Luu Kim Phung, Tran Gia Han, Tran Thi Thuy An, Kim Lavane, Pankaj Kumar, N. Downes, Huỳnh Vương Thu Minh
As water scarcity puts over 80% of the world’s population at risk, water quality has become a major environmental topic. In particular, climate change has jeopardised the quality of water within the Vietnamese Mekong Delta (VMD), a key agronomic and aquaculture hub. A modest canal system and small to medium-sized reservoirs in the semi-mountain region of An Giang province contribute to a less abundant water supply and a tendency for water quality reservoirs to deteriorate. The water quality index method and descriptive technique were used in this study. The results show that in the period 2017–2020, some water quality indicators exceeded the permissible limits of the Vietnamese standards for domestic surface water in column B1 (NO3-, Total Coliform, BOD5, COD, N-NH4+) but are consistent, but are allowed for use in irrigation purposes. Findings show that for many years, WQI values in Tinh Bien and Tri Ton districts have diminished because of wastewater pollution. WQI values near the shores of O Tuk Sa Reservoir (Tinh Bien), Lo^˜i đánh máy (Tri Ton), and O Ta Soc Reservoir (Tri Ton) diminished over time. According to the WQI index, the water quality at the reservoir monitoring stations has fluctuated throughout the years, so it is advised that people implement water purification techniques for long-term well-being.
由于水资源短缺使世界上80%以上的人口处于危险之中，水质已成为一个重大的环境话题。特别是，气候变化已经危及越南湄公河三角洲(VMD)的水质，这是一个重要的农业和水产养殖中心。安江省半山区水渠系统不发达，水库规模较小，供水不足，水库水质有恶化趋势。本研究采用了水质指数法和描述法。结果表明:2017-2020年期间，部分水质指标(NO3-、总大肠菌群、BOD5、COD、N-NH4+)均超过越南生活地表水B1项标准允许范围，但基本一致，但允许用于灌溉。研究结果表明，多年来，由于废水污染，亭边和三屯地区的WQI值有所下降。O Tuk Sa水库(Tinh Bien)、Lo^ ~ i đánh máy (Tri Ton)和O Ta Soc水库(Tri Ton)海岸附近的WQI值随着时间的推移而降低。根据WQI指数，水库监测站的水质多年来一直存在波动，因此建议人们实施水净化技术，以实现长期健康。
{"title":"Potential Impacts of Climate Change on Reservoir Water Quality in An Giang Province, Vietnam","authors":"Luu Kim Phung, Tran Gia Han, Tran Thi Thuy An, Kim Lavane, Pankaj Kumar, N. Downes, Huỳnh Vương Thu Minh","doi":"10.3233/jcc230018","DOIUrl":"https://doi.org/10.3233/jcc230018","url":null,"abstract":"As water scarcity puts over 80% of the world’s population at risk, water quality has become a major environmental topic. In particular, climate change has jeopardised the quality of water within the Vietnamese Mekong Delta (VMD), a key agronomic and aquaculture hub. A modest canal system and small to medium-sized reservoirs in the semi-mountain region of An Giang province contribute to a less abundant water supply and a tendency for water quality reservoirs to deteriorate. The water quality index method and descriptive technique were used in this study. The results show that in the period 2017–2020, some water quality indicators exceeded the permissible limits of the Vietnamese standards for domestic surface water in column B1 (NO3-, Total Coliform, BOD5, COD, N-NH4+) but are consistent, but are allowed for use in irrigation purposes. Findings show that for many years, WQI values in Tinh Bien and Tri Ton districts have diminished because of wastewater pollution. WQI values near the shores of O Tuk Sa Reservoir (Tinh Bien), Lo^˜i đánh máy (Tri Ton), and O Ta Soc Reservoir (Tri Ton) diminished over time. According to the WQI index, the water quality at the reservoir monitoring stations has fluctuated throughout the years, so it is advised that people implement water purification techniques for long-term well-being.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"13 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74668447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Climate variability has significant implications for human health, necessitating a comprehensive understanding of the relationship between the two. The present study examines the trend analysis of climatic variables, and their possible impacts on health and identifies specific challenges faced by the people of Himachal Pradesh, India. The Mann-Kendall test, a non-parametric test, was used to examine temperature and rainfall trends. A survey was conducted to gauge public awareness regarding climate change and its health risks in the region. The study analysed weather patterns over 10 years, revealing fluctuating temperatures with the hottest years being 2012, 2015-17. Rainfall exhibited irregular patterns with less rainfall in 2012, 2014, 2017 and 2019. Trend analysis showed significant temperature trends in Dharamshala and Kangra. Weather-related incidents and fatalities peaked during 2012-14, while diseases, such as acute respiratory infections (ARI), asthma, cardiovascular diseases, diabetes, hypertension, and vector and water-borne diseases saw an increase over the decade. The survey results showed that the people of this region suffered mostly from respiratory problems, water-borne diseases and mental health issues. This study contributes to the existing knowledge by establishing a possible relationship between climate variability and the health of the people. Furthermore, it also provides a health database, facilitating the formulation of targeted interventions to address health-related challenges arising from the observed changes in weather patterns.
