CH4 sink and decreasing N2O emissions, in landscapes that do not practice agriculture with chemical fertilization.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"124 1","pages":"45 - 67"},"PeriodicalIF":2.4,"publicationDate":"2020-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83747279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-03DOI: 10.1080/1943815X.2020.1768550
T. Laban, P. V. van Zyl, J. Beukes, S. Mikkonen, L. Santana, M. Josipovic, V. Vakkari, A. Thompson, M. Kulmala, L. Laakso
ABSTRACT Statistical relationships between surface ozone (O3) concentration, precursor species and meteorological conditions in continental South Africa were examined from data obtained from measurement stations in north-eastern South Africa. Three multivariate statistical methods were applied in the investigation, i.e. multiple linear regression (MLR), principal component analysis (PCA) and –regression (PCR), and generalised additive model (GAM) analysis. The daily maximum 8-h moving average O3 concentrations were considered in these statistical models (dependent variable). MLR models indicated that meteorology and precursor species concentrations are able to explain ~50% of the variability in daily maximum O3 levels. MLR analysis revealed that atmospheric carbon monoxide (CO), temperature and relative humidity were the strongest factors affecting the daily O3 variability. In summer, daily O3 variances were mostly associated with relative humidity, while winter O3 levels were mostly linked to temperature and CO. PCA indicated that CO, temperature and relative humidity were not strongly collinear. GAM also identified CO, temperature and relative humidity as the strongest factors affecting the daily variation of O3. Partial residual plots found that temperature, radiation and nitrogen oxides most likely have a non-linear relationship with O3,while the relationship with relative humidity and CO is probably linear. An inter-comparison between O3 levels modelled with the three statistical models compared to measured O3 concentrations showed that the GAM model offered a slight improvement over the MLR model. These findings emphasise the critical role of regional-scale O3 precursors coupled with meteorological conditions in daily variances of O3 levels in continental South Africa.
{"title":"Statistical analysis of factors driving surface ozone variability over continental South Africa","authors":"T. Laban, P. V. van Zyl, J. Beukes, S. Mikkonen, L. Santana, M. Josipovic, V. Vakkari, A. Thompson, M. Kulmala, L. Laakso","doi":"10.1080/1943815X.2020.1768550","DOIUrl":"https://doi.org/10.1080/1943815X.2020.1768550","url":null,"abstract":"ABSTRACT Statistical relationships between surface ozone (O3) concentration, precursor species and meteorological conditions in continental South Africa were examined from data obtained from measurement stations in north-eastern South Africa. Three multivariate statistical methods were applied in the investigation, i.e. multiple linear regression (MLR), principal component analysis (PCA) and –regression (PCR), and generalised additive model (GAM) analysis. The daily maximum 8-h moving average O3 concentrations were considered in these statistical models (dependent variable). MLR models indicated that meteorology and precursor species concentrations are able to explain ~50% of the variability in daily maximum O3 levels. MLR analysis revealed that atmospheric carbon monoxide (CO), temperature and relative humidity were the strongest factors affecting the daily O3 variability. In summer, daily O3 variances were mostly associated with relative humidity, while winter O3 levels were mostly linked to temperature and CO. PCA indicated that CO, temperature and relative humidity were not strongly collinear. GAM also identified CO, temperature and relative humidity as the strongest factors affecting the daily variation of O3. Partial residual plots found that temperature, radiation and nitrogen oxides most likely have a non-linear relationship with O3,while the relationship with relative humidity and CO is probably linear. An inter-comparison between O3 levels modelled with the three statistical models compared to measured O3 concentrations showed that the GAM model offered a slight improvement over the MLR model. These findings emphasise the critical role of regional-scale O3 precursors coupled with meteorological conditions in daily variances of O3 levels in continental South Africa.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"46 1","pages":"1 - 28"},"PeriodicalIF":2.4,"publicationDate":"2020-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86976324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-04-15DOI: 10.1080/1943815x.2020.1749086
Alberto Matenhauer Urbinatti, L. L. Benites-Lazaro, C. M. Carvalho, L. Giatti
ABSTRACT In the last decade, the debate on the governance of water, energy, and food (WEF) has intensified, spurring the emergence of the term “nexus governance.” In general, the reduction of trade-offs and construction of synergies between WEF have been placed on the scientific, political, and economic agenda. However, although increasingly used, it is difficult to find a clear meaning and definition of what the term represents. Based on a systematic literature review (SLR), using text-mining and machine learning algorithms, this article investigates what are the conceptual basis of the nexus governance debate, and attempts to clarify the main themes, networks, and gaps within this literature. The analysis is based on quantitative and qualitative methods, combining social network analysis (SNA) and discourse analysis (DA). The results highlighted that twenty-four governance-related concepts support this literature, breaking down into eight groups: water and basin governance; environmental and systems governance; risk and resource security governance; economic governance; global governance; urban governance; integrative and cooperative governance; and “epistemic” and transdisciplinary governance.
