Relationship between ENSO phases with Northwest India winter precipitation

被引：56

作者：

Dimri, A. P. ^{[1
]}

机构：

[1] Jawaharlal Nehru Univ, Sch Environm Sci, New Delhi 110067, India

来源：

INTERNATIONAL JOURNAL OF CLIMATOLOGY | 2013年 / 33卷 / 08期

关键词：

ENSO; Northwest India; winter Precipitation; western disturbances;

D O I：

10.1002/joc.3559

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Winter (December, January, February and MarchDJFM) precipitation variability over Northwestern India is examined in association with large scale global forcing of El Nino Southern Oscillation (ENSO). During winter, Northwestern India receives precipitation in the form of snow, by eastward moving synoptic weather systemswestern disturbances (WDs). An attempt is made to define relationship between wintertime large scale atmospheric fields with different phases of ENSO. A composite set of El Nino (10 years) and La Nina (8 years) is prepared to analyse role of large scale fields followed by ENSO response with wintertime precipitation over Northwestern India. Significant correlation between the two indicates increased (decreased) precipitation over Northwestern India during warm (cold) phase of ENSO. Higher geopotential height, with stronger southwesterly to northwesterly wind flow suggests more moisture flux from the Caspian and Arabian Sea. Empirical orthogonal function analysis also suggests instance of ENSO impact on Northwest India winter precipitation. Copyright (c) 2012 Royal Meteorological Society

引用

页码：1917 / 1923

页数：7

共 25 条

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