1955—2005年中国稻田甲烷排放估算  

Estimates of Methane Emission from Rice Paddies in China over the Period 1955-2005

作　　者：王平[1] 黄耀[1,2] 张稳[2] 

机构地区：[1]南京农业大学资源与环境科学学院,南京210095 [2]中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100029

出　　处：《气候变化研究进展》2009年第5期291-297,共7页Climate Change Research

基　　金：国家自然科学基金项目(40675075)资助

摘　　要：将稻田甲烷排放模型CH4MOD和GIS空间化数据库结合,模拟估计了中国大陆1955—2005年水稻生长季稻田甲烷排放量。结果表明:中国稻田甲烷排放总体呈增加趋势,1960年代、1970年代、1980年代和1990年代年均排放量分别为(3.18±0.53)、(4.71±0.27)、(5.22±0.24)和(5.79±0.34)Tg,2000—2005年平均排放量为(6.25±0.36)Tg。1960—1975年增加最快,速率为0.167Tg/a;自1970年代中期开始增加速率减缓,为0.054Tg/a。中国稻田甲烷排放高值区主要分布在湖南、湖北、江西、广东、广西、江苏和安徽省,约占全国稻田甲烷排放总量的73.2%。自1980年代初以来,东北三省稻田甲烷排放增加显著,这主要归因于该区水稻种植面积的迅速扩大。Methane emission during rice-growing season in China＇s paddies was estimated over the period 1955- 2005 by linking the CH4MOD, a model for simulating rice paddy CH4 emission, to a GIS database. Model estimates indicate that the CH4 emission from China＇s rice paddies increased generally over the fifty years. The quantities of annual CH4 emission were estimated to be （3.18 ± 0.53）, （4.71 ± 0.27）, （5.22 ± 0.24） and （5.79 ± 0.34） Tg in the 1960s, 1970s, 1980s and 1990s, respectively; and the mean amount of annual CH4 emission from 2000 to 2005 was estimated to be （6.25 ± 0.36）Tg. A rapid increase in CH4 emission occurred in the period 1960-1975, with a mean growth rate of 0.167 Tg/a, while the growth rate decreased to 0.054 Tg/a from 1976 to 2005. Higher CH4 emission occurred in Hunan, Hubei, Jiangxi, Guangdong, Guangxi, Jiangsu and Anhui provinces, accounting for approximately 73.2% of the national total CH4 emission from rice fields. Methane emission in Northeast China was estimated to have increased significantly since the early 1980s, which is mainly attributed to an expansion of rice cultivation.

关 键 词：CH4MOD 稻田 甲烷排放 时空变化 中国 

分 类 号：S511[农业科学—作物学]