Observational Study on Atmospheric and Oceanic Boundary-Layer Structures Accompanying the Okhotsk Anticyclone under Fog and Non-Fog Conditions

• TACHIBANA Yoshihiro

  Institute of Observational Research for Global Change,Japan Agency for Marine-Earth Science and Technology Faculty of Bioresources, Mie University

• IWAMOTO Katsushi

  Institute of Low Temperature Science, Hokkaido University Snow and Ice Research Center, National Research Institute for Earth Science and Disaster Prevention

• OGAWA Hiroko

  Graduate School of Oceanography, Tokai University

• SHIOHARA Mayumi

  Institute of Low Temperature Science, Hokkaido University

• TAKEUCHI Kensuke

  Institute of Observational Research for Global Change, Japan Agency for Marine-Earth Science and Technology

• WAKATSUCHI Masaaki

  Institute of Low Temperature Science, Hokkaido University

抄録

A series of GPS radiosonde and oceanic observations was conducted over the Okhotsk Sea for the first time in July 1998. Under the prevalent anticyclone over the Okhotsk Sea during the observations, distinct differences in the atmospheric and oceanic boundary-layer structure were observed between the fog and non-fog periods. During the fog period, the observed strong surface winds and upward sensible heat fluxes promoted vertical mixing in the atmosphere and ocean. The height of the well-mixed marine boundary layer varied from 200 to 1000m in the atmosphere, and 10 to 15 m in the ocean, respectively. The fog formation occurred when surface air temperature (SAT) was cooler than the underlying sea surface temperature (SST). By trajectory analyses for the observed well-mixed atmospheric boundary layer during the fog period, the boundary-layer air mass that has passed over warm (cool) SST tended to form stratus-like (stratocumulus-like) fog. In the non-fog period, by contrast, atmospheric and oceanic boundary layers were stably stratified due to weak surface winds and downward sensible heat fluxes. Regardless of the air mass trajectory, SAT is warmer than underlying SST during the no-fog period.

収録刊行物

• 気象集誌. 第2輯

  気象集誌. 第2輯 86 (5), 753-771, 2008

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390001206503415296
• NII論文ID: 110006991214
• NII論文ID: 130004435019
• NII書誌ID: AA00702524
• DOI: 10.2151/jmsj.86.753
• ISSN: 21869057
• ISSN: 00261165
• NDL書誌ID: 9686435
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9686435
• Web Site: http://www.jstage.jst.go.jp/article/jmsj/86/5/86_5_753/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10613039
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可