Assessing risks of climate variability and climate change for Indonesian rice agriculture
- 8 May 2007
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 104 (19), 7752-7757
- https://doi.org/10.1073/pnas.0701825104
Abstract
El Niño events typically lead to delayed rainfall and decreased rice planting in Indonesia's main rice-growing regions, thus prolonging the hungry season and increasing the risk of annual rice deficits. Here we use a risk assessment framework to examine the potential impact of El Niño events and natural variability on rice agriculture in 2050 under conditions of climate change, with a focus on two main rice-producing areas: Java and Bali. We select a 30-day delay in monsoon onset as a threshold beyond which significant impact on the country's rice economy is likely to occur. To project the future probability of monsoon delay and changes in the annual cycle of rainfall, we use output from the Intergovernmental Panel on Climate Change AR4 suite of climate models, forced by increasing greenhouse gases, and scale it to the regional level by using empirical downscaling models. Our results reveal a marked increase in the probability of a 30-day delay in monsoon onset in 2050, as a result of changes in the mean climate, from 9–18% today (depending on the region) to 30–40% at the upper tail of the distribution. Predictions of the annual cycle of precipitation suggest an increase in precipitation later in the crop year (April–June) of ≈10% but a substantial decrease (up to 75% at the tail) in precipitation later in the dry season (July–September). These results indicate a need for adaptation strategies in Indonesian rice agriculture, including increased investments in water storage, drought-tolerant crops, crop diversification, and early warning systems.Keywords
This publication has 21 references indexed in Scilit:
- The use of the multi-model ensemble in probabilistic climate projectionsPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2007
- Food for Thought: Lower-Than-Expected Crop Yield Stimulation with Rising CO 2 ConcentrationsScience, 2006
- Using climate models to improve Indonesian food securityBulletin of Indonesian Economic Studies, 2004
- Climate and socio-economic scenarios for global-scale climate change impacts assessments: characterising the SRES storylinesGlobal Environmental Change, 2004
- Effects of climate change on global food production under SRES emissions and socio-economic scenariosGlobal Environmental Change, 2004
- Identification of three dominant rainfall regions within Indonesia and their relationship to sea surface temperatureInternational Journal of Climatology, 2003
- An overview of results from the Coupled Model Intercomparison ProjectGlobal and Planetary Change, 2003
- Constraints on future changes in climate and the hydrologic cycleNature, 2002
- Spatial and Temporal Variations of the Rainy Season over Indonesia and their Link to ENSO.Journal of the Meteorological Society of Japan. Ser. II, 2002
- Portraying climate scenario uncertainties in relation to tolerable regional climate changeClimate Research, 1998