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Article

Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations

by 1,2, 1, 1,2,3,4, 1,2,3,4, 1 and 5,*
1
School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
2
Southern Laboratory of Ocean Science and Engineering (Zhuhai), Zhuhai 519000, China
3
Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, China
4
Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519000, China
5
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
*
Author to whom correspondence should be addressed.
Academic Editors: Zhi-jun Dai and Weiguo Jiang
Water 2022, 14(1), 43; https://doi.org/10.3390/w14010043
Received: 24 November 2021 / Revised: 21 December 2021 / Accepted: 23 December 2021 / Published: 24 December 2021
(This article belongs to the Special Issue River Restoration and Morphodynamics)
The spatial pattern of the wintertime Pearl River plume front (PRPF), and its variability on diurnal and spring-neap time scales are characterized from the geostationary meteorological Himawari-8 satellite, taking advantage of the satellite’s unique 10-minutely sea surface temperature sequential images. Our findings suggest that the PRPF in winter consists of three subfronts: the northern one north of 22° N 20′, the southern one south of 21° N 40′, and the middle one between 22° N 20′ and 21° N 40′. The time-varying trend of the frontal intensity generally exhibits a strong-weak-strong pattern, with the weakest plume front occurring at about 06:00 UTC, which is closely associated with net surface heat flux over the region. The comparison in frontal variability between the spring and neap tides shows that the plume front during the spring tide generally tends to be more diffuse for the frontal probability, move further offshore for the frontal position, and be weaker for the frontal intensity than those found during the neap tide. These great differences largely depend on the tidally induced stronger turbulent mixing during the spring tide while the wind stress only plays a secondary role in the process. To best of our knowledge, the distinct diurnal variations in PRPF with wide coverage are observed for the first time. This study demonstrates that the Himawari-8 geostationary satellite has great potential in characterizing high-frequency surface thermal fronts in considerable detail. View Full-Text
Keywords: Pearl River; plume front; diurnal variability; Himawari-8 satellite; tide Pearl River; plume front; diurnal variability; Himawari-8 satellite; tide
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MDPI and ACS Style

Hu, Z.; Xie, G.; Zhao, J.; Lei, Y.; Xie, J.; Pang, W. Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations. Water 2022, 14, 43. https://doi.org/10.3390/w14010043

AMA Style

Hu Z, Xie G, Zhao J, Lei Y, Xie J, Pang W. Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations. Water. 2022; 14(1):43. https://doi.org/10.3390/w14010043

Chicago/Turabian Style

Hu, Zifeng, Guanghao Xie, Jun Zhao, Yaping Lei, Jinchi Xie, and Wenhong Pang. 2022. "Mapping Diurnal Variability of the Wintertime Pearl River Plume Front from Himawari-8 Geostationary Satellite Observations" Water 14, no. 1: 43. https://doi.org/10.3390/w14010043

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