A Multi-Instrument Measurement of a Mesospheric Front-Like Structure at the Equator

• SHIOKAWA Kazuo

  Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa

• SUZUKI Shin

  Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa

• OTSUKA Yuichi

  Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa

• OGAWA Tadahiko

  Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa

• NAKAMURA Takuji

  Research Institute for Sustainable Humanosphere, Kyoto University, Uji

• MLYNCZAK Manin G.

  Climate Science Branch, NASA Langley Research Center, Hampton

• RUSSELL James M. III

  Department of Physics, Hampton University

書誌事項

タイトル別名

• A Multi-Instrument Measurement of a Mesospheric Front-Like at the Equator Structure
• Multi Instrument Measurement of a Mesospheric Front Like Structure at the Equator

抄録

We have made a comprehensive measurement of a front-like structure in the mesosphere at the equator at Kototabang, Indonesia (0.2°S, 100.3°E), using an airglow imager, an airglow temperature photometer, a meteor radar, and the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on board the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite. The event was detected in airglow images of both OH-band (peak emission altitude: 87 km) and 557.7-nm (96-km) emissions, as an east-west front-like structure propagating northward with a velocity of 52-58 m/s. Wave trains with a horizontal wavelength of 30-70 km were observed after the passage of the front. The airglow intensity decreased for all the mesospheric emissions of OI (557.7 nm), OH-band, O₂-band (altitude: 94 km), and Na (589.3 nm) (90 km) after the front passage. The rotational temperatures of both the OH-band and the O₂-band also decreased ∼10 K. An intense shear in northward wind velocity of 80 m/s/6 km was observed at altitudes of 84-90 km by the meteor radar. The kinetic temperature profile at altitudes of 20-120 km was observed near Kototabang by TIMED/SABER. The front-like structure and trailing waves were similar to those of the mesospheric tidal bore. However, we found that the ducting condition, which is necessary to form a bore, was not satisfied for the observed wave parameters. We speculate that the intense wind shear may play some role for the generation of the front-like structure.

収録刊行物

• 気象集誌. 第2輯

  気象集誌. 第2輯 84A 305-316, 2006

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390001206503129856
• NII論文ID: 110004804555
• NII論文ID: 30014833950
• NII書誌ID: AA00702524
• DOI: 10.2151/jmsj.84a.305
• ISSN: 21869057
• ISSN: 00261165
• NDL書誌ID: 7975074
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7975074
• Web Site: http://www.jstage.jst.go.jp/article/jmsj/84A/0/84A_0_305/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10612676
• 本文言語コード: en
• データソース種別:
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  • NDL-Digital
  • CiNii Articles
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