Measuring CH4 Fluxes From Lake and Reservoir Sediments: Methodologies and Needs

Accurately quantifying the diffusive flux of CH 4 between sediments and overlying water column is crucial when constructing budgets in lakes reservoirs. Although a variety ex situ techniques exist for determining this flux, no reviews have provided comprehensive, comparative overview these approaches or discussed implications measurement method on estimation. Here, we critically review methods applied 163 peer-reviewed studies to estimate fluxes from lake sediments, including sediment incubations, benthic chambers, modeling column. For each method, summarize approach, discuss limitations advantages, published comparisons different methods. In addition, examine how likely shaped knowledge gaps current understanding dynamics. Finally, call development application new methods, along with additional testing intercomparison existing order advance fluxes.