Arid
DOI10.1038/srep46443
Simulated climate effects of desert irrigation geoengineering
Cheng, Wei1; Moore, John C.1; Cao, Long2; Ji, Duoying1; Zhao, Liyun1
通讯作者Moore, John C.
来源期刊SCIENTIFIC REPORTS
ISSN2045-2322
出版年2017
卷号7
英文摘要

Geoengineering, the deliberate large-scale manipulation of earth’s energy balance to counteract global warming, is an attractive proposition for sparsely populated deserts. We use the BNU and UVic Earth system models to simulate the effects of irrigating deserts under the RCP8.5 scenario. Previous studies focused on increasing desert albedo to reduce global warming; in contrast we examine how extending afforestation and ecological projects, that successfully improve regional environments, fair for geoengineering purposes. As expected desert irrigation allows vegetation to grow, with bare soil or grass gradually becoming shrub or tree covered, with increases in terrestrial carbon storage of 90.3 Pg C (UVic-ESCM) - 143.9 Pg C (BNU-ESM). Irrigating global deserts makes the land surface temperature decrease by 0.48 degrees C and land precipitation increase by 100 mm yr(-1). In the irrigated areas, BNU-ESM simulates significant cooling of up to 4.2 degrees C owing to the increases in low cloud and latent heat which counteract the warming effect due to decreased surface albedo. Large volumes of water would be required to maintain global desert irrigation, equivalent 10 mm/year of global sea level (BNU-ESM) compensate for evapotranspiration losses. Differences in climate responses between the deserts prompt research into tailored albedo-irrigation schemes.


类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000399364800001
WOS关键词EARTH SYSTEM MODEL ; LAND-COVER CHANGE ; CARBON SEQUESTRATION ; DUST EMISSION ; AFFORESTATION ; VEGETATION ; DYNAMICS ; RESPONSES ; DROUGHT ; PLANTS
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
来源机构北京师范大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/202299
作者单位1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Joint Ctr Global Change Studies, Beijing 100875, Peoples R China;
2.Zhejiang Univ, Sch Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China
推荐引用方式
GB/T 7714
Cheng, Wei,Moore, John C.,Cao, Long,et al. Simulated climate effects of desert irrigation geoengineering[J]. 北京师范大学,2017,7.
APA Cheng, Wei,Moore, John C.,Cao, Long,Ji, Duoying,&Zhao, Liyun.(2017).Simulated climate effects of desert irrigation geoengineering.SCIENTIFIC REPORTS,7.
MLA Cheng, Wei,et al."Simulated climate effects of desert irrigation geoengineering".SCIENTIFIC REPORTS 7(2017).
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