GISS Global Methane and Livestock Distribution, 1-Degree

A global high resolution data base of animal population densities and associated methane (CH4) emissions has been developed at the NASA Goddard Institute for Space Studies (NASA/GISS). The animal population statistics were based primarily on the Food and Agriculture Organization (FAO) compilations and other sources. The animals were distributed using a 1-degree by 1-degree resolution data base of countries and land-use (Matthews, 1983). The animals included are cattle and dairy cows, water buffalo, sheep, goats, camels, pigs, horses, and caribou. Estimates of methane production from each animal type were applied to the animal populations to yield a global distribution of methane emissions by animals. About 55% of the global annual emissions was concentrated between 25 N and 55 N. Estimates of methane emissions from animals were based on the research by Crutzen et al. (1986).

在全球范围内，美国国家航空航天局戈达德太空研究所（NASA/GISS）已开发出一个高分辨率动物种群密度及其相关甲烷（CH4）排放数据库。该动物种群统计数据主要基于联合国粮食及农业组织（FAO）的汇编及其他来源。动物分布采用由Matthews（1983）提出的1度×1度分辨率的国界与土地利用数据库。所包括的动物种类包括牛、乳牛、水牛、绵羊、山羊、骆驼、猪、马和驯鹿。针对每种动物类型，均应用了甲烷产生量的估算，以得出动物种群全球分布的甲烷排放量。全球年度排放量的约55%集中在北纬25度至55度之间。动物甲烷排放量的估算基于Crutzen等人的研究（1986年）。