The impacts of permafrost change on NPP and implications: A case of the source regions of Yangtze and Yellow Rivers

This paper studies the relationship between net primary productivity (NPP) and annual average air temperature (GT) at 0cm above ground in permafrost regions by using revised Chikugo NPP model, cubic spline interpolating functions, and nonlinear regression methods. The source regions of the Yangtze a...

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Bibliographic Details
Published in:Journal of Mountain Science
Main Authors: Fang Yiping, Qin Dahe, Ding Yongjian, Yang Jianping, Xu Keyan
Format: Article in Journal/Newspaper
Language:English
Published: 2011
Subjects:
The Source Regions Of Yangtze And Yellow Rivers
Permafrost
Ground Temperature (Gt)
Net Primary Productivity (Npp)
Policy Adaptation
Science & Technology
Life Sciences & Biomedicine
Environmental Sciences & Ecology
QINGHAI-TIBET PLATEAU
BOREAL FOREST
CLIMATE
REGIME
ALASKA
LAYER
Environmental Sciences
permafrost
Alaska
Online Access:http://ir.imde.ac.cn/handle/131551/5508
https://doi.org/10.1007/s11629-011-1004-3
Description
Summary:This paper studies the relationship between net primary productivity (NPP) and annual average air temperature (GT) at 0cm above ground in permafrost regions by using revised Chikugo NPP model, cubic spline interpolating functions, and nonlinear regression methods. The source regions of the Yangtze and Yellow Rivers were selected as the research areas. Results illustrate that: (1) There is significant non-linear relationship between NPP and GT in various typical years; (2) The maximum value of NPP is 6.17, 5.87, 7.73, and 5.41 DM center dot t center dot hm(-2)center dot a(-1) respectively, and the corresponding GT is 7.1, 10.0, 21.2, and 8.9A degrees C respectively in 1980, 1990, 2000 and 2007; (3) In 1980, the sensitivity of NPP to GT is higher than in 1990, 2000 and 2007. This tendency shows that the NPP presents change from fluctuation to an adaptation process over time; (4) During 1980 similar to 2007, the accumulated NPP was reduced to 8.05, and the corresponding carrying capacity of theoretical livestock reduced by 11%; (5) The shape of the demonstration region of ecological compensation system, livelihood support system, and science appraisal system in the source regions of Yangtze and Yellow Rivers are an important research for increasing the adaptation capacity and balancing protection and development.

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