Episodic events imposed on the seasonal nutrient dynamics of an upwelling system off northeastern Taiwan

Chung Chi Chen, Shih Chieh Hsu, Sen Jan, Gwo Ching Gong

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An upwelling center has been frequently observed on the shelf break of the East China Sea (ECS) off northeastern Taiwan, where the Kuroshio encounters an abrupt shoaling topography. The region is also located under the track of Asian dust (AD) storms and frequently disturbed by typhoons. To examine the seasonal nutrient dynamics of the upwelling and the potential impacts of these episodic events, transect stations across the upwelling center were visited at intervals of 1-3. months from November 2003 to January 2005. The results of the water temperature profiles indicated that the upwelling persisted throughout the year with the most intensified events occurring in winter. Seasonally, a higher nitrate concentration was observed during the stronger upwelling period. The highest nitrate value was however observed during an AD storm, with an average value of 8.3. μM for the top 30. m. Interestingly, the N/P ratio was larger than 16 during these episodic events, and the N/P ratios were equal to or smaller than 16 during other periods. On average, the estimated values from wet deposition constituted 17.3% of the total estimated nitrogen input. This suggests that atmospheric deposition, particularly during the episodic events, might be an important external nutrient source.

Original languageEnglish
Pages (from-to)128-135
Number of pages8
JournalJournal of Marine Systems
Volume141
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

dust storms
episodic event
nutrient dynamics
Taiwan
upwelling
nitrates
typhoons
wet deposition
East China Sea
atmospheric deposition
nutrients
temperature profiles
dust storm
topography
water temperature
winter
nitrate
nitrogen
shelf break
temperature profile

Keywords

  • Atmospheric forcing
  • Dissolved inorganic matter
  • East China Sea
  • Kuroshio Water
  • Seasonal variations
  • Upwelling

ASJC Scopus subject areas

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

Episodic events imposed on the seasonal nutrient dynamics of an upwelling system off northeastern Taiwan. / Chen, Chung Chi; Hsu, Shih Chieh; Jan, Sen; Gong, Gwo Ching.

In: Journal of Marine Systems, Vol. 141, 01.01.2015, p. 128-135.

Research output: Contribution to journalArticle

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