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Journal of Geophysical Research Atmospheres
Article . 2023 . Peer-reviewed
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Direct Comparison Between a Non‐Orographic Gravity Wave Drag Scheme and Constant Level Balloons

Authors: F. Lott; R. Rani; A. Podglajen; F. Codron; L. Guez; A. Hertzog; R. Plougonven;

Direct Comparison Between a Non‐Orographic Gravity Wave Drag Scheme and Constant Level Balloons

Abstract

The parameterization scheme that represents gravity waves due to convection in LMDz A, the atmospheric components of the IPSL coupled climate model (IPSLCM), is di rectly compared to Strateole- balloon observations made in the lower tropical strato sphere from November to February.The input meteorological fields necessary to run the parameterization offline are extracted from the ERA reanalysis and corre spond to the instantaneous meteorological conditions found underneath the balloons. In general, we find a fair agreement between measurements of the momentum fluxes due to waves with periods less than hr and the parameterization. The correlation of the daily values between the observations and the results of the parameterization is around which is statistically elevated considering that we consider around days of data and surprisingly good considering that the parameterization has not been tuned: the scheme is just the standard one that helps producing a Quasi-Biennial Oscillation in the IPSLCM model. Online simulations also show that the measured values of the momentum fluxes are also well representative of the zonally and averaged values of momentum fluxes needed in LMDz-A to simulate a QBO. The observations also tell that longer waves with pe riods smaller than a day roughly carry about twice as much fluxes as waves with peri ods smaller than an hour, which is a potential problems since low period waves that make the difference are potentially in the “grey zone” of most climate models.

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Country
France
Keywords

[SDE] Environmental Sciences, Atmospheric Science, Geophysics, Space and Planetary Science, [SDE]Environmental Sciences, Earth and Planetary Sciences (miscellaneous)

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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