共查询到10条相似文献，搜索用时 109 毫秒
1.
The African Climate as Predicted by the IAP Grid-Point Nine-Layer Atmospheric General Circulation Model (IAP-9L-AGCM) 总被引：4，自引：3，他引：4
ＴｈｅＡｆｒｉｃａｎＣｌｉｍａｔｅａｓＰｒｅｄｉｃｔｅｄｂｙｔｈｅＩＡＰＧｒｉｄ－ＰｏｉｎｔＮｉｎｅ－ＬａｙｅｒＡｔｍｏｓｐｈｅｒｉｃＧｅｎｅｒａｌＣｉｒｃｕｌａｔｉｏｎＭｏｄｅｌ（ＩＡＰ－９Ｌ－ＡＧＣＭ）ＣｈｉｎｅｋｅＴｈｅｏＣｈｉｄｉｅｚｉｅ①，... 相似文献
2.
Soon-Il An 《Theoretical and Applied Climatology》2008,91(1-4):77-84
Summary Analysis of both instrumental and proxy climate records indicates the existence of multi-decadal climate variations (about
40–70 years) over the northern hemisphere. A simple model for the midlatitude ocean-atmosphere coupled system is presented
to discuss a possible mechanism for this multi-decadal variation. Slow dynamic adjustments of the ocean due to the Rossby
wave coupled with the meridional heat exchange through the thermal advection in the upper layer of the ocean play an important
role in inducing this multi-decadal oscillation.
Authors’ address: Soon-Il An, Department of Atmospheric Sciences/Global Environmental Laboratory, Yonsei University, 134 Shinchon-dong,
Seodaemu-gu, Seoul 120-749, Korea. 相似文献
3.
GAMIL CliPAS试验对夏季西太平洋副热带高压的预测 总被引：4，自引：0，他引：4
利用GAMIL CliPAS"两步法"季度预测试验,检验了后报的1980～1999年北半球夏季西太平洋副热带高压(简称副高)的年际变化,检查了Seoul National University(SNU)动力统计预测系统对SST预测准确度,并讨论了影响中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室格点大气模式(GAMIL)对副高预测效果的可能原因.500 hPa位势高度可预报性指数表明西太平洋副高具有较高可预报性.集合平均基本能再现西太平洋副高的变率特征,但最大方差的位置和强度与观测稍有区别.观测证据显示,副高存在2～3年变率和3～5年变率.且2～3年变率比3～5年变率强.GAMIL能够准确预测观测副高的3～5年变率,尽管其强度要强于观测.这与试验所用的预测海温能够很好表现赤道中东太平洋(5.5°S～5.5°N,190.5°E～240.5°E)海温的年际变率有关.同时,GAMIL预测的副高2～3年变率较之观测显著偏弱,这可能与SNU预测的海洋大陆地区(5.5°S～0.5°N,110.5°E～130.5°E)SST的2～3年变率偏弱有关.分析表明,SNU预测海温的这种弱点,与SNU海温统计预测模式所用的历史海温(OISST)本身对海洋大陆地区2～3年变率的刻画能力较弱有关. 相似文献
4.
The impact of new physical parametrizations in the Hadley Centre climate model: HadAM3 总被引：16，自引：13，他引：3
Results are presented from the latest version of the Hadley Centre climate model, HadAM3 (Hadley Centre Atmospheric Model
version 3). It represents a significant improvement over the previous version, HadAM2b. This is demonstrated using a series
of ten year integrations with AMIP (Atmospheric Model Intercomparison Project) boundary conditions. The work covers three
aspects of model performance: (1) it shows the improvements in the mean climate in changing from HadAM2b to HadAM3; (2) it
demonstrates that the model now compares well with observations and (3) it isolates the impacts of new physical parametrizations.
Received: 17 August 1998 / Accepted: 20 July 1999 相似文献
5.
基于已建立的三维变分资料同化系统(3D-VAR),利用大气环流模式(IAP9L2°×2.5°-AGCM),对同化和未同化2种初始场分别进行了17a(1988—2004年)的集合回报试验,并对试验结果进行了相关分析.结果表明:在热带地区,2组初始场下的集合回报结果差别很小,除热带外的中高纬地区差别较大,尤其是东亚地区;另外,大部分物理量场的17a异常空间相关系数的均值在同化后的初始场下也得到了提高,可能是因为同化的初始场包含了一段时间的大气信息,动力模式更加协调. 相似文献
6.
