The East China coast is one major cyclogenesis region of extratropical cyclones (ETCs) in boreal winter. In this study, the climatological characteristics of winter ETCs passing over the coastal water of China are analyzed by using clustering and composite analysis. Automated cyclone detection and tracking algorithm are used to identify the ETCs, which are further classified into subgroups according to their trajectory features by using the probabilistic clustering algorithm. Six distinct types of straight moving or recurving trajectories with different climatological characteristics are identified in the clustering analysis. Accordingly, the composite analyses also present six distinct synoptic patterns corresponding to cyclogenesis as well as the impact of ETCs on terrestrial precipitation. The spatio-temporal characteristics of winter ETCs’ origination, movement, and impact are revealed by the clustering and composite analyses.
{"title":"Climatology of Winter Extratropical Cyclones over the Coastal Waters of China","authors":"Naru Xie, Meng Gao, Zhiqiang Gao","doi":"10.30564/JASR.V2I2.919","DOIUrl":"https://doi.org/10.30564/JASR.V2I2.919","url":null,"abstract":"The East China coast is one major cyclogenesis region of extratropical cyclones (ETCs) in boreal winter. In this study, the climatological characteristics of winter ETCs passing over the coastal water of China are analyzed by using clustering and composite analysis. Automated cyclone detection and tracking algorithm are used to identify the ETCs, which are further classified into subgroups according to their trajectory features by using the probabilistic clustering algorithm. Six distinct types of straight moving or recurving trajectories with different climatological characteristics are identified in the clustering analysis. Accordingly, the composite analyses also present six distinct synoptic patterns corresponding to cyclogenesis as well as the impact of ETCs on terrestrial precipitation. The spatio-temporal characteristics of winter ETCs’ origination, movement, and impact are revealed by the clustering and composite analyses.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122623358","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 seasonal changes in the energy balance after the substitution of a herbaceous savanna by a Brachiaria field located in the Orinoco lowlands were assessed over an entire year using the eddy covariance technique. Simultaneously, an herbaceous savanna was monitored as a control. This work provides evidence that the vegetation replacement lead to different patterns of energy and water balance. The seasonal trends of the latent heat flux (λE) to available energy (Ra) ratio tended to decrease as senescence increased due to seasonal influence of air humidity mole fraction deficit and soil water content on leaf area index (LAI) and surface conductance (gs). Therefore, the partitioning of the available energy depended on both climatological (i.e., solar radiation, volumetric soil water content and air humidity mole fraction deficit) and biological variables (i.e., conductance behavior and LAI) which were stress-induced. For the wet season, the seasonally averaged daily λE in the Brachiaria field (i.e., 0.8 ± 0.1 mm d-1) was 1.3-fold higher than that in the herbaceous savanna (i.e., 0.6 ± 0.1 mm d-1) (Mann-Whitney U-test). For the dry season, the value was 2.7 ± 0.6 and 2.2 ± 0.4 mm d-1, respectively, these means values were not significantly different. In the Brachiaria and herbaceous savanna stands, the annual evapotranspiration was 731 and 594 mm year-1, respectively, and the annual ratio of evapotranspiration to precipitation was 0.52 to 0.42 respectively. In Brachiaria field, the deep drainage was relatively lower (43% of total precipitation) than that in the herbaceous savanna stand (53%) leaving a similar amount of water to increase soil storage. The current shift in land cover decrease deep drainage and increased λE by water uptake from a pasture with high belowground phytomass and LAI.