{"title":"The conceptual basis of water-energy-food nexus governance: systematic literature review using network and discourse analysis","authors":"Alberto Matenhauer Urbinatti, L. L. Benites-Lazaro, C. M. Carvalho, L. Giatti","doi":"10.1080/1943815x.2020.1749086","DOIUrl":"https://doi.org/10.1080/1943815x.2020.1749086","url":null,"abstract":"ABSTRACT In the last decade, the debate on the governance of water, energy, and food (WEF) has intensified, spurring the emergence of the term “nexus governance.” In general, the reduction of trade-offs and construction of synergies between WEF have been placed on the scientific, political, and economic agenda. However, although increasingly used, it is difficult to find a clear meaning and definition of what the term represents. Based on a systematic literature review (SLR), using text-mining and machine learning algorithms, this article investigates what are the conceptual basis of the nexus governance debate, and attempts to clarify the main themes, networks, and gaps within this literature. The analysis is based on quantitative and qualitative methods, combining social network analysis (SNA) and discourse analysis (DA). The results highlighted that twenty-four governance-related concepts support this literature, breaking down into eight groups: water and basin governance; environmental and systems governance; risk and resource security governance; economic governance; global governance; urban governance; integrative and cooperative governance; and “epistemic” and transdisciplinary governance.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"50 1","pages":"21 - 43"},"PeriodicalIF":2.4,"publicationDate":"2020-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77709563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1080/1943815x.2020.1729207
R. Sarku, A. Dewulf, Erik van Slobbe, K. Termeer, G. Kranjac-Berisavljevic
ABSTRACT Farming in Ghana’s Volta delta is increasingly affected by variability in rainfall conditions and changes in land-use patterns. Under such socio-ecological conditions, little is known about farmers’ decision-making in response to uncertainties in uncertain rainfall conditions. To fill this gap and add to the literature on adaptive decision-making, we addressed the central question: what are the existing patterns of farming decision-making under uncertain rainfall conditions, and which decision-making strategies are adaptive? We developed an adaptive decision-making framework to investigate the behavior of farmers under variable rainfall conditions in Ghana’s Volta delta in the Ada East District. We conducted 5 interviews with agricultural extension agents, 44 in-depth interviews and 4 focus group discussion with farmers. Subsequently, we interviewed a sub-selection of 32 farmers. Findings of the study shows that farmers carry out different decision-making patterns in response to the variable rainfall conditions. We distinguished six strategies: three based on flexibility and three based on robustness. Flexible adaptive decision-making strategies are switching dates for sowing seeds through wait-and-see or delay strategy, muddling through the farming season with the application of various options and alternative irrigation strategies. Robust adaptive decision-making strategies are portfolio strategy of transplanting seedlings in batches, selection of robust (hardy) crops, and intercropping or diversification. Based on how farmers select strategies in response to uncertainty in rainfall conditions, we argue that some decision-making strategies are more adaptive than others. Findings of this study are relevant for the design and implementation of climate related agricultural projects.
{"title":"Adaptive decision-making under conditions of uncertainty: the case of farming in the Volta delta, Ghana","authors":"R. Sarku, A. Dewulf, Erik van Slobbe, K. Termeer, G. Kranjac-Berisavljevic","doi":"10.1080/1943815x.2020.1729207","DOIUrl":"https://doi.org/10.1080/1943815x.2020.1729207","url":null,"abstract":"ABSTRACT Farming in Ghana’s Volta delta is increasingly affected by variability in rainfall conditions and changes in land-use patterns. Under such socio-ecological conditions, little is known about farmers’ decision-making in response to uncertainties in uncertain rainfall conditions. To fill this gap and add to the literature on adaptive decision-making, we addressed the central question: what are the existing patterns of farming decision-making under uncertain rainfall conditions, and which decision-making strategies are adaptive? We developed an adaptive decision-making framework to investigate the behavior of farmers under variable rainfall conditions in Ghana’s Volta delta in the Ada East District. We conducted 5 interviews with agricultural extension agents, 44 in-depth interviews and 4 focus group discussion with farmers. Subsequently, we interviewed a sub-selection of 32 farmers. Findings of the study shows that farmers carry out different decision-making patterns in response to the variable rainfall conditions. We distinguished six strategies: three based on flexibility and three based on robustness. Flexible adaptive decision-making strategies are switching dates for sowing seeds through wait-and-see or delay strategy, muddling through the farming season with the application of various options and alternative irrigation strategies. Robust adaptive decision-making strategies are portfolio strategy of transplanting seedlings in batches, selection of robust (hardy) crops, and intercropping or diversification. Based on how farmers select strategies in response to uncertainty in rainfall conditions, we argue that some decision-making strategies are more adaptive than others. Findings of this study are relevant for the design and implementation of climate related agricultural projects.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"41 1","pages":"1 - 33"},"PeriodicalIF":2.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76250359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1080/1943815x.2020.1799826
B. F. van Heel, R. V. D. van den Born
ABSTRACT Public participation is becoming increasingly important in integrative river restoration projects. However, studies show that flood risk awareness is generally low among residents of flood-prone areas, making it (more) difficult for project managers to involve the public. We contribute to understanding this generally low flood risk perception by carrying out a survey (N = 631) among residents in a Dutch floodplain and studying the connection between flood risk perception and sense of place. We found that expected damage is influenced by (collective) memory of near-floods and that residents with a high self- and group efficacy expect less damage. Against our hypothesis, we conclude that sense of place hardly influences flood risk perception, only nature bonding does. We recommend further research to study the complex relationships between flood risk perception, sense of place and self-efficacy from a theoretical need, but also because of the implications of these results for communication in flood risk management and motivations to engage in participation processes.
