检索结果-南通市图书馆

The Interannual Variability of East Asian Monsoon and Its Relationship with SST in a coupled Atmosphere-Ocean-Land climate model

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2000年第1期17卷 31-47页

作者：王会军 Laboratory for Numerical modeling of Atmospheric Science and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing

Based on a 200 year simulation and reanalysis data (1980–1996), the general characteristics of East Asian monsoon (EAM) were analyzed in the first part of the paper. It is clear from this re-search that the South Asian monsoon (SAM) defined by Webster and Yang (1992) is geographically and dynamically different from the East Asian monsoon (EAM). The region of the monsoon defined by Webster and Yang (1992) is located in the tropical region of Asia (40–110°E, 10–20°N), including the Indian monsoon and the Southeast Asian monsoon, while the EAM de-fined in this paper is located in the subtropical region of East Asia (110–125°E, 20–40°N). The components and the seasonal variations of the SAM and EAM are different and they characterize the tropical and subtropical Asian monsoon systems respectively. A suitable index (EAMI) for East Asian monsoon was then defined to describe the strength of EAM in this paper. In the second part of the paper, the interannual variability of EAM and its relationship with sea surface temperature (SST) in the 200 year simulation were studied by using the composite method, wavelet transformation, and the moving correlation coefficient method. The summer EAMI is negatively correlated with ENSO (El Nino and Southern Oscillation) cycle represented by the NINO3 sea surface temperature anomaly (SSTA) in the preceding April and January, while the winter EAM is closely correlated with the succeeding spring SST over the Pacific in the coupled model. The general differences of EAM between El Nino and La Nina cases were studied in the model through composite analysis. It was also revealed that the dominating time scales of EAM variability may change in the long-term variation and the strength may also change. The anoma-lous winter EAM may have some correlation with the succeeding summer EAM, but this relation-ship may disappear sometimes in the long-term climate variation. Such time-dependence was found in the relationship between EAM and SST in the lon

关键词： East Asian monsoon Interannual variability coupled climate model

Major Modes of Short-Term climate Variability in the Newly Developed NUIST Earth System model(NESM)

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2015年第5期32卷 585-600页

作者： CAO Jian Bin WANG Baoqiang XIANG Juan LI WU Tianjie Xiouhua FU WU Liguang MIN Jinzhong Earth System modeling Center Nanjing University of Information Science and Technology Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science and Technology International Pacific Research Center University of Hawaii at Manoa Department of Atmospheric Sciences University of Hawaii at Manoa NOAA/Geophysical Fluid Dynamics Laboratory Princeton NJ 08540 University Corporation for Atmospheric Research Boulder CO 80307 USA

A coupled earth system model（ESM） has been developed at the Nanjing University of Information Science and Technology（NUIST） by using version 5.3 of the European Centre Hamburg model（ECHAM）, version 3.4 of the Nucleus for European modelling of the Ocean（NEMO）, and version 4.1 of the Los Alamos sea ice model（CICE）. The model is referred to as NUIST ESM1（NESM1）. Comprehensive and quantitative metrics are used to assess the model＇s major modes of climate variability most relevant to subseasonal-to-interannual climate prediction. The model＇s assessment is placed in a multi-model framework. The model yields a realistic annual mean and annual cycle of equatorial SST, and a reasonably realistic precipitation climatology, but has difficulty in capturing the spring–fall asymmetry and monsoon precipitation domains. The ENSO mode is reproduced well with respect to its spatial structure, power spectrum, phase locking to the annual cycle, and spatial structures of the central Pacific（CP）-ENSO and eastern Pacific（EP）-ENSO; however, the equatorial SST variability,biennial component of ENSO, and the amplitude of CP-ENSO are overestimated. The model captures realistic intraseasonal variability patterns, the vertical-zonal structures of the first two leading predictable modes of Madden–Julian Oscillation（MJO）, and its eastward propagation; but the simulated MJO speed is significantly slower than observed. Compared with the T42 version, the high resolution version（T159） demonstrates improved simulation with respect to the climatology, interannual variance, monsoon–ENSO lead–lag correlation, spatial structures of the leading mode of the Asian–Australian monsoon rainfall variability, and the eastward propagation of the MJO.

关键词： coupled climate model earth system model climate variability

Multi-model Projection of July–August climate Extreme Changes over China under CO_2 Doubling. Part I: Precipitation

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2011年第2期28卷 433-447页

作者：李红梅冯蕾周天军 State Key Laboratory of Numerical modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Potential changes in precipitation extremes in July–August over China in response to CO 2 doubling are analyzed based on the output of 24 coupled climate models from the Twentieth-Century climate in coupled models （20C3M） experiment and the 1% per year CO 2 increase experiment （to doubling）（1pctto2x） of phase 3 of the coupled model Inter-comparison Project （CMIP3）. Evaluation of the models’ performance in simulating the mean state shows that the majority of models fairly reproduce the broad spatial pattern of observed precipitation. However, all the models underestimate extreme precipitation by ～50%. The spread among the models over the Tibetan Plateau is ～2–3 times larger than that over the other areas. models with higher resolution generally perform better than those with lower resolutions in terms of spatial pattern and precipitation amount. Under the 1pctto2x scenario, the ratio between the absolute value of MME extreme precipitation change and model spread is larger than that of total precipitation, indicating a relatively robust change of extremes. The change of extreme precipitation is more homogeneous than the total precipitation. Analysis on the output of Geophysical Fluid Dynamics Laboratory coupled climate model version 2.1 （GFDL-CM2.1） indicates that the spatially consistent increase of surface temperature and water vapor content contribute to the large increase of extreme precipitation over contiguous China, which follows the Clausius–Clapeyron relationship. Whereas, the meridionally tri-polar pattern of mean precipitation change over eastern China is dominated by the change of water vapor convergence, which is determined by the response of monsoon circulation to global warming.

