title: Modeling methane emissions from cattle in Mexico.
abstract: Modeling methane emissions from cattle requires data on herd size, herd distribution by weight and use, and distribution by climate. In this article, it is shown how empirical and semi-empirical models were obtained for these data in Mexico. Some shortfalls in the Tier 2 approach of the 1994 IPCC's methodology for emissions from enteric fermentation are discussed and an intermediate procedure is proposed. These methods could also be applied in other countries.
authors.affiliation: Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México. ruizs@servidor.unam.mx
authors.forename: L G
authors.initials: LG
authors.lastname: Ruiz-Suárez
authors.forename: E
authors.initials: E
authors.lastname: González-Avalos
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D002417:Cattle / Q000502:physiology*; D004755:Enterobacteriaceae / Q000378:metabolism; D004784:Environmental Monitoring / Q000379:methods*; D005285:Fermentation; D017752:Greenhouse Effect; D008372:Manure; D008697:Methane / Q000032:analysis*; D008800:Mexico; D008962:Models, Theoretical
chemical_list: D008372:Manure; D008697:Methane