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Climate Sensitivity and Feedbacks of a New Coupled Model CAMS-CSM to Idealized CO2 Forcing: A Comparison with CMIP5 Models
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作者 Xiaolong CHEN Zhun GUO +5 位作者 Tianjun ZHOU Jian LI Xinyao RONG Yufei XIN Haoming CHEN Jingzhi SU 《气象学报:英文版》 SCIE CSCD 2019年第1期31-45,共15页
Climate sensitivity and feedbacks are basic and important metrics to a climate system. They determine how large surface air temperature will increase under CO2 forcing ultimately, which is essential for carbon reducti... Climate sensitivity and feedbacks are basic and important metrics to a climate system. They determine how large surface air temperature will increase under CO2 forcing ultimately, which is essential for carbon reduction policies to achieve a specific warming target. In this study, these metrics are analyzed in a climate system model newly developed by the Chinese Academy of Meteorological Sciences(CAMS-CSM) and compared with multi-model results from the Coupled Model Comparison Project phase 5(CMIP5). Based on two idealized CO2 forcing scenarios, i.e.,abruptly quadrupled CO2 and CO2 increasing 1% per year, the equilibrium climate sensitivity(ECS) and transient climate response(TCR) in CAMS-CSM are estimated to be about 2.27 and 1.88 K, respectively. The ECS is near the lower bound of CMIP5 models whereas the TCR is closer to the multi-model ensemble mean(MME) of CMIP5 due to compensation of a relatively low ocean heat uptake(OHU) efficiency. The low ECS is caused by an unusually negative climate feedback in CAMS-CSM, which is attributed to cloud shortwave feedback(λSWCL) over the tropical Indo-Pacific Ocean.The CMIP5 ensemble shows that more negative λSWCL is related to larger increase in low-level(925–700 hPa)cloud over the tropical Indo-Pacific under warming, which can explain about 90% of λSWCL in CAMS-CSM. Static stability of planetary boundary layer in the pre-industrial simulation is a critical factor controlling the low-cloud response and λSWCL across the CMIP5 models and CAMS-CSM. Evidently, weak stability in CAMS-CSM favors lowcloud formation under warming due to increased low-level convergence and relative humidity, with the help of enhanced evaporation from the warming tropical Pacific. Consequently, cloud liquid water increases, amplifying cloud albedo, and eventually contributing to the unusually negative λSWCL and low ECS in CAMS-CSM. Moreover, the OHU may influence climate feedbacks and then the ECS by modulating regional sea surface temperature responses. 展开更多
关键词 CLIMATE sensitivity CLIMATE FEEDBACK cloud shortwave FEEDBACK the Chinese Academy of Meteorological Sciences CLIMATE system model(CAMS-CSM) Coupled MODEL COMPARISON Project phase 5(CMIP5)
Institutions for a World of Climate Injustice
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作者 Robert O.Keohane 《复旦人文社会科学论丛:英文版》 2019年第2期293-307,共15页
We live in a world of climate injustice.People in wealthy countries emit large amounts of greenhouse gasses,whose effects will be particularly adverse to people in poor countries who have not received the benefits of ... We live in a world of climate injustice.People in wealthy countries emit large amounts of greenhouse gasses,whose effects will be particularly adverse to people in poor countries who have not received the benefits of past emissions.Although these injustices are deeply embedded in power asymmetries,they could be ameliorated if wealthy societies were to take broad views of their own self-interests.To do so would require,in some instances,changes in the default rules,embedded in sovereignty,that have inhibited positive changes.To ensure that such positive changes ensue will require new and well-designed institutions,two of which are proposed.An Institute for Climate Finance would facilitate offset arrangements by which rich countries pay for emissions reductions in poorer countries.An Institute for Climate Innovation would facilitate the transfer of innovative low-or z|ero-emission energy technology to developing countries. 展开更多
关键词 CLIMATE JUSTICE Multilateral institutions INTERNATIONAL POLITICS CLIMATE FINANCE INTERNATIONAL institutions CLIMATE policy Global JUSTICE
Recent Progress in Studies of the Variabilities and Mechanisms of the East Asian Monsoon in a Changing Climate 预览
