Reliability and importance of structural diversity of climate model ensembles
Reliability and importance of structural diversity of climate model ensembles
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气候模式集合结构多样性的可靠性和重要性
DOI:
10.1007/s00382-013-1733-9
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Yokohata T
中科院分区:
文献类型:
--
作者:
Yokohata T
We investigate the performance of the newest generation multi-model ensemble (MME) from the Coupled Model Intercomparison Project (CMIP5). We compare the ensemble to the previous generation models (CMIP3) as well as several single model ensembles (SMEs), which are constructed by varying components of single models. These SMEs range from ensembles where parameter uncertainties are sampled (perturbed physics ensembles) through to an ensemble where a number of the physical schemes are switched (multi-physics ensemble). We focus on assessing reliability against present-day climatology with rank histograms, but also investigate the effective degrees of freedom (EDoF) of the fields of variables which makes the statistical test of reliability more rigorous, and consider the distances between the observation and ensemble members. We find that the features of the CMIP5 rank histograms, of general reliability on broad scales, are consistent with those of CMIP3, suggesting a similar level of performance for present-day climatology. The spread of MMEs tends towards being “over-dispersed” rather than “under-dispersed”. In general, the SMEs examined tend towards insufficient dispersion and the rank histogram analysis identifies them as being statistically distinguishable from many of the observations. The EDoFs of the MMEs are generally greater than those of SMEs, suggesting that structural changes lead to a characteristically richer range of model behaviours than is obtained with parametric/physical-scheme-switching ensembles. For distance measures, the observations and models ensemble members are similarly spaced from each other for MMEs, whereas for the SMEs, the observations are generally well outside the ensemble. We suggest that multi-model ensembles should represent an important component of uncertainty analysis.
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DOI:
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发表时间:
2010
期刊:
American Journal of Economics and Business Administration
影响因子:
--
作者:
Nakano;M. and S. Managi;関西大学人間活動理論研究センター編著・山住勝広監修(蓮見二郎);佐藤泰裕(共著);Kazunori Minetaki
通讯作者:
Kazunori Minetaki
影响因子:
4.3
作者:
J. Hargreaves;A. Paul;R. Ohgaito;A. Abe‐Ouchi;J. Annan
通讯作者:
J. Annan
DOI:
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发表时间:
2004
期刊:
影响因子:
--
作者:
D. Wilks
通讯作者:
D. Wilks
DOI:
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发表时间:
1978
期刊:
影响因子:
--
作者:
気象庁気象研究所
通讯作者:
気象庁気象研究所
DOI:
--
发表时间:
2005
期刊:
SOLA Vol.1
影响因子:
--
作者:
Annan;J.;J.C.Hargreaves;R.Ohgaito;A.Abe-Ouchi;S.Emori
通讯作者:
S.Emori