利用涡旋相关方差技术评估了奥里诺科河低地腕子蒿田取代草本稀树草原后能量平衡的季节变化。同时，监测了一个草本稀树草原作为对照。这项工作提供了植被更替导致不同模式的能量和水分平衡的证据。由于空气湿度摩尔分数亏缺和土壤含水量对叶面积指数(LAI)和表面电导(gs)的季节性影响，潜热通量(λE) /有效能(Ra)比随衰老的增加呈下降趋势。因此，有效能量的分配取决于气候变量(如太阳辐射、土壤体积含水量和空气湿度摩尔分数缺陷)和生物变量(如电导行为和LAI)，这些变量都是由应力引起的。在丰水期，Brachiaria田间的季节平均日λE(0.8±0.1 mm d-1)是草本草原的1.3倍(0.6±0.1 mm d-1) (Mann-Whitney u检验)。旱季的平均值分别为2.7±0.6 mm d-1和2.2±0.4 mm d-1，两者差异不显著。樟子蒿和草本稀树草原林分年蒸散量分别为731和594 mm -1，年蒸散与降水的比值分别为0.52和0.42。在腕鱼田，深层排水(占总降水量的43%)相对低于草本稀树草原林分(53%)，留下了相似的水量来增加土壤储存量。当前土地覆被的变化减少了深层排水，增加了高地下生物量和LAI牧草的吸水量。
{"title":"Land-use Changes Alter Energy and Water Balances on an African BrachiariaPasture Replacing a Native Savanna in the Orinoco llanos","authors":"J. José, R. Montes","doi":"10.30564/JASR.V2I2.558","DOIUrl":"https://doi.org/10.30564/JASR.V2I2.558","url":null,"abstract":"The seasonal changes in the energy balance after the substitution of a herbaceous savanna by a Brachiaria field located in the Orinoco lowlands were assessed over an entire year using the eddy covariance technique. Simultaneously, an herbaceous savanna was monitored as a control. This work provides evidence that the vegetation replacement lead to different patterns of energy and water balance. The seasonal trends of the latent heat flux (λE) to available energy (Ra) ratio tended to decrease as senescence increased due to seasonal influence of air humidity mole fraction deficit and soil water content on leaf area index (LAI) and surface conductance (gs). Therefore, the partitioning of the available energy depended on both climatological (i.e., solar radiation, volumetric soil water content and air humidity mole fraction deficit) and biological variables (i.e., conductance behavior and LAI) which were stress-induced. For the wet season, the seasonally averaged daily λE in the Brachiaria field (i.e., 0.8 ± 0.1 mm d-1) was 1.3-fold higher than that in the herbaceous savanna (i.e., 0.6 ± 0.1 mm d-1) (Mann-Whitney U-test). For the dry season, the value was 2.7 ± 0.6 and 2.2 ± 0.4 mm d-1, respectively, these means values were not significantly different. In the Brachiaria and herbaceous savanna stands, the annual evapotranspiration was 731 and 594 mm year-1, respectively, and the annual ratio of evapotranspiration to precipitation was 0.52 to 0.42 respectively. In Brachiaria field, the deep drainage was relatively lower (43% of total precipitation) than that in the herbaceous savanna stand (53%) leaving a similar amount of water to increase soil storage. The current shift in land cover decrease deep drainage and increased λE by water uptake from a pasture with high belowground phytomass and LAI.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115335991","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}
Dust storms are commonly occurring phenomena in Tajikistan. The known aridity of the region is a major factor in promoting numerous dust storms. They have many diverse impacts on the environment and the climate of the region. The classification of dust storms and synoptic conditions related to their formation in Central Asia are discussed in the content of their diverse impact. We address dust optical properties that are representative of the region. Dust storms significantly reduce visibly and pose a human health threads. They also cause a significant impact on the radiative regime. As a result, dust storms may cause a decrease in temperature during daytime of up to 16 о С and an increase in temperature during night time from up to 7 о С compared to a clear day.
