| 土地覆盖/利用变化对中国区域气候的影响 |
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| 引用本文： | 张井勇,董文杰.土地覆盖/利用变化对中国区域气候的影响[J].中国科学院研究生院学报,2007,24(4). |
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| 作者姓名： | 张井勇 董文杰 |
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| 作者单位： | 1. 中国科学院大气物理研究所,北京,100029;纽约州立大学大气科学研究中心,纽约,12206
2. 中国科学院大气物理研究所,北京,100029;中国气象局国家气候中心,北京,100081 |
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| 摘 要： | 气候系统中的陆-气相互作用长期以来已经得到广泛的关注,但是直到最近,区域尺度上土地覆盖/利用变化对气候影响的统计事实分析仍非常少,模拟研究中植被对气候变化响应的描述不足.本文系统研究了陆-气相互作用对区域气候的影响,尤其针对上面所提到的两个方面.通过对前期的植被覆盖状况和夏季降水的关系研究为植被覆盖变化对区域气候的影响提供了观测统计上的证据,并进一步分辨出中国北方过渡带可能是植被-大气相互作用的最敏感地区.通过比较观测站点和再分析资料的年代际趋势表明城市化和其他的土地利用变化对气候变暖产生了贡献,使中国东部的平均气温升高了0.12 ℃/10 a.区域气候模拟还表明,中国北方过渡带及其附近地区的植被退化对表面气候和大气环流都带来了显著影响,它们的变化与观测的年代际异常以及我们统计分析的结果一致.表明地表退化可能是中国近几十年气候异常的重要原因之一.最后我们探讨了改进后的动态植被参数化方案在区域气候模拟中的作用.
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| 关 键 词： | 区域气候 土地覆盖/利用变化 陆-气相互作用 |
Impact of land cover/use change on regional climate over China |
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| ZHANG Jing-Yong,DONG Wen-Jie.Impact of land cover/use change on regional climate over China[J].Journal of the Graduate School of the Chinese Academy of Sciences,2007,24(4). |
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| Authors: | ZHANG Jing-Yong DONG Wen-Jie |
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| Abstract: | The substantial role of land-climate interaction as part of the climate system has been the focus of considerable attention for a long time. However, until recently little attention has been paid to the effects of land cover/use change on regional climate in observational investigations, and the response of vegetation to climate change in climate simulations. The present study evaluates the impact of land-atmosphere interaction on regional climate, focusing on the above two aspects. Our results show observational evidence for vegetation cover influence, and suggest that the transitional zone over northern China is the most sensitive region over China. Comparison of the decadal trends of the observed station and the analyzed data suggests that urbanization and other land use changes may warm the surface with the 0.12 ℃/10a increase of the daily mean surface temperature over East China. Regional climate simulations further show land surface degradation over transitional zone and surrounding areas could bring significant influences on not only surface climate but also atmospheric circulation. These changes are in good agreement with observations and our statistical results, implying the desertification over northern China is one of causes responsible for decadal climate anomalies over China. Finally, we discuss the implication of accurate treatment of land surface parameters and vegetation interaction in regional climate simulations. |
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| Keywords: | regional climate land cover/use change land-atmosphere interaction |
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