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作者 Wen CHEN Lin WANG +4 位作者 Juan FENG Zhiping WEN Tiaojiao MA Xiuqun YANG Chenghai WANG 《大气科学进展:英文版》 SCIE CAS CSCD 2019年第9期887-901,共15页
Located in a monsoon domain,East Asia suffers devastating natural hazards induced by anomalous monsoon behaviors.East Asian monsoon(EAM)research has traditionally been a high priority for the Chinese climate community... Located in a monsoon domain,East Asia suffers devastating natural hazards induced by anomalous monsoon behaviors.East Asian monsoon(EAM)research has traditionally been a high priority for the Chinese climate community and is particularly challenging in a changing climate where the global mean temperature has been rising.Recent advances in studies of the variabilities and mechanisms of the EAM are reviewed in this paper,focusing on the interannual to interdecadal time scales.Some new results have been achieved in understanding the behaviors of the EAM,such as the evolution of the East Asian summer monsoon(EASM),including both its onset and withdrawal over the South China Sea,the changes in the northern boundary activity of the EASM,or the transitional climate zone in East Asia,and the cycle of the EASM and the East Asian winter monsoon and their linkages.In addition,understanding of the mechanism of the EAM variability has improved in several aspects,including the impacts of different types of ENSO on the EAM,the impacts from the Indian Ocean and Atlantic Ocean,and the roles of mid-to high-latitude processes.Finally,some scientific issues regarding our understanding of the EAM are proposed for future investigation. 展开更多
关键词 EAST ASIAN summer MONSOON EAST ASIAN winter MONSOON CHANGING CLIMATE MONSOON onset and withdrawal transitional CLIMATE zone different types of ENSO
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A new look at roles of the cryosphere in sustainable development 预览
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作者 WANG Xiaoming LIU Shi-Wei ZHANG Jing-Lin 《气候变化研究进展:英文版》 CSCD 2019年第2期124-131,共8页
While the cryosphere may bring in adverse impacts on natural and built environment, it may also provide benefits resulting from cryosphere services. By looking into the effect of the cryosphere on human-being, the stu... While the cryosphere may bring in adverse impacts on natural and built environment, it may also provide benefits resulting from cryosphere services. By looking into the effect of the cryosphere on human-being, the study develops a unified approach in the analysis of cryospheric risks and services, with one focusing on the adverse impacts by cryospheric hazards and another emphasizing on the benefits that people can obtain from the natural capitals in the cryosphere. Meanwhile, climate change could further alter and complicate the roles of the cryosphere, not only by the changes in risks to cryospheric hazards, but also the changes in services that could potentially add more risks. The study further proposed a risk-based approach for the development of climate adaptation in the cryosphere. The approach essentially takes options to reduce exposure and vulnerability of societies to cryospheric hazards, and to better manage natural capitals and demands together with enhancing utility of the cryosphere, so as to maintain the benefit of cryosphere services in a sustainable way. The study further addresses the role of cryosphere services in strengthening sustainable development in terms of its relation with the sustainable development goals (SDGs), and provides a preliminary results on how the services contributes to SDGs. Overall, the approach developed in this study creates a new way to comprehensively assess the effect of cryosphere changes on our society and identify measures to maximize the benefit while minimizing the risk in relation to the cryosphere. 展开更多
关键词 CRYOSPHERE Cryospheric science CRYOSPHERE service CRYOSPHERE CHANGE CLIMATE CHANGE impact CLIMATE CHANGE ADAPTATION Risk management
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Disaster Risk Reduction Including Climate Change Adaptation Over South Asia: Challenges and Ways Forward
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作者 Rajesh K.Mall Ravindra K.Srivastava +3 位作者 Tirthankar Banerjee Om Prakash Mishra Diva Bhatt Geetika Sonkar 《国际灾害风险科学学报:英文版》 CSCD 2019年第1期14-27,共14页