{"title":"Main Characteristics of Dust Storm sand Their Radiative Impacts: With a Focuson Tajikistan","authors":"S. Abdullaev, I. Sokolik","doi":"10.30564/JASR.V2I2.352","DOIUrl":"https://doi.org/10.30564/JASR.V2I2.352","url":null,"abstract":"Dust storms are commonly occurring phenomena in Tajikistan. The known aridity of the region is a major factor in promoting numerous dust storms. They have many diverse impacts on the environment and the climate of the region. The classification of dust storms and synoptic conditions related to their formation in Central Asia are discussed in the content of their diverse impact. We address dust optical properties that are representative of the region. Dust storms significantly reduce visibly and pose a human health threads. They also cause a significant impact on the radiative regime. As a result, dust storms may cause a decrease in temperature during daytime of up to 16 о С and an increase in temperature during night time from up to 7 о С compared to a clear day. ","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124635564","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 current paper aims to discuss the potential of sustainable energy management in a decentralized manner by integrating cleaner energy production initiatives using different energy sources as a tool for achieving sustainability. In order to have a robust analysis our methods choose a specific case study based on industrial consumption. In this case, our goal is to conduct a comparative analysis of the use of diesel oil and replacing it with piped natural gas in a cogeneration system at the municipal industrial sector, aimed at local development through cleaner production mechanisms. This paper conduct a survey of the potential for cogeneration in the industrial sector of the municipality of Novo Hamburgo. The results have shown advantages of reducing CO2, CH4, N2O emissions and particulate matter in diesel oil replacement project by natural gas, and the need to maintain the NOx emission rates. Finally, after theoretical studies for our case, we concluded that after the diesel oil replacement for natural gas, the results of emissions would be beneficial and with this choice, it would be achieved a sustainable cleaner energy production.
{"title":"An assessment of industrial energy consumption and a contribution to cleaner production initiatives","authors":"H. Costa, Natália De Assis Brasil Webe","doi":"10.30564/JASR.V2I1.419","DOIUrl":"https://doi.org/10.30564/JASR.V2I1.419","url":null,"abstract":"The current paper aims to discuss the potential of sustainable energy management in a decentralized manner by integrating cleaner energy production initiatives using different energy sources as a tool for achieving sustainability. In order to have a robust analysis our methods choose a specific case study based on industrial consumption. In this case, our goal is to conduct a comparative analysis of the use of diesel oil and replacing it with piped natural gas in a cogeneration system at the municipal industrial sector, aimed at local development through cleaner production mechanisms. This paper conduct a survey of the potential for cogeneration in the industrial sector of the municipality of Novo Hamburgo. The results have shown advantages of reducing CO2, CH4, N2O emissions and particulate matter in diesel oil replacement project by natural gas, and the need to maintain the NOx emission rates. Finally, after theoretical studies for our case, we concluded that after the diesel oil replacement for natural gas, the results of emissions would be beneficial and with this choice, it would be achieved a sustainable cleaner energy production.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117335974","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 study discusses the energetic aspects of tropical cyclones formed over Arabian Sea (AS) and Bay of Bengal (BOB) during the period from 1991 till 2013 and aims at bringing out climatology of the energetics of tropical cyclones over Indian Seas. Total 88 cyclones that developed over the Indian Seas during the recent decade of 1991-2013 have been studied. These intense systems are categorized on the basis of their formation region and season of formation. It is seen that during the study period, the frequency of formation of cyclones over BOB is twice that over AS which is consistent with the climatology of the regions. Further, it is noticed that over both the regions, they are more frequently formed in the post monsoon period compared to pre monsoon. The trend analysis of the frequency of cyclones forming over both basins, season wise shows that the overall trend for both basins is of just decreasing type. However, for Arabian Sea; the decreasing trend is more apparent in the post monsoon season, whereas in the case of the Bay of Bengal the decreasing trend is more evident in the pre monsoon season. Various energy terms, their generation and conversion terms have been computed using NCEP/NCAR reanalysis data. Day to day quantitative analysis of these parameters is studied critically during various stages of the cyclones. The composites of these categorized systems are formed and studied. The formative, intensification and dissipation stages showed variations in their energy terms.
