干旱区研究

Arid Zone Research ›› 2018, Vol. 35 ›› Issue (4): 821-829.doi: 10.13866/j.azr.2018.04.09

• Climate andClimatic Resources • Previous Articles     Next Articles

Spatial Difference of Microclimate in Shelterbelts in Newly Reclaimed Land in Jiya Township in Hotan, Xinjiang

MAO Dong-lei1,2,3, CAI Fu-yan4, ZHAO Feng2,3, LEI Jia-qiang2,3, LAI Feng-bing1, XUE Jie2,3   

  1. 1. College of Geographic Science and Tourism,Xinjiang Normal University,Xinjiang Key Laboratory of Lake Environment and Resources in Arid Zone,Urumqi 830054,Xinjiang,China;
    2. Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;
    3. Qira National Station of Observation and Research for Desert-grassland Ecosystem in Xinjiang,Qira 848300,Xinjiang,China;
    4. College of Application Engineering,Urumqi Vocational University,Urumqi 830002,Xinjiang,China
  • Received:2017-05-24 Revised:2017-12-13 Online:2018-07-15 Published:2025-11-18

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Abstract: The purposes of this study were to analyze the spatiotemporal differences of daily wind velocity,air temperature,relative humidity,solar radiation and photosynthetically active radiation in four site types in and out of the shelterbelts in newly reclaimed land in Jiya Township from 13 July to 3 August,2011.Moreover,the differences of daily meteorological factors in four landscape types on a fine day and during a sand-blowing weather were compared.Based on the field observation,the correlation statistical method was used to analyze the spatial differences of microclimatic factors.The results showed that the daily wind velocities at the height of 1 m in the shelterbelts of Populus alba,Calligonum mongolicum and Tamarix ramosissima were reduced by 76.43%,95.85% and 78.74% respectively than that over a sand-shifting land.The wind velocities at the height of 0.5 m were reduced by 78.07%,97.80% and 93.82% respectively than that over sand-shifting land.The vegetation coverages of shelterbelts of P.alba,C.mongolicum and T.ramosissima were 12%,80% and 40% respectively,which revealed that the effects of wind prevention would be better with the increase of vegetation coverage.The wind speed was lower near ground surface.The daily air temperatures in the shelterbelts of P.alba,C.mongolicum and T.ramosissima were decreased by 0.93 ℃,1.31 ℃ and 0.82 ℃ respectively than that over sand-shifting land,and the daily relative humidities were increased by 18.96%,23.34% and 14.78% respectively compared with that over sand-shifting land,which showed that the air temperature could be decreased but the air humidity increased by plants.The change trends of photosynthetically active radiation (PAR) and solar radiation were roughly the same,the maximum value of daily solar radiation occurred over sand-shifting land,and that of daily PAR in C.mongolicum shelterbelt,and both the lowest daily values in the P.alba shelterbelt.The change trends of air temperature on a fine day and during a sand-blowing weather were roughly the same.The variation of relative humidity was significant in the forenoon on fine day,and the relative humidity decreased gradually from sunrise during a sand-blowing weather.In summer,the spatial difference of microclimate in newly reclaimed land was affected by tree species,plant height,vegetation coverage,porosity and distances from shelterbelts.

Key words: microclimate, spatial difference, air temperature, relative humidity, shelterbelt, Jiya Township, Xinjiang