{"title":"Trend Analysis of Climatic Variables and their Possible Impact on the Health of People in Himachal Pradesh, India","authors":"Himani Narwal, Nisha Rani, Neha","doi":"10.3233/jcc230020","DOIUrl":"https://doi.org/10.3233/jcc230020","url":null,"abstract":"Climate variability has significant implications for human health, necessitating a comprehensive understanding of the relationship between the two. The present study examines the trend analysis of climatic variables, and their possible impacts on health and identifies specific challenges faced by the people of Himachal Pradesh, India. The Mann-Kendall test, a non-parametric test, was used to examine temperature and rainfall trends. A survey was conducted to gauge public awareness regarding climate change and its health risks in the region. The study analysed weather patterns over 10 years, revealing fluctuating temperatures with the hottest years being 2012, 2015-17. Rainfall exhibited irregular patterns with less rainfall in 2012, 2014, 2017 and 2019. Trend analysis showed significant temperature trends in Dharamshala and Kangra. Weather-related incidents and fatalities peaked during 2012-14, while diseases, such as acute respiratory infections (ARI), asthma, cardiovascular diseases, diabetes, hypertension, and vector and water-borne diseases saw an increase over the decade. The survey results showed that the people of this region suffered mostly from respiratory problems, water-borne diseases and mental health issues. This study contributes to the existing knowledge by establishing a possible relationship between climate variability and the health of the people. Furthermore, it also provides a health database, facilitating the formulation of targeted interventions to address health-related challenges arising from the observed changes in weather patterns.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"27 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83093666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The great acceleration is an environmental history of human-induced alterations from the historian’s perspective. It uses statistical data, descriptive examples and short introductions to support the evidence. The book is divided into four chapters: energy & population, climate and biological diversity, cities and the global economy and the Cold War influences and environmental change. The combination of themes has no obvious reason. However, the author uses them effectively to narrate their story by citing many historical incidents characterising human-dominated landscapes that changed the world. This book encourages the interaction between the anthropocene and the great acceleration that has affected not only Earth’s climate and environment but also the evolution and survival of everything else on Earth. This book makes a compelling read for architects, planners and environmental designers. Their contribution and participation in shaping the natural and built environment are less prioritised. The author seems primarily concerned with the idea of the carbon cycle and fossil fuel-driven changes in the global economy. Consequently, it provoked questions about how these disciplines influence the built environment and climate change.
{"title":"Tracing Environmental Transformations: A Study of the Anthropocene and the Great Acceleration","authors":"Kulsum Fatima","doi":"10.3233/jcc230025","DOIUrl":"https://doi.org/10.3233/jcc230025","url":null,"abstract":"The great acceleration is an environmental history of human-induced alterations from the historian’s perspective. It uses statistical data, descriptive examples and short introductions to support the evidence. The book is divided into four chapters: energy & population, climate and biological diversity, cities and the global economy and the Cold War influences and environmental change. The combination of themes has no obvious reason. However, the author uses them effectively to narrate their story by citing many historical incidents characterising human-dominated landscapes that changed the world. This book encourages the interaction between the anthropocene and the great acceleration that has affected not only Earth’s climate and environment but also the evolution and survival of everything else on Earth. This book makes a compelling read for architects, planners and environmental designers. Their contribution and participation in shaping the natural and built environment are less prioritised. The author seems primarily concerned with the idea of the carbon cycle and fossil fuel-driven changes in the global economy. Consequently, it provoked questions about how these disciplines influence the built environment and climate change.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"20 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87618016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The economic and technological growth in the last quarter of the 20th century and the beginning of the 21st century resulted in a drastic change in the climate (extreme weather conditions for the sustainability of human life on the earth). The updated report of CoP-25 (meeting of Parties), which was held on 3rd December 2019 in Madrid (Spain) used the term “climate emergency” instead of “climate change”. It was a warning for all the developing and developed countries, which depended heavily upon agriculture. The present study highlights some of the global climatic issues which affected the anthropological development in Punjab. This state has been regarded as the backbone of the Indian economy and is also known as the food basket of India. The cropping pattern is changing from diversification to specialisation. The farmers of the Punjab region focus only on rice-wheat cropping patterns. The major factors of resource depletion, particularly in Punjab, are land and water. The problem of food security and environmental degradation is increasing day by day.
