检索结果-南通市图书馆

AntarcticaLC2000：The new Antarctic land cover database for the year 2000

Science China earth Sciences 2017年第4期60卷 686-696页

作者： HUI FengMing KANG Jing LIU Yan CHENG Xiao GONG Peng WANG Fang LI Zhan YE YuFang GUO ZiQi State Key Laboratory of Remote Sensing Science College of Global Change and Earth System Science Beijing Normal University Beijing 100875 China Ministry of Education Key Laboratory for earth system modeling Centre for Earth System Science Tsinghua University Beijing 100084 China State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing 100101 China School for the Environment University of Massachusetts Boston Boston MA 02125 USA Institute of Environmental Physics University of Bremen Bremen 28359 Germany Joint Center for Global Change Studies Beijing 100875 China

Antarctica plays a key role in global energy balance and sea level *** has been conventionally viewed as a whole ice body with high albedo in General Circulation Models or Regional Climate Models and the differences of land cover has usually been *** cover in Antarctica is one of the most important drivers of changes in the earth *** land cover information over the Antarctic region is necessary as spatial resolution improves in land process ***,there is a lack of complete Antarctic land cover dataset derived from a consistent data *** fill this data gap,we have produced a database named Antarctic Land Cover Database for the Year 2000(AntarcticaLC2000) using Landsat Enhanced Thematic Mapper Plus(ETM+) data acquired around 2000 and Moderate Resolution Imaging Spectrometer(MODIS) images acquired in the austral summer of 2003/2004 according to the criteria for the 1:*** land cover types were included in this map,separately,ice-free rocks,blue ice,and snow/*** classification legend was determined based on a review of the land cover systems in Antarctica(LCCSA) and an analysis of different land surface types and the potential of satellite *** classification was conducted through a combined usage of computer-aided and manual interpretation methods.A total of 4067 validation sample units were collected through visual interpretation in a stratified random sampling *** overall accuracy of 92.3%and the Kappa coefficient of 0.836 were *** show that the areas and percentages of ice-free rocks,blue ice,and snow/firn are 73268.81 km2(0.537%),225937.26 km2(1.656%),and 13345460.41 km2(97.807%),*** comparisons with other different data proved a higher accuracy of our product and a more advantageous data *** indicate that AntarcticaLC2000,the new land cover dataset for Antarctica entirely derived from satellite data,is a reliable product for a broad spectrum of applicat

关键词： Snowdrift process Air-snow interaction Ice core dating Ultrasonic sounder Post depositional process

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of climate damage in China based on integrated assessment framework

引用

Advances in Climate Change Research 2024年第1期15卷 124-133页

作者： Jie LIU Xiang-Zhen SHI Li YANG Chang-Yi LIU Jin-Cheng WANG Rui-Min ZHU Xue-Li SHI Qiu-Feng LIU International Business School Shanxi Normal UniversityXi'an 710062China University of Chinese Academy of Social Sciences Bejing 102488China School of Economics and Management Xinjiang UniversityUrumqi 830046China Global Energy Interconnection Development and Cooperation Organization(GEIDCO) Bejing 100031China Hubei Enshi College Enshi 445099China CMA earth system modeling and prediction centre China Meteorological AdministrationBeijing 100081China National Climate centre China Meteorological AdministrationBeijing 100081China

Developing a localized and consistent model framework for climate loss and damage assessment is crucial for the policy-making of climate change mitigation and *** study introduces a comprehensive,multidisciplinary Integrated Assessment Model(IAM)framework for evaluating climate damage in China,utilizing BCC-SESM climate model and FUND sectoral climate damage model under the SSP2-RCPs *** a bottom-up approach,the research estimates climate damage across eight major sectors,recalibrates sectoral climate damage functions and parameters for China,and elucidates distinctions among direct climate loss,market climate loss,and aggregate climate *** findings reveal that the total climate damage function for China follows a quadratic pattern in response to temperature *** 2050,the estimated climate damage is projected to be 5.4%,5.7%,and 8.2%of GDP under RCP2.6,RCP4.5,and RCP8.5,***,both direct and market climate losses are projected to remain below 2%of GDP by 2050,while the aggregate climate loss could reach as high as 8.2%,which is predominantly attributed to non-market *** a sectoral perspective,under the RCP8.5 scenario,human health damage constitutes the largest share(61.9%)of the total climate loss by 2050,followed by sea-level rise damage(18.6%).This study sheds lights on the adaptation policy that should attach importance to the non-market sectors,particularly focusing on human health and sea-level rise.

