检索结果-南通市图书馆

The diurnal and seasonal characteristics of urban heat island variation in beijing city and surrounding areas and impact factors based on remote sensing satellite data

引用

Science china Earth Sciences 2005年第Z2期48卷 220-229页

作者： ZHANG Jiahua, HOU Yingyu, LI Guicai, YAN Hao YANG Limin & YAO Fengmei The chinese Academy of meteorological Sciences, beijing 100081, china The National meteorological center, beijing 100081, china The National Satellite meteorological center, beijing 100081, china Joint Laboratory for Geoinformation Science, The chinese University of Hong Kong, Hong Kong, china Department of Geosciences, Graduate School of chinese Academy of Sciences, beijing 100039, china The chinese Academy of meteorological Sciences Beijing 100081 China The National meteorological center Beijing 100081 China The National Satellite meteorological center Beijing 100081 China Joint Laboratory for Geoinformation Science The Chinese University of Hong Kong Hong Kong China

Based on the land surface temperature (LST), the land cover classification map,vegetation coverage, and surface evapotranspiration derived from EOS-MODIS satellite data, and by the use of GIS spatial analytic technique and multivariate statistical analysis method, the urban heat island (UHI) spatial distribution of the diurnal and seasonal variabilities and its driving forces are studied in beijing city and surrounding areas in 2001. The relationships among UHI distribution and landcover categories, topographic factor, vegetation greenness, and surface evapotranspiration are analyzed. The results indicate that: (i) The significant UHI occur in beijing city areas in the four seasons due to high heat capacity and multi-reflection of compression building, as well as with special topographic features of its three sides surrounded by mountains,especially in the summer. The UHI spatial distribution is corresponding with the urban geometry structure profile. The LST difference is approximately 4-6℃ between beijing city and suburb areas, comparatively is 8- 10℃ between beijing city area and outer suburb area in northwestern regions. (ii) The UHI distribution and intensity in daytime are different from nighttime in beijing city area, the nighttime UHI is obvious. However, in the daytime, the significant UHI mainly appears in the summer, the autumn takes second place, and the UHI in the winter and the spring seem not obvious. The surface evapotranspiration in suburb areas is larger than that in urban areas in the summer, and high latent heat exchange is evident, which leads to LST difference between city area and suburb area. (iii) The reflection of surface landcover categories is sensitive to the UHI, the correlation between vegetation greenness and UHI shows obviously *** scatterplot shows that there is the negative correlation between NDVI and LST (r2 = 0.6481).The results demonstrate that the vegetation greenness is an important factor for reducing the UHI,and la

关键词： urban heat island, vegetation cover, LST, MODIS, beijing city and surrounding areas.

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

A Two-Moment Bulk Microphysics Coupled with a Mesoscale Model WrF:Model Description and First results

A Two-Moment Bulk Microphysics Coupled with a Mesoscale Mode...

引用

强化科技基础推进气象现代化——第29届中国气象学会年会

作者： Gao Wenhua 1,Zhao Fengsheng 1,Hu Zhijin 2,and Feng Xuan 1 1 National Satellite meteorological center,china meteorological administration,beijing 100081 2 chinese Academy of meteorological Sciences,china meteorological administration,beijing 100081

The chinese Academy of meteorological Sciences(CAMS) two-moment bulk microphysics scheme was adopted in this study to investigate the representation of cloud and precipitation processes under different environmental *** scheme predicts the mixing ratio of water vapor as well as the mixing ratios and number concentrations of cloud droplets,rain,ice,snow,and graupel.A new parameterization approach to simulate heterogeneous droplet activation was developed in this ***,the improved CAMS scheme was coupled with the Weather research and Forecasting model(WrF v3.1),which made it possible to simulate the microphysics of clouds and precipitation as well as the cloud-aerosol interactions in selected atmospheric *** rain event occurring on 27-28 December 2008 in eastern china was simulated using the CAMS scheme and three sophisticated microphysics schemes in the WrF *** showed that the simulated 36-h accumulated precipitations were generally agreed with observations,and the CAMS scheme performed well in the southern area of the nested *** radar reflectivity,the averaged precipitation intensity,and the hydrometeor mixing ratios simulated by the CAMS scheme were generally consistent with those from other microphysics *** hydrometeor number concentrations simulated by the CAMS scheme were also close to the experiential values in stratus *** model results suggest that the CAMS scheme performs reasonably well in describing the microphysics of clouds and precipitation in the mesoscale WrF model.

