A global wetland methane emissions and uncertainty dataset for atmospheric chemical transport models
A global wetland methane emissions and uncertainty dataset for atmospheric chemical transport models
复制标题
全球湿地甲烷排放和大气化学传输模型的不确定性数据集
DOI:
10.5194/gmd-2016-224
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
D. Jacob
中科院分区:
文献类型:
--
作者:
A. Bloom;K. Bowman;Meemong Lee;A. Turner;R. Schroeder;J. Worden;R. Weidner;K. McDonald;D. Jacob
Wetland emissions remain one of the principal sources of uncertainty in the global atmospheric methane (CH4) budget, largely due to poorly constrained process controls on CH4 production in waterlogged soils. Process-based estimates of global wetland CH4 emissions and their associated uncertainties can provide crucial prior information for model-based top-down CH4 emission 15 estimates. Here we construct a global wetland CH4 emission model ensemble for use in atmospheric chemical transport models. Our 0.5°×0.5° resolution model ensemble is based on satellite-derived surface water extent and precipitation re-analyses, nine heterotrophic respiration simulations (eight carbon cycle models and a data-constrained terrestrial carbon cycle analysis) and three temperature parameterizations for the period 2009-2010; an extended ensemble subset – based solely on 20 precipitation and the data-constrained terrestrial carbon cycle analysis – is derived for the period 20012015. We incorporate the mean of the full and extended model ensembles into GEOS-Chem and compare model against surface measurements of atmospheric CH4; model performance (site-level and zonal mean anomaly residuals) compares favourably against published wetland CH4 emissions scenarios. We find that uncertainties in carbon decomposition rates and wetland extent together account 25 for more than 80% of the primary uncertainty in the timing, magnitude and seasonal variability of wetland CH4 emissions, although uncertainty in the temperature CH4:C dependence is a significant Geosci. Model Dev. Discuss., doi:10.5194/gmd-2016-224, 2016 Manuscript under review for journal Geosci. Model Dev. Published: 7 September 2016 c © Author(s) 2016. CC-BY 3.0 License.
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影响因子:
4.9
作者:
Bloom, A. A.;Williams, M.
通讯作者:
Williams, M.
影响因子:
6.3
作者:
Fraser, A.;Palmer, P. I.;Weiss, R. F.
通讯作者:
Weiss, R. F.
影响因子:
11.6
作者:
M. Turetsky;A. Kotowska;J. Bubier;N. Dise;P. Crill;E. Hornibrook;K. Minkkinen;T. Moore;I. Myers-Smith
通讯作者:
M. Turetsky;A. Kotowska;J. Bubier;N. Dise;P. Crill;E. Hornibrook;K. Minkkinen;T. Moore;I. Myers-Smith
影响因子:
5.2
作者:
Wilson C
通讯作者:
Wilson C
影响因子:
13.5
作者:
Le Toan, T.;Quegan, S.;Ulander, L.
通讯作者:
Ulander, L.