Título
Effects of soil rewetting and thawing on soil gas fluxes: a review of current literature and suggestions for future research
Autor
Dong_Gill Kim
Colaborador
RODRIGO VARGAS RAMOS (Colaborador)
Benjamin Bond_Lamberty (Colaborador)
Merritt Turetsky (Colaborador)
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: http://dx.doi.org/10.5194/bg-9-2459-2012
Materias
Resumen o descripción
"The rewetting of dry soils and the thawing of frozen soils are short-term, transitional phenomena in terms of hydrology and the thermodynamics of soil systems. The impact of these short-term phenomena on larger scale ecosystem fluxes is increasingly recognized, and a growing number of studies show that these events affect fluxes of soil gases such as carbon dioxide (CO<sub>2</sub>), methane (CH<sub>4</sub>), nitrous oxide (N<sub>2</sub>O), ammonia (NH<sub>3</sub>) and nitric oxide (N<sub>O</sub>). Global climate models predict that future climatic change is likely to alter the frequency and intensity of drying-rewetting events and thawing of frozen soils. These future scenarios highlight the importance of understanding how rewetting and thawing will influence dynamics of these soil gases. This study summarizes findings using a new database containing 338 studies conducted from 1956 to 2011, and highlights open research questions. The database revealed conflicting results following rewetting and thawing in various terrestrial ecosystems and among soil gases, ranging from large increases in fluxes to non-significant changes. Studies reporting lower gas fluxes before rewetting tended to find higher post-rewetting fluxes for CO<sub>2</sub>, N<sub>2</sub>O and N<sub>O</sub>; in addition, increases in N<sub>2</sub>O flux following thawing were greater in warmer climate regions. We discuss possible mechanisms and controls that regulate flux responses, and recommend that a high temporal resolution of flux measurements is critical to capture rapid changes in gas fluxes after these soil perturbations. Finally, we propose that future studies should investigate the interactions between biological (i.e., microbial community and gas production) and physical (i.e., porosity, diffusivity, dissolution) changes in soil gas fluxes, apply techniques to capture rapid changes (i.e., automated measurements), and explore synergistic experimental and modelling approaches."
Editor
Copernicus Publications
Fecha de publicación
2012
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
Biogeosciences, Vol. 9, Págs. 2459–2483
Idioma
Inglés
Sugerencia de citación
Kim,D.G.,Vargas,R.,Bond Lamberty,B.,Turetsky,M.R.2012.Effects of soil rewetting and thawing on soil gas fluxes: a review of current literature and suggestions for future research.Biogeosciences,9,2459–2483.doi::10.5194/bg-9-2459-2012
Repositorio Orígen
Repositorio Institucional CICESE
Descargas
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