关键词： Climate loss and damage Integrated assessment model(IAM) FUND model Representative concentration pathways(RCPs)scenario BCC-SESM

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of rainfall-induced diabatic heating on southern rainfall-northern haze over eastern China in early February 2023

引用

Science China earth Sciences 2023年第11期66卷 2579-2593页

作者： Xiadong AN Wen CHEN Chun LI Lifang SHENG Weihang ZHANG Shangfei HAI Peng HU Department of Marine Meteorology College of Oceanic and Atmospheric SciencesOcean University of ChinaQingdao 266100China Department of Atmospheric Sciences Yunnan UniversityKunming 650500China Yunnan Key Laboratory of Meteorological Disasters and Climate Resources in the Greater Mekong Subregion Yunnan UniversityKunming 650091China Center for Monsoon system Research Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190China CMA earth system modeling and prediction Center China Meteorological AdministrationBeijing 100081China

In early February 2023,there was severe haze on the North China Plain(NCP)that was contemporaneous with heavy rainfall over southern China,which was known as southern rainfall-northern haze(SR-NH).Based on observational and reanalysis data,the meteorological causes of this SR-NH event are investigated in this study using correlation analysis,dynamic diagnostics and numerical *** results show that the anticyclonic anomaly in the Pacific Northwest(also referred to as the northeast Asian anomalous anticyclone)is responsible for the *** the one hand,this anticyclonic anomaly leads to persistent rainfall over southern China by causing strong ascending motion in conjunction with an anomalous cyclone over the Chinese mainland and transporting large amounts of water vapor *** the other hand,it weakens the climatological northerly winds of the NCP through the southeasterly flow,worsening the horizontal diffusion conditions of ***,the atmospheric stability and relative humidity over the NCP are significantly increased by this anticyclonic *** conditions result in higher PM2.5concentrations over the *** results suggest that this anticyclonic anomaly is related to diabatic heating released by rainfall in southern China,which not only intensifies the rainfall process there(with a contribution of 11.5%)but also induces an anticyclonic anomaly in the upper troposphere of the Pacific Northwest(i.e.,200 hPa).The rainfall-related anticyclonic anomaly reinforces the anticyclonic anomaly in the Pacific Northwest caused by large-scale circulation(with a contribution of 27%)and thus affects haze over the *** study provides a new reference for understanding the contribution of rainfall in southern China to haze over the NCP.

关键词： Rainfall Haze Diabatic heating Anticyclonic anomaly Eastern China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Simultaneous characterization of the atmospheres,surfaces,and exomoons of nearby rocky exoplanets

引用

earth and Planetary Physics 2018年第3期2卷 247-256页

作者： WenLiang Cui JinSu Zhang Frederic Schmidt Duo Cui XiaoMeng Huang Tong Li Feng Tian Ministry of Education Key Laboratory for earth system modeling Department for Earth System ScienceTsinghua University Department of Physics Tsinghua University GEOPS Univ.Paris-SudCNRSUniversité Paris-Saclay

Atmospheric composition is an important indicator of habitability and *** presence or absence of a large exomoon around an earth-size exoplanet could have important consequences for planet climate *** the detection of exomoons and retrieval of information regarding atmospheric composition of earth-size exoplanets are important goals of future exoplanet *** a data analysis method is developed to achieve both goals simultaneously,based on reflection spectra of exoplanet-exomoon *** show that the existence of exomoons,the size of exomoons,and the concentrations of some atomic and molecular species in the atmospheres of their hosting earth-like exoplanets can be retrieved with high levels of *** addition,the method can provide well-constrained fractions of basic surface types on the targets because of the characteristic spectral features of atmospheric species and surface types in the analyzed spectral range.

