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The diabatic heat budget of the upper troposphere and lower/mid stratosphere in ECMWF reanalyses by S. Fueglistaler; B. Legras; A. Beljaars; J.-J. Morcrette; A. Simmons; A. M. Tompkins; S. Uppala is a Earth and Planetary Sciences article available to read on EtoBox.

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## Abstract We present an analysis of the diabatic terms in the thermodynamic energy equation from ERA‐40 and the ECMWF reanalysis ERA‐Interim. We analyse the clear‐sky radiative heating, the cloud radiative effects, and the impact from latent heat exchange and mixing. The diabatic heat budget is closed with the calculation of the temperature assimilation increment. The previously noted excessive tropospheric circulation at low latitudes in ERA‐40 is also reflected in the diabatic heat budget. The temperature increment acts to cool the excessive model heating. Conversely, ERA‐Interim requires heating from the assimilation increment at low latitudes, suggesting too little convection. In the tropical tropopause layer (TTL), both reanalyses show a strong heating from the interaction of clouds with radiation, but lack of reliable independent estimates renders the role of clouds uncertain. Both reanalyses show cooling in the TTL by the assimilation increment, suggesting that the models may overestimate the cloud radiative heating, or that the convective parametrization scheme has difficulties in capturing the thermal effects of deep convection. In the stratosphere, ERA‐40 shows unrealis

Who reads The diabatic heat budget of the upper troposphere and lower/mid stratosphere in ECMWF reanalyses?

Author

S. Fueglistaler; B. Legras; A. Beljaars; J.-J. Morcrette; A. Simmons; A. M. Tompkins; S. Uppala

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley (ISSN 0035-9009)

Published

2009

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)