• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Examining vegetation and climate interactions: A comparative study of different vegetation types and their impacts on atmospheric energetics and dynamics at the regional and global scales.
【24h】

Examining vegetation and climate interactions: A comparative study of different vegetation types and their impacts on atmospheric energetics and dynamics at the regional and global scales.

机译：检查植被和气候的相互作用：在区域和全球范围内对不同植被类型及其对大气能量和动力学影响的比较研究。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

It is widely recognized that terrestrial ecosystems play an important role in maintaining the climate system. Vegetation influences the climate through complex biophysical exchanges of energy, water, and momentum, and changes to these fluxes can have a significant impact on the climate. As a result, natural and anthropogenic land use and land cover change can have a substantial impact on climate.; Using a coupled atmosphere-biosphere model (CCM3-IBIS), the influence of vegetation on climate at the regional, continental, and global scales is evaluated. Comparison of the vegetation removal and control simulations illustrates the climatic influence of particular vegetation types. The mechanisms responsible for influencing the climate away from the surface, into the atmosphere, and to remote regions not directly coupled to the surface forcing are investigated.; It was found that vegetation biomes from around the globe have a significant influence on the climate system with the response dictated by the vegetation type, the geographic location, and the physical processes important for that biome. For instance, the climate response to tropical deforestation is a surface warming due to a large reduction in latent cooling. In contrast, boreal deforestation causes a large surface temperature cooling due to a higher surface albedo.; It was also shown that changes in the land surface resulting from land cover change affect the transport of energy throughout the three-dimensional atmosphere and can change the climate in adjacent regions or locations far removed from the surface forcing through modification of deep moist convection.; Finally, the results indicate that tropical deforestation can have a significant influence on the northern hemisphere climate through changes to the atmospheric thermodynamics and general circulation. Tropical deforestation was found to influence the northern hemisphere climate through changes to the high-level tropical outflow, the strength and structure of the East Asian Jet, the poleward shift in the high-latitude jet, and changes to the Eurasian climate through amplification of the positive phase of the North Atlantic Oscillation.
机译：众所周知，陆地生态系统在维持气候系统中发挥着重要作用。植被通过能量，水和动量的复杂生物物理交换影响气候，而这些通量的变化可能会对气候产生重大影响。结果，自然和人为的土地利用以及土地覆盖的变化可能对气候产生重大影响。使用大气-生物圈耦合模型（CCM3-IBIS），评估了植被对区域，大陆和全球范围内气候的影响。植被去除和控制模拟的比较说明了特定植被类型的气候影响。研究了影响气候从地表，进入大气以及到未直接与地表强迫耦合的偏远地区的机制。发现来自全球的植被生物群落对气候系统有重大影响，其响应由该生物群落重要的植被类型，地理位置和物理过程决定。例如，对热带森林砍伐的气候响应是由于潜在降温的大幅降低而导致的地表变暖。相反，由于较高的地表反照率，北方的森林砍伐导致大的地表温度下降。研究还表明，由土地覆盖变化引起的地表变化会影响整个三维大气中的能量传输，并且可以通过改变深湿对流来改变远离地表的邻近区域或位置的气候。最后，结果表明，热带森林砍伐可通过改变大气热力学和总体环流对北半球气候产生重大影响。人们发现，热带森林砍伐通过改变高空热带雨量，东亚急流的强度和结构，高纬急流的极移以及北半球急流的扩大而影响北半球的气候。北大西洋涛动的积极阶段。

著录项

  • 作者

    Snyder, Peter K.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Physics Atmospheric Science.; Environmental Sciences.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 205 p.
  • 总页数 205
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 大气科学（气象学）;环境科学基础理论;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号