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DOI | 10.1007/s00382-016-3442-7 |
Accounting for observation uncertainties in an evaluation metric of low latitude turbulent air-sea fluxes: application to the comparison of a suite of IPSL model versions | |
Servonnat, Jerome1; Gainusa-Bogdan, Alina1,2; Braconnot, Pascale1 | |
2017-09-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Turbulent momentum and heat (sensible heat and latent heat) fluxes at the air-sea interface are key components of the whole energetic of the Earth's climate. The evaluation of these fluxes in the climate models is still difficult because of the large uncertainties associated with the reference products. In this paper we present an objective metric accounting for reference uncertainties to evaluate the annual cycle of the low latitude turbulent fluxes of a suite of IPSL climate models. This metric consists in a Hotelling T (2) test between the simulated and observed field in a reduce space characterized by the dominant modes of variability that are common to both the model and the reference, taking into account the observational uncertainty. The test is thus more severe when uncertainties are small as it is the case for sea surface temperature (SST). The results of the test show that for almost all variables and all model versions the model-reference differences are not zero. It is not possible to distinguish between model versions for sensible heat and meridional wind stress, certainly due to the large observational uncertainties. All model versions share similar biases for the different variables. There is no improvement between the reference versions of the IPSL model used for CMIP3 and CMIP5. The test also reveals that the higher horizontal resolution fails to improve the representation of the turbulent surface fluxes compared to the other versions. The representation of the fluxes is further degraded in a version with improved atmospheric physics with an amplification of some of the biases in the Indian Ocean and in the intertropical convergence zone. The ranking of the model versions for the turbulent fluxes is not correlated with the ranking found for SST. This highlights that despite the fact that SST gradients are important for the large-scale atmospheric circulation patterns, other factors such as wind speed, and air-sea temperature contrast play an important role in the representation of turbulent fluxes. |
英文关键词 | Climate model evaluation Turbulent air-sea fluxes Spatio-temporal variability Statistic Metric Uncertainty Latent heat flux Sensible heat flux Wind stress IPSL model |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408718200041 |
WOS关键词 | PROBABILITY-DISTRIBUTION ; SURFACE TEMPERATURE ; TROPICAL ATLANTIC ; CLIMATE ; SENSITIVITY ; ATMOSPHERE ; VARIABILITY ; SIMULATIONS ; IMPACTS ; TRENDS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35783 |
专题 | 气候变化 |
作者单位 | 1.Univ Paris Saclay, Lab Sci Climat & Environm, LSCE IPSL, CEA CNRS UVSQ, F-91191 Gif Sur Yvette, France; 2.UMR CNRS 5805 Environm & Paleoenvironm Ocean & Co, Bordeaux, France |
推荐引用方式 GB/T 7714 | Servonnat, Jerome,Gainusa-Bogdan, Alina,Braconnot, Pascale. Accounting for observation uncertainties in an evaluation metric of low latitude turbulent air-sea fluxes: application to the comparison of a suite of IPSL model versions[J]. CLIMATE DYNAMICS,2017,49. |
APA | Servonnat, Jerome,Gainusa-Bogdan, Alina,&Braconnot, Pascale.(2017).Accounting for observation uncertainties in an evaluation metric of low latitude turbulent air-sea fluxes: application to the comparison of a suite of IPSL model versions.CLIMATE DYNAMICS,49. |
MLA | Servonnat, Jerome,et al."Accounting for observation uncertainties in an evaluation metric of low latitude turbulent air-sea fluxes: application to the comparison of a suite of IPSL model versions".CLIMATE DYNAMICS 49(2017). |
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