全球变暖背景下土地利用/土地覆盖变化气候效应的新认识

被引:16
作者
华文剑 [1 ,2 ]
陈海山 [1 ,2 ]
机构
[1] 南京信息工程大学气象灾害教育部重点实验室
[2] 南京信息工程大学大气科学学院
关键词
土地利用/土地覆盖变化; 全球变暖; 气候效应;
D O I
暂无
中图分类号
F301.2 [土地管理、规划及利用]; P467 [气候变化、历史气候];
学科分类号
083306 ; 0903 ; 0706 ; 070601 ;
摘要
温室气体排放和土地利用/土地覆盖变化(land use/land cover change,LUCC)是人类影响气候变化的两种主要活动;在全球变暖背景下,温度和降水是否显著增加从而导致LUCC的气候效应更加剧烈?利用NCAR CAM4.0模式,考虑温室气体和LUCC的年际变化情况下,探讨不同气候背景下LUCC气候效应的重要性.研究表明,在1850年温室气体含量背景下,LUCC引起的气候敏感性为0.54℃/(W/m2),而在当代温室气体含量背景下,LUCC引起的气候敏感性为0.26℃/(W/m2).不同气候背景场对LUCC引起的温度差异在偏高纬度显著,全球变暖主要改变中高纬度的积雪-反照率来影响LUCC对温度的变化;而在热带和副热带区域,全球变暖引起的降水的区域差异是造成LUCC的气候响应存在不同的主要原因.
引用
收藏
页码:2832 / 2839
页数:8
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