关键词： droplet activation two-moment bulk microphysics WrF coupling

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Evolution of desertification in a two-dimensional energy balance model coupled with thermodynamics and dynamics

引用

Science china Earth Sciences 2010年第11期53卷 1726-1733页

作者： CHAO Jiping1,2 & LI YaoKun3,4 1National Marine Environmental Forecasting center, beijing 100081, china 2First Institute of Oceanography, State Oceanic administration, Qingdao 266061, china 3State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric physics, chinese Academy of Sciences, beijing 100029, china 4Graduate University of chinese Academy of Sciences, beijing 100049, china National Marine Environmental Forecasting center Beijing China First Institute of Oceanography State Oceanic Administration Qingdao China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Graduate University of chinese Academy of Sciences Beijing China

The relationship between desert evolution and change in albedo has been investigated quasi-analytically using a zonal mean two-dimensional energy balance model which considers the radiation transmission process due to thermodynamics and bound- ary layer movement caused by kinetics. A climate state including temperature, zonal wind, meridional wind and vertical wind can be simulated according to the current zonal distribution of albedo. Given desert distribution, characterized by the value and distribution of albedo, the response of climate on albedo has been studied to analyze the evolution of desert climate. One significant result is that the simple model can reproduce mean meridional circulation. Another result indicates that climate corresponds to two equilibria. This happens when the junction temperature between vegetation and desert is higher than a certain critical value. As for the first equilibrium, the desert belt is predicted to move southward in the northern hemisphere with the increasing values of albedo, which corresponds to the current trend of climate change. For the second equilibrium, vegetation will expand northward with increasing values of albedo, which would indicate a narrowing of the desert belt. In order to determine if the two equilibria exist, new physical models are needed.

关键词： two-dimensional energy balance model desertification two equilibria

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

On linking climate to chinese dynastic change: Spatial and temporal variations of monsoonal rain

引用

chinese Science Bulletin 2010年第1期55卷 77-83页

作者： ZHANG DeEr1, LI Hong-Chun2,3, KU Teh-Lung2,4 & LU LongHua5 1 National Climate center, beijing 100081, china 2 Department of Earth Sciences & research center of Ocean Environment and Technology, Cheng-Kung University, Tainan 70101, Taiwan, china 3 School of Geographical Sciences, Southwest University of china, Chongqing 400715, china 4 Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, USA 5 chinese Academy of meteorological Sciences, beijing 100081, china National Climate center Beijing China Department of Earth Sciences & research center of Ocean Environment and Technology Cheng-Kung University Tainan Taiwan China School of Geographical Sciences Southwest University of China Chongqing China Department of Earth Sciences University of Southern California Los Angeles USA chinese Academy of meteorological Sciences Beijing China

The causal correlation or linkage between the East Asian Monsoon (EAM) intensity and rise/fall of chinese dynasties recently proposed by high-resolution paleoclimate reconstructions is examined in detail. Aside from many exceptions to the correlation, both instrumental and historical climate records show strong spatial variations of rainfall on annual-to-decadal scales over eastern china. The relationship between rainfall and EAM intensity also exhibits regional disparity. These observations suggest: (1) Tak-ing paleo-proxy records from a single locality in eastern china to imply changes in drought/wetness as to affect the cultural and political history of china is fraught with uncertainty. (2) On annual-to-decadal scales, the thesis that δ18O in speleothems can be used as a proxy for the EAM strength lacks empirical underpinnings.

关键词：古气候重建东亚季风强降雨时空变化中国东部地区连接 EAM 高分辨率

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

A preliminary Study on Vegetation Dynamics of china by Using meteorological Satellite Data

引用

chinese Science Bulletin 1993年第3期38卷 221-224,265-268页

作者：符淙斌温刚周嗣松吕杰 Institute of Atmospheric physics Academia Sinica Satellite meteorological center State Meteorological Administration

Vegetation on the earth plays an important role in the processes of the exchange of radiation, heat, moisture, momentum and various gases and particles in the earth-atmosphere system. recently more attention is paid t... 详细信息

关键词： vegetation satellite data

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

基于SSM/I被动微波数据的中国积雪深度遥感研究

引用

山地学报 2008年第1期26卷 59-64页

作者：延昊张佳华中国气象局国家气象中心中国气象科学研究院

通过对积雪和其他地物的被动微波辐射计SSM/I的微波亮温进行波谱分析,提出了一个识别积雪的SSM/I微波检测方法,与MODIS的5d合成积雪范围数据进行了比较,结果表明SSM/I的积雪范围与MODIS基本一致。对提出的SSM/I的微波积雪深度反演方法... 详细信息

通过对积雪和其他地物的被动微波辐射计SSM/I的微波亮温进行波谱分析,提出了一个识别积雪的SSM/I微波检测方法,与MODIS的5d合成积雪范围数据进行了比较,结果表明SSM/I的积雪范围与MODIS基本一致。对提出的SSM/I的微波积雪深度反演方法进行了验证,与2006年冬季每日的中国地面积雪深度观测数据的相关系数r的平方为0.46～0.54,偏差为-0.3～0.8cm,均方根误差rmse为4.4～6.8cm。

关键词：积雪识别积雪深度被动微波辐射计SSM/I MODIS

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The advance and withdraw of the summer monsoon rainy area in western china

