Surface Freshwater Limitation Explains Worst Rice Production Anomaly in India in 2002

Zampieri, M and Garcia, G C and Dentener, F and Gumma, M K and Salamon, P and Seguini, L and Toreti, A (2018) Surface Freshwater Limitation Explains Worst Rice Production Anomaly in India in 2002. Remote Sensing, 10 (2). pp. 1-19. ISSN 2072-4292

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Abstract

India is the second-most populous country and the second-most important producer of rice of the world. Most Indian rice production depends on monsoon timing and dynamics. In 2002, the lowest monsoon precipitation of the last 130+ years was observed. It coincided with the worst rice production anomaly recorded by FAOSTAT from 1961 to 2014. In that year, freshwater limitation was blamed as responsible for the yield losses in the southeastern coastal regions. Given the important implication for local food security and international market stability, we here investigate the specific mechanisms behind the effects of this extreme meteorological drought on rice yield at the national and regional levels. To this purpose, we integrate output from the hydrological model, surface, and satellite observations for the different rice cropping cycles into state-of-the-art and novel climate indicators. In particular, we adopt the standardized precipitation evapotranspiration index (SPEI) as an indicator of drought due to the local surface water balance anomalies (i.e., precipitation and evapotranspiration). We propose a new indicator of the renewable surface freshwater availability due to non-local sources, i.e., the standardized river discharge index (SDI) based on the anomalies of modelled river discharge data. We compare these indicators to the soil moisture observations retrieved from satellites. We link all diagnostics to the recorded yields at the national and regional level, quantifying the long-term correlations and the best match of the 2002 anomaly. Our findings highlight the need for integrating non-local surface freshwater dynamics with local rainfall variability to determine the soil moisture conditions in rice fields for yields assessment, modeling, and forecasting.

Item Type: Article
Divisions: Research Program : Innovation Systems for the Drylands (ISD)
CRP: UNSPECIFIED
Uncontrolled Keywords: India; rice; yield; production; SDI; SPEI; European Space Agency—Climate Change Initiative (ESA-CCI); soil moisture; river discharge; climate change; seasonal forecasts
Subjects: Others > GIS Techniques/Remote Sensing
Others > Rice
Others > Water Resources
Others > Indian Agriculture
Depositing User: Mr Ramesh K
Date Deposited: 06 Feb 2018 10:03
Last Modified: 06 Feb 2018 10:03
URI: http://oar.icrisat.org/id/eprint/10417
Official URL: https://doi.org/10.3390/rs10020244
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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