South Asia is vulnerable to a variety of hydrometeorological hazards, which are often crossboundary in nature. Climate change is expected to influence many of these hazards. Thus, climate-related risks over South Asia... South Asia is vulnerable to a variety of hydrometeorological hazards, which are often crossboundary in nature. Climate change is expected to influence many of these hazards. Thus, climate-related risks over South Asia make disaster risk reduction(DRR) and climate change adaptation(CCA) key policy goals.Recently there is an increasing consensus that DRR including CCA should be embedded in development planning. Disaster risk reduction including CCA has progressively gained importance in global governance. Across South Asia, however, such integration is only in a preliminary stage. This review was to assess the existing status and scope of DRR including CCA in development projects across South Asia, so that an effective and achievable deliberation may be made to regional policymakers. A total of 371 projects relevant to CCA and DRR were reviewed.The project inventory was diverse in nature with respect to location, scale, sectoral focus, and strategic importance.Bangladesh, India, and Bhutan were observed to be proactive in implementing DRR-and CCA-related projects.Meta-analysis of the project inventory suggests an urgent need for an individual and collaborative convergence of processes for DRR and CCA through policies,plans, strategies, and programs. 展开更多
关键词 CLIMATE CHANGE CLIMATE CHANGE ADAPTATION DISASTER risk reduction SAARC South Asia
Changes in climate regimes over China based on a high-resolution dataset
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作者 Wei Huang Jingjing Yan +1 位作者 Chang Liu Tingting Xie 《科学通报:英文版》 SCIE EI CSCD 2019年第6期377-379,共3页
During the 20th century the global climate has been shifted towards warmer and drier regimes, mainly due to anthropogenic warming [1,2]. Climate changes can notably disrupt the environment and ecosystems. To evaluate ... During the 20th century the global climate has been shifted towards warmer and drier regimes, mainly due to anthropogenic warming [1,2]. Climate changes can notably disrupt the environment and ecosystems. To evaluate the impacts of climate change on ecoregions, the Kdppen-Trewartha (K-T) climate classification [3] is widely used because it was constructed on the basis of surface vegetation. The K-T classification system combines temperature, precipitation, and their seasonality into a single metric. Six major climate types and several sub-climate types are defined (A: tropical, B: dry, C: subtropical, D: temperate, E: subpolar, F: polar). Each K-T climate type is consistent with certain prevalent plant species. Definitions and criteria of K-T climate types were outlined by Feng et al.[4]. 展开更多
关键词 CLIMATE HAS been shifted CHANGE on ECOREGIONS CLIMATE types
Asymmetric response of the eastern tropical Indian SST to climate warming and cooling 预览
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作者 Shan Xu Yiyong Luo Fukai Liu 《海洋学报:英文版》 SCIE CAS CSCD 2019年第5期76-85,共10页
The response of the eastern tropical Indian Ocean(ETIO)to heat fluxes of equal amplitude but opposite sign is investigated using the Community Earth System Model(CESM).A significant positive asymmetry in sea surface t... The response of the eastern tropical Indian Ocean(ETIO)to heat fluxes of equal amplitude but opposite sign is investigated using the Community Earth System Model(CESM).A significant positive asymmetry in sea surface temperature(SST)is found over the ETIO—the warming responses to the positive forcing exceeds the cooling to the negative forcing.A mixed layer heat budget analysis is carried out to identify the mechanisms responsible for the SST asymmetry.Results show that it is mainly ascribed to the ocean dynamical processes,including vertical advections and diffusion.The net surface heat flux,on the contrary,works to reduce the asymmetry through its shortwave radiation and latent heat flux components.The former is due to the nonlinear relationship between SST and cloud,while the latter is resulted mainly from Newtonian damping and air-sea stability effects.Changes in the SST skewness are also evaluated,with more enhanced negative SST skewness over the ETIO found for the cooling than heating scenarios due to the asymmetric thermocline-SST feedback. 展开更多
