| 海岸地区TIBL廓线与局地海风环流的数值试验 |
| |
| 引用本文： | 王卫国,蒋维楣.海岸地区TIBL廓线与局地海风环流的数值试验[J].热带气象学报,1998,14(1):63-69. |
| |
| 作者姓名： | 王卫国 蒋维楣 |
| |
| 作者单位： | 中国科学院大气物理研究所 |
| |
| 基金项目： | 国家自然科学基金,KZ951-B1-408项目 |
| |
| 摘 要： | 对三次ＥｌＮｉｎｏ发生前后的ＥＣＭＷＦ资料用滤波方法（带通，低通）进行分析，得到的结果清楚地表明，在ＥｌＮｉｎｏ发生前热带季节内振荡较强，而伴随ＥｌＮｉｎｏ发生，季节内振荡明显减弱，这种能量变化最明显的地区是赤道东太平洋地区；对于周期在９０天以上的热带准定常波，伴随ＥｌＮｉｎｏ的发生其能量明显增加，这种增加反映最显著的区域是从大西洋往西一直到西太平洋。对中纬度（２５－３５°Ｎ）及中高纬度（４０－５０°Ｎ）地区的准定常波能量分析表明，中纬度地区的准定常波能量比低纬大，准定常波能量变化在中纬度（２５－３５°Ｎ）表现出与低纬能量变化一致的情形，即伴随着ＥｌＮｉｎｏ的发生，准定常波能量增加；中高纬度（４０－５０°Ｎ）只在亚洲大陆（１００－１７０°Ｅ）表现出与热带一致的能量变化。结果还显示，热带季节内振荡在低层的东传对赤道西风异常及对ＥｌＮｉｎｏ的发生、发展起着很重要的作用。
|
| 关 键 词： | 厄尔尼诺 季节内振荡 准定常波 大气动力学 |
| 收稿时间： | 7/2/1996 12:00:00 AM |
| 修稿时间： | 1996/11/13 0:00:00 |
NUMERICAL EXPERIMENTS ON THE TIBL PROFILES AND THE LOCAL SEA BREEZE CIRCULATION IN COASTAL AREAS |
| |
| Wang Weiguo and Jiang Weimei.NUMERICAL EXPERIMENTS ON THE TIBL PROFILES AND THE LOCAL SEA BREEZE CIRCULATION IN COASTAL AREAS[J].Journal of Tropical Meteorology,1998,14(1):63-69. |
| |
| Authors: | Wang Weiguo and Jiang Weimei |
| |
| Institution: | Department of Atmospheric Sciences, Nanjing University, Nanjing, 210093;Department of Atmospheric Sciences, Nanjing University, Nanjing, 210093 |
| |
| Abstract: | A two dimensional nonlinear PBL numerical model using an energy closure (E-ε)method has been used to study the sea breeze circulation and TIBL in coastal areas.The main characteristics of sea breeze obtained from numerical experiments agree with those from general observation facts that are summarized by Atkinson(1987).The depth of sea breeze ranges from 300 to 900m, maximum velocity from 1.5 to 4m/s, and the height where max.velocity appears from 100 to 300m.The agreement between comparisons reveals that the performance of model is good,and the chosen experiment conditions are reasonable.This paper refitted the function of TIBL profiles also using the Weisman's relationship,but exponent value is changed with the different states of sea breeze.Many numerial experimental results indicate that the exponent of the TIBL profile,ranging from 0.4 to 1.1,is related with the strength and depth on the sea breeze.The exponent is 0.5 only when sea breeze is fully developed.This paper gives exponents under different sea breeze. |
| |
| Keywords: | Sea breeze circulation TIBL profile Energy closure |
| 本文献已被 CNKI 维普 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 |
|
