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Oasis cold island effect and its influence on air temperature: a case study of Tarim Basin, Northwest China
  • 时间:0
  • 分类:P941.73[天文地球—自然地理学] TV682[水利工程—水利水电工程]
  • 作者机构:State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Scienees,Urumqi 830011, China
  • 相关基金:Acknowledgements This work was funded by the National Natural Science Foundation of China (41571109).
中文摘要:

绿洲效果能改进一个干旱区域的地区性的气候和可居住。在这研究,我们探索了分析绿洲寒冷岛效果( OCIE )沿着 Tarim 盆的边散布的绿洲的冷岛效果紧张, OCIE 的空间时间的变化,基于 MODIS 用地理统计和 GIS 方法在空气温度上影响 OCIE 的 OCIE 和影响的因素打表面温度,陆地使用/盖住变化( LUCC )和观察空气温度数据。结果在夏天最高证明在 Tarim 盆的所有绿洲展出了冷岛效果,与 OCIE 紧张(9.08 ? 楦浲朠潲湵吗?

英文摘要:

Oasis effect can improve the regional climate and habitability of an arid region. In this study, we explored the cold island effects of oases distributed along the edge of Tarim Basin by analyzing the oasis cold island effect (OCIE) intensity, spatial-temporal variation of OCIE, factors influencing the OCIE and impacts of OCIE on air temperature using geographical statistics and GIS methods based on the MODIS land surface temperature, land use/cover change (LUCC) and observed air temperature data. Results showed that all the oases in the Tarim Basin exhibited cold island effects, with the OCIE intensity highest in summer (-9.08℃), followed by autumn (-4.24℃) and spring (-3.85℃). The total area of oasis cold island (OCI) and the comprehensive OCIE index showed the same seasonal change trend as the OCIE intensity. However, the changing trends in areas of OCI with strong, medium and weak OCIEs were inconsistent across different seasons. Farmland and water areas were found to be the key contributors that affected the OCIE, and the area and aggregation metrics of these two land use/cover types directly contributed to the OCIE. By contrast, natural vegetation, such as forest and grassland, almost had no contribution to the OCIE. Simulation of observed air temperature data showed that if farmland is replaced by forest or grassland in the oasis, the mean, maximum and minimum air temperatures will increase significantly. This heating effect will be higher in summer (reaching 1.14℃ to 2.08℃) and lower in spring and autumn. Moreover, the heating effect of farmland being replaced by forest will be higher than that of farmland being replaced by grassland. These results can provide a basis for understanding the cold island effect of oases in arid regions.

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