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Volume 51 Supