欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
通过调查40年东亚地区500hPa平均位势高度场，结果显示东亚夏季高度场发生明显增高，增高主要发生在4-10月和120°E以西的亚欧大陆上，夏季西太平洋副热带高压明显西伸，夏季东亚大槽至少向西移动20个经度，这可能使我国西北降水增加而华北降水减少。另外印度半岛孟加拉湾高度场也有年代际增高趋势。通过公式诊断半球尺度的“极地-赤道”温度梯度减小和东亚大陆尺度的东西温度梯度减小是共同促使这次东亚大槽年代际西移和副热带高压北扩的主要原因。
英文摘要：
The 500 hPa potential height field over East Asia has been investigated. Then outcome shows that averaged 500hPa height increased obviously in the past 40 years in this continent. The increase mainly takes place from April to October and mainly over Eurasia continent of west region less than 120°E. West ridge point of Sub- tropical High over west-north Pacific shifts obviously westward in this period, East Asia Trough displaces at least westward by 20 longitude contemporarily. Therefore, the total precipitation over North China possibly decreases, whereas that of Northwest China possibly increases in the wake of variation happening. In addition, the 500 hPa po- tential height field over Indian peninsula and Bay of Bangladeshalso increase simultaneously also. It is diagnosed through the formulas that those possible chief causes of westward displacement for East Asia Trough as well as for northward expansion of Subtropical High are continent-scale longitudinal Temperature Gradient decreases and the reduction in Equator-Pole Temperature Gradient at hemisphere-scale, respectively.
同期刊论文项目
同项目期刊论文
Assessing the Seasonal Predictability of Summer Precipitation over the Huaihe River Basin with Multi
Evaluation of summer temperature and precipitation predictions from NCEP CFSv2 retrospective forecas
The Influence of Sulfur Dioxide on Dobson Spectrophotometer Total Ozone Measurement: Analysis on the
Changes in Stratospheric ClO and HC Concentrations under Different Greenhouse Gas Emission Scenarios
Application of a Coupled Land Surface-Hydrological Model to Flood Simulation in the Huaihe River Bas
期刊信息
位置：