The global response of temperature to high-latitude vegetation greening in a two-dimensional energy balance model  

二维能量平衡模式中高纬度植被绿化的全球温度响应

作　　者：BI Lu HE Yongli HUANG Jianping LI Yaokun GUAN Xiaodan LIU Xiaoyue 

机构地区：[1]Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou,China [2]College of Global Change and Earth System Science,Beijing Normal University,Beijing,China

出　　处：《Atmospheric and Oceanic Science Letters》2020年第1期80-87,共8页大气和海洋科学快报（英文版）

基　　金：This work was jointly supported by the Strategic Priority Research Program of the Chinese Academy of Sciences[grant number XDA2006010301];the National Natural Science Foundation of China[grant numbers 41521004,41705047,and 41875083];the Foundation of the Key Laboratory for Semi-Arid Climate Change of the Ministry of Education in Lanzhou University from the Fundamental Research Funds for the Central Universities[grant numbers lzujbky-2017-bt04 and lzujbky-2017-70];the China 111 Project[grant number B13045].

摘　　要：The relationship between vegetation greening and climate change remains unclear due to its complexity, especially in drylands. Against the background of global warming, arid and semi-arid areas, including mid-latitude deserts, are most sensitive to climate change. In recent decades, the mechanisms underlying the relationship between vegetation greening and climate change have been widely discussed in the literature. However, the influence of vegetation greening in high latitudes on regional climate has not been fully studied. In this paper, a two-dimensional energy balance model was used to study the influence of greening in high latitudes on mid-latitude deserts. The authors found that when greening occurs in high latitudes, the mid-latitude desert recedes at the south boundary, while the polar ice belt and low-latitude vegetation belt both expand. Simultaneously, greening in high latitudes can induce a negative temperature anomaly in northern latitudes and a positive temperature anomaly in southern latitudes. The mid-latitude desert expands at its north and south boundaries until the CO2 concentration reaches 600 ppm(saturated state). The greening in high latitudes could result in a lower global-mean temperature in the ‘saturated’ state, due to the stronger cooling in high latitudes.在全球变暖的背景下,包含中纬度荒漠的干旱地区对气候的变化最为敏感,但高纬度植被绿化对中纬度荒漠地区域的气候影响仍然未知。本研究采用二维能量平衡模式研究高纬度地区植被绿化对中纬度荒漠的影响。研究结果表明,高纬度地区绿化会导致中纬度荒漠南边界后退,极地冰带和低纬度植被带扩大。同时,也会引发高纬度负温度异常和低纬度正温度异常。在CO2浓度增加试验中,中纬度荒漠的南北边界一直在扩展,直到CO2浓度达到600ppm(饱和状态)为止。

关 键 词：High-latitude greening two-dimensional energy balance model mid-latitude desert remote effect global warming 

分 类 号：Q948[生物学—植物学]