{"title":"Climate Change and Ecologically Vulnerable Farming in Punjab: Some Highlights","authors":"Jasvir Singh, Shivjeet Kaur","doi":"10.3233/jcc230021","DOIUrl":"https://doi.org/10.3233/jcc230021","url":null,"abstract":"The economic and technological growth in the last quarter of the 20th century and the beginning of the 21st century resulted in a drastic change in the climate (extreme weather conditions for the sustainability of human life on the earth). The updated report of CoP-25 (meeting of Parties), which was held on 3rd December 2019 in Madrid (Spain) used the term “climate emergency” instead of “climate change”. It was a warning for all the developing and developed countries, which depended heavily upon agriculture. The present study highlights some of the global climatic issues which affected the anthropological development in Punjab. This state has been regarded as the backbone of the Indian economy and is also known as the food basket of India. The cropping pattern is changing from diversification to specialisation. The farmers of the Punjab region focus only on rice-wheat cropping patterns. The major factors of resource depletion, particularly in Punjab, are land and water. The problem of food security and environmental degradation is increasing day by day.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"11 2 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85670552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Desickanta Rajkumar, Dipanwita Das, Sayantika Mukherjee, Amrita Saha
Lakshadweep, a group of islands with one of the least studied coral atolls enclosing lagoons, submerged reefs and banks situated in the Arabian Sea, is now vulnerable due to rapid erosion, turbulent seas and rising ocean temperatures by climate change. Moreover, rising global sea levels have gradually become a critical threat that is going to impact small islands in the upcoming years. This study depicts the present status of the coral reef and the marine life of the Lakshadweep and how climate change might pose a major threat to the islands in the near future.
{"title":"Impact of Climate Change on Coral reef and Marine Life of the Lakshadweep – A Short Review","authors":"Desickanta Rajkumar, Dipanwita Das, Sayantika Mukherjee, Amrita Saha","doi":"10.3233/jcc230019","DOIUrl":"https://doi.org/10.3233/jcc230019","url":null,"abstract":"Lakshadweep, a group of islands with one of the least studied coral atolls enclosing lagoons, submerged reefs and banks situated in the Arabian Sea, is now vulnerable due to rapid erosion, turbulent seas and rising ocean temperatures by climate change. Moreover, rising global sea levels have gradually become a critical threat that is going to impact small islands in the upcoming years. This study depicts the present status of the coral reef and the marine life of the Lakshadweep and how climate change might pose a major threat to the islands in the near future.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"18 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87510008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study monthly Temperature Lapse Rates and basic downscaling technique of subtracting means are used to construct temperature (T) series over East Rathong glacier by using multiple data sets from Automatic Weather Stations (AWS) at Himalayan Mountaineering Institute (HMI), Gangtok Indian Meteorological Department (IMD), Yuksum and ERA5reanalysis data. Precipitation (P) over glacier is estimated using Gangtok IMD data and downscaled ERA5 data. The P data is downscaled using local scaling factor method. Change in volume of 0.180 km3 (from 1962 to 2020) estimated using satellite data are used to construct Mass Balance (MB) series for the glacier. It is observed that the glacier is losing its mass with increasing T, Aerosol Optical Depth (AOD) (from 0.1 in 1980 to 0.2 in 2020), and increasing Pmainly during June-July-August months when temperatures are already high. This study is important as it used multiple data sets along with field data extracted from the literature to study climatic impacts on East Rathong glacier. Data generated from this study may be used in mass balance projection of the glaciers in the absence of field data.
