Satellite evidence of harmful algal blooms and related oceanographic features in the Bohai Sea during autumn 1998

Dan Ling Tang, Hiroshi Kawamura, Im Sang Oh, Joe Baker

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)


Harmful algal blooms (HABs) are truly global marine phenomena of increasing significance. Some HAB occurrences are different to observe because of their high spatial and temporal variability and their advection, once formed, by surface currents. A serious HAB occurred in the Bohai Sea during autumn 1998, causing the largest fisheries economic loss. The present study analyzes the formation, distribution, and advection of HAB using satellite SeaWiFS ocean color data and other oceanographic data. The results show that the bloom originated in the western coastal waters of the Bohai Sea in early September, and developed southeastward when sea surface temperature (SST) increased to 25-26 °C. The bloom with a high Chl-a concentration (6.5 mg m -3 ) in center portion covered an area of 60 × 65 km 2 . At the end of September, the bloom decayed when SST decreased to 22-23 °C. The HAB may have been initiated by a combination of the river discharge nutrients in the west coastal waters and the increase of SST; afterwards it may have been transported eastward by the local circulation that was enhanced by northwesterly winds in late September and early October.

Original languageEnglish
Pages (from-to)681-689
Number of pages9
JournalAdvances in Space Research
Issue number4
Publication statusPublished - 2006


  • Bohai Sea
  • China
  • Chl-a
  • Harmful algal bloom (HAB)
  • Oceanographic feature
  • Satellite remote sensing
  • SeaWiFS

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)


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