关键词 TROPICAL INDIAN Ocean SST asymmetry CLIMATE warming CLIMATE COOLING negative SST SKEWNESS
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当前气候、古气候和生境异质性对中国常绿阔叶木本植物生物地理格局的影响
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作者 许玥 沈泽昊 +2 位作者 应凌霄 臧润国 蒋有绪 《地理学报:英文版》 SCIE CSCD 2019年第7期1142-1158,共17页
Understanding biogeographic patterns and the mechanisms underlying them has been a main issue in macroecology and biogeography, and has implications for biodiversity conservation and ecosystem sustainability. Evergree... Understanding biogeographic patterns and the mechanisms underlying them has been a main issue in macroecology and biogeography, and has implications for biodiversity conservation and ecosystem sustainability. Evergreen broad-leaved woody plants(EBWPs) are important components of numerous biomes and are the main contributors to the flora south of 35°N in China. We calculated the grid cell values of species richness(SR) for a total of 6265 EBWP species in China, including its four growth-forms(i.e., tree, shrub, vine, and bamboo), and estimated their phylogenetic structure using the standardized phylogenetic diversity(SPD) and net relatedness index(NRI). Then we linked the three biogeographical patterns that were observed with each single environmental variable representing the current climate, the last glacial maximum(LGM)–present climate variability, and habitat heterogeneity, using ordinary least squares regression with a modified t-test to account for spatial autocorrelation. The partial regression method based on a general linear model was used to decompose the contributions of current and historical environmental factors to the biogeographical patterns observed. The results showed that most regions with high numbers of EBWP species and phylogenetic diversity were distributed in tropical and subtropical mountains with evergreen shrubs extending to Northeast China. Current mean annual precipitation was the best single predictor. Topographic variation and its effect on temperature variation was the best single predictor for SPD and NRI. Partial regression indicated that the current climate dominated the SR patterns of Chinese EBWPs. The effect of paleo-climate variation on SR patterns mostly overlapped with that of the current climate. In contrast, the phylogenetic structure represented by SPD and NRI was constrained by paleo-climate to much larger extents than diversity, which was reflected by the LGM–present climate variation and topog-raphy-derived habitat heterogeneity in China. Our study highlights the 展开更多
关键词 EVERGREEN broad-leaved WOODY plants species richness standardized PHYLOGENETIC diversity net relatedness index present CLIMATE Quaternary CLIMATE variability HABITAT heterogeneity
Coupling of a Regional Climate Model with a Crop Development Model and Evaluation of the Coupled Model across China 预览
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作者 Jing ZOU Zhenghui XIE +4 位作者 Chesheng ZHAN Feng CHEN Peihua QIN Tong HU Jinbo XIE 《大气科学进展:英文版》 SCIE CAS CSCD 2019年第5期527-540,共14页
In this study,the CERES(Crop Estimation through Resource and Environment Synthesis)crop model was coupled with CLM3.5,the land module of the regional climate model RegCM4.The new coupled model was named RegCM4 CERES;a... In this study,the CERES(Crop Estimation through Resource and Environment Synthesis)crop model was coupled with CLM3.5,the land module of the regional climate model RegCM4.The new coupled model was named RegCM4 CERES;and in this model,crop type was further divided into winter wheat,spring wheat,spring maize,summer maize,early rice,late rice,single rice,and other crop types based on each distribution fraction.The development of each crop sub-type was simulated by the corresponding crop model separately,with each planting and harvesting date.A simulation test using RegCM4 CERES was conducted across China from 1999 to 2008;a control test was also performed using the original RegCM4.Data on crop LAI(leaf area index),soil moisture at 10 cm depth,precipitation,and 2 m air temperature were collected to evaluate the performance of RegCM4 CERES.The evaluation provided comparison of single-station time series,regional distributions,seasonal variations,and statistical indices for RegCM4 CERES.The results revealed that the coupled model had an excellent ability to simulate the phonological changes and spatial variations in crops.The consideration of dynamic crop development in RegCM4 CERES corrected the wet bias of the original RegCM4 over North China and the cold bias over South China.However,the degree of improvement was minimal and the statistical indices for RegCM4 CERES were roughly the same as the original RegCM4. 展开更多
