Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal
Mesoscale eddies are important to ocean circulation due to their roles in the transport of mass, energy, and heat. This study employs a combination of data sources to initiate a statistical analysis of eddy spatiotemporal characteristics in the Bay of Bengal (BOB) to elucidate the sea surface and ve...
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MDPI AG
2020-10-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/21/3485 |
| _version_ | 1797550065556914176 |
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| author | Xiao Yang Guangjun Xu Yu Liu Wenjin Sun Changshui Xia Changming Dong |
| author_facet | Xiao Yang Guangjun Xu Yu Liu Wenjin Sun Changshui Xia Changming Dong |
| author_sort | Xiao Yang |
| collection | DOAJ |
| description | Mesoscale eddies are important to ocean circulation due to their roles in the transport of mass, energy, and heat. This study employs a combination of data sources to initiate a statistical analysis of eddy spatiotemporal characteristics in the Bay of Bengal (BOB) to elucidate the sea surface and vertical structures of the eddies and their impacts on sea surface chlorophyll (Chl) distributions. The results suggest that 1237 cyclonic eddies (CEs) and 1121 anticyclonic eddies (AEs) were detected in 26 years. The number of two eddy polarities was almost the same, and most of them spread to the west or southwest direction. The vertical change of temperature (T) and salinity (S) caused by the eddies is studied and the anomalous eddies, i.e., a CE (AE) eddy with warm (cold) water at the center, are mainly distributed on the northeast side of the Island of Sri Lanka. Furthermore, CEs are found to increase Chl concentration in the surrounding sea by approximately 11.15%, while AEs decrease concentrations also by approximately 11.25%. Changes in Chl concentrations occur most rapidly during the mature and intensification eddy phases. Observations also indicate that the strong local current and wind fields are the primary mechanisms in eddy generation. |
| first_indexed | 2024-03-10T15:23:11Z |
| format | Article |
| id | doaj.art-f0bdbe8f7fa640db8b3a5aff109c6027 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T15:23:11Z |
| publishDate | 2020-10-01 |
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| series | Remote Sensing |
| spelling | doaj.art-f0bdbe8f7fa640db8b3a5aff109c60272023-11-20T18:19:12ZengMDPI AGRemote Sensing2072-42922020-10-011221348510.3390/rs12213485Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of BengalXiao Yang0Guangjun Xu1Yu Liu2Wenjin Sun3Changshui Xia4Changming Dong5School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaSouthern Laboratory of Ocean Science and Engineering (Guangdong Zhuhai), Zhuhai 519000, ChinaSouthern Laboratory of Ocean Science and Engineering (Guangdong Zhuhai), Zhuhai 519000, ChinaSchool of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaFirst Institute of Oceanography, Ministry of Natural Resources, Qingdao 266101, ChinaSchool of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaMesoscale eddies are important to ocean circulation due to their roles in the transport of mass, energy, and heat. This study employs a combination of data sources to initiate a statistical analysis of eddy spatiotemporal characteristics in the Bay of Bengal (BOB) to elucidate the sea surface and vertical structures of the eddies and their impacts on sea surface chlorophyll (Chl) distributions. The results suggest that 1237 cyclonic eddies (CEs) and 1121 anticyclonic eddies (AEs) were detected in 26 years. The number of two eddy polarities was almost the same, and most of them spread to the west or southwest direction. The vertical change of temperature (T) and salinity (S) caused by the eddies is studied and the anomalous eddies, i.e., a CE (AE) eddy with warm (cold) water at the center, are mainly distributed on the northeast side of the Island of Sri Lanka. Furthermore, CEs are found to increase Chl concentration in the surrounding sea by approximately 11.15%, while AEs decrease concentrations also by approximately 11.25%. Changes in Chl concentrations occur most rapidly during the mature and intensification eddy phases. Observations also indicate that the strong local current and wind fields are the primary mechanisms in eddy generation.https://www.mdpi.com/2072-4292/12/21/3485Bay of Bengalmesoscale eddiesvector-geometry eddy detectioneddy characteristicssea surface chlorophyll |
| spellingShingle | Xiao Yang Guangjun Xu Yu Liu Wenjin Sun Changshui Xia Changming Dong Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal Remote Sensing Bay of Bengal mesoscale eddies vector-geometry eddy detection eddy characteristics sea surface chlorophyll |
| title | Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal |
| title_full | Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal |
| title_fullStr | Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal |
| title_full_unstemmed | Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal |
| title_short | Multi-Source Data Analysis of Mesoscale Eddies and Their Effects on Surface Chlorophyll in the Bay of Bengal |
| title_sort | multi source data analysis of mesoscale eddies and their effects on surface chlorophyll in the bay of bengal |
| topic | Bay of Bengal mesoscale eddies vector-geometry eddy detection eddy characteristics sea surface chlorophyll |
| url | https://www.mdpi.com/2072-4292/12/21/3485 |
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