气候变化领域集成服务门户(CCPortal): Consistency and homogeneity of atmospheric energy, moisture, and mass budgets in ERA5

CCPortal

DOI	10.1175/JCLI-D-20-0676.1
	Consistency and homogeneity of atmospheric energy, moisture, and mass budgets in ERA5
	Mayer J.; Mayer M.; Haimberger L.
发表日期	2021
ISSN	08948755
起始页码	3955
结束页码	3974
卷号	34 期号:10
英文摘要	This study uses advanced numerical and diagnostic methods to evaluate the atmospheric energy budget with the fifth major global reanalysis produced by ECMWF (ERA5) in combination with observed and reconstructed top of the atmosphere (TOA) energy fluxes for the period 1985–2018. We assess the meridional as well as ocean–land energy transport and perform internal consistency checks using mass-balanced data. Furthermore, the moisture and mass budgets in ERA5 are examined and compared with previous budget evaluations using ERA-Interim as well as observation-based estimates. Results show that peak annual mean meridional atmospheric energy transports in ERA5 (4.58 6 0.07 PW in the Northern Hemisphere) are weaker compared to ERA-Interim (4.74 6 0.09 PW), where the higher spatial and temporal resolution of ERA5 can be excluded as a possible reason. The ocean–land energy transport in ERA5 is reliable at least from 2000 onward (;2.5 PW) such that the imbalance between net TOA fluxes and lateral energy fluxes over land are on the order of;1 W m22. Spinup and spindown effects as revealed from inconsistencies between analyses and forecasts are generally smaller and temporally less variable in ERA5 compared to ERA-Interim. Evaluation of the moisture budget shows that the ocean–land moisture transport and parameterized freshwater fluxes agree well in ERA5, while there are large inconsistencies in ERA-Interim. Overall, the quality of the budgets derived from ERA5 is demonstrably better than estimates from ERA-Interim. Still some particularly sensitive budget quantities (e.g., precipitation, evaporation, and ocean–land energy transport) show apparent inhomogeneities, especially in the late 1990s, which warrant further investigation and need to be considered in studies of interannual variability and trends. © 2021 American Meteorological Society.
英文关键词	Climate variability; Energy budget/balance; Energy transport; Heat budgets/fluxes; Moisture/moisture budget; Reanalysis data
语种	英语
scopus关键词	Moisture; Numerical methods; Oceanography; Petroleum reservoir evaluation; Atmospheric energy; Diagnostic methods; Interannual variability; Internal consistency; Moisture transport; Northern Hemispheres; Spatial and temporal resolutions; Top of the atmospheres; Budget control
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178561
作者单位	Department of Meteorology and Geophysics, University of Vienna, Vienna, Austria; European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom
推荐引用方式 GB/T 7714	Mayer J.,Mayer M.,Haimberger L.. Consistency and homogeneity of atmospheric energy, moisture, and mass budgets in ERA5[J],2021,34(10).
APA	Mayer J.,Mayer M.,&Haimberger L..(2021).Consistency and homogeneity of atmospheric energy, moisture, and mass budgets in ERA5.Journal of Climate,34(10).
MLA	Mayer J.,et al."Consistency and homogeneity of atmospheric energy, moisture, and mass budgets in ERA5".Journal of Climate 34.10(2021).