Using sub-limb observations to measure gravity waves excited by convection.
Using sub-limb observations to measure gravity waves excited by convection.
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DOI:
10.1038/s41526-023-00259-2
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发表时间:
2023-02-08
期刊:
影响因子:
5.1
通讯作者:
Polichtchouk, Inna
中科院分区:
文献类型:
--
作者:
Wright, Corwin J.;Ungermann, Joern;Preusse, Peter;Polichtchouk, Inna
Convective gravity waves are a major driver of atmospheric circulation, including the stratospheric and mesospheric quasi-biennial oscillation (QBO) and the Brewer–Dobson circulation. Previous work shows clear evidence that these waves can be excited by both single convective cells and by mesoscale convective complexes acting as a single unit. However, the partitioning of the generated waves and, crucially for atmospheric model development, the flux of momentum they transport between these two types of excitation process remains highly uncertain due to a fundamental lack of suitable observations at the global scale. Here, we use both theoretical calculations and sampled output from a high-resolution weather model to demonstrate that a satellite instrument using a sub-limb geometry would be well suited to characterising the short-vertical short-horizontal gravity waves these systems produce, and hence to provide the scientific knowledge needed to identify the relative wave-driving contribution of these two types of convective wave excitation.
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