Study on Thermal Resources Variation in Zhejiang During 1951-2013
Xiao Jingjing
Guo Fenfen
Li Zhengquan
Ma Hao
Wu Li
Abstract：Based on daily temperature from 1951 to 2013 and the soil temperature from 1971 to 2013 from 71 meteorological stations in Zhejiang province,the change regularity of temperature,surface temperature,agricultural threshold temperature,and other thermal resources and the decadal variation characteristics of thermal resources regionalization in Zhejiang under the background of climate changing were studied in this paper for the full use of climate resources,optimize the structure of agriculture and crop introduction.The study adopted the climatic statistical methods of M-K test and climate tendency rate.The results showed as follows.1) That the four seasons and yearly mean temperatures increased obviously at the rate of 0.24 ℃ · 10a-1 (P0.01),0.10 ℃ · 10a-1 (P0.05),0.14 ℃ · 10a-1 (P0.01),0.14 ℃ · 10a-1 (P0.05) and 0.18 ℃ · 10a-1 (P0.05) during 1951--2013.The initial year of abrupt change is 1997,2005,2002,1993 and 1999.2)The average extreme maximum and minimum temperature increased obviously at the rate of 0.10 ℃ · 10a-1 (P0.01),and 0.30 ℃ · 10a-1 (P0.10) during 1951-2013.3) The soil temperature was closely related to agriculture,while 0-20 cm soil temperature was significantly correlated (P0.01) with daily average temperature.4)The climate warming leaded to the agricultural threshold temperature in Zhejiang (0 ℃,5 ℃,10 ℃,15 ℃,20 ℃),the first day was in advance,the last day delayed,the duration and accumulated temperature were increased.The average climatic tendency of agricultural threshold temperature first day,last day,duration and accumulative temperature were-3.2 to-1.5 d·10a-1,0.3 to 1.6 d·10a-1,2.8 to4.1 d·10a-1 and 95.7 to 107.3 ℃ ·d·10a-1 respectively.5) The first frost day was delayed,the last frost day in advance,frost free period increased,the average climatic tendency were-3.62 d· 10a-1,1.32 d· 10a-1 and 4.97 d · 10a-1.6) The heating resource increased obviously with the global warming,which the ≥10 ℃ accumulative temperature was more than 5600 ℃ · d during 2001 2010 under the line of Chun’ an,Jiande,Pujiang,Yiwu,Zhuji,Shenzhou,Tiantai and Sanmen.
Keywords：thermal resourcesagricultural threshold temperatureagricultural zoningZhejiang
Publication Date：2017-07-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 110-118 )