关键词 MODEL EVALUATION MODEL COUPLING CROP development MODEL regional CLIMATE MODEL CLIMATE modeling
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Climate Change in Xingtai City in Recent 56 Years and Its Impact on Climate Productivity 预览
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作者 Shi Hairui Huang Xuening +1 位作者 Xu Shuang Hao Jufei 《气象与环境研究:英文版》 CAS 2019年第3期102-103,共2页
The research aimed to understand the impact of climate change on agricultural production in Xingtai City.According to daily rainfall and temperature data in Xingtai City during 1954-2018,change characteristics of clim... The research aimed to understand the impact of climate change on agricultural production in Xingtai City.According to daily rainfall and temperature data in Xingtai City during 1954-2018,change characteristics of climate productivity in Xingtai City were analyzed by using Thornthwaite Memorial model,Mann-Kendall mutation test and linear trend analysis.The results showed that change amplitude of climate productivity with rainfall was obviously larger than that with temperature,and it was affected significantly by rainfall.According to change characteristics and trend of rainfall and temperature,it tended to warm and wet climate in Xingtai City in the future,which was favorable for improvement of crop yield.Additionally,there was still room for greater growth in grain production. 展开更多
关键词 CLIMATE PRODUCTIVITY Temperature RAINFALL WARM and WET CLIMATE
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气候变化计量经济学方法研究进展
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作者 李承政 李旭辉 顾海英 《城市与环境研究》 CSSCI 2019年第1期95-111,共17页
全球气候变化是人类社会共同关注的一个热点问题。然而,目前国内对气候变化经济学方法论的研究并不多见。首先,界定了天气、气候、天气效应和气候效应等几个气候变化经济学的基本概念,并介绍了利用天气变化识别气候变化效应的科学理论... 全球气候变化是人类社会共同关注的一个热点问题。然而,目前国内对气候变化经济学方法论的研究并不多见。首先,界定了天气、气候、天气效应和气候效应等几个气候变化经济学的基本概念,并介绍了利用天气变化识别气候变化效应的科学理论基础。然后,介绍了气候经济学领域比较常用的计量经济学方法及其在实证研究中的应用,具体包括生产函数法、特征价格法等截面数据分析方法,固定效应模型、分布滞后模型、非线性模型和交互项方法等面板数据分析方法,以及以长期平均法、长期差分法为代表的混合分析方法。文章还进一步对这些分析方法的特色和优缺点进行了比较。最后,对气候变化计量经济研究方法的发展现状进行了简要评述并指出未来值得研究拓展的方向。 展开更多
关键词 气候 天气 气候变化效应 识别 实证方法
Dynamical downscaling of regional climate: A review of methods and limitations
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作者 Zhongfeng XU Ying HAN Zongliang YANG 《中国科学:地球科学英文版》 SCIE EI CAS CSCD 2019年第2期365-375,共11页
The traditional dynamical downscaling (TDD) method employs continuous integration of regional climate models (RCM) with the general circulation model (GCM) providing the initial and lateral boundary conditions. Dynami... The traditional dynamical downscaling (TDD) method employs continuous integration of regional climate models (RCM) with the general circulation model (GCM) providing the initial and lateral boundary conditions. Dynamical downscaling simulations are constrained by physical principles and can generate a full set of climate information, providing one of the important approaches to projecting fine spatial-scale future climate information. However, the systematic biases of climate models often degrade the TDD simulations and hinder the application of dynamical downscaling in the climate-change related studies. New methods developed over past decades improve the performance of dynamical downscaling simulations. These methods can be divided into four groups: the TDD method, the pseudo global warming method, dynamical downscaling with GCM bias corrections, and dynamical downscaling with both GCM and RCM bias corrections. These dynamical downscaling methods are reviewed and compared in this paper. The merits and limitations of each dynamical downscaling method are also discussed. In addition, the challenges and potential directions in progressing dynamical downscaling methods are stated. 展开更多
关键词 Global circulation MODEL BIAS correction REGIONAL CLIMATE MODEL DOWNSCALING Projection of REGIONAL CLIMATE
Study on the Impact of Climate Engineering on Extreme Rainfall Intensity in China from 2010 to 2099 预览
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作者 Kong Feng 《气象与环境研究:英文版》 CAS 2019年第3期48-56,60共10页