关键词： extreme precipitation projection coupled climate model CO2 doubling

同方期刊数据库

Nonlinear changes in cold spell and heat wave arising from Arctic sea-ice loss

在线全文

学校读者我要写书评

暂无评论

Advances in climate Change Research 2021年第4期12卷 553-562页

作者： SONG Mi-Rong WANG Shao-Yin ZHU Zhu LIU Ji-Ping Institute of Atmospheric Physics Chinese Academy of SciencesBeijing100029China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519000China School of Geospatial Engineering and Science Sun Yat-sen UniversityZhuhai519000China University Corporation for Polar Research Zhuhai519000China Department of Atmospheric and Environmental Sciences University at AlbanyState University of New YorkAlbany12222USA

Whether Arctic sea-ice loss has significant impacts on climate extremes in mid-and high-latitudes remains *** we show the full response of cold and warm extremes under two Arctic sea-ice loss scenarios utilizing a coupled global climate model that permits the air-sea *** results show that the amount of Arctic sea-ice loss determines the spatial extent and magnitude of the weakening of atmospheric circulation in mid-and high-latitudes of the northern hemisphere,leading to nonlinear changes in cold and warm extremes.A relatively localized and moderate weakening of atmospheric circulation induced by the projected sea-ice loss in the next two decades would contribute to less winter cold extremes over the Northern Hemispheric *** risks of winter cold spells would be dramatically reduced as the amount of sea-ice loss is increased to the ice-free *** contrast,as sea-ice loss increases,the continental regions would have increased risk of heat waves over all mid-and high-latitudes.

关键词： Arctic sea ice Cold and warm extremes coupled climate model

A Robustness Analysis of CMIP5 models over the East Asia-Western North Pacific Domain

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

Engineering 2017年第5期3卷 773-778页

作者： Tianjun Zhou Xiaolong Chen Bo Wu Zhun Guo Yong Sun Liwei Zou Wenmin Man Lixia Zhang Chao He State Key Laboratory of Numerical modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

The coupled model Intercomparison Project （CMIP） is an international community-based infrastructure that supports climate model intercomparison, climate variability, climate prediction, and climate projection. Improving the performance of climate models over East Asia and the western North Pacific has been a challenge for the climate-modeling community. In this paper, we provide a synthesis robustness analysis of the climate models participating in CMIP-Phase 5 （CMIP5）. The strengths and weaknesses of the CMIP5 models are assessed from the perspective of climate mean state, interannual variability, past climate change during the mid-Pliocene （MP） and the last millennium, and climate projection. The added values of regional climate models relative to the driving global climate models are also assessed. Although an encouraging increase in credibility and an improvement in the simulation of mean states, interannual variability, and past climate changes are visible in the progression from CMIP3 to CMIPS, some previously noticed biases such as the ridge position of the western North Pacific subtropical high and the associated rainfall bias are still evident in CMIP5 models. Weaknesses are also evident in simulations of the interannual amplitude, such as El Nino- Southern Oscillation （ENSO）-monsoon relationships. coupled models generally show better results than standalone atmospheric models in simulating both mean states and interannual variability. Multi-model intercomparison indicates significant uncertainties in the future projection of climate change, although precipitation increases consistently across models constrained by the Clausius-Clapeyron relation. Regional ocean-atmosphere coupled models are recommended for the dynamical downscaling of climate change oroiections over the East Asia-western North Pacific domain.

关键词： East Asian monsoon Western North Pacific climate El Nino-Southern Oscillation Past climate change climate projection coupled climate model Regional climate model

Simulation of climate Change Induced by CO_2 Increasing for East Asia with IAP/ LASG GOALS model

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

Advances in Atmospheric Sciences 2001年第1期18卷 53-66页

作者：郭裕福俞永强刘喜迎张学洪 LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing

Two simulations, one for the control run and another for the perturbation run, with a global coupled ocean-atmosphere-land system model (IAP/LASG GOALS version 4) have been carried out to study the global warming, with much detailed emphasis on East Asia. Results indicate that there is no climate drift in the control run and at the time of CO, doubling the global temperature increases about 1.65 degreesC. The GOALS model is able to simulate the observed spatial distribution and annual cycles of temperature and precipitation for East Asia quite well. But, in general, the model underestimates temperature and overestimates rainfall amount for regional annual average. For the climate change in East Asia, the temperature and precipitation in East Asia increase 2.1 degreesC and 5% respectively, and the maximum warming occurs at middle-latitude continent and the maximum precipitation increase occurs around 25 degreesN with reduced precipitation in the tropical western Pacific.

