自然资源学报 ›› 1999, Vol. 14 ›› Issue (4): 323-328.doi: 10.11849/zrzyxb.1999.04.006

• 论文 • 上一篇    下一篇

农业对小冰期和现代我国七月气候的影响模拟

严中伟, 魏和林   

  1. 中国科学院大气物理研究所, 北京 100029
  • 收稿日期:1999-04-27 修回日期:1999-07-20 出版日期:1999-12-25 发布日期:1999-12-25
  • 作者简介:严中伟(1963-),男,浙江人,研究员,博士,主要从事气候分析、模拟和预测方面的研究。
  • 基金资助:

    国家自然科学基金;中国科学院资源与生态环境研究重大项目

A comparative study of the impact of agriculture on July cli mate in China between the present and the Little Ice Age

YAN Zhong wei, WEI He lin   

  1. Institute of Atmospheric Physics, CAS, Beijing 100029, China
  • Received:1999-04-27 Revised:1999-07-20 Online:1999-12-25 Published:1999-12-25

摘要: 小冰期是数千年来最引人注目的一个冷期,也是近百年变暖的直接历史背景,该时期我国农业扩展范围已与现代相差无几。自然植被被农业植被替换,对区域水循环和气候变化都产生影响。比较冷暖时期该类影响之差别,有利于认识土地覆盖与气候的联系。文中利用全球和区域气候模式,考察小冰期和现代两种全球背景下我国区域土地覆盖变化对七月平均气候状况的影响。结果表明:小冰期夏季偏冷地区主要在北方,农业具有减缓小冰期大尺度降温的效应,而在较温暖且温度变化较小的华南和华中地区,农业则起一定的降温效应;农业对现代气候下的降水影响不大,但在小冰期背景下却导致降水减少

关键词: 农业, 土地覆盖—气候关系, 区域气候模拟, 小冰期, 现代暖期

Abstract: Agriculture changes natural vegetation and therefore water and energy exchanges between land and atmosphere.This may cause different impacts on regional climates,depending on the different climates themselves.We compare the impacts of agriculture on July climate between the Little Ice Age(LIA)and the present warm period through numerical modeling with global and regional climate models.The cooling in northern China in the LIA is about -1 3℃ lower than the present.Agriculture tends to ameliorate the large scale cooling(from -1.3℃ to -0.8℃).Agriculture causes widespread decreases in precipitation in eastern China in the LIA,but not under modern conditions.The different land surface energy balances induced by agriculture in different periods are discussed to explain the different climate effects of agriculture.

Key words: land cover climate relation, regional climate modeling, Little Ice Age

中图分类号: 

  • S162