{"title":"Studying residents’ flood risk perceptions and sense of place to inform public participation in a Dutch river restoration project","authors":"B. F. van Heel, R. V. D. van den Born","doi":"10.1080/1943815x.2020.1799826","DOIUrl":"https://doi.org/10.1080/1943815x.2020.1799826","url":null,"abstract":"ABSTRACT Public participation is becoming increasingly important in integrative river restoration projects. However, studies show that flood risk awareness is generally low among residents of flood-prone areas, making it (more) difficult for project managers to involve the public. We contribute to understanding this generally low flood risk perception by carrying out a survey (N = 631) among residents in a Dutch floodplain and studying the connection between flood risk perception and sense of place. We found that expected damage is influenced by (collective) memory of near-floods and that residents with a high self- and group efficacy expect less damage. Against our hypothesis, we conclude that sense of place hardly influences flood risk perception, only nature bonding does. We recommend further research to study the complex relationships between flood risk perception, sense of place and self-efficacy from a theoretical need, but also because of the implications of these results for communication in flood risk management and motivations to engage in participation processes.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"54 1","pages":"35 - 55"},"PeriodicalIF":2.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76128032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.1080/1943815x.2020.1841241
W. Winiwarter, B. Amon, Z. Bai, A. Greinert, K. Kaltenegger, Lin Ma, S. Myszograj, Markus Schneidergruber, Monika Suchowski-Kisielewicz, L. Wolf, Lin Zhang, F. Zhou
ABSTRACT Concepts of material flow and mass consistency of nitrogen compounds have been used to elucidate nitrogen’s fate in an urban environment. While reactive nitrogen commonly is associated to agriculture and hence to large areas, here we have compiled scientific literature on nitrogen budget approaches in cities, following the central role cities have in anthropogenic activities generally. This included studies that specifically dealt with individual sectors as well as budgets covering all inputs and outputs to and from a city across all sectors and media. In the available data set, a clear focus on Asian cities was noted, making full use of limited information and thus enable to quantitatively describe a local pollution situation. Time series comparisons helped to identify trends, but comparison between cities was hampered by a lack of harmonized methodologies. Some standardization, or at least improved reference to relevant standardized data collection along international norms was considered helpful. Analysis of results available pointed to the following aspects that would reveal additional benchmarks for urban nitrogen budgets: analysing the share of nitrogen that is recycled or reused, separating largely independent sets of nitrogen flows specifically between food nitrogen streams and fossil fuel combustion-related flows, and estimating the stock changes for the whole domain or within individual pools.