关键词： climate change simulation coupled climate model East Asia

Evaluation of Arctic sea ice simulation of CMIP6 models from China

在线全文

学校读者我要写书评

暂无评论

Advances in Polar Science 2022年第3期33卷 220-234页

作者： LI Jiaqi WANG Xiaochun WANG Ziqi ZHAO Liqing WANG Jin School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing 210014China

Nine coupled climate models from China participating in the coupled model Intercomparison Project Phase 6(CMIP6)were evaluated in terms of their capability in ensemble historical Arctic sea ice simulation in the context of 56 CMIP6 *** evaluated these nine models using satellite observations from 1980 to *** evaluation was conducted comprehensively using 12 metrics covering different aspects of the seasonal cycle and long-term trend of sea ice extent(SIE)and sea ice concentration(SIC).The nine Chinese modelstended to overestimate SIE,especially in March,and underestimate its long-term decline *** was less spread in model skill in reproducing the spatial pattern of March SIC than in reproducing the spatial pattern of September *** error of March SIC simulation was distributed at the margins of sea ice cover,such as in the Nordic Seas,the Barents Sea,the Labrador Sea,the Bering Sea,and the Sea of ***,the error of September SIC was distributed both at the margins of sea ice cover and in the central part of the Arctic *** of these nine models had capabilities comparable with the majority of the CMIP6 models in reproducing the seasonal cycle and long-term trend of Arctic sea ice.

关键词： coupled climate model CMIP6 Arctic sea ice

Representation of the Arctic Oscillation in the CMIP5 models

在线全文

学校读者我要写书评

暂无评论

Advances in climate Change Research 2013年第4期4卷 242-249页

作者： ZUO Jin-Qing LI Wei-Jing REN Hong-Li Chinese Academy of Meteorological Sciences Laboratory for climate Studies National Climate CenterChina Meteorological Administration

The temporal variability and spatial pattern of the Arctic Oscillation(AO)simulated in the historical experiment of26 coupled climate models participating in the coupled model Intercomparison Project Phase 5(CMIP5)are *** analysis of the monthly AO index indicates that 23 out of the 26 CMIP5 models exhibit no statistically significant spectral peak in the historical experiment,as seen in the *** models are able to reproduce the AO pattern in the sea level pressure anomaly field during boreal winter,but the intensity of the AO pattern tends to be overestimated in all the *** zonal-mean zonal wind anomalies associated with the AO is dominated by a meridional dipole in the mid-high latitudes of the Northern Hemisphere during boreal winter,which is well reproduced by only a few *** models show significant biases in both strength and location of the dipole compared to the *** considering the temporal variability as well as spatial structures in both horizontal and vertical directions,the MPI-ESM-P model reproduces an AO pattern that resembles the observation the best.

关键词： Arctic Oscillation model evaluation coupled climate model CMIP5

多种代用资料和模型模拟得到的亚洲季风在8.2ka显著气候影响的证据（英文）

在线全文

学校读者我要写书评

暂无评论

地球环境学报 2011年第3期2卷 426-441页

作者： MORRILL Carrie WAGNER Amy J OTTO-BLIESNER Bette L ROSENBLOOM Nan Cooperative Institute for Research in Environmental Sciences University of Colorado NOAA's National Climatic Data Center Paleoclimatology Branch climate and Global Dynamics Division National Center for Atmospheric Research

Given the likelihood of future reductions in the strength of the Atlantic Meridional Overturning Circulation(AMOC),it is important to document how changes in the AMOC have altered climate patterns in the past and to assess the skill of coupled climate models in reproducing these *** past abrupt changes in the AMOC,the 8.2 ka event provides a particularly useful case study because its duration,magnitude of AMOC reduction and background climate state are closest to conditions expected in the *** this research,we present an expanded proxy synthesis of the 8.2 ka event in monsoonal Asia,including new high-resolution lake and bog records,more sites from the East Asia monsoon region and proxies of winter monsoon *** compare proxy evidence with a new simulation of the 8.2 ka event using the Community climate System model version 3(CCSM3) and prescribing North Atlantic freshwater forcing according to the latest *** find clear and objectively-determined evidence for 8.2 ka climate anomalies at nearly all of the fourteen proxy sites,emphasizing the strong and widespread impacts of the event in monsoonal Asia during both summer and winter *** model simulation corroborates that these anomalies,described generally as a weakening of the summer monsoon and strengthening of the winter monsoon,were likely caused by a reduction of the *** of regional anomalies in East Asia reveals some spatial heterogeneity,however,that in the model simulation is caused by contraction of the seasonal migration of the subtropical monsoon *** duration of climate anomalies at 8.2 ka in monsoonal Asia,both in proxy records and the model simulation,generally matches the duration of the event in Greenland ice core δ^(18)O,further supporting a tight connection to the North Atlantic.

关键词： abrupt climate change coupled climate model Atlantic Meridional Overturning Circulation freshwater forcing Holocene