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Acta Geographica Sinica >

2012 , Vol. 67 >Issue 11: 1443 - 1450

DOI: https://doi.org/10.11821/xb201211001

Variations in January Temperature and 0℃ Isothermal Curve in Qinling Mountains Based on DEM

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  • 1. College of Urban and Environmental Science, Northwest University, Xi'an 710127, China;
    2. Public Meteorological Service Center of China Meteorological Administration, Beijing 100081, China

Received date: 2012-07-16

  Revised date: 2012-08-08

  Online published: 2012-11-20

Supported by

National Science and Technology Foundation of Special Projects, No.2007FY110800

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Abstract

Based on the records of January average temperature during 1959 to 2009 from 39 meteorological sites in the Qinling Mountains, we built the spatial database of January temperature by using space interpolation method based on DEM with the consideration of the influence of terrain factors on the temperature field. Also we extracted the 0℃ isothermal curve and examined the changes in the January average temperature and the 0℃ isothermal curve in the Qinling Mountains during the last 50 years. The January average temperature showed a rising trend at a rate of about 0.2℃/10a, and the 0℃ isothermal curve rose by 143.7 m averagely in the Qinling Mountains during the last 50 years. On longitude, the largest variation in the 0℃ isothermal curve was found in the region of 107°-109°E, where the height increased by 166.2 m during the last 50 years. This value is significantly higher than that in both eastern and western sections of Qinling Mountains; the temporal mutations point for the largest increase in the January temperature was found in 1993. The 0℃ isothermal curve after the mutations point was raised higher by 113.82 m averagely than before.

Key words： Qinling Mountains; January temperature; 0℃ isothermal curve; DEM

Cite this article

BAI Hongying, MA Xinping, GAO Xiang, HOU Qinlei . Variations in January Temperature and 0℃ Isothermal Curve in Qinling Mountains Based on DEM[J]. Acta Geographica Sinica, 2012 , 67(11) : 1443 -1450 . DOI: 10.11821/xb201211001

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