@article{fdi:010060481,
  title = {{P}resent state of global wetland extent and wetland methane modelling : methodology of a model inter-comparison project ({WETCHIMP})},
  author = {{W}ania, {R}. and {M}elton, {J}. {R}. and {H}odson, {E}. {L}. and {P}oulter, {B}. and {R}ingeval, {B}. and {S}pahni, {R}. and {B}ohn, {T}. and {A}vis, {C}. {A}. and {C}hen, {G}. and {E}liseev, {A}. {V}. and {H}opcroft, {P}. {O}. and {R}iley, {W}. {J}. and {S}ubin, {Z}. {M}. and {T}ian, {H}. and van {B}odegom, {P}. {M}. and {K}leinen, {T}. and {Y}u, {Z}. {C}. and {S}ingarayer, {J}. {S}. and {Z}urcher, {S}. and {L}ettenmaier, {D}. {P}. and {B}eerling, {D}. {J}. and {D}enisov, {S}. {N}. and {P}rigent, {C}. and {P}apa, {F}abrice and {K}aplan, {J}. {O}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {W}etland and {W}etland {CH}4 {I}ntercomparison of {M}odels {P}roject ({WETCHIMP}) was created to evaluate our present ability to simulate large-scale wetland characteristics and corresponding methane ({CH}4) emissions. {A} multi-model comparison is essential to evaluate the key uncertainties in the mechanisms and parameters leading to methane emissions. {T}en modelling groups joined {WETCHIMP} to run eight global and two regional models with a common experimental protocol using the same climate and atmospheric carbon dioxide ({CO}2) forcing datasets. {W}e reported the main conclusions from the intercomparison effort in a companion paper ({M}elton et al., 2013). {H}ere we provide technical details for the six experiments, which included an equilibrium, a transient, and an optimized run plus three sensitivity experiments (temperature, precipitation, and atmospheric {CO}2 concentration). {T}he diversity of approaches used by the models is summarized through a series of conceptual figures, and is used to evaluate the wide range of wetland extent and {CH}4 fluxes predicted by the models in the equilibrium run. {W}e discuss relationships among the various approaches and patterns in consistencies of these model predictions. {W}ithin this group of models, there are three broad classes of methods used to estimate wetland extent: prescribed based on wetland distribution maps, prognostic relationships between hydrological states based on satellite observations, and explicit hydrological mass balances. {A} larger variety of approaches was used to estimate the net {CH}4 fluxes from wetland systems. {E}ven though modelling of wetland extent and {CH}4 emissions has progressed significantly over recent decades, large uncertainties still exist when estimating {CH}4 emissions: there is little consensus on model structure or complexity due to knowledge gaps, different aims of the models, and the range of temporal and spatial resolutions of the models.},
  keywords = {},
  booktitle = {},
  journal = {{G}eoscientific {M}odel {D}evelopment},
  volume = {6},
  numero = {3},
  pages = {617--641},
  ISSN = {1991-959{X}},
  year = {2013},
  DOI = {10.5194/gmd-6-617-2013},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060481},
}