Influences of increasing temperature on Indian wheat: quantifying limits to predictability
Influences of increasing temperature on Indian wheat: quantifying limits to predictability
复制标题
气温升高对印度小麦的影响:可预测性的量化限制
DOI:
10.1088/1748-9326/8/3/034016
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发表时间:
2013
影响因子:
6.7
通讯作者:
Koehler A
中科院分区:
文献类型:
--
作者:
Koehler A
As climate changes, temperatures will play an increasing role in determining crop yield. Both climate model error and lack of constrained physiological thresholds limit the predictability of yield. We used a perturbed-parameter climate model ensemble with two methods of bias-correction as input to a regional-scale wheat simulation model over India to examine future yields. This model configuration accounted for uncertainty in climate, planting date, optimization, temperature-induced changes in development rate and reproduction. It also accounts for lethal temperatures, which have been somewhat neglected to date. Using uncertainty decomposition, we found that fractional uncertainty due to temperature-driven processes in the crop model was on average larger than climate model uncertainty (0.56 versus 0.44), and that the crop model uncertainty is dominated by crop development. Simulations with the raw compared to the bias-corrected climate data did not agree on the impact on future wheat yield, nor its geographical distribution. However the method of bias-correction was not an important source of uncertainty. We conclude that bias-correction of climate model data and improved constraints on especially crop development are critical for robust impact predictions.
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DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
D. Lobell;M. Burke
通讯作者:
D. Lobell;M. Burke
影响因子:
6.2
作者:
Hawkins, Ed;Osborne, Thomas M.;Challinor, Andrew J.
通讯作者:
Challinor, Andrew J.
影响因子:
11.6
作者:
Poulter, Benjamin;Aragao, Luiz;Cramer, Wolfgang
通讯作者:
Cramer, Wolfgang
影响因子:
6.4
作者:
Sacks, William J.;Deryng, Delphine;Ramankutty, Navin
通讯作者:
Ramankutty, Navin
影响因子:
6.2
作者:
J. Ramirez;A. Challinor
通讯作者:
A. Challinor