Premium
Methane emissions from lakes: Dependence of lake characteristics, two regional assessments, and a global estimate
Author(s) -
Bastviken David,
Cole Jonathan,
Pace Michael,
Tranvik Lars
Publication year - 2004
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2004gb002238
Subject(s) - methane , environmental science , greenhouse gas , anoxic waters , hydrology (agriculture) , methane emissions , phosphorus , carbon fibers , atmospheric sciences , physical geography , oceanography , geology , ecology , chemistry , geography , geotechnical engineering , biology , materials science , organic chemistry , composite number , composite material
Lake sediments are “hot spots” of methane production in the landscape. However, regional and global lake methane emissions, contributing to the greenhouse effect, are poorly known. We developed predictions of methane emissions from easily measured lake characteristics based on measurements for 11 North American and 13 Swedish lakes, and literature values from 49 lakes. Results suggest that open water methane emission can be predicted from variables such as lake area, water depth, concentrations of total phosphorus, dissolved organic carbon, and methane, and the anoxic lake volume fraction. Using these relations, we provide regional estimates from lakes in Sweden and the upper midwest of the United States. Considering both open water and plant‐mediated fluxes, we estimate global emissions as 8–48 Tg CH 4 yr −1 (6–16% of total natural methane emissions and greater than oceanic emission), indicating that lakes should be included as a significant source in global methane budgets.