Monthly and zonally averaged zonal wind information in the equatorial stratosphere provided by GNSS radio occultation,Quarterly Journal of the Royal Meteorological Society

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Monthly and zonally averaged zonal wind information in the equatorial stratosphere provided by GNSS radio occultation
Quarterly Journal of the Royal Meteorological Society ( IF 3.0 ) Pub Date : 2020-07-13 , DOI: 10.1002/qj.3870
S. B. Healy ₁ , I. Polichtchouk ₁ , A. Horányi ₁

Affiliation

It is demonstrated that a realistic quasi‐biennial oscillation (QBO) of the zonally averaged zonal winds in the tropical stratosphere can be retrieved from a monthly mean GNSS radio occultation (GNSS‐RO) geopotential height climatology via equatorial thermal wind balance. The retrieved GNSS‐RO zonal winds are compared with a zonal wind climatology from radiosonde measurements at Singapore, and the ERA5 atmospheric reanalysis. Simplified low‐resolution reanalysis experiments also show that assimilating just reprocessed GNSS‐RO bending angles and AMSU‐A channel 14 radiances produces a reasonable QBO. Further, it is demonstrated that the ERA5 and ERA‐Interim tropical zonal winds at 30 and 10 hPa are more consistent after the assimilation of COSMIC GNSS‐RO measurements in 2006.

中文翻译：

GNSS无线电掩星提供的赤道平流层月度和纬向平均纬向风信息

结果表明，可以通过赤道热风平衡从每月平均GNSS无线电掩星（GNSS-RO）地势高度气候学中检索到热带平流层中纬向平均纬向风的逼真的准两年一次振荡（QBO）。将检索到的GNSS-RO纬向风与新加坡无线电探空仪测量和ERA5大气再分析的纬向风气候学进行比较。简化的低分辨率再分析实验还表明，仅吸收经过重新处理的GNSS-RO弯曲角度和AMSU-A通道14的辐射，就可以得出合理的QBO。此外，在2006年对COSMIC GNSS-RO测量进行同化后，证明了在30 hPa和10 hPa时的ERA5和ERA-热带中期纬向风更加一致。

更新日期：2020-07-13

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