{"title":"Climatology of Energetics of cyclones over Indian Seas","authors":"S. Dutta, Geena Sandhu, S. Narkhedkar, S. Devi","doi":"10.30564/JASR.V2I1.266","DOIUrl":"https://doi.org/10.30564/JASR.V2I1.266","url":null,"abstract":"The study discusses the energetic aspects of tropical cyclones formed over Arabian Sea (AS) and Bay of Bengal (BOB) during the period from 1991 till 2013 and aims at bringing out climatology of the energetics of tropical cyclones over Indian Seas. Total 88 cyclones that developed over the Indian Seas during the recent decade of 1991-2013 have been studied. These intense systems are categorized on the basis of their formation region and season of formation. It is seen that during the study period, the frequency of formation of cyclones over BOB is twice that over AS which is consistent with the climatology of the regions. Further, it is noticed that over both the regions, they are more frequently formed in the post monsoon period compared to pre monsoon. The trend analysis of the frequency of cyclones forming over both basins, season wise shows that the overall trend for both basins is of just decreasing type. However, for Arabian Sea; the decreasing trend is more apparent in the post monsoon season, whereas in the case of the Bay of Bengal the decreasing trend is more evident in the pre monsoon season. Various energy terms, their generation and conversion terms have been computed using NCEP/NCAR reanalysis data. Day to day quantitative analysis of these parameters is studied critically during various stages of the cyclones. The composites of these categorized systems are formed and studied. The formative, intensification and dissipation stages showed variations in their energy terms.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116720328","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}
ToThe Editor,Journal of Atmospheric Science ResearchSir/Madam,SUBJECT: Withdrawal of Article from your journal 2. I/We wish to withdraw my/our Article which has been Submitted/Submitted and accepted at your end/ Submitted, Accepted and Published by you3. The Details of my/our Article are as below:Article TitleHigh-Resolution Radiometer for Remote Sensing of Solar Flare Activity from Low Earth Orbit SatellitesDate of Submission20/12/2018Status of article (Under review/Accepted/Published)PublishedIn case the Article is already published, the Issue & Volume of the JournalVol 1, No 1 (2018)Reason(s) for Withdrawal of ArticleThe material that I used has been created in collaboration with other authors, to whom I did not request permission. This was due not to malicious intentions, but due to my superficial behavior induced by the extreme hurry with which I had to prepare the article.Name of the Corresponding AuthorLuca AluigiName(s) of the Other Author(s) (If any)Signature(s) of the Author(s)affirming that he/they agree with the Corresponding Author in requesting the Withdrawal/Retraction of this Article12 4. Disclaimer:I / I and my Co-Authors have carefully read the ‘Article Withdrawal and Retraction Policy (the Policy)’ of the Journal and agree to abide by the same.The Decision of the Editorial Board is final and shall be binding on me/us. The legality of the Decision will not be challenged anytime in any Court of Law.Submitted for the consideration of the Editor.Luca Aluigi Date: 25/02/2019
{"title":"SUBJECT: Withdrawal of Article from your journal < High-Resolution Radiometer for Remote Sensing of Solar Flare Activity from Low Earth Orbit Satellites>","authors":"L. Aluigi","doi":"10.30564/JASR.V2I1.621","DOIUrl":"https://doi.org/10.30564/JASR.V2I1.621","url":null,"abstract":"ToThe Editor,Journal of Atmospheric Science ResearchSir/Madam,SUBJECT: Withdrawal of Article from your journal 2. I/We wish to withdraw my/our Article which has been Submitted/Submitted and accepted at your end/ Submitted, Accepted and Published by you3. The Details of my/our Article are as below:Article TitleHigh-Resolution Radiometer for Remote Sensing of Solar Flare Activity from Low Earth Orbit SatellitesDate of Submission20/12/2018Status of article (Under review/Accepted/Published)PublishedIn case the Article is already published, the Issue & Volume of the JournalVol 1, No 1 (2018)Reason(s) for Withdrawal of ArticleThe material that I used has been created in collaboration with other authors, to whom I did not request permission. This was due not to malicious intentions, but due to my superficial behavior induced by the extreme hurry with which I had to prepare the article.Name of the Corresponding AuthorLuca AluigiName(s) of the Other Author(s) (If any)Signature(s) of the Author(s)affirming that he/they agree with the Corresponding Author in requesting the Withdrawal/Retraction of this Article12 4. Disclaimer:I / I and my Co-Authors have carefully read the ‘Article Withdrawal and Retraction Policy (the Policy)’ of the Journal and agree to abide by the same.The Decision of the Editorial Board is final and shall be binding on me/us. The legality of the Decision will not be challenged anytime in any Court of Law.Submitted for the consideration of the Editor.Luca Aluigi Date: 25/02/2019","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114509490","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}
Abstract：The wind speed and wind direction meter of meteorological station is installed on the wind meter pole 10 meters high from the observation site, which also causes some difficulties for the maintenance of the wind speed and wind direction meter in the later period. Based on this situation, an electric lifting worktable (referred to as the electric lifting worktable) is specially designed for the maintenance of wind meters in meteorological observation sites. It can lift the maintenance personnel and equipment and tools to a height convenient for work, and then grasp the wind meter pole through the mechanical arm. It can be operated by a single person, thus getting rid of the traditional dimension by climbing the wind meter pole or releasing the wind meter pole. The present situation of repairing has the characteristics of saving manpower and easy operation, which is conducive to improving work efficiency and reducing work intensity. It also greatly guarantees the safety of maintenance personnel, and has good practicability and extensive popularization value.
{"title":"Design Scheme of Electric Lifting Workbench for Maintenance of Aerometer in Observation Field","authors":"Haitao Yan","doi":"10.30564/JASR.V2I1.443","DOIUrl":"https://doi.org/10.30564/JASR.V2I1.443","url":null,"abstract":"Abstract：The wind speed and wind direction meter of meteorological station is installed on the wind meter pole 10 meters high from the observation site, which also causes some difficulties for the maintenance of the wind speed and wind direction meter in the later period. Based on this situation, an electric lifting worktable (referred to as the electric lifting worktable) is specially designed for the maintenance of wind meters in meteorological observation sites. It can lift the maintenance personnel and equipment and tools to a height convenient for work, and then grasp the wind meter pole through the mechanical arm. It can be operated by a single person, thus getting rid of the traditional dimension by climbing the wind meter pole or releasing the wind meter pole. The present situation of repairing has the characteristics of saving manpower and easy operation, which is conducive to improving work efficiency and reducing work intensity. It also greatly guarantees the safety of maintenance personnel, and has good practicability and extensive popularization value.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123821596","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 most significant part of the Wade Area Augmentation System (WAAS) integrity data consists of the User Differential Range Error (UDRE) and the Grid Ionospheric Vertical Error (GIVE). WAAS solutions are not completely appropriate to determine the GIVE term within the entire wade area coverage zone taking in account real irregular structure of the ionosphere. It leads to the larger confidence bounding terms and lower expected positioning availability in comparison to the reality under geomagnetic storm conditions and system outages. Thus a question arises: is the basic WAAS concept appropriate to provide the same efficiency of the integrity monitoring for both “global differential correction (i.e. clock, ephemeris etc)” and “local differential correction (i.e. ionoshrere, troposhpere and multipath)”? The aim of this paper is to compare official WAAS integrity monitoring reports and real positioning quality in US coverage zone (CONUS) and Canada area under geomagnetic storm conditions and system outages. In this research we are interested in comparison between real GPS positioning quality based on one-frequency C/A ranging mode and HAL (VAL) values which correspond to the LP, LPV and LPV200 requirements. Significant mismatch of the information between WAAS integrity data and real positioning quality was unfolded as a result of this comparison under geomagnetic storms and system outages on February, 2011 and June 22, 2015. Based on this result we think that in order to achieve high confidence of WAAS positioning availability alerts real ionospheric measurements within the wide area coverage zone must be involved instead of the WAAS GIVE values. The better way to realize this idea is to combine WAAS solutions to derive “global differential corrections” and LAAS solutions to derive “local differential corrections”.
