摘要
To mitigate the impacts of land degradation and achieve sustainable development,several large-scale conservation programs including the Key Shelterbelt Construction Program,Natural Forest Conservation Program,and the Grain to Green Program have been formulated into action in China since the late 1970s and 1998,respectively[1].Recent satellite observations from 2000 to 2017 revealed a strikingly prominent greening in China due to these efforts[2].
2000~2017年,卫星观测数据表明中国部分地区经历了显著的地表植被变绿,揭示植被变绿对气候和环境的影响势在必行.但当前粗分辨率的全球气候模式研究表明,植被变绿对中国夏季气候的影响不显著,因此本文采用高分辨率的陆-气耦合区域气候模式评估了中国植被变绿对东亚区域气候的影响及其生物地球物理机制.研究结果表明,中国植被变绿降低了近地表气温,以中国北方最显著.通过与中国过去十几年观测到的气温变化进行比较表明,观测到的植被变绿在中国北方能够在一定程度上抵消全球变暖的影响.植被变绿同时也改变了东亚夏季风降水格局,特别是中国"北旱南涝"的不均衡分布.植被变绿能够显著增加中国北方夏季的降雨,这与近十几年观测到的北方夏季风降水有所增加基本一致.而在长江以南地区,变绿导致降水少量减少.此外,植被变绿对土壤水资源的影响在文中也作了简要讨论.
作者
Lingxue Yu
Yongkang Xue
Ismaila Diallo
于灵雪;薛永康;Ismaila Diallo(Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,China;Department of Geography,University of California,Los Angeles,CA 90095,USA)
基金
supported by the National Natural Science Foundation of China (41701493, 41601093)
the Scientific and Technological Development Program of Jilin Province (20190103152JH)
the US National Science Foundation (AGS-1849654)
the Chinese Academy of Sciences for funding Lingxue Yu visit to UCLA (University of California, Los Angeles) as a visiting scholar
作者简介
Corresponding author:Yongkang Xue.E-mail address:yxue@geog.ucla.edu(Y.Xue).Yongkang Xue is a full professor at the University of California,Los Angeles.He studies land surface modeling,land/atmosphere/ocean interactions,climate variability,anomalies,and change,regional climate downscaling,and remote sensing.He has been instrumental in the development of five generations of the“SSiB”land surface scheme.Using coupled models,he has conducted numerous sensitivity and prediction studies to investigate the impact of land-surface processes and land/atmosphere/ocean interactions;Lingxue Yu is an assistant researcher at Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences.Her major research interest includes land use and land cover changes,regional climate effects,regional climate models,and remote sensing.
