文献类型：期刊文献

英文题名：Mismatch in elevational shifts between satellite observed vegetation greenness and temperature isolines during 2000-2016 on the Tibetan Plateau

作者：An, Shuai[1];Zhu, Xiaolin[2];Shen, Miaogen[3];Wang, Yafeng[3];Cao, Ruyin[4];Chen, Xuehong[5];Yang, Wei[6];Chen, Jin[5];Tang, Yanhong[7,8]

第一作者：安帅

通讯作者：Shen, MG[1];Wang, YF[1]

机构：[1]Beijing Union Univ, Coll Appl Arts & Sci, Beijing, Peoples R China;[2]Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Kowloon, Hong Kong, Peoples R China;[3]Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, CAS Ctr Excellence Tibetan Plateau Earth Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China;[4]Univ Elect Sci & Technol China, Sch Resources & Environm, Chengdu, Sichuan, Peoples R China;[5]Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Fac Geog Sci, Coll Remote Sensing Sci & Engn, Beijing, Peoples R China;[6]Chiba Univ, Ctr Environm Remote Sensing, Chiba, Chiba, Japan;[7]Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China;[8]Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Beijing, Peoples R China

第一机构：北京联合大学应用文理学院

通讯机构：[1]corresponding author), Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, CAS Ctr Excellence Tibetan Plateau Earth Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China.

年份：2018

卷号：24

期号：11

起止页码：5411-5425

外文期刊名：GLOBAL CHANGE BIOLOGY

收录：;Scopus(收录号：2-s2.0-85053828005);WOS:【SCI-EXPANDED(收录号:WOS:000447760300032)】；

基金：Key Research and Development Programs for Global Change and Adaptation, Grant/Award Number: 2017YFA0603604; Key Research Program of Frontier Sciences and Strategic Priority Research Program (A) of the Chinese Academy of Sciences, Grant/Award Number: QYZDB-SSW-DQC025, XDA20050101; National Natural Science Foundation of China, Grant/Award Number: 41571103, 41701378; Top-Notch Young Talents Program of China; Youth Innovation Promotion Association of the Chinese Academy of Sciences, Grant/Award Number: 2015055

语种：英文

外文关键词：climate warming; elevational shift; grassland; Tibetan Plateau; vegetation greenness; velocity

摘要：Climate warming on the Tibetan Plateau tends to induce an uphill shift of temperature isolines. Observations and process-based models have both shown that climate warming has resulted in an increase in vegetation greenness on the Tibetan Plateau in recent decades. However, it is unclear whether the uphill shift of temperature isolines has caused greenness isolines to shift upward and whether the two shifts match each other. Our analysis of satellite observed vegetation greenness during the growing season (May-Sep) and gridded climate data for 2000-2016 documented a substantial mismatch between the elevational shifts of greenness and temperature isolines. This mismatch is probably associated with a lagging response of greenness to temperature change and with the elevational gradient of greenness. The lagging response of greenness may be associated with water limitation, resources availability, and acclimation. This lag may weaken carbon sequestration by Tibetan ecosystems, given that greenness is closely related to primary carbon uptake and ecosystem respiration increases exponentially with temperature. We also found that differences in terrain slope angle accounted for large spatial variations in the elevational gradient of greenness and thus the velocity of elevational shifts of greenness isolines and the sensitivity of elevational shifts of greenness isolines to temperature, highlighting the role of terrain effects on the elevational shifts of greenness isolines. The mismatches and the terrain effect found in this study suggest that there is potentially large micro-topographical difference in response and acclimation/adaptation of greenness to temperature changes in plants. More widespread in situ measurements and fine-resolution remote sensing observations and fine-gridded climate data are required to attribute the mismatch to specific environmental drivers and ecological processes such as vertical changes in community structure, plant physiology, and distribution of species.