ISWC OpenIR  > 水保所知识产出(1956---)
苟娇娇; 王飞
Source Publication干旱区地理


Other Abstract

Land-cover change is driven by the natural climate change and human activities.  Meanwhile, the land-cover change has impact on regional climate. The processes of land-cover change affected the regional climate through exchanges of materials (e.g., water) and energy across the land-atmosphere interface, and the processes play an important role in regional ecological construction. In this paper, we conducted two numerical simulations(1980-2014、2005-2014)using Regional Climate model (RegCM) version 4.5, which are driven by ERA-Interim reanalysis data produced by the European Centre for Medium-Range Weather Forecasts(ECMWF). A set of land-cover data with high spatial resolution and timeliness had been built based on the 1:250000 land-use data, the map of vegetation and the map of soil. Then the changes in temperature and precipitation that influenced by the actual land-cover changes was simulated with the land surface process model Biosphere-Atmosphere Transfer Scheme (BATS) in the Loess Plateau. The feedback of land-cover change and the surface energy budget were analyzed on regional climate. The implications from the study are as follows: (1) RegCM4.5 can reproduce the observed annual cycle of mean temperature and precipitation well, as well as the feedback of water-heat conditions under the land-cover change on the Loess Plateau. (2) Land-cover change has stronger impact on precipitation and temperature in summer. The feedback is different under different types of land-cover change. (3) Desertification can lead to increase of the surface albedo, and the decrease of the net absorption of radiation and effective heat flux. Under the environment of high temperature can reach the new balance heat. Green leaves look a lot darker than a bare soil surface. Desertification can lead to decrease of the net absorption of shortwave radiation, and bare soil surface to absorb fewer calories. This region is not easy to form precipitation. In general, desertification can lead to increase of temperatures and decrease of precipitation, which would hinder the natural vegetation recovery. (4) Reclamation will lead to the increase of surface roughness, and to change the wind stress drag coefficient. Further surface will create more turbulence, and the atmosphere will increase more convective activities. This will bring more rainfall. Evaporation taking heat is less than water and field specific heat differences increase in heat, the result is a warming effect. In general, reclamation will lead to increase of temperatures and precipitation in summer, which may cause more drought and flood events. (5) Grassland amplification will lead to decrease of the surface albedo, to be futher raised the net absorption of shortwave radiation. With increase of grass land, the region have increase of soil water content, surface roughness, leaf area index, and evapotranspiration, this leads to marked increase in surface latent heat flux. In general, grassland amplification will lead to decrease of temperatures and precipitation in spring and summer and increase of temperatures and precipitation in autumn and winter. The conclusion can deepen the understanding of the effects of ecological environment change in loess plateau, and the process of reciprocal effects between land-use and climate change. The conclusion provided a reference for selection of regional ecological construction policy.

Keyword区域气候模式 土地覆盖变化 气候反馈 黄土高原
Publication Place新疆
WOS Keyword区域气候模式,土地覆盖变化,气候反馈,黄土高原
Funding Organization中国科学院国际合作局对外合作重点项目(16146KYSB20150001);国家重点基础研究发展计划项目(2014CB954301);欧盟委员会Horizon2020项目(635750);国家重点研发计划黄土高原水土流失治理关键技术集成与模式优化(2016YFC0501707);科技基础性工作专项黄土高原生态系统与环境变化考察课题(2014FY210120)。 ; 中国科学院国际合作局对外合作重点项目(16146KYSB20150001);国家重点基础研究发展计划项目(2014CB954301);欧盟委员会Horizon2020项目(635750);国家重点研发计划黄土高原水土流失治理关键技术集成与模式优化(2016YFC0501707);科技基础性工作专项黄土高原生态系统与环境变化考察课题(2014FY210120)。
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Document Type期刊论文
Corresponding Author王飞
Recommended Citation
GB/T 7714
苟娇娇,王飞. 黄土高原地区土地覆盖变化对气候的反馈作用数值模拟⓪[J]. 干旱区地理,2017,40(4):1-10.
APA 苟娇娇,&王飞.(2017).黄土高原地区土地覆盖变化对气候的反馈作用数值模拟⓪.干旱区地理,40(4),1-10.
MLA 苟娇娇,et al."黄土高原地区土地覆盖变化对气候的反馈作用数值模拟⓪".干旱区地理 40.4(2017):1-10.
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