Spatial and Temporal Distribution of Accumulated Temperature above 10℃ in Shanxi-Shaanxi-Inner Mongolia Region

doi:10.3969/j.issn.1000-6362.2016.06.001

Abstract

Abstract: The spatial and temporal distribution of accumulated temperature ≥10℃ (AT10) was analyzed by using the multiple linear regression interpolation method, and linear trend line method based on the daily meteorological observed data from 75 meteorological stations in Shanxi province, Shaanxi province, Inner Mongolia autonomous region from 1960 to 2014. The results showed that: (1) from the analysis of whole period, the daily mean air temperature of AT10 increased at the rate of 74.60℃·d·10y-1 in Shanxi-Shaanxi-Inner Mongolia. The accumulated temperature increased obviously in 93% of the meteorological stations (P＜0.05), and only 7% of the meteorological stations was not obvious. (2) From the spatial distribution, AT10 in the whole region decreased with latitude increasing and altitude increasing. (3) From the moving condition of temperature line in each decades, the proportion of ＜1600℃·d, 1600～3200℃·d in the whole area of the region showed a trend of decreasing by decades; the proportion of 3200～4500℃·d in the whole area of the region showed a trend of increasing by decades; the proportion of ＞4500℃·d in the whole area of the region showed a trend of decreasing in 1970s and 1980s, and a trend of increasing in 1990s and 2000-2014. (4) From the change of climate zones between period Ⅰ(1960-1989) to period Ⅱ(1980-2014), a new central subtropical zone appeared obviously, north subtropical zone and warm temperature zone expanded gradually, and middle temperature zone and cold temperature zone narrowed gradually. As a whole, the AT10 showed the trend of expanding towards high latitude and high altitude.

Key words: Shanxi-Shaanxi-Inner Mongolia, The line of accumulated temperature above 10℃, Spatial interpolation, Climate zones

MENG Yan-ling, YIN Shu-yan, YANG Feng, ZHOU Ya-li. Spatial and Temporal Distribution of Accumulated Temperature above 10℃ in Shanxi-Shaanxi-Inner Mongolia Region[J]. Chinese Journal of Agrometeorology, 2016, 37(06): 615-622.

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