DOI: 10.1111/gcb.14362
Scopus记录号: 2-s2.0-85050866584
论文题名: Modelled biophysical impacts of conservation agriculture on local climates
作者: Hirsch A.L. ; Prestele R. ; Davin E.L. ; Seneviratne S.I. ; Thiery W. ; Verburg P.H.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 10 起始页码: 4758
结束页码: 4774
语种: 英语
英文关键词: CESM
; climate-effective land management
; CLM
; land-based mitigation
; subgrid-scale influences
; temperature extremes
; tillage
英文摘要: Including the parameterization of land management practices into Earth System Models has been shown to influence the simulation of regional climates, particularly for temperature extremes. However, recent model development has focused on implementing irrigation where other land management practices such as conservation agriculture (CA) has been limited due to the lack of global spatially explicit datasets describing where this form of management is practiced. Here, we implement a representation of CA into the Community Earth System Model and show that the quality of simulated surface energy fluxes improves when including more information on how agricultural land is managed. We also compare the climate response at the subgrid scale where CA is applied. We find that CA generally contributes to local cooling (~1°C) of hot temperature extremes in mid-latitude regions where it is practiced, while over tropical locations CA contributes to local warming (~1°C) due to changes in evapotranspiration dominating the effects of enhanced surface albedo. In particular, changes in the partitioning of evapotranspiration between soil evaporation and transpiration are critical for the sign of the temperature change: a cooling occurs only when the soil moisture retention and associated enhanced transpiration is sufficient to offset the warming from reduced soil evaporation. Finally, we examine the climate change mitigation potential of CA by comparing a simulation with present-day CA extent to a simulation where CA is expanded to all suitable crop areas. Here, our results indicate that while the local temperature response to CA is considerable cooling (>2°C), the grid-scale changes in climate are counteractive due to negative atmospheric feedbacks. Overall, our results underline that CA has a nonnegligible impact on the local climate and that it should therefore be considered in future climate projections. © 2018 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110214
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Environmental Geography Group, Institute for Environmental Studies, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Department of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Brussels, Belgium; Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
Recommended Citation:
Hirsch A.L.,Prestele R.,Davin E.L.,et al. Modelled biophysical impacts of conservation agriculture on local climates[J]. Global Change Biology,2018-01-01,24(10)