Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island
A phytoplankton bloom during the passage of Tropical Storm (TS) Chedza was observed at the southern tip of Madagascar on January 28, 2015. The mechanisms of the chlorophyll bloom were researched with satellite remote sensing data, reanalysis data and Argo buoy data. The results show that there was h...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | Environmental Research Communications |
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| Online Access: | https://doi.org/10.1088/2515-7620/ad1842 |
| _version_ | 1797361770151542784 |
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| author | Qi Feng Hao Shen Guohao Zhu Liqiong Zhang Yaoyao Zhou LÜ Haibin |
| author_facet | Qi Feng Hao Shen Guohao Zhu Liqiong Zhang Yaoyao Zhou LÜ Haibin |
| author_sort | Qi Feng |
| collection | DOAJ |
| description | A phytoplankton bloom during the passage of Tropical Storm (TS) Chedza was observed at the southern tip of Madagascar on January 28, 2015. The mechanisms of the chlorophyll bloom were researched with satellite remote sensing data, reanalysis data and Argo buoy data. The results show that there was horizontal transport of chlorophyll-a (Chl-a) with the western coastal current of Madagascar and the South East Madagascar Current (SEMC). At the southern tip of Madagascar, there was a tilted anticyclonic eddy moving westward, which promoted the flow of nitrate at depths from 60 m to 100 m northward into Box A for a month. Simultaneously, the SEMC formed another anticyclonic eddy entering Box C. Following the passage of TS Chedza, cyclone vorticity in Box A increased continuously, and the upwelling became stronger with Ekman pumping. At the same time, the barrier layer weakened, the mixed layer deepened, and the thermocline decreased, which can uplift the nitrate to the upper ocean. After the passage of TS Chedza, sufficient photosynthetically active radiation (PAR) facilitated the Chl-a bloom in Box A. This study contributes to the assessment of the ecological impact of ocean eddies at the southern tip of Madagascar. |
| first_indexed | 2024-03-08T15:58:13Z |
| format | Article |
| id | doaj.art-1987d0ba822e4e70a186487dd31d37cc |
| institution | Directory Open Access Journal |
| issn | 2515-7620 |
| language | English |
| last_indexed | 2024-03-08T15:58:13Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Communications |
| spelling | doaj.art-1987d0ba822e4e70a186487dd31d37cc2024-01-08T12:27:12ZengIOP PublishingEnvironmental Research Communications2515-76202024-01-016101100110.1088/2515-7620/ad1842Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar islandQi Feng0Hao Shen1Guohao Zhu2Liqiong Zhang3Yaoyao Zhou4LÜ Haibin5https://orcid.org/0000-0001-8007-6619Jiangsu Key Laboratory of Marine Bioresources and Environment /Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University , Lianyungang, Jiangsu Province, People’s Republic of China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of China; Lianyungang Meteorological Bureau, Lianyungang, Jiangsu province, People’s Republic of China; School of Marine Technology and Geomatics, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of ChinaSchool of Marine Technology and Geomatics, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of ChinaSchool of Marine Technology and Geomatics, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of ChinaLianyungang Meteorological Bureau, Lianyungang, Jiangsu province, People’s Republic of China; School of Marine Technology and Geomatics, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of ChinaLianyungang Meteorological Bureau, Lianyungang, Jiangsu province, People’s Republic of China; School of Marine Technology and Geomatics, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of ChinaJiangsu Key Laboratory of Marine Bioresources and Environment /Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University , Lianyungang, Jiangsu Province, People’s Republic of China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of China; School of Marine Technology and Geomatics, Jiangsu Ocean University , Lianyungang, Jiangsu province, People’s Republic of ChinaA phytoplankton bloom during the passage of Tropical Storm (TS) Chedza was observed at the southern tip of Madagascar on January 28, 2015. The mechanisms of the chlorophyll bloom were researched with satellite remote sensing data, reanalysis data and Argo buoy data. The results show that there was horizontal transport of chlorophyll-a (Chl-a) with the western coastal current of Madagascar and the South East Madagascar Current (SEMC). At the southern tip of Madagascar, there was a tilted anticyclonic eddy moving westward, which promoted the flow of nitrate at depths from 60 m to 100 m northward into Box A for a month. Simultaneously, the SEMC formed another anticyclonic eddy entering Box C. Following the passage of TS Chedza, cyclone vorticity in Box A increased continuously, and the upwelling became stronger with Ekman pumping. At the same time, the barrier layer weakened, the mixed layer deepened, and the thermocline decreased, which can uplift the nitrate to the upper ocean. After the passage of TS Chedza, sufficient photosynthetically active radiation (PAR) facilitated the Chl-a bloom in Box A. This study contributes to the assessment of the ecological impact of ocean eddies at the southern tip of Madagascar.https://doi.org/10.1088/2515-7620/ad1842chlorophylleddyupwellingmadagascar |
| spellingShingle | Qi Feng Hao Shen Guohao Zhu Liqiong Zhang Yaoyao Zhou LÜ Haibin Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island Environmental Research Communications chlorophyll eddy upwelling madagascar |
| title | Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island |
| title_full | Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island |
| title_fullStr | Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island |
| title_full_unstemmed | Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island |
| title_short | Chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island |
| title_sort | chlorophyll bloom triggered by tropical storm chedza at the southern tip of madagascar island |
| topic | chlorophyll eddy upwelling madagascar |
| url | https://doi.org/10.1088/2515-7620/ad1842 |
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