关键词： exoplanet biosignature exomoon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Meridional deflection of global eddy propagation derived from tandem altimetry: Mechanism and implication

引用

Science China earth Sciences 2024年第3期67卷 811-825页

作者： Ge CHEN Xiaoyan CHEN Frontiers Science Center for Deep Ocean Multispheres and earth system School of Marine TechnologyOcean University of ChinaQindao 266100China Laboratory for Regional Oceanography and Numerical modeling Laoshan LaboratoryQindao 266237China

A common view on meridional deflection of eddy propagation is poleward for cyclones and equatorward for anticyclones. This widely accepted polarity-sensitive pattern has been increasingly undermined given that it is systematically violated on both zonal and regional scales as recently reported. Here, we approach the problem by exploring these violations in terms of eddy effects of spatiotemporal geostrophy, thermal fading, and flow dragging, yielding the following main conclusions.(1) The polarity-dependent deflection discrepancy is a pseudo feature resulting from a biased fit to the normalized eddy tracks which are spatially asymmetric(though azimuthally symmetric) between the two signs;Instead, the primary pattern of eddy deflection appears to be geographically correlated and polarity independent.(2) Geostrophic adjustment plays a critical role in defining the meridional movement of an eddy. Specifically, a consistent poleward(equatorward) trajectory bending of spatially(temporally) ageostrophic eddies is observed irrespective of their polarity.(3) The mechanism of eddy deflection is also determined by its zonal propagation direction. Westward propagating eddies are substantially affected by thermal fading, while opposite ones by flow dragging. A realistic and comprehensive understanding of eddy deflection mechanisms serves as a significant contribution to the prediction of eddy trajectory, and the protection of ocean environment.

关键词： Mesoscale eddies Eddy propagation Eddy meridional deflection Satellite observation Geostrophic adjustment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Estimation of Terrestrial Net Primary Productivity in China from Fengyun-3D Satellite Data

引用

Journal of Meteorological Research 2022年第3期36卷 401-416页

作者： Yonghong LIU Xiuzhen HAN Fuzhong WENG Yongming XU Yeping ZHANG Shihao TANG earth system modeling and prediction Center China Meteorological AdministrationBeijing 100081 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081 National Satellite Meteorological Center China Meteorological AdministrationBeijing 100081 School of Remote Sensing and Geomatics Engineering Nanjing University of Information Science&TechnologyNanjing 210044

Currently,the satellite data used to estimate terrestrial net primary productivity(NPP)in China are predominantly from foreign satellites,and very few studies have based their estimates on data from China’s Fengyun ***,despite their importance,the influence of land cover types and the normalized difference vegetation index(NDVI)on NPP estimation has not been *** study employs the Carnegie–Ames–Stanford approach(CASA)model to compute the fraction of absorbed photosynthetically active radiation and the maximum light use efficiency suitable for the main vegetation types in China in accordance with the finer resolution observation and monitoring-global land cover(FROM-GLC)classification ***,the NPP is estimated from the Fengyun-3D(FY-3D)data and compared with the Moderate Resolution Imaging Spectroradiometer(MODIS)NPP *** FY-3D NPP is also validated with existing research results and historical field-measured NPP *** addition,the effects of land cover types and the NDVI on NPP estimation are *** results show that the CASA model and the FY-3D satellite data estimate an average NPP of 441.2 g C m^(−2) yr^(−1) in 2019 for China’s terrestrial vegetation,while the total NPP is 3.19 Pg C yr^(−1).Compared with the MODIS NPP,the FY-3D NPP is overestimated in areas of low vegetation productivity and is underestimated in high-productivity *** discrepancies are largely due to the differences between the FY-3D NDVI and MODIS *** with historical field-measured data,the FY-3D NPP estimation results outperformed the MODIS NPP results,although the deviation between the FY-3D NPP estimate and the in-situ measurement was large and may exceed 20%at the pixel *** land cover types and the NDVI significantly affected the spatial distribution of NPP and accounted for NPP deviations of 17.0%and 18.1%,***,the total deviation resulting from the two factors reached 29.5%.These results show that