{"title":"Moderate geomagnetic storm condition, WAAS Alerts and real GPS positioning quality","authors":"V. Demyanov, Xinggang Zhang, Xiaochun Lu","doi":"10.30564/JASR.V2I1.343","DOIUrl":"https://doi.org/10.30564/JASR.V2I1.343","url":null,"abstract":"The most significant part of the Wade Area Augmentation System (WAAS) integrity data consists of the User Differential Range Error (UDRE) and the Grid Ionospheric Vertical Error (GIVE). WAAS solutions are not completely appropriate to determine the GIVE term within the entire wade area coverage zone taking in account real irregular structure of the ionosphere. It leads to the larger confidence bounding terms and lower expected positioning availability in comparison to the reality under geomagnetic storm conditions and system outages. Thus a question arises: is the basic WAAS concept appropriate to provide the same efficiency of the integrity monitoring for both “global differential correction (i.e. clock, ephemeris etc)” and “local differential correction (i.e. ionoshrere, troposhpere and multipath)”? The aim of this paper is to compare official WAAS integrity monitoring reports and real positioning quality in US coverage zone (CONUS) and Canada area under geomagnetic storm conditions and system outages. In this research we are interested in comparison between real GPS positioning quality based on one-frequency C/A ranging mode and HAL (VAL) values which correspond to the LP, LPV and LPV200 requirements. Significant mismatch of the information between WAAS integrity data and real positioning quality was unfolded as a result of this comparison under geomagnetic storms and system outages on February, 2011 and June 22, 2015. Based on this result we think that in order to achieve high confidence of WAAS positioning availability alerts real ionospheric measurements within the wide area coverage zone must be involved instead of the WAAS GIVE values. The better way to realize this idea is to combine WAAS solutions to derive “global differential corrections” and LAAS solutions to derive “local differential corrections”.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121458441","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}
S. Tabassum, A. Siddika, M. Sultana, M. Rahaman, M. S. Bashar
Due to the availability, non-toxicity and cost-effectivity, natural dyes are becoming popular day by day. In this study, dye-sensitized solar cells (DSSCs) were fabricated using natural dyes containing anthocyanins extracted from pomegranate, blackberry and beet route. TiO2 film on FTO glass prepared by doctor blade method was employed as photoanode. The structural and morphological properties of photoanode was studied using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The extracted dye absorption was evaluated by UV-Vis-NIR spectroscopy. The fabricated cells have efficiency in the range of 0.015 – 0.042% which has been measured by sun simulator.
{"title":"Dye Sensitized Solar Cell using natural dye as light harvesting sensitizer","authors":"S. Tabassum, A. Siddika, M. Sultana, M. Rahaman, M. S. Bashar","doi":"10.30564/JASR.V2I1.469","DOIUrl":"https://doi.org/10.30564/JASR.V2I1.469","url":null,"abstract":"Due to the availability, non-toxicity and cost-effectivity, natural dyes are becoming popular day by day. In this study, dye-sensitized solar cells (DSSCs) were fabricated using natural dyes containing anthocyanins extracted from pomegranate, blackberry and beet route. TiO2 film on FTO glass prepared by doctor blade method was employed as photoanode. The structural and morphological properties of photoanode was studied using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The extracted dye absorption was evaluated by UV-Vis-NIR spectroscopy. The fabricated cells have efficiency in the range of 0.015 – 0.042% which has been measured by sun simulator.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131283784","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}
Air quality models are tools capable to predict the physical and chemical processes that occur in atmosphere affecting the atmospheric composition, such as wind advection, turbulent diffusion, wet and dry deposition, chemical reactions, photolysis, anthropogenic and biogenic emission processes. These models need input data containing information about atmosphere (usually from a global atmospheric model), terrestrial data (usually for the models maintainer) and emissions (that comes from air quality pollution inventories). EmissV is a code written to create emissions input for these atmospheric models.
{"title":"EmissV: A preprocessor for WRF-Chem model","authors":"D. Schuch","doi":"10.30564/jasr.v1i1.347","DOIUrl":"https://doi.org/10.30564/jasr.v1i1.347","url":null,"abstract":"Air quality models are tools capable to predict the physical and chemical processes that occur in atmosphere affecting the atmospheric composition, such as wind advection, turbulent diffusion, wet and dry deposition, chemical reactions, photolysis, anthropogenic and biogenic emission processes. These models need input data containing information about atmosphere (usually from a global atmospheric model), terrestrial data (usually for the models maintainer) and emissions (that comes from air quality pollution inventories). EmissV is a code written to create emissions input for these atmospheric models.","PeriodicalId":193824,"journal":{"name":"Journal of Atmospheric Science Research","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132287756","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}
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