{"title":"Urban nitrogen budgets: flows and stock changes of potentially polluting nitrogen compounds in cities and their surroundings – a review","authors":"W. Winiwarter, B. Amon, Z. Bai, A. Greinert, K. Kaltenegger, Lin Ma, S. Myszograj, Markus Schneidergruber, Monika Suchowski-Kisielewicz, L. Wolf, Lin Zhang, F. Zhou","doi":"10.1080/1943815x.2020.1841241","DOIUrl":"https://doi.org/10.1080/1943815x.2020.1841241","url":null,"abstract":"ABSTRACT Concepts of material flow and mass consistency of nitrogen compounds have been used to elucidate nitrogen’s fate in an urban environment. While reactive nitrogen commonly is associated to agriculture and hence to large areas, here we have compiled scientific literature on nitrogen budget approaches in cities, following the central role cities have in anthropogenic activities generally. This included studies that specifically dealt with individual sectors as well as budgets covering all inputs and outputs to and from a city across all sectors and media. In the available data set, a clear focus on Asian cities was noted, making full use of limited information and thus enable to quantitatively describe a local pollution situation. Time series comparisons helped to identify trends, but comparison between cities was hampered by a lack of harmonized methodologies. Some standardization, or at least improved reference to relevant standardized data collection along international norms was considered helpful. Analysis of results available pointed to the following aspects that would reveal additional benchmarks for urban nitrogen budgets: analysing the share of nitrogen that is recycled or reused, separating largely independent sets of nitrogen flows specifically between food nitrogen streams and fossil fuel combustion-related flows, and estimating the stock changes for the whole domain or within individual pools.","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"62 1","pages":"57 - 71"},"PeriodicalIF":2.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84976481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.1080/1943815x.2020.1768551
David S Godwin, Rebecca Ferenchiak
As the primary alternative to ozone-depleting refrigerants, hydrofluorocarbons (HFCs) have increased in use and emissions in the United States. A significant increase in this use and emissions, and a large portion of total U.S. HFC consumption, is expected due to the use of HFCs in residential air conditioning (RAC). The RAC market primarily relied upon chlorodifluoromethane, a hydrochlorofluorocarbon (HCFC) commonly referred to as HCFC-22, whose consumption is being phased out globally under the Montreal Protocol on Substances that Deplete the Ozone Layer and under national regulations such as the Clean Air Act in the United States. The RAC market today relies on HFCs, most often R-410A (a blend of difluoromethane, known as HFC-32, and pentafluoroethane, known as HFC-125) for new equipment, but older units using HCFC-22 remain to be replaced. The RAC industry is investigating multiple alternatives with global warming potentials (GWPs) significantly below that of R-410A. Research has been conducted by chemical producers, air conditioner and component manufacturers, national government laboratories, academia, and consortium efforts such as the Low-GWP Alternative Refrigerants Evaluation Program administered by an industry trade organization. Various low-GWP alternatives have been suggested with GWPs of approximately 750 and below. This paper models HFC consumption in the United States and investigates industry-wide HFC reduction measures across sectors that have transitioned from ozone-depleting substances to HFCs. Under various scenarios of such measures, this paper shows that future RAC refrigerants will strongly influence industry efforts to reduce U.S. HFC consumption. RAC refrigerants with GWPs in the 150-750 range are investigated to estimate future HFC consumption levels in the United States. The transition to refrigerants with GWPs in the 150-750 range can provide significant reduction in HFC consumption in the United States. These reductions are not just reliant on manufacturers introducing new equipment with low-GWP alternatives. The service industries, responsible for repairing leaks and recovering refrigerant, play a vital role in reducing HFC consumption.
{"title":"The implications of residential air conditioning refrigerant choice on future hydrofluorocarbon consumption in the United States.","authors":"David S Godwin, Rebecca Ferenchiak","doi":"10.1080/1943815x.2020.1768551","DOIUrl":"https://doi.org/10.1080/1943815x.2020.1768551","url":null,"abstract":"<p><p>As the primary alternative to ozone-depleting refrigerants, hydrofluorocarbons (HFCs) have increased in use and emissions in the United States. A significant increase in this use and emissions, and a large portion of total U.S. HFC consumption, is expected due to the use of HFCs in residential air conditioning (RAC). The RAC market primarily relied upon chlorodifluoromethane, a hydrochlorofluorocarbon (HCFC) commonly referred to as HCFC-22, whose consumption is being phased out globally under the Montreal Protocol on Substances that Deplete the Ozone Layer and under national regulations such as the Clean Air Act in the United States. The RAC market today relies on HFCs, most often R-410A (a blend of difluoromethane, known as HFC-32, and pentafluoroethane, known as HFC-125) for new equipment, but older units using HCFC-22 remain to be replaced. The RAC industry is investigating multiple alternatives with global warming potentials (GWPs) significantly below that of R-410A. Research has been conducted by chemical producers, air conditioner and component manufacturers, national government laboratories, academia, and consortium efforts such as the Low-GWP Alternative Refrigerants Evaluation Program administered by an industry trade organization. Various low-GWP alternatives have been suggested with GWPs of approximately 750 and below. This paper models HFC consumption in the United States and investigates industry-wide HFC reduction measures across sectors that have transitioned from ozone-depleting substances to HFCs. Under various scenarios of such measures, this paper shows that future RAC refrigerants will strongly influence industry efforts to reduce U.S. HFC consumption. RAC refrigerants with GWPs in the 150-750 range are investigated to estimate future HFC consumption levels in the United States. The transition to refrigerants with GWPs in the 150-750 range can provide significant reduction in HFC consumption in the United States. These reductions are not just reliant on manufacturers introducing new equipment with low-GWP alternatives. The service industries, responsible for repairing leaks and recovering refrigerant, play a vital role in reducing HFC consumption.</p>","PeriodicalId":16194,"journal":{"name":"Journal of Integrative Environmental Sciences","volume":"17 3","pages":"29-44"},"PeriodicalIF":2.4,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/1943815x.2020.1768551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38885858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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