关键词： net primary productivity(NPP) Carnegie-Ames-Stanford approach(CASA)model maximum light use efficiency Fengyun-3D(FY-3D) finer resolution observation and monitoring-global land cover(FROM-GLC)land cover types Moderate Resolution Imaging Spectroradiometer(MODIS)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Parameterization of the freeze/thaw discriminant function algorithm using dense in-situ observation network data

引用

International Journal of Digital earth 2019年第8期12卷 980-994页

作者： Pingkai Wang Tianjie Zhao Jiancheng Shi Tongxi Hu Alexandre Roy Yubao Qiu Hui Lu State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China centre d’Applications et de Recherches en Télédétection(CARTEL) Universitéde SherbrookeSherbrookeCanada Ministry of Education Key Laboratory for earth system modeling Department of Earth System ScienceTsinghua UniversityBeijingPeople’s Republic of China

The near-surface soil freeze–thaw(FT)transition is an important factor affecting land-atmosphere exchanges,hydrology and carbon ***,effectively monitoring the temporal–spatial changes of soil FT processes is crucial to climate change and environment *** approaches have been developed to detect the soil FT state from satellite *** discriminant function algorithm(DFA)uses temperature and emissivity information from Advanced Microwave Scanning Radiometer Enhanced(AMSR-E)passive microwave satellite *** it is well validated,it was shown to be insufficiently robust for all land *** this study,we use in-situ observed soil temperature and AMSR-E brightness temperature to parameterize the DFA for soil FT state *** use the in-situ soil temperature records at 5 cm selected from available dense networks in the Northern Hemisphere as a *** the distinction between ascending and descending orbits,two different sets of parameters were acquired for each frequency *** validation results indicate that the overall discriminant accuracy of the new function can reach 90%.We further compared the Advanced Microwave Scanning Radiometer 2 discriminant results using the new function to the Soil Moisture Active Passive freeze/thaw product,and a reasonable consistency between them was found.

关键词： Soil freeze–thaw state discriminant function algorithm AMSR-E AMSR2 SMAP

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Initial Errors in the Tropical Indian Ocean that Can Induce a Significant “Spring Predictability Barrier” for La Nina Events and Their Implication for Targeted Observations

引用

Advances in Atmospheric Sciences 2021年第9期38卷 1566-1579页

作者： Qian ZHOU Wansuo DUAN Xu WANG Xiang LI Ziqing ZU Key Laboratory of Marine Hazards Forecasting National Marine Environmental Forecasting CenterMinistry of Natural ResourcesBeijing 100081China LASG Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Ministry of Education Key Laboratory for earth system modeling Department for Earth System ScienceTsinghua UniversityBeijing 100084China

Initial errors in the tropical Indian Ocean(IO-related initial errors) that are most likely to yield the Spring prediction Barrier(SPB) for La Ni?a forecasts are explored by using the CESM *** initial errors can be classified into two ***-1 initial error consists of positive sea temperature errors in the western Indian Ocean and negative sea temperature errors in the eastern Indian Ocean,while the spatial structure of Type-2 initial error is nearly *** kinds of IO-related initial errors induce positive prediction errors of sea temperature in the Pacific Ocean,leading to underprediction of La Nina ***-1 initial error in the tropical Indian Ocean mainly influences the SSTA in the tropical Pacific Ocean via atmospheric bridge,leading to the development of localized sea temperature errors in the eastern Pacific ***,for Type-2 initial error,its positive sea temperature errors in the eastern Indian Ocean can induce downwelling error and influence La Ni?a predictions through an oceanic channel called Indonesian *** on the location of largest SPB-related initial errors,the sensitive area in the tropical Indian Ocean for La Nina predictions is ***,sensitivity experiments show that applying targeted observations in this sensitive area is very useful in decreasing prediction errors of La ***,adopting a targeted observation strategy in the tropical Indian Ocean is a promising approach toward increasing ENSO prediction skill.

