| 青藏高原隆升对春、夏季亚洲大气环流的影响 |
| |
| 引用本文： | 梁潇云,刘屹岷,吴国雄.青藏高原隆升对春、夏季亚洲大气环流的影响[J].高原气象,2005,24(6):837-845. |
| |
| 作者姓名： | 梁潇云 刘屹岷 吴国雄 |
| |
| 作者单位： | 1. 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,北京,100029;中国科学院,研究生院,北京,100039;国家气候中心,中国气象局气候研究开放实验室,北京,100081
2. 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,北京,100029 |
| |
| 基金项目： | 中国科学院重要方向创新项目（ZKCX2-SW-210）;国家自然科学基金项目（40135020,40375022,40475027）共同资助 |
| |
| 摘 要： | 利用全球大气环流谱模式R42L9，进行了有、无青藏高原大地形两种情况的10年积分，通过两个试验结果的比较，研究了青藏高原大地形对春、夏亚洲大气环流的影响。模拟结果表明：春季，青藏高原大地形对低层西风的阻挡引起了绕流，其北支气流加强了北方冷空气在高原东侧的南下；同时，作为一个弱热源，它的热力作用加强了高原南侧的南支西风气流，为华南地区输送了大量的暖湿空气。冷暖空气的交汇，加强了华南地区春季的降水。夏季，青藏高原强热源的存在，引起的低层气旋性环流，加强了青藏高原东侧的东亚夏季风，使其向北发展。盛夏，青藏高原“感热气泵（SHAP）”在南亚地区上空低层造成了负涡度和辐散异常，使南亚地区的夏季降水减少，南亚夏季风减弱；在对流层上层高原上宅形成负涡源，并通过遥相关加强了伊朗高压。
|
| 关 键 词： | 青藏高原 亚洲 大气环流 春季 夏季 地形隆升 |
| 文章编号： | 1000-0534（2005）06-0837-09 |
| 收稿时间： | 2004-06-15 |
| 修稿时间： | 2005-02-24 |
The Impact of Qinghai-Xizang Plateau Uplift on Asian General Circulation in Spring and Summer |
| |
| LIANG Xiao-yun,LIU Yi-min,WU Guo-xiong.The Impact of Qinghai-Xizang Plateau Uplift on Asian General Circulation in Spring and Summer[J].Plateau Meteorology,2005,24(6):837-845. |
| |
| Authors: | LIANG Xiao-yun LIU Yi-min WU Guo-xiong |
| |
| Institution: | 1. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG |
| |
| Abstract: | To study the effects of the uplift of Qinghai-Xizang Plateau(QXP) on Asian atmospheric general circulation in spring and summer,the experiments with and without QXP are performed respectively(called TP-Experiment and NTP-Experiment hereafter) for 10 years using an atmospheric general circulation model with rhomboidal truncation(R42L9).Comparing the results of TP Experiment with NTP-Experiment,it is showed that the Asian atmospheric general circulation has a strong response to the uplift of QXP.The QXP split the westerlies and force them to flow around it in lower level.There are two branches of the westerlies,one flow to the north and the other to the south of the Plateau.The northern branch strengthen cold air go down southward to Eastern Asia.The intensity of southern branch enhances because of weaken heating of the QXP in spring.The enhanced southern branch transport moisture to southernChina.Meeting of cold and warm air in southern China causes heavy rain in there in spring.In summer,cyclonic circulation caused by the QXP strong heating source in lower level enhances the Eastern Asia summer monsoon on the east side of QXP and make it develop northward.However,the sensible heat air pumping of QXP bring negative vorticity and divergence over southern Asia in lowew level,and decrease the precipitation in there in summer.So the southern Asia summer monsoon weakens with the uplift of QXP.Another thermal influence of the QXP is reflected in upper level.The negative vorticity sources over the Plateau generated by the QXPheatingstrengthen the Iranhigh at 200 hPa in a remote way. |
| |
| Keywords: | Qinghai-Xizang Plateau Asian atmospheric general circulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