In the context of global climate change and rapid urbanization,climate governance has become one of the unavoidable challenges of human society.Therefore,climate engineering is increasingly mentioned in the internatio... In the context of global climate change and rapid urbanization,climate governance has become one of the unavoidable challenges of human society.Therefore,climate engineering is increasingly mentioned in the international climate negotiations.For solar radiation management with the most controversy in climate engineering method,based on two scenarios of climate engineering (G4) and non climate engineering (RCP4.5) of BNU-ESM model,95% and 99% percentiles of daily rainfall data during 2010-2099 were taken as thresholds of heavy rainfall and extreme rainfall events.The data of over threshold sampling (POT) were fitted by Weibull distribution to diagnose the heavy rainfall and extreme rainfall in 10,20,50 and 100 years of return period.The results showed that:in two scenarios,strength of heavy rainfall and extreme rainfall enhanced with return period increased,and they showed a southeast high-northwest low spatial characteristics.Climate engineering,in general,contributes to the increase in heavy rainfall and extreme rainfall in China,as well as spatial heterogeneity,which represents the suppression of heavy rainfall and extreme rainfall in parts of the country.This research is of great significance for the future global climate control and regional climate adaptation. 展开更多
关键词 CLIMATE ENGINEERING EXTREME RAINFALL RETURN period CLIMATE change Regional difference China
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Addressing Climate Change Vulnerability in Alaska Native Villages Through Indigenous Community Knowledge 预览
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作者 Elizaveta Barrett Ristroph 《社会学研究:英文版》 2019年第1期1-19,共19页
From a Western standpoint, Alaska Native Villages (ANVs) and other indigenous groups have a particular vulnerability to climate change. At the same time, these groups may be seen by themselves and Westerners as having... From a Western standpoint, Alaska Native Villages (ANVs) and other indigenous groups have a particular vulnerability to climate change. At the same time, these groups may be seen by themselves and Westerners as having particular knowledge that can help them adapt to climate change. This paper explores how ANVs are vulnerable to climate change and considers factors such as colonization that aggravate this vulnerability. It then explores how indigenous community knowledge may reduce vulnerability and facilitate adaptation and resilience. It concludes that indigenous community knowledge alone is insufficient to support adaptation and resilience, given the degree of social, political, and climate change, so long as Western institutions privilege Western science over other forms of knowledge. That said, indigenous community knowledge should inform agency decision-making and development projects and may serve as cultural capital that can support resilience. The desire to use indigenous knowledge may be a proxy for a larger issue—the need to include indigenous communities in decision-making about climate change. 展开更多
关键词 Alaska NATIVE VILLAGES ndigenous KNOWLEDGE CLIMATE change ADAPTATION VULNERABILITY
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城市化对南京气候影响的数值模拟研究 预览
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作者 赵酉龙 周顺武 +3 位作者 郑丹 罗俊伟 廖镜彪 刘璞 《气象与环境科学》 2019年第2期1-9,共9页
利用MODIS下垫面资料和NCEP-FNL再分析资料,采用四层嵌套,通过WRF(Weather Research and Forecasting Modeling System)模式,模拟研究了城市化对南京气候的影响。结果表明:城市土地利用类型的改变使下垫面热力、动力属性发生改变,影响... 利用MODIS下垫面资料和NCEP-FNL再分析资料,采用四层嵌套,通过WRF(Weather Research and Forecasting Modeling System)模式,模拟研究了城市化对南京气候的影响。结果表明:城市土地利用类型的改变使下垫面热力、动力属性发生改变,影响了地表与大气之间的动量和热量交换,进而对局地气候特征产生影响。城市化后南京城市热岛效应明显增强,1月和7月2m气温有明显增加的趋势,边界层高度分别增加了约60m和180m 。土地利用类型改变使地表粗糙度增加,1月和7月地面风速分别减小了1.1m·s^-1和0.7m·s^-1 ,并且地面辐合得到加强。城市化使城市地区的中雨和大雨发生概率增加而小雨发生概率减少,中雨和大雨天数最大分别增加约8天和4天。 展开更多
关键词 城市化 南京 气候 WRF
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Assessing the relative role of climate change and human activities in desertification of North China from 1981 to 2010
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作者 Duanyang XU Alin SONG +2 位作者 Dajing LI Xue DING Ziyu WANG 《地球科学前沿:英文版》 SCIE CAS CSCD 2019年第1期43-54,共12页
