Spatiotemporal Variation of Cold Eddies in the Upwelling Zone off Northeastern Taiwan Revealed by the Geostationary Satellite Imagery of Ocean Color and Sea Surface Temperature

Chung, Hsiao Wei; Liu, Cheng Chien

doi:10.3390/su11246979

Cited by 4 publications

(7 citation statements)

References 61 publications

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“…Numerous studies have been focused on the offshore upwelling to the Northeast of Taiwan, which is associated with a cyclonic cold dome [7][8][9][10]. Little literature, however, has indicated the existence of coastal upwelling along the Taiwan east coast.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the Taiwan east coast is also influenced by the poleward flowing Kuroshio Current. However, the Kuroshio Current migrates offshore in summer [9,14]; and as a result, its potential influence on the summer upwelling along the Taiwan east coast is unclear and could be limited or secondary.…”

Section: Introductionmentioning

confidence: 99%

“…Remotely sensed SST data have often been used to detect and map upwelling that exhibits local SST anomaly on the sea surface [4,9,10,15,16]. A coastal upwelling event often develops rapidly after a distinct onset and lasts from several days to some weeks, depending on the local condition.…”

Section: Introductionmentioning

confidence: 99%

“…The Himawari-8 SST data, on the other hand, offer unique advantages in the study of the daily development of upwelling events because of its reliability and high spatial (~2 km) and temporal resolutions (10 min) [17,18]. The merits of the Himawari-8 SST data have been recognized in the two recent upwelling studies [9,10], which used Himawari-8 SST data to investigate the upwelling off Northeastern Taiwan. In [9], the upwelling was only visually examined without attempting to explicitly map the upwelling extent; while in [10], a relatively complex gradient-based edge detection algorithm was used to map the upwelling.…”

Section: Introductionmentioning

confidence: 99%

“…The merits of the Himawari-8 SST data have been recognized in the two recent upwelling studies [9,10], which used Himawari-8 SST data to investigate the upwelling off Northeastern Taiwan. In [9], the upwelling was only visually examined without attempting to explicitly map the upwelling extent; while in [10], a relatively complex gradient-based edge detection algorithm was used to map the upwelling. In this study, however, we used a scale-independent and relatively straightforward semiautomatic method developed and proved reliable in a recent upwelling study [4].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Mapping the Coastal Upwelling East of Taiwan Using Geostationary Satellite Data

Huang

Shi

2021

Remote Sensing

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Coastal upwelling is important for coastal ecosystems and the blue economy because of its large productivity and large potential for catching fish. However, coastal upwelling along the Taiwan east coast has received little attention from the research community. This study used five-year daily Himawari-8 geostationary satellite sea surface temperature data to map the coastal upwelling east of Taiwan during the summer monsoon season. We applied a semi-automatic image process technique based on the topographic position index for the quantitative upwelling mapping. The results show clear evidence of seasonal coastal upwelling along the entire Taiwan east coast, mainly under the influence of upwelling-favorable southwesterly/southerly winds. There are three broad upwelling centers along the Taiwan east coast: north, central, and south. The upwelling around the northern center has the longest upwelling season, lasting from May to September. The upwelling extents are larger between June and August during the height of the summer monsoon.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mapping the Coastal Upwelling East of Taiwan Using Geostationary Satellite Data

Huang

Shi

2021

Remote Sensing

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Deriving Ocean Surface Currents: A method using Geostationary Ocean Color Imager hourly data

Liu¹

2021

IEEE Geosci. Remote Sens. Mag.

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Cold Dome Affects Mesozooplankton Communities during the Southwest Monsoon Period in the Southeast East China Sea

Wang

Tseng

Chen

et al. 2023

JMSE

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In order to better understand the cold dome influence on zooplankton community structure, zooplankton samples were collected during the southwest monsoon prevailing period from the southeast waters of the East China Sea. To reduce the bias caused by different sampling months, the samples were collected in June 2018 and in June 2019. An obvious cold dome activity was proven by images of remote sensing satellites during the June 2018 cruise. In contrast, the research area was much affected by open sea high temperature and water masses during the June 2019 cruise. Significant differences in water conditions were demonstrated by surface seawater temperature, salinity, and dissolved oxygen concentrations between the two cruises. Nevertheless, no significant differences were observed concerning mesozooplankton in general, copepods, large crustaceans, other crustaceans, and pelagic molluscs between the June 2018 and June 2019 cruises. However, the mean abundance of gelatinous plankton was significantly different with 1213.08 ± 850.46 (ind./m3) and 2955.93 ± 1904.42 (ind./m3) in June 2018 and June 2019, respectively. Noteworthy, a significantly lower mean abundance of meroplankton, with 60.78 ± 47.32 (ind./m3), was identified in June 2018 compared to 464.45 ± 292.80 (ind./m3) in June 2019. Pearson’s correlation analysis also showed a highly positive correlation of gelatinous plankton and meroplankton with sea surface temperature (p < 0.01). The variation of salinity showed a significant negative correlation with gelatinous plankton abundance (p < 0.05), and a highly significant negative correlation with the abundance of meroplankton (p < 0.01). Only the abundance of meroplankton showed a positive correlation with dissolved oxygen concentrations (p < 0.05). The copepod communities were separated in two groups which were consistent with sampling cruises in 2018 and 2019. Based on the specificity and occupancy of copepods, Macrosetella gracilis, Oithona rigida, Cosmocalanus darwinii, Paracalanus parvus, and Calocalanus pavo were selected as indicator species for the cold dome effect in the study area during June 2018, whereas the indicator species of warm water impact in the open sea were Calanopia elliptica, Subeucalanus pileatus, Paracalanus aculeatus, and Acrocalanus gibber during the June 2019 cruise.

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Spatiotemporal Variation of Cold Eddies in the Upwelling Zone off Northeastern Taiwan Revealed by the Geostationary Satellite Imagery of Ocean Color and Sea Surface Temperature

Cited by 4 publications

References 61 publications

Mapping the Coastal Upwelling East of Taiwan Using Geostationary Satellite Data

Mapping the Coastal Upwelling East of Taiwan Using Geostationary Satellite Data

Deriving Ocean Surface Currents: A method using Geostationary Ocean Color Imager hourly data

Cold Dome Affects Mesozooplankton Communities during the Southwest Monsoon Period in the Southeast East China Sea

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