干旱区研究

Arid Zone Research >

2016 , Vol. 33 >Issue 5: 921 - 926

DOI: https://doi.org/10.13866/j.azr.2016.05.02

Climatic Change

Trends of Surface Dry-wet State of Ganjiahu in Xinjiang Based on Humid Index

  • LUO Qing-hong ,
  • NING Hu-sen ,
  • CHEN Qi-min
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  • 1. Institute of Afforestation and Sand Control, Xinjiang Academy of Forestry Sciences, Urumqi 830063, Xinjiang,China;
    2. Xinjiang Institute of Ecology and Geography, Chinese Academic of Sciences, Urumqi 830011, Xinjiang, China;
    3. Northeast Forestry University, Harbin 150040,Heilongjiang, China

Received date: 2015-01-12

  Revised date: 2015-03-30

  Online published: 2025-12-01

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Abstract

The monthly meteorological data were observed during the period of 1953-2013 at Jinghe and Wusu meteorological stations in the Ganjiahu Haloxylon Nature Reserve in Xinjiang, on which the monthly potential evapotranspiration (ET0) and the humidity index (Ia) were calculated by the Ivanov method. The seasonal and annual changes of surface dry/wet conditions and their main impact factors were analyzed. Results showed that the average values of ET0 in winter half year, summer half year and the whole year during the past 60 years were 298 mm, 1 107 mm and 1 407 mm respectively. The ET0 decreased in winter half year but increased in summer half year and the whole year. The Ia decreased in spring and summer but increased in autumn, winter and the whole year. Based on the climate zoning standards related to Ia, the nature reserve is a semiarid region in spring, extremely arid or arid region in summer and autumn, and humid and sub-humid region in winter. Ia was positively correlated with precipitation, vapor pressure and relative humidity, and negatively correlated with wind speed, air temperature and sunshine duration. Ia was influenced maximally by relative humidity, followed by sunshine duration, air temperature, vapor pressure and precipitation, and minimally by wind speed.

Key words： humidity index; potential evapotranspiration; dry/wet conditions; Ganjiahu Haloxylon Nature Reserve; Xinjiang

Cite this article

LUO Qing-hong , NING Hu-sen , CHEN Qi-min . Trends of Surface Dry-wet State of Ganjiahu in Xinjiang Based on Humid Index[J]. Arid Zone Research, 2016 , 33(5) : 921 -926 . DOI: 10.13866/j.azr.2016.05.02

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