Abstract
This letter investigates a double temperature inversion event, which persisted during April 23–27, 2019 over the United Arab Emirates, which coincided with anomalously cold surface temperatures. An analysis of <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in situ</i> meteorological data, a microwave radiometer and radiosonde profiles, and aerosol profiles from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations satellite revealed a layer of dust between 100 and 600 m, and another between 1 and 5 km above ground level. The presence of these dust layers is consistent with the observed warmer and drier conditions at those heights, as dust traps the outgoing longwave radiation and absorbs the incoming shortwave radiation. Meanwhile, the high lapse-rate inversion maintains the dust in the upper air by reducing vertical mixing. This result stresses the importance of monitoring the vertical distribution of dust and its diurnal variability given the link with the formation of inversion and its lapse rate.
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