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          Institute: MPI für Meteorologie     Collection: Atmosphere in the Earth System     Display Documents



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ID: 525815.0, MPI für Meteorologie / Atmosphere in the Earth System
Precipitation variability over the South Asian monsoon heat flow and associated teleconnections
Authors:Saeed, S.; Mueller, W. A.; Hagemann, S.; Jacob, D.; Mujumdar, M.; Krishnan, R.
Language:English
Date of Publication (YYYY-MM-DD):2011
Title of Journal:Geophysical Research Letters
Volume:38
Sequence Number of Article:L08702
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The present study examines the precipitation variability over the South Asian monsoon heat low region and associated teleconnections using high resolution (T106L31) climate simulations performed with the ECHAM5 model. It is found that an intensification of the heat low in response to enhanced precipitation/convection over northwestern India-Pakistan (NWIP) can induce large-scale circulation anomalies that resemble the northern summer circumglobal teleconnection (CGT) wave-like pattern extending well into the Asian monsoon region. Accordingly the wave-like response to rainfall increase over the heat low region is associated with anomalous ascent over northern China and descent over the South China Sea. Additionally, small but statistically significant lead-lag correlations between the heat low and precipitation over northern China further suggest that the detected signal pertains to the true features of the process. On the other hand, suppressed convection and rainfall over the heat low region do not reveal any significant large-scale circulation anomalies. Copyright 2011 by the American Geophysical Union.
External Publication Status:published
Document Type:Article
Communicated by:Carola Kauhs
Affiliations:MPI für Meteorologie/Atmosphere in the Earth System
MPI für Meteorologie/Land in the Earth System (2005-)
MPI für Meteorologie/IMPRS Earth System Modelling
Identifiers:DOI:10.1029/2011GL046984
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