| 海陆分布和地形对1998年夏季风爆发的热力影响 |
| |
| 引用本文： | 邵慧,钱永甫.海陆分布和地形对1998年夏季风爆发的热力影响[J].热带气象学报,2001,17(1):45-56. |
| |
| 作者姓名： | 邵慧 钱永甫 |
| |
| 作者单位： | 南京大学大气科学系, |
| |
| 基金项目： | 国家科技部攀登A“南海季风试验研究”和国家自然基金!（49975023） |
| |
| 摘 要： | 应用1980－1995年5天平均的CMAP降水资料、美国NMC850hPa风、卫星反演的向外长波辐射（OLR）和上部对流层水汽亮温（BT）等资料分析比较了南海夏季风爆发前后的基本特征。结果发现：BT能够反映南海夏季风的爆发及其与周围地区降水的关系，但局地降水信息的反映不够具体；OLR能够比较好的反映热带海洋上的降水，但陆地上的低值OLR可能受到地形的影响，仅仅850hPa风场不能完全确定夏季风的爆发。南海季风转换区域定义在南海的中北部比较合适，这是因为南海夏季风爆发前就存在着长年位于南海南部的带海洋对流性雨带；南海夏季风爆发后西南季风气流和季风雨带从印度洋经孟加拉湾和南海伸向西北太平洋，开始了南亚和东亚夏季风的爆发过程。
|
| 关 键 词： | 南海 夏季风 爆发特征 OLR BT 降水资料 时空演化 |
| 文章编号： | 1004-4965（2001）01-0034-11 |
| 收稿时间： | 1999/10/22 0:00:00 |
| 修稿时间： | 1999年11月12 |
THERMAL INFLUENCES OF LAND-SEA CONTRAST AND TOPOGRAPHY ON SUMMER MONSOON OF 1998 |
| |
| SHAO Hui and QIAN Yong-fu.THERMAL INFLUENCES OF LAND-SEA CONTRAST AND TOPOGRAPHY ON SUMMER MONSOON OF 1998[J].Journal of Tropical Meteorology,2001,17(1):45-56. |
| |
| Authors: | SHAO Hui and QIAN Yong-fu |
| |
| Institution: | Department of Atmospheric Sciences, Nanjing University, Nanjing 210093, China;Department of Atmospheric Sciences, Nanjing University, Nanjing 210093, China |
| |
| Abstract: | In this work,the SCSMEX data are used to diagnose and compare the local land-sea thermal conditions and to discuss the possible influences of the thermal forcing of the western Pacific and the Tibetan Plateau on the onset and the development of summer monsoon in 1998. Results show that the distributions of the heat sources are closely related to the land-sea contrast. The topographic blocking leads to the main maximum zones of the heat sources more southward in the areas with the land-sea contrast than in the areas with only oceans. The surface heating is characterized with the apparent seasonal variation and the land-sea difference. The relationship between the western Pacific and the onset of summer monsoon appears in the variations of the surface sea temperature (SST) and the latent heat. The mechanism of the influence of the Tibetan Plateau during the summer monsoon is different: it is characterized by the sensible heating during the South China Sea monsoon and by the condensed latent heating during the Indian monsoon. |
| |
| Keywords: | summer monsoon land-sea contrasttopography thermal influences |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《热带气象学报》浏览原始摘要信息 |
| 点击此处可从《热带气象学报》下载免费的PDF全文 |
