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spatialandtemporalchangepatternsofnetprimaryproductivityanditsresponsetoclimatechangeintheqinghaitibetplateauofchinafrom2000to2015
Guo Bing1; Zang Wenqian2; Yang Fei3; Han Baomin1; Chen Shuting1; Liu Yue1; Yang Xiao1; He Tianli1; Chen Xi1; Liu Chunting1; Gong Rui1
2020
Source Publicationjournalofaridland
ISSN1674-6767
Volume12Issue:1Pages:1
AbstractThe vegetation ecosystem of the Qinghai-Tibet Plateau in China, considered to be the ′′natural laboratory′′ of climate change in the world, has undergone profound changes under the stress of global change. Herein, we analyzed and discussed the spatial-temporal change patterns and the driving mechanisms of net primary productivity (NPP) in the Qinghai-Tibet Plateau from 2000 to 2015 based on the gravity center and correlation coefficient models. Subsequently, we quantitatively distinguished the relative effects of climate change (such as precipitation, temperature and evapotranspiration) and human activities (such as grazing and ecological construction) on the NPP changes using scenario analysis and Miami model based on the MOD17A3 and meteorological data. The average annual NPP in the Qinghai- Tibet Plateau showed a decreasing trend from the southeast to the northwest during 2000-2015. With respect to the inter-annual changes, the average annual NPP exhibited a fluctuating upward trend from 2000 to 2015, with a steep increase observed in 2005 and a high fluctuation observed from 2005 to 2015. In the Qinghai-Tibet Plateau, the regions with the increase in NPP (change rate higher than 10%) were mainly concentrated in the Three-River Source Region, the northern Hengduan Mountains, the middle and lower reaches of the Yarlung Zangbo River, and the eastern parts of the North Tibet Plateau, whereas the regions with the decrease in NPP (change rate lower than -10%) were mainly concentrated in the upper reaches of the Yarlung Zangbo River and the Ali Plateau. The gravity center of NPP in the Qinghai-Tibet Plateau has moved southwestward during 2000-2015, indicating that the increment and growth rate of NPP in the southwestern part is greater than those of NPP in the northeastern part. Further, a significant correlation was observed between NPP and climate factors in the Qinghai-Tibet Plateau. The regions exhibiting a significant correlation between NPP and precipitation were mainly located in the central and eastern Qinghai-Tibet Plateau, and the regions exhibiting a significant correlation between NPP and temperature were mainly located in the southern and eastern Qinghai-Tibet Plateau. Furthermore, the relative effects of climate change and human activities on the NPP changes in the Qinghai-Tibet Plateau exhibited significant spatial differences in three types of zones, i.e., the climate change-dominant zone, the human activity-dominant zone, and the climate change and human activity interaction zone. These research results can provide theoretical and methodological supports to reveal the driving mechanisms of the regional ecosystems to the global change in the Qinghai-Tibet Plateau.
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/134598
Collection中国科学院地理科学与资源研究所
Affiliation1.山东理工大学
2.中国科学院遥感与数字地球研究所
3.中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Guo Bing,Zang Wenqian,Yang Fei,et al. spatialandtemporalchangepatternsofnetprimaryproductivityanditsresponsetoclimatechangeintheqinghaitibetplateauofchinafrom2000to2015[J]. journalofaridland,2020,12(1):1.
APA Guo Bing.,Zang Wenqian.,Yang Fei.,Han Baomin.,Chen Shuting.,...&Gong Rui.(2020).spatialandtemporalchangepatternsofnetprimaryproductivityanditsresponsetoclimatechangeintheqinghaitibetplateauofchinafrom2000to2015.journalofaridland,12(1),1.
MLA Guo Bing,et al."spatialandtemporalchangepatternsofnetprimaryproductivityanditsresponsetoclimatechangeintheqinghaitibetplateauofchinafrom2000to2015".journalofaridland 12.1(2020):1.
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