引用

Acta Oceanologica Sinica 1988年第S1期 44-55页

作者： Lin Zhiguang Academy of meteorological Science, State meteorological administration, beijing, china

-In this paper, by using the ratio (4%) of the dekad mean precipitation to the annual mean precipitation (1951-1980) as an index of rainy season, the feature of beginning and ending of the rainy season in western Chin... 详细信息

关键词： The advance and withdraw of the summer monsoon rainy area in western china area

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

THE EFFECTS OF MONSOONS AND CONNECTIVITY OF SOUTH china SEA ON THE SEASONAL VArIATIONS OF WATEr EXCHANGE IN THE LUZON STrAIT

引用

Journal of Hydrodynamics 2009年第2期21卷 264-270页

作者： ZHAO Wei HOU Yi-jun QI peng LE Ken-tang LI Ming-kui Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate University of the chinese Academy of Sciences Beijing 100039 China National meteorological center Beijing 100081 China

Seasonal variations of water exchange in the Luzon Strait are studied numerically using the improved princeton Ocean Model （pOM） with a consideration of the effects of connectivity of South china Sea （SCS） and monsoons. The numerical simulations are carried out with the strategy of variable grids, coarse grids for the pacific basin and fine grids for the SCS. It is shown that the Mindoro Strait plays an important role in adjusting the water balance between the pacific and the SCS. The SCS monsoon in summer seasons hinders the entrance of the pacific water into the SCS through the Luzon Strait while the SCS monsoon in winter seasons promotes the entrance of pacific water into the SCS through the Luzon Strait. However, the SCS monsoon does not affect the annual mean Luzon Strait transport, as is mainly determined by the pacific basin wind.

关键词： numerical experiment Kuroshio Luzon Strait transport seasonal variation

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

Dimethyl sulfide in the atmospheric surface layer of the Equatorial pacific Ocean

引用

Acta Oceanologica Sinica 1993年第1期12卷 79-91页

作者： Li Xingsheng F. parungo, C. Nagamoto and S. Hoyt chinese Academy of meteorological Sciences, State meteorological administration, beijing 100081 , china Air resources Laboratory, NOAA/ErL, Boulder, Colorado, U. S. A. Environmental Analytical Service, San Luis Obispo, California, U. S. A. chinese Academy of meteorological Sciences State Meteorological Administration Beijing 100081 China China

This paper reports a case study of atmospheric stability effect on dimethyl sulfide(DMS) concentration in the air. Investigation includes model simulation and field measurements over the pacific Ocean. DMS concentration in surface sea water and in the air were measured during a research cruise from Hawaii to Tahiti. The diurnal variation of air temperature over the sea surface differed from the diurnal cycle of sea surface temperature because of the high heat capacity of sea water. The diurnal cycle of average DMS concentration in the air was studied in relation to the atmospheric stability parameter and surface heat flux. All these parameters had minima at noon and maxima in the early morning. The correlation coefficient of the air DMS concentration with wind speed (at 15 m high) was 0. 64. The observed concentrations of DMS in the equatorial marine surface layer and their diurnal variability agree well with model simulations. The simulated results indicate that the amplitude of the cycle and the mean concentration of DMS are dependent on the atmospheric stratifications and wind speed.

关键词： DMS Dimethyl sulfide in the atmospheric surface layer of the Equatorial pacific Ocean

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

Debating about the climate warming

引用

progress in Natural Science:Materials International 2006年第1期16卷 1-6页

作者： WANG Shaowu1, LUO Yong2, ZHAO Zongci2, DONG Wenje2 and YANG Bao3 (1.Department of Atmospheric Sciences, School of physics, peking University, beijing 100871, china 2. Laboratory for Climate Studies, china meteorological administration, beijing 100081, china 3. Institute of Cold and Arid regions Environmental and Engineering, chinese Academy of Sciences, Lanzhou 730000, china) Department of Atmospheric Sciences School of Physics Peking University Beijing 100871 China

Debating about the climate warming is reviewed. Discussions have focused on the validity of the temperature reconstruction for the last millennium made by Mann et al. Arguments against and for the reconstruction are introduced. Temperature reconstructions by other authors are examined, including the one carried out by Wang et al. in 1996. It is concluded that: (1) Ability of reproducing temperature variability of time scale less than 10 a is limited, so no sufficient evidence proves that the 1990s was the warmest decade, and 1998 was the warmest year over the last millennium. (2) All of the temperature reconstructions by different authors demonstrate the occurrence of the MWp (Medieval Warm period) and LIA (Little Ice Age) in low frequency band of temperature variations, though the peak in the MWp and trough in LIA varies from one reconstruction to the others. Therefore, terms of MWp and LIA can be used in studies of climate change. (3) The warming from 1975 to 2000 was significant, but we do not know if it was the strongest for the last millennium, which needs to be proved by more evidence.

关键词： climate warming MWp LIA the 20th century.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

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：