首页|Variations in net primary productivity and its relationships with warming climate in the permafrost zone of the Tibetan Plateau

Variations in net primary productivity and its relationships with warming climate in the permafrost zone of the Tibetan Plateau

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Permafrost degradation triggered by a warming climate induces significant changes in soil conditions,and further contributes to apparent impacts on vegetation.However,much less is known regarding the difference in net primary productivity (NPP) and the relationships between NPP and warming temperature among different vegetation types and various types of permafrost zone on the Tibetan Plateau.Consequently,remotely sensed land surface temperature (LST) and NPP from the MODIS platform were used to investigate the response of vegetation NPP to warming climate,and the correlations were scaled up for the study region.Our results indicated a notable increase of NPP from west to east,and significantly increased annual NPP along with the increased LST from 2000 to 2010 in the permafrost zone of the Tibetan Plateau.Meanwhile,the increased NPP for various vegetation types and in different types of permafrost zone with relation to warming temperature was revealed.NPP in the continuous permafrost zone had the greatest sensitivity to the changing LST,and forest NPP presented the most obvious response.Positive correlations between NPP and LST at various scales indicated the enhanced effects of warming LST on vegetation carbon sequestration in the permafrost zone of the Tibetan Plateau.In view of the notable response of NPP to warming temperature on this plateau,remote sensing needs to be further employed to reveal the status of permafrost degradation and its related effects on vegetation.

permafrostnet primary productivity (NPP)land surface temperature (LST)remote sensingthe Tibetan Plateau

MAO Dehua、LUO Ling、WANG Zongming、ZHANG Chunhua、REN Chunying

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Key Laboratory of Wetland Ecology and Environment,Northeast Institute of Geography and Agroecology,CAS,Changchun 130102,China

International Institute for Earth System Sciences,Nanjing University,Nanjing 210093,China

Key Program of Chinese Academy of SciencesCAS/SAFEA International Partnership Program for Creative Research TeamsResearch Fund from NEGAE,CASNational Natural Science Foundation of China

KZZD-EW-08-02Y2H107100141371403

2015

10.1007/s11442-015-1213-8

地理学报(英文版)
中国地理学会,中国科学院地理科学与资源研究所

地理学报(英文版)

CSTPCDCSCDSCI
影响因子：1.307
ISSN：1009-637X
年,卷(期)：2015.25(8)
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