{"title":"A Climate Change Study: Downscaling of Climatic Parameters and Their Assessment Over East Rathong Glacier of Eastern Himalayan Region","authors":"Anubha Aggarwal, S. Anbukumar, A. Mandal","doi":"10.3233/jcc230010","DOIUrl":"https://doi.org/10.3233/jcc230010","url":null,"abstract":"In this study monthly Temperature Lapse Rates and basic downscaling technique of subtracting means are used to construct temperature (T) series over East Rathong glacier by using multiple data sets from Automatic Weather Stations (AWS) at Himalayan Mountaineering Institute (HMI), Gangtok Indian Meteorological Department (IMD), Yuksum and ERA5reanalysis data. Precipitation (P) over glacier is estimated using Gangtok IMD data and downscaled ERA5 data. The P data is downscaled using local scaling factor method. Change in volume of 0.180 km3 (from 1962 to 2020) estimated using satellite data are used to construct Mass Balance (MB) series for the glacier. It is observed that the glacier is losing its mass with increasing T, Aerosol Optical Depth (AOD) (from 0.1 in 1980 to 0.2 in 2020), and increasing Pmainly during June-July-August months when temperatures are already high. This study is important as it used multiple data sets along with field data extracted from the literature to study climatic impacts on East Rathong glacier. Data generated from this study may be used in mass balance projection of the glaciers in the absence of field data.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"62 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80494856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Media reporting of climate change has long influenced public perception of the issue. The present study attempts to understand the media presentation of climate change in India by investigating the framing of climate change discourses in 30 editorials of prominent Indian English newspapers, The Times of India, The Indian Express, and The Hindu, with the help of corpus-assisted frame analysis using Sketch Engine software. The study utilised corpus techniques, like keyword and concordance analysis, along with open coding, to extract common “frames” that figure prominently in the selected newspapers. The results revealed that four major frames were employed by the newspapers: climate change as a worrisome reality that requires immediate attention; climate compensation and mitigation funds as contentious issues that require deliberation between developed and developing nations; India as an active participant in mitigation efforts; and climate crisis as a geopolitical issue that requires cooperation across the board. The analysis resulted in the conclusion that these newspapers displayed little climate scepticism, was sensitive to the economics of mitigative action, and were interested in India’s role in the conversations regarding climate change on the global stage.
{"title":"Corpus-Assisted Frame Analysis of Climate Change Editorials in Indian English Language Newspapers","authors":"Lakshmi G. Reghunath, Shahila Zafar","doi":"10.3233/jcc230015","DOIUrl":"https://doi.org/10.3233/jcc230015","url":null,"abstract":"Media reporting of climate change has long influenced public perception of the issue. The present study attempts to understand the media presentation of climate change in India by investigating the framing of climate change discourses in 30 editorials of prominent Indian English newspapers, The Times of India, The Indian Express, and The Hindu, with the help of corpus-assisted frame analysis using Sketch Engine software. The study utilised corpus techniques, like keyword and concordance analysis, along with open coding, to extract common “frames” that figure prominently in the selected newspapers. The results revealed that four major frames were employed by the newspapers: climate change as a worrisome reality that requires immediate attention; climate compensation and mitigation funds as contentious issues that require deliberation between developed and developing nations; India as an active participant in mitigation efforts; and climate crisis as a geopolitical issue that requires cooperation across the board. The analysis resulted in the conclusion that these newspapers displayed little climate scepticism, was sensitive to the economics of mitigative action, and were interested in India’s role in the conversations regarding climate change on the global stage.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"60 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78134772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bhavneet Gulati, Raghuveerv Sharma, S. Kanga, S. Singh, Bhartendu Sajan, Gowhar Meraj, Pankaj Kumar, AL. Ramanathan
Stubble burning in Punjab, India, poses significant environmental challenges, particularly impacting air quality. This study aims to examine the spatial and temporal patterns of stubble burning events and their potential effect on ambient air quality from 2019 to 2022. High-resolution Sentinel-2 satellite imagery was employed to delineate the spatial extent of stubble burning. Burnt areas were identified using the Normalised Burn Ratio (NBR). Air quality was evaluated based on PM2.5 and PM10 concentrations data obtained from the Punjab Pollution Control Board. The Inverse Distance Weighting (IDW) interpolation technique was used to estimate pollution values in areas lacking direct monitoring. The study revealed significant year-to-year variations in areas affected by stubble burning. The smallest burnt areas were recorded in October 2019 and 2021 (209 sq km), while the largest was in 2020 (755.38 sq km). In every year studied, the burnt area in November consistently exceeded that in October, with the largest area (10315 sq km) observed in 2021. PM2.5 and PM10 concentrations also showed annual fluctuations, with the highest recorded in 2020 and 2021. In particular, in October 2020, higher PM2.5 and PM10 levels were detected in the eastern region of Punjab. November consistently exhibited higher PM2.5 and PM10 concentrations than October for all years analysed, peaking in 2021. The spatial and temporal variations of stubble burning events and their relationship with air quality highlight the need for targeted interventions. Understanding these patterns is crucial for mitigating the adverse effects of stubble burning on air quality in Punjab, India. Future research should focus on evaluating the effectiveness of various mitigation strategies.
