Large-scale summer monsoon rainfall over India and its relation to 850 hPa wind shear

被引：5
作者：
Prasad, V. S.
Hayashi, Taiichi
机构：
[1] Natl Ctr Medium Range Weather Forecasting, Noida 201307, Uttar Pradesh, India
[2] Kyoto Univ, Disaster Prevent Res Inst, Kyoto, Japan
来源：
HYDROLOGICAL PROCESSES | 2007年 / 21卷 / 15期
关键词：
rainfall; monsoon; break period; active period; oscillations; ERA-40; power spectrum;
D O I：
10.1002/hyp.6707
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
The daily variations of the horizontal wind shear at the 850 hPa level between a southern region (5-15 degrees N, 40-80 degrees E; Zone 1) and a northern region (20-30 degrees N, 70-90 degrees E; Zone 2) during the period 1979-2002 were investigated. Investigations revealed that the changes of this wind shear on a daily basis are directly related to the large-scale rainfall over the Indian region during the monsoon season. The wind shear of zonal wind together with Zone 2 is useful for determining active, weak and break periods of the Indian summer monsoon (ISM). Thus, the Horizontal Wind Shear can be used as a dynamical circulation Index (HWSI) for studying ISM variability. Copyright (c) 2007 John Wiley & Sons, Ltd.
引用
收藏
页码：1992 / 1996
页数：5
相关论文
共 26 条
[1]  
ALIKUN, 1998, INT C MONS HYDR CYCL, P222
[2]  
CHATFIELD C, 1980, ANAL TIME SERIES INT, P268
[3]  
CHEN TC, 1993, MON WEATHER REV, V121, P2465, DOI 10.1175/1520-0493(1993)121<2465:TDMOTI>2.0.CO
[4]  
2
[5]   Monsoon precipitation in the AMIP runs [J].
Gadgil, S ;
Sajani, S .
CLIMATE DYNAMICS, 1998, 14 (09) :659-689
[6]  
Gibson J. K., 1997, ECMWF REANALYSIS PRO, V1, P72
[7]  
Goswami BN, 1999, Q J ROY METEOR SOC, V125, P611, DOI 10.1002/qj.49712555412
[8]  
KRISHNAMURTI TN, 1976, J ATMOS SCI, V33, P1937, DOI 10.1175/1520-0469(1976)033<1937:OOAMSP>2.0.CO
[9]  
2
[10]  
Krishnan K, 2000, J ATMOS SCI, V57, P1354, DOI 10.1175/1520-0469(2000)057<1354:DOBITI>2.0.CO
123