Desertification is a severe environmental problem induced by both climate change and human activities.This study assessed the relative contribution of climate change,human activities,and different climatic and anthrop... Desertification is a severe environmental problem induced by both climate change and human activities.This study assessed the relative contribution of climate change,human activities,and different climatic and anthropogenic factors in desertification reversion and expansion of North China from 1981 to 2010.The results showed that the desertification of North China had changed significantly over the past 30 years;desertification reversion and expansion covered an area of 750,464 km^2, and the spatial distribution of these regions exhibited considerable heterogeneity.For desertification reversion, climate change and human activity accounted for 22.6% and 26%,respectively of total reverted land.Wind speed reduction and the improvement ofhydrothermal conditions were the most important climatic factors for desertification reversion in the arid region of Northwest China (ARNC) and the Three-River Headwaters region (TRHR),and the reduction in grassland use intensity was the most important anthropogenic factor related to desertification reversion in Inner Mongolia and regions along the Great Wall (IMGW). For desertification expansion,the relative role of climate change was more obvious,which was mainly attributed to the continuous reduction in precipitation in eastern IMGW, and the increase in grassland use intensity was the main factor underlying regional human-induced desertification expansion. 展开更多
关键词 DESERTIFICATION climate change human activity RELATIVE ROLE North China
区域气候变化对西藏扎布耶、当雄错、班戈湖变化的影响
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作者 王云生 郑绵平 +2 位作者 闫丽娟 卜令忠 齐文 《地理学报:英文版》 SCIE CSCD 2019年第11期1895-1907,共13页
The lake hydrological and meteorological data of the Tibetan Plateau are not rich.This research reports the observed climatic data and measured water levels of saline lakes from the local meteorological stations in th... The lake hydrological and meteorological data of the Tibetan Plateau are not rich.This research reports the observed climatic data and measured water levels of saline lakes from the local meteorological stations in the Zabuye salt lake,the Dangqiong Co salt lake and the Bankog Co salt lake in recent two decades.Combining with satellite remote sensing maps,we have analyzed the changes of the water level of these three lakes in recent years and discussed the origins of the changes induced by the meteorological factors.The results show that the annual mean temperature and the water level reflect a general ascending trend in these three lakes during the observation period.The rising rates of the annual mean temperature were 0.08℃/yr during 1991–2014 and 0.07℃/yr during 2004–2014,and of the water level,were 0.032 m/yr and 0.24 m/yr,respectively.Analysis of changes of the meteorological factors shows the main cause for the increase of lake water quantity are the reduced lake evaporation and the increased precipitation in the lake basins by the rise of average temperature.Seasonal variation of lake water level is powered largely by the supply of lake water types and the seasonal change of regional climate. 展开更多
关键词 TIBETAN PLATEAU SALINE LAKE CLIMATE variation LAKE change
川西平原土壤微生物生物量碳氮磷含量特征及其影响因素分析 预览
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作者 吴晓玲 张世熔 +2 位作者 蒲玉琳 徐小逊 李云 《中国生态农业学报(中英文)》 CAS CSCD 北大核心 2019年第10期1607-1616,共10页
本文通过区域调查采样和统计分析,探讨了川西平原土壤微生物生物量碳(MBC)、土壤微生物生物量氮(MBN)和土壤微生物生物量磷(MBP)含量特征及其对气候、海拔、母质和土地利用等因素的响应,揭示了其关键影响因素,以期为川西平原地区土壤质... 本文通过区域调查采样和统计分析,探讨了川西平原土壤微生物生物量碳(MBC)、土壤微生物生物量氮(MBN)和土壤微生物生物量磷(MBP)含量特征及其对气候、海拔、母质和土地利用等因素的响应,揭示了其关键影响因素,以期为川西平原地区土壤质量管理提供参考。结果表明,不同土壤类型的MBC、MBN和MBP含量表现为冲积土显著高于水稻土、潮土和黄壤(P<0.05),潮土MBC/MBN显著高于水稻土。气候和海拔的影响为:MBC、MBN和MBP含量随着≥0℃积温、≥10℃积温、年均温和年均降水量的增加呈指数减少,而随干燥度和海拔增加呈线性增加。不同成土母质中,MBC、MBN和MBP含量均为灰色冲积物显著高于老冲积物。不同土地利用方式下,三者含量为草地显著高于水田和旱地,水田、旱地和林地差异不显著。皮尔森相关分析和冗余分析表明,MBC和MBN均与≥0℃积温、年均温呈极显著负相关(P<0.01),与海拔呈极显著正相关关系,MBP与母质呈现极显著负相关关系。逐步回归分析表明,MBC主要受年均温、干燥度、年均降水量和母质的影响;MBN主要受海拔、干燥度和年均降水量的综合影响;MBP主要受母质、年均温、≥10℃积温和年均降水量的调控。因此,川西平原土壤MBC、MBN、MBP能灵敏地反映不同采样点气候的变化,可为该区气候变化下土壤碳、氮、磷的响应预测提供参考。 展开更多
关键词 土壤微生物生物量碳 土壤微生物生物量氮 土壤微生物生物量磷 气候 海拔 母质 土地利用
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Climate change induced eutrophication of cold-water lake in an ecologically fragile nature reserve
