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Fog and Low Cloud Frequency and Properties from Active-Sensor Satellite Data
Open AccessArticle

Application of a Nighttime Fog Detection Method Using SEVIRI Over an Arid Environment

Department of Civil Infrastructure and Environmental Engineering, Khalifa University of Science and Technology, Abu Dhabi, UAE
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Remote Sens. 2020, 12(14), 2281; https://doi.org/10.3390/rs12142281
Received: 7 June 2020 / Revised: 7 July 2020 / Accepted: 7 July 2020 / Published: 15 July 2020
(This article belongs to the Special Issue Remote Sensing of Low-Level Liquid Water Clouds and Fog)
Fog degrades horizontal visibility causing significant adverse impacts on transport systems. The detection of fog from satellite data remains challenging especially in the presence of higher clouds, dust, mist, or unknown underlying soil conditions. Observations from Meteosat second generation Spinning-Enhanced Visible and Infrared Imager (MSG SEVIRI) over the United Arab Emirates (UAE), an arid area on the Arabian Peninsula, from 2016 to 2018 (two fog seasons) are used in this study. We implement an adaptive threshold-based technique using pseudo-emissivity values to detect nocturnal fog from SEVIRI. The method allows the threshold to vary spatially and temporally. Low clouds are detected with the analysis of the vertical temperature gradient. Fog classification was verified against four stations in the UAE, namely Abu Dhabi, Dubai, Al Ain, and Al Maktoum, where visibility and meteorological observations are available. The probability of detection (POD) (false alarm ratio (FAR)) was 0.81 (0.40), 0.83 (0.50), 0.83 (0.33), and 0.77 (0.44) at Abu Dhabi, Dubai, Al Ain, and Al Maktoum, respectively. In addition, the spatial frequency of fog is presented, which provides new insights into the fog dynamics in the region. View Full-Text
Keywords: fog; SEVIRI; desert; pseudo-emissivity; brightness temperature difference fog; SEVIRI; desert; pseudo-emissivity; brightness temperature difference
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MDPI and ACS Style

Weston, M.; Temimi, M. Application of a Nighttime Fog Detection Method Using SEVIRI Over an Arid Environment. Remote Sens. 2020, 12, 2281. https://doi.org/10.3390/rs12142281

AMA Style

Weston M, Temimi M. Application of a Nighttime Fog Detection Method Using SEVIRI Over an Arid Environment. Remote Sensing. 2020; 12(14):2281. https://doi.org/10.3390/rs12142281

Chicago/Turabian Style

Weston, Michael; Temimi, Marouane. 2020. "Application of a Nighttime Fog Detection Method Using SEVIRI Over an Arid Environment" Remote Sens. 12, no. 14: 2281. https://doi.org/10.3390/rs12142281

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