[1]ZHAO Heng-he,GUO Lian-yun,ZHAO Nian-wu,et al.Responses of Initial/Final Date and the Accumulated Temperature Steadily above the Agricultural Threshold Temperature to Climate Change in Gonghe Basin, Qinghai Province[J].Research of Soil and Water Conservation,2012,19(04):207-211.
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Responses of Initial/Final Date and the Accumulated Temperature Steadily above the Agricultural Threshold Temperature to Climate Change in Gonghe Basin, Qinghai Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 04
Page number:
207-211
Column:
Public date:
2012-08-20
- Title:
- Responses of Initial/Final Date and the Accumulated Temperature Steadily above the Agricultural Threshold Temperature to Climate Change in Gonghe Basin, Qinghai Province
- CLC:
- P468.021
- DOI:
- -
- Abstract:
- The data of ground-observed diurnal air temperature were used to compute the initial and final dates of ≥0℃, ≥3℃, ≥5℃, ≥10℃ from 1953 to 2010, as well as the duration days, available accumulative temperature and active accumulative temperature between beginning dates and ending dates, respectively, by using the method of 5 days running mean in Gonghe, Qinghai Province. Furthermore, the tendency of the initial dates, final dates, the available accumulative temperature and active accumulative temperature in recent 60 years were analyzed, and a statistical model was constructed based on the analysis of correlation between these indexes to annual air temperature by the way of Pearson function. The results showed that there were obviously earlier beginning in the initial dates and later ending in the final dates appeared in all of the threshold temperatures, accompanied with this trend, it showed a significantly increasing trend in the duration days, the available accumulative temperature and the active accumulative temperature. It was found that a negative correlation of annual air temperature related to initial dates ≥0℃, ≥3℃, ≥5℃, ≥10℃, and a positive correlation with final dates and the duration days, especially significant at 0.001 level with available accumulative temperature and active accumulative temperature. A simulated test was run on basis of a hypothesis of 1℃ increment of air temperature in the future, it indicated that the initial dates should begin 3～6 d earlier, final dates should end 3~4 d later, the duration days should extend 6~10 d, and the available accumulative temperature and active accumulative temperature should increase 165～190℃ and 164～183℃, respectively.
- References:
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1900-01-01