Ocean tidal cooling effect on summer sea fog over the Okhotsk Sea

Hiroki Tokinaga, Shang Ping Xie

研究成果: Contribution to journalArticle査読

33 被引用数 (Scopus)

抄録

Ocean tide is a periodic phenomenon of the rise and fall of the sea level that depends on the bathymetry and positions of the moon and sun relative to the earth. In the Okhotsk Sea, the ocean tide causes strong vertical mixing in the upper ocean, generating rich structures in summer SST with extraordinarily cold patches on Kashevarov Bank, along the Kuril Islands, northeast of the Terpeniya Peninsula, and inside Shelikhov Bay. The present study analyzes and synthesizes a suite of ship-board and satellite observations, and numerical simulations to investigate the ocean tidal cooling effect on summer sea fog over the Okhotsk Sea. Over the tide-induced cold patches, atmospheric stability increases, and surface wind weakens markedly possibly through suppressed atmospheric vertical mixing. Our analysis of ship-board observations reveals frequent sea-fog occurrence over the cold patches with a maximum exceeding 70% along the Kuril Islands in July-August. Numerical simulations with the Weather Research and Forecasting (WRF) model support that the cold patches cool air temperature, decelerate surface wind, and form a strong surface inversion layer up to 0.5 km high, creating favorable conditions for sea-fog occurrence. The WRF simulation without the tidal cooling effect reduces sea-fog occurrence by more than 20% over cold patches, illustrating the importance of SST products for climate models.

本文言語英語
論文番号D14102
ジャーナルJournal of Geophysical Research Atmospheres
114
14
DOI
出版ステータス出版済み - 7 27 2009
外部発表はい

All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 林業
  • 海洋学
  • 水圏科学
  • 生態学
  • 水の科学と技術
  • 土壌科学
  • 地球化学および岩石学
  • 地表過程
  • 大気科学
  • 地球惑星科学(その他)
  • 宇宙惑星科学
  • 古生物学

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