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Effects of irrigation and vegetation activity on early Indian summer monsoon variability
International journal of climatology, 2009-03, Vol.29 (4), p.573-581
Lee, Eungul
Chase, Thomas N.
Rajagopalan, Balaji
Barry, Roger G.
Biggs, Trent W.
Lawrence, Peter J.
2009
Details
Autor(en) / Beteiligte
Lee, Eungul
Chase, Thomas N.
Rajagopalan, Balaji
Barry, Roger G.
Biggs, Trent W.
Lawrence, Peter J.
Titel
Effects of irrigation and vegetation activity on early Indian summer monsoon variability
Ist Teil von
International journal of climatology, 2009-03, Vol.29 (4), p.573-581
Ort / Verlag
Chichester, UK: John Wiley & Sons, Ltd
Erscheinungsjahr
2009
Link zum Volltext
Quelle
Wiley Online Library Journals Frontfile Complete
Beschreibungen/Notizen
We examined the effects of land cover change over the Indian subcontinent during pre‐monsoon season (March, April, and May—MAM) on early Indian summer monsoon (ISM) rainfall using observed Normalized Difference Vegetation Index (NDVI) and July precipitation for the period of 1982–2003. MAM NDVI anomalies have increased in the Indian subcontinent and the increases are significantly correlated with increases in the irrigated area, not preceding rainfall. July rainfall significantly decreased in central and southern India, and the decrease is statistically related to the increase in the preceding MAM NDVI anomalies. Decreased July surface temperature in the Indian subcontinent (an expected result of increased evapotranspiration due to irrigation and increased vegetation) leads to a reduced land–sea thermal contrast, which is one of the factors driving the monsoon, and therefore weakens the monsoon circulation. A weak early ISM appears to be at least partially a result of irrigation and the resultant increased vegetation and crop activity prior to the monsoon. Copyright © 2008 Royal Meteorological Society
Sprache
Englisch
Identifikatoren
ISSN: 0899-8418
eISSN: 1097-0088
DOI: 10.1002/joc.1721
Titel-ID: cdi_proquest_miscellaneous_20556517
Format
–
Schlagworte
Bgi / Prodig
,
Climatology
,
Climatology. Bioclimatology. Climate change
,
Earth, ocean, space
,
Exact sciences and technology
,
External geophysics
,
Indian summer monsoon
,
irrigation
,
land use/land cover change
,
Meteorology
,
NDVI
,
Physical geography
,
Warm and intertropical climates
,
Water in the atmosphere (humidity, clouds, evaporation, precipitation)
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