Blocking highs over Asia and monsoon droughts over India

Blocking highs over Asia and monsoon droughts over India

Severe summer droughts of the Indian subcontinent have been found to accompany prolonged ‘breaks’ in the south-west monsoon. Data from the years of severe drought suggest that the associated breaks were due to upper tropospheric blocking ridges over East Asia. We present here a model for the evoluti...

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Veröffentlicht in:Nature (London) 1981-01, Vol.289 (5795), p.271-273
Hauptverfasser: Raman, C. R. V., Rao, Y. P.
Format: Artikel
Sprache:eng
Schlagworte:
Humanities and Social Sciences
letter
multidisciplinary
Science
Science (multidisciplinary)
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Zusammenfassung:Severe summer droughts of the Indian subcontinent have been found to accompany prolonged ‘breaks’ in the south-west monsoon. Data from the years of severe drought suggest that the associated breaks were due to upper tropospheric blocking ridges over East Asia. We present here a model for the evolution of two such blocking ridges: the East Asia (EABR) and the West Asia (WABR). Apparently an intense WABR—the initiator of the monsoon break—precedes the formation of the EABR. This cycle could be a way of predicting years of intense drought or monsoon activity.
ISSN:0028-0836
1476-4687
DOI:10.1038/289271a0