气候变化领域集成服务门户(CCPortal): Impact of climate change on crop suitability in sub-Saharan Africa in parameterized and convection-permitting regional climate models

CCPortal

DOI	10.1088/1748-9326/ab9daf
	Impact of climate change on crop suitability in sub-Saharan Africa in parameterized and convection-permitting regional climate models
	Chapman S.; E Birch C.; Pope E.; Sallu S.; Bradshaw C.; Davie J.; H Marsham J.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	Due to high present-day temperatures and reliance on rainfed agriculture, sub-Saharan Africa is highly vulnerable to climate change. We use a comprehensive set of global (CMIP5) and regional (CORDEX-Africa) climate projections and a new convection-permitting pan-Africa simulation (and its parameterized counterpart) to examine changes in rainfall and temperature and the impact on crop suitability of maize, cassava and soybean in sub-Saharan Africa by 2100 (RCP8.5). This is the first time an explicit-convection simulation has been used to examine crop suitability in Africa. Increasing temperatures and declining rainfall led to large parts of sub-Saharan Africa becoming unsuitable for multiple staple crops, which may necessitate a transition to more heat and drought resistant crops to ensure food and nutrition security. Soybean was resilient to temperature increases, however maize and cassava were not, leading to declines in crop suitability. Inclusion of sensitivity to extreme temperatures led to larger declines in maize suitability than when this was excluded. The results were explored in detail for Tanzania, Malawi, Zambia and South Africa. In each country the range of projections included wetting and drying, but the majority of models projected rainfall declines leading to declines in crop suitability, except in Tanzania. Explicit-convection was associated with more high temperature extremes, but had little systematic impact on average temperature and total rainfall, and the resulting suitability analysis. Global model uncertainty, rather than convection parameterizations, still makes up the largest part of the uncertainty in future climate. Explicit-convection may have more impact if suitability included a more comprehensive treatment of extremes. This work highlights the key uncertainty from global climate projections for crop suitability projections, and the need for improved information on sensitivities of African crops to extremes, in order to give better predictions and make better use of the new generation of explicit-convection models. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Africa; Climate change; Cmip5; Convection-permitting; Cordex; Crop
语种	英语
scopus关键词	Agricultural robots; Climate models; Crops; Drought; Parameterization; Plants (botany); Rain; Uncertainty analysis; Convection simulations; Extreme temperatures; Global climate projections; Increasing temperatures; Rain fed agriculture; Regional climate models; Suitability analysis; Temperature increase; Climate change; cassava; climate change; climate modeling; drought; global change; high temperature; parameterization; simulation; soybean; South Africa; Glycine max; Manihot esculenta; Zea mays
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153714
作者单位	School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; Global Systems Institute, University of Exeter, Exeter, United Kingdom; National Centre for Atmospheric Science, United Kingdom
推荐引用方式 GB/T 7714	Chapman S.,E Birch C.,Pope E.,et al. Impact of climate change on crop suitability in sub-Saharan Africa in parameterized and convection-permitting regional climate models[J],2020,15(9).
APA	Chapman S..,E Birch C..,Pope E..,Sallu S..,Bradshaw C..,...&H Marsham J..(2020).Impact of climate change on crop suitability in sub-Saharan Africa in parameterized and convection-permitting regional climate models.Environmental Research Letters,15(9).
MLA	Chapman S.,et al."Impact of climate change on crop suitability in sub-Saharan Africa in parameterized and convection-permitting regional climate models".Environmental Research Letters 15.9(2020).