Climate Change and Its Impact on Potential Productivity: In Western Chongqing During 1970-2014

doi:10.11924/j.issn.1000-6850.casb17030110

Abstract

Abstract: In order to study the influence of climate on the productivity of western part of Chongqing, this paper collects the monthly temperature data and rainfall information of 9 counties (including Yongchuan district, Jiangjin district, Hechuan district, Dazu district, Qijiang district, Rongchang district, Tongliang district, Bishan district and Tongnan district) from 1970 to 2014.It analyzes special evolutionary characters of climate resources and climate productivity of agriculture for the last 45 years in western part of Chongqing, together with the possible influence future climate would have on climate productivity. The results showed that during 1970 to 2014, the average temperature of western part of Chongqing was in a significant trend of continuous increase; the annual rainfall volume had been decreasing, with an insignificant tendency;and the average value of climate productivity was slow downward trend, with insignificant changes. Any elements to increase the temperature or rainfall can make climate productivity rising, but the rainfall is the main factors influencing the climate productivity . For the past 45 years, under different climate environment, the comparison of climate productivities are briefly as followed: "cold-wet type"> "warm-dry type">"warm-dry type". Western part of this area has the most average sensitivity of climate productivity towards temperature, while the northern part recorded the most average sensitivity of climate productivity towards rainfall.

CLC Number:

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