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生态学杂志 ›› 2010, Vol. 29 ›› Issue (07): 1432-1439.

• 综述与专论 • 上一篇    下一篇

冻融作用对土壤温室气体产生与排放的影响

伍 星,沈珍瑶**   

  1. 北京师范大学环境学院,环境模拟与污染控制国家重点联合实验室,北京 100875
  • 出版日期:2010-07-08 发布日期:2010-07-08

Effects of freezing-thawing cycle on greenhouse gases production and emission from soil: A review.

WU Xing, SHEN Zhen-yao   

  1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875,China
  • Online:2010-07-08 Published:2010-07-08

摘要: 土壤冻融交替是中、高纬度和高海拔地区常见的自然现象,土壤在冻融期间会经历一系列物理、化学和生物变化过程。有研究表明,冻融区土壤是温室气体的重要排放源,冻融期土壤温室气体的排放量在全年总排放量中占有重要的份额,尤其是N2O。随着全球气候变暖,部分地区的土壤环境将经受更广泛和频繁的冻融交替作用,这会导致土壤温室气体排放量增加,从而又进一步促进了气候变暖。本文重点概述了冻融作用对土壤温室气体产生与排放的影响及其主要影响机制,并简要提出了目前土壤冻融研究中的一些不足以及今后值得关注和深入研究的科学问题。

关键词: 尺度, 聚集度, 优势规则, 随机规则

Abstract: Soil freezing-thawing cycle is very common in the regions at mid-high latitude and high altitude. During this cycle, soil physical properties, chemical composition, and microbial activities could be affected. Many researches indicated that the soils in the above-mentioned regions were the important source of greenhouse gases, and the accumulative emission of soil greenhouse gases during freezing-thawing cycle could contribute greatly to their total annual fluxes budget, especially of N2O. Under global warming, the extension and frequency of soil freezing-thawing cycle could be increased in some regions, and the soil greenhouse gases emission in these regions would be enhanced, which in turn would promote global climate change. This paper summarized the research progress in the effects of freezing-thawing cycle on the greenhouse gases production and emission from soil, and the major related mechanisms. Some deficiencies in the study of soil freezing-thawing were pointed out, and the main issues in the future study were suggested.

Key words: Spatial scale, Aggregation, Majority rule, Random rule