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作者 Xiaotian Lu Yonglong Lu +7 位作者 DeliangChen Chao Su Shuai Song Tieyu Wang Hanqin Tian Ruoyu Liang Meng Zhang Kifayatullah Khan 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第1期359-369,共11页
Aquatic ecosystem sustainability around the globe is facing crucial challenges because of increasing anthropogenic and natural disturbances.In this study,the Tianchi Lake,a typical cold-water lake and a UNESCO/MAB (Ma... Aquatic ecosystem sustainability around the globe is facing crucial challenges because of increasing anthropogenic and natural disturbances.In this study,the Tianchi Lake,a typical cold-water lake and a UNESCO/MAB (Man and Biosphere)nature reserve located in high latitude and elevation with the relatively low intensity of human activity was chosen as a system to examine the linkages between climate change and eutrophication.As a part of the UNESCO Bogda Man and Biosphere Reserve,Tianchi Lake has been well preserved for prevention from human intervention,but why has it been infected with eutrophication recent years? Our results show that climate change played a significant role in the eutrophication in the Tianchi Lake.Increased temperature,changed precipitation pattern and wind-induced hydrodynamic fluctuations in the summer season were suggested to make a major contribution to the accelerated eutrophication.The results also showed that the local temperature and precipitation changes were closely linked to the large-scale atmospheric circulation,which opens the door for the method to be applied in other regions without local climatic information.This study suggests that there is an urgent need to take into consideration of climate change adaptation into the conservation and management of cold-water lakes globally. 展开更多
关键词 EUTROPHICATION Climate change Atmospheric CIRCULATION ALPINE LAKES
1982-2013年中国植被NDVI空间异质性的气候影响
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作者 高江波 焦珂伟 吴绍洪 《地理学报:英文版》 SCIE CSCD 2019年第10期1597-1609,共13页
Climate change is a major driver of vegetation activity, and thus their complex processes become a frontier and difficulty in global change research. To understand this relationship between climate change and vegetati... Climate change is a major driver of vegetation activity, and thus their complex processes become a frontier and difficulty in global change research. To understand this relationship between climate change and vegetation activity, the spatial distribution and dynamic characteristics of the response of NDVI to climate change were investigated by the geographically weighted regression(GWR) model during 1982 to 2013 in China. This model was run based on the combined datasets of satellite vegetation index(NDVI) and climate observation(temperature and moisture) from meteorological stations nationwide. The results showed that the spatial non-stationary relationship between NDVI and surface temperature has appeared in China: the significant negative temperature-vegetation relationship was located in Northeast, Northwest and Southeast China, while the positive correlation was more concentrated from southwest to northeast. By comparing the normalized regression coefficients from GWR model for different climate factors, it presented the regions with moisture dominants for NDVI were in North China and the Tibetan Plateau, and the areas of temperature dominants were distributed in East, Central and Southwest China, where the annual mean maximum temperature accounted for the largest areas. In addition, regression coefficients from GWR model between NDVI dynamics and climate variability indicated that the higher warming rate could result in the weakened vegetation activity through some mechanisms such as enhanced drought, while the moisture variability could mediate the hydrothermal conditions for the variation of vegetation activity. When the increasing rate of photosynthesis exceeded that of respiration, the positive correlation between vegetation dynamics and climate variability was reflected. However, the continuous and dynamic process of vegetation activity response to climate change will be determined by spatially heterogeneous conditions in climate change and vegetation cover. Furthermore, the dynamic description of clim 展开更多
关键词 NDVI climate change spatial HETEROGENEITY GWR China
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