Choice of Irrigation Water Management Practice Affects Indian Summer Monsoon Rainfall and Its Extremes
- Indian Inst. of Technology Bombay, Mumbai (India); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Indian Inst. of Technology Bombay, Mumbai (India)
There is an emerging understanding toward the importance of land–atmosphere interactions in the monsoon system, but the effects of specific land and water management practices remain unclear. Here, using regional process–based experiments, we demonstrate that monsoon precipitation is sensitive to the choice of irrigation practices in South Asia. Experiments with realistic representation of unmanaged irrigation and paddy cultivation over north–northwest India exhibit an increase in the late season terrestrial monsoon precipitation and intensification of widespread extreme events over Central India, consistent with changes in observations. Such precipitation changes exhibit substantially different spatial patterns in experiments with a well–managed irrigation system, indicating that increase in unmanaged irrigation might be a factor driving the observed changes in the intraseasonal monsoon characteristics. Furthermore, our findings stress the need for accurate representation of irrigation practices to improve the reliability of earth system modeling over South Asia.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
- Sponsoring Organization:
- Government of India; Natural Environment Research Council (NERC); USDOE Office of Science (SC); National Oceanic and Atmospheric Administration (NOAA)
- Grant/Contract Number:
- AC05-76RL01830; AC05‐00OR22725; AC05-00OR22725
- OSTI ID:
- 1580689
- Alternate ID(s):
- OSTI ID: 1557004; OSTI ID: 1558465
- Report Number(s):
- PNNL-SA-147331; TRN: US2100736
- Journal Information:
- Geophysical Research Letters, Vol. 46, Issue 15; ISSN 0094-8276
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Warming of hot extremes alleviated by expanding irrigation
|
journal | January 2020 |
Warming of hot extremes alleviated by expanding irrigation
|
text | January 2020 |
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