地理学报 ›› 2000, Vol. 67 ›› Issue (S1): 57-63.doi: 10.11821/xb2000S1010

• 论文 • 上一篇    下一篇

气候变化对土地覆被变化的 影响及其反馈模型

李克让1, 陈育峰1, 黄玫1, 李晓兵2, 叶卓佳3   

  1. 1. 中国科学院地理科学与资源研究所,北京100101;
    2. 北京师范大学资源与环境研究所,北京100873;
    3. 中国科学院大气物理研究所,北京100029
  • 收稿日期:2000-07-03 修回日期:2000-09-26 出版日期:2000-12-15 发布日期:2000-12-15
  • 基金资助:
    中国科技部“九五”重中之重项目(96-908-03-03)

Model Studies of the Impacts of Climate Change on Land Cover and Its Feedback

LI Ke-rang1, CHEN Yu-feng1, HUANG-Mei1, LI Xiao-bing2, YE Zhuo-jia3   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101;
    2. Institute of Resources science of Beijing Normal University, Beijing 100875;
    3. Institute of Atmospheric Physics, CAS,Beijing 100101
  • Received:2000-07-03 Revised:2000-09-26 Online:2000-12-15 Published:2000-12-15
  • Supported by:
    the National Key Project of the National Ninth Five Year Plan; No.96-908-03-03

摘要: 气候变化对土地覆被变化影响及其反馈模型研究主要内容包括:中国土地覆被季相变化 的时空差异性;中国土地覆被特征参数NDVI年际变化与气候变化的关系;中国气候-植被判 别模型;气候-土地覆被变化的神经网络建模及土地覆被的气候预测;土地利用/土地覆被变化 (LUCC)对气候影响的反馈机制和LUCC对中国土壤碳库的可能影响;土地覆被变化对气候影 响的反馈数值实验。

关键词: 气候变化, 土地覆被变化, 归一化差值植被指数(NDVI), 反馈模型

Abstract: It is revealed through principal component and factor analysis methods that there exist four types of seasonal patters of spatial differentiation of land corer change in China. The relationship between NDVI and seasonal and interannual precipitation and temperature change were studied for 17 typically vegetation types in China. The results show that impacts of precipitation and temperature interannual change on vegetation growth are different for regions of different vegetation types. The data of temperature and precipitation are used to predict NDVI in selected areas in China by methods of artificial neural networks and stepwise regression. The result shows that combining the two methods is helpful in improving prediction accuracy. Land cover change and climate change interaction through biophysical processes that involve the transfers of energy and water at the land surface and biophysical cycles that affect the concentrations of greenhouse gases and aerosols in the atmosphere. The impact of land cover change on the mesoscale boundary layer structure of the midlatitude semiarid area has been investigated by using a mesoscase biological meteorological model coupled with a cumulus ensemble parameterization scheme. A new China climate-vegetation model is developed, in which soil is taken as a limiting factor and elevation as an affecting factor. As a result, not only is the total precision of the model improved, but also is the precision of each vegetation type amended significantly.

Key words: climate change, land cover, Normalization Difference Vegetation lndex (NDVI), feedback model

中图分类号: 

  • P467