{"title":"Unraveling the Relationship Between Stubble Burning and Air Quality Degradation in Punjab: A Temporal and Spatial Analysis (2019-2022)","authors":"Bhavneet Gulati, Raghuveerv Sharma, S. Kanga, S. Singh, Bhartendu Sajan, Gowhar Meraj, Pankaj Kumar, AL. Ramanathan","doi":"10.3233/jcc230014","DOIUrl":"https://doi.org/10.3233/jcc230014","url":null,"abstract":"Stubble burning in Punjab, India, poses significant environmental challenges, particularly impacting air quality. This study aims to examine the spatial and temporal patterns of stubble burning events and their potential effect on ambient air quality from 2019 to 2022. High-resolution Sentinel-2 satellite imagery was employed to delineate the spatial extent of stubble burning. Burnt areas were identified using the Normalised Burn Ratio (NBR). Air quality was evaluated based on PM2.5 and PM10 concentrations data obtained from the Punjab Pollution Control Board. The Inverse Distance Weighting (IDW) interpolation technique was used to estimate pollution values in areas lacking direct monitoring. The study revealed significant year-to-year variations in areas affected by stubble burning. The smallest burnt areas were recorded in October 2019 and 2021 (209 sq km), while the largest was in 2020 (755.38 sq km). In every year studied, the burnt area in November consistently exceeded that in October, with the largest area (10315 sq km) observed in 2021. PM2.5 and PM10 concentrations also showed annual fluctuations, with the highest recorded in 2020 and 2021. In particular, in October 2020, higher PM2.5 and PM10 levels were detected in the eastern region of Punjab. November consistently exhibited higher PM2.5 and PM10 concentrations than October for all years analysed, peaking in 2021. The spatial and temporal variations of stubble burning events and their relationship with air quality highlight the need for targeted interventions. Understanding these patterns is crucial for mitigating the adverse effects of stubble burning on air quality in Punjab, India. Future research should focus on evaluating the effectiveness of various mitigation strategies.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"45 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78530855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Kongeswaran, R. Muthuramalingam, K. Sivakumar, S. Venkatramanan, A. Muruganantham, S. Bangaru Priyanga, S. Chandramohan
The study of sedimentary characteristics and paleontology is very useful in assessing the past environment of a study area. The Karankadu estuary study area is considered to be one of the most ecologically diverse in the Ramanathapuram district of southern India. The sedimentological and recent foraminiferal assemblages were studied using a drill core from the estuary. Foraminifera analyses, grain size analyses, heavy mineral analyses and XRD maps were prepared for the present study. A total of 30 species were identified from the following suborders: Rotalina, Lagenina, Mollusca, Miliolina, and Textularina. Grain size analysis identified the substrate as mostly silty clay. Heavy mineral analysis identified 90% of light minerals and 10% of heavy minerals. In XRD analysis, quartz and feldspar appeared as major minerals and garnet, zircon, hypersthene, magnetite and ilmenite as minor minerals. The present study shows that the environment is more diverse due to its quiet character and less responsive to hazardous events such as floods and waves.