为参加第六次国际耦合模式比较计划（CMIP6）和进一步提高模式的模拟能力,大气科学和地球流体力学数值模拟国家重点实验室（LASG）模式团队发展了新一代的格点大气版本的FGOALS-g耦合模式。新版本模式在大气分辨率、海洋网格,以及各分量模式的物理过程等方面都有一定的改进,并正在参与CMIP6最核心的试验以及多个CMIP6模式比较子计划试验。给定CMIP6外强迫,模式在工业革命前参照试验（piControl）和大气模式比较计划（AMIP）试验中模拟的初步结果都比较合理。 相似文献
7.
An effective method was proposed for correcting the seasonal—interannual prediction of the summer climate anomaly. The predictive
skill can be substantially improved by applying the method to the seasonal—interannual prediction carried out by a coupled
ocean—atmosphere model. Thus the method has the potential to improve the operational summer climate predictions.
This research was supported by the National Key Programme for Developing Basic Sciences under Contract G1998040905-2 and the
key project “ The Analytical Study on the Seasonal and Interannual Variability of the General Atmospheric Circulation (1998-2001)”
of National Natural Science Foundation of China under Contract 49735160. 相似文献
8.
地球系统模式是研究全球气候与生态环境变化问题的重要工具，气溶胶与大气化学模式负责为其中的大气环流模式提供与气候效应有关的气态化学物质和气溶胶成分。本文在全球嵌套网格空气质量预报模式系统的基础上发展了一个适用于中国科学院地球系统模式（CAS-ESM）耦合计算的气溶胶与大气化学分量模式（IAP-AACM），采用简化的气相化学机制，不仅考虑了人为气溶胶，同时考虑了海盐、沙尘和二甲基硫等自然气溶胶及其前体物的在线排放。评估结果表明，IAP-AACM氧化剂插值计算可靠，采用简化机制和碳键机制（CBM-Z）模拟的差异较小。和观测的对比表明，得益于CAS-ESM的气溶胶双向反馈作用，简化版能够较好地抓住气溶胶及其前体物的空间分布，为IAP-AGCM提供可靠的气溶胶模拟。另外，简化版能大幅提升计算效率，满足CAS-ESM耦合长期积分的需求。为了在全球气候变化的研究中提供更完善的气溶胶模拟，未来考虑在IAP-AACM中增加氮化学和臭氧平流层化学机制。 相似文献
9.
With the continuing warming due to greenhouse gases concentration, it is important to examine the potential impacts on regional
crop production spatially and temporally. We assessed China’s potential maize production at 50 × 50 km grid scale under climate
change scenarios using modelling approach. Two climate changes scenarios (A2 and B2) and three time slices (2011–2040, 2041–2070,
2071–2100) produced by the PRECIS Regional Climate Model were used. Rain-fed and irrigated maize yields were simulated with
the CERES-Maize model, with present optimum management practices. The model was run for 30 years of baseline climate and three
time slices for the two climate change scenarios, without and with simulation of direct CO2 fertilization effects. Crop simulation results under climate change scenarios varied considerably between regions and years.
Without the CO2 fertilization effect, China’s maize production was predicted to suffer a negative effect under both A2 and B2 scenarios for
all time slices, with greatest production decreases in today’s major maize planting areas. When the CO2 fertilization effect is taken into account, production was predicted to increase for rain-fed maize but decrease for irrigated
maize, under both A2 and B2 scenarios for most time periods. 相似文献
10.
Hindcast Experiment of Extraseasonal Short-Term Summer Climate Prediction over China with RegCM3_IAP9L-AGCM 总被引：1，自引：0，他引：1 
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下载免费PDF全文 The regional climate model RegCM3 has been one-way nested into IAP9L-AGCM,the nine-level atmospheric general circulation model of the Institute of Atmospheric Physics,Chinese Academy of Sciences,to perform a 20-yr(1982-2001)hindcast experiment on extraseaonal short-term prediction of China summer climate.The nested prediction system is referred to as RegCM3_IAP9L-AGCM in this paper.The results show that hindcasted climate fields such as 500-hPa geopotential height,200-and 850-hPa zonal winds from RegCM3_IAP9L-AGCM have positive anomaly correlation coefficients (ACCs) with the observations,andare better than those from the stand-alone IAP9L-AGCM.Except for the 850-hPa wind field,the positive ACCs of the other two fields with observations both pass the 90% confidence level and display a zonal distribution.The results indicate that the positive correlation of summer precipitation anomaly percentage between the nested prediction system and observations covers most parts of China except for downstream of the Yangtze River and north of Northeast and Northwest China.The nested prediction system and the IAP9L-AGCM exhibit different hindcast skills over different regions of China,and the former demonstrates a higher skill over South China than the latter in predicting the summer precipitation. 相似文献