关键词： initial error tropical Indian Ocean La Nina prediction sensitive area targeted observation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Using a skillful statistical model to predict September sea ice covering Arctic shipping routes

引用

Acta Oceanologica Sinica 2020年第5期39卷 11-25页

作者： Sha Li Muyin Wang Wenyu Huang Shiming Xu Bin Wang Yuqi Bai Ministry of Education Key Laboratory for earth system modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Joint Institute for the Study of the Atmosphere and Ocean University of WashingtonSeattle WA98195USA Pacific Marine Environmental Laboratory National Oceanic and Atmospheric AdministrationSeattle WA98115USA State Key Laboratory of Numerical modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

The rapid decrease in Arctic sea ice cover and thickness not only has a linkage with extreme weather in the midlatitudes but also brings more opportunities for Arctic shipping routes and polar resource exploration,both of which motivate us to further understand causes of sea-ice variations and to obtain more accurate estimates of seaice cover in the ***,a novel data-driven method,the causal effect networks algorithm,is applied to identify the direct precursors of September sea-ice extent covering the Northern Sea Route and Transpolar Sea Route at different lead times so that statistical models can be constructed for sea-ice *** whole study area was also divided into two parts:the northern region covered by multiyear ice and the southern region covered by seasonal *** forecast models of September sea-ice extent in the whole study area(TSIE)and southern region(SSIE)at lead times of 1–4 months can explain over 65%and 79%of the variances,respectively,but the forecast skill of sea-ice extent in the northern region(NSIE)is limited at a lead time of 1 *** lead times of 1–4 months,local sea-ice concentration and sea-ice thickness have a larger influence on September TSIE and SSIE than other teleconnection *** the lead time is more than 4 months,the surface meridional wind anomaly from northern Europe in the preceding autumn or early winter is dominant for September TSIE variations but is comparable to thermodynamic factors for NSIE and *** suggest that this study provides a complementary approach for predicting regional sea ice and is helpful in evaluating and improving climate models.

关键词： regional sea ice Arctic shipping routes machine learning statistical model predictions

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparisons of Soil Moisture Datasets over the Tibetan Plateau and Application to the Simulation of Asia Summer Monsoon Onset

引用

Advances in Atmospheric Sciences 2010年第2期27卷 303-314页

作者：包庆刘屹岷施建成吴国雄 State Key Laboratory of Numerical modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Institute for Computational earth system Science University of California

The influence of soil moisture on Asian monsoon simulation/prediction was less studied, partly due to a lack of available and reliable soil moisture datasets. In this study, we firstly compare several soil moisture datasets over the Tibetan Plateau, and find that the remote sensing products from the Advanced Microwave Scanning Radiometer for earth Observing system （AMSR-E） can capture realistic temporal variations of soil moisture better than the two reanalyses （NCEP and ECMWF） during the pre-monsoon seasons. Using the AMSR-E soil moisture product, we investigate the impacts of soil moisture over the Tibetan Plateau on Asian summer monsoon onset based on a Spectral Atmospheric Model developed at IAP/LASG （SAMIL）. Comparison between results with and without the assimilation of remotely sensed soil moisture data demonstrates that with soil moisture assimilated into SAMIL, the land-sea thermal contrast during pre-monsoon seasons is more realistic. Accordingly, the simulation of summer monsoon onset dates over both the Bay of Bengal and South China Sea regions are more accurate with AMSR-E soil moisture assimilated. This study reveals that the application of the soil moisture remote sensing products in a numerical model could potentially improve prediction of the Asian summer monsoon onset.

关键词： soil moisture remote sensing AMSR-E and ASM onset

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：