{"title":"Study of Palaeoclimate Reconstruction Using Sediments and Micropaleontology in the Karankadu Estuary, Ramanathapuram District, Tamil Nadu, India","authors":"T. Kongeswaran, R. Muthuramalingam, K. Sivakumar, S. Venkatramanan, A. Muruganantham, S. Bangaru Priyanga, S. Chandramohan","doi":"10.3233/jcc230012","DOIUrl":"https://doi.org/10.3233/jcc230012","url":null,"abstract":"The study of sedimentary characteristics and paleontology is very useful in assessing the past environment of a study area. The Karankadu estuary study area is considered to be one of the most ecologically diverse in the Ramanathapuram district of southern India. The sedimentological and recent foraminiferal assemblages were studied using a drill core from the estuary. Foraminifera analyses, grain size analyses, heavy mineral analyses and XRD maps were prepared for the present study. A total of 30 species were identified from the following suborders: Rotalina, Lagenina, Mollusca, Miliolina, and Textularina. Grain size analysis identified the substrate as mostly silty clay. Heavy mineral analysis identified 90% of light minerals and 10% of heavy minerals. In XRD analysis, quartz and feldspar appeared as major minerals and garnet, zircon, hypersthene, magnetite and ilmenite as minor minerals. The present study shows that the environment is more diverse due to its quiet character and less responsive to hazardous events such as floods and waves.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"25 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84773720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tran Van Ty, Le Hai Tri, Nguyen Van Tho, Nguyen Van Toan, Giap Minh Nhat, N. Downes, Pankaj Kumar, Huỳnh Vương Thu Minh
This study evaluates the performance of simulated precipitation and maximum and minimum temperatures in the historical runs of the Climate Model Intercomparison Project Phase 6 (CMIP6) for the Vietnamese Mekong Delta (VMD). The precipitation, as well as maximum and minimum temperatures outputs from 16 general circulation models (GCMs), were compared with observations from 12 stations for the period 1980–2014, using a set of statistical metrics, namely, normalised root mean square error (NRMSE), percentage of bias (PBIAS), Nash–Sutcliffe efficiency (NSE), coefficient of determination (R2), and volumetric efficiency (VE). Finally, ranking (total score - TS) was carried out and the probability distribution function (PDF) and Taylor diagram were used to confirm rankings. The results show that different statistical indicators reveal variation ranking order of the 16 GCMs. Based on RS ranking, it is indicated that each simulation GCM performed differently under the different metrics and no single model performed best for all metrics. The top five highest ranked GCMs based on TS were HadGEM3-GC31-LL, ACCESS-CM2, CanESM5, NESM3 and CanESM5-CanOE for precipitation; and CNRM-CM6-1, CNRM-ESM2-1, GFDL-ESM4, NESM3 and INM-CM5-0 for the maximum; and CNRM-CM6-1, CNRM-ESM2-1, GFDL-ESM4, NESM3 and INM-CM5-0 for minimum temperatures, respectively. We also observed an underestimation of precipitation and an overestimation of temperature over the study area. The TS method demonstrates efficiency to aggregate the multi-model ensemble GCMs based on different statistical indicators which were sometimes contradictory. The findings from this study provide useful guidance in the selection of GCMs for climate change applications in the VMD.
{"title":"Evaluating the Performance of CMIP6 GCMs to Simulate Precipitation and Temperature Over the Vietnamese Mekong Delta","authors":"Tran Van Ty, Le Hai Tri, Nguyen Van Tho, Nguyen Van Toan, Giap Minh Nhat, N. Downes, Pankaj Kumar, Huỳnh Vương Thu Minh","doi":"10.3233/jcc230013","DOIUrl":"https://doi.org/10.3233/jcc230013","url":null,"abstract":"This study evaluates the performance of simulated precipitation and maximum and minimum temperatures in the historical runs of the Climate Model Intercomparison Project Phase 6 (CMIP6) for the Vietnamese Mekong Delta (VMD). The precipitation, as well as maximum and minimum temperatures outputs from 16 general circulation models (GCMs), were compared with observations from 12 stations for the period 1980–2014, using a set of statistical metrics, namely, normalised root mean square error (NRMSE), percentage of bias (PBIAS), Nash–Sutcliffe efficiency (NSE), coefficient of determination (R2), and volumetric efficiency (VE). Finally, ranking (total score - TS) was carried out and the probability distribution function (PDF) and Taylor diagram were used to confirm rankings. The results show that different statistical indicators reveal variation ranking order of the 16 GCMs. Based on RS ranking, it is indicated that each simulation GCM performed differently under the different metrics and no single model performed best for all metrics. The top five highest ranked GCMs based on TS were HadGEM3-GC31-LL, ACCESS-CM2, CanESM5, NESM3 and CanESM5-CanOE for precipitation; and CNRM-CM6-1, CNRM-ESM2-1, GFDL-ESM4, NESM3 and INM-CM5-0 for the maximum; and CNRM-CM6-1, CNRM-ESM2-1, GFDL-ESM4, NESM3 and INM-CM5-0 for minimum temperatures, respectively. We also observed an underestimation of precipitation and an overestimation of temperature over the study area. The TS method demonstrates efficiency to aggregate the multi-model ensemble GCMs based on different statistical indicators which were sometimes contradictory. The findings from this study provide useful guidance in the selection of GCMs for climate change applications in the VMD.","PeriodicalId":43177,"journal":{"name":"Journal of Climate Change","volume":"23 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84797236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：