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Volume 24 Issue 3

May  2007

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2007 >  24(3): 527-537

The Influence of Land Surface Changes on Regional Climate in Northwest China

  • 1.

    International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Western Washington University, Department of Environmental Studies, Huxley College of the Environment, 516 High Street, Bellingham, WA, 98225 Western Washington University, Department of Environmental Studies, Huxley College of the Environment, 516 High


doi: 10.1007/s00376-007-0527-6

  • Land surface changes effect the regional climate due to the complex coupling of land-atmosphere interactions. From 1995 to 2000, a decrease in the vegetation density and an increase in ground-level thermodynamic activity has been documented by multiple data sources in Northwest China, including meteorological, re-analysis from European Centre for Medium-Range Weather Forecasts (ECMWF), National Oceanic and Atmospheric Administration's (NOAA) Advanced Very High Resolution Radiometer (AVHRR) and TIROS Operational Vertical Sounder (TOVS) satellite remote sensing data. As the ground-level thermodynamic activity increases, humid air from the surrounding regions converge toward desert (and semi-desert) regions, causing areas with high vegetation cover to become gradually more arid. Furthermore, land surface changes in Northwest China are responsible for a decrease in total cloud cover, a decline in the fraction of low and middle clouds, an increase in high cloud cover (due to thermodynamic activity) and other regional climatic adaptations. It is proposed that, beginning in 1995, these cloud cover changes contributed to a ``greenhouse" effect, leading to the rapid air temperature increases and other regional climate impacts that have been observed over Northwest China.
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    • Manuscript History

    Manuscript received: 10 May 2007
    Manuscript revised: 10 May 2007
    通讯作者: 陈斌, bchen63@163.com
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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    The Influence of Land Surface Changes on Regional Climate in Northwest China

    • 1. International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Western Washington University, Department of Environmental Studies, Huxley College of the Environment, 516 High Street, Bellingham, WA, 98225 Western Washington University, Department of Environmental Studies, Huxley College of the Environment, 516 High
    • Manuscript received: 2007-05-10
    • Manuscript revised: 2007-05-10

    Abstract: Land surface changes effect the regional climate due to the complex coupling of land-atmosphere interactions. From 1995 to 2000, a decrease in the vegetation density and an increase in ground-level thermodynamic activity has been documented by multiple data sources in Northwest China, including meteorological, re-analysis from European Centre for Medium-Range Weather Forecasts (ECMWF), National Oceanic and Atmospheric Administration's (NOAA) Advanced Very High Resolution Radiometer (AVHRR) and TIROS Operational Vertical Sounder (TOVS) satellite remote sensing data. As the ground-level thermodynamic activity increases, humid air from the surrounding regions converge toward desert (and semi-desert) regions, causing areas with high vegetation cover to become gradually more arid. Furthermore, land surface changes in Northwest China are responsible for a decrease in total cloud cover, a decline in the fraction of low and middle clouds, an increase in high cloud cover (due to thermodynamic activity) and other regional climatic adaptations. It is proposed that, beginning in 1995, these cloud cover changes contributed to a ``greenhouse" effect, leading to the rapid air temperature increases and other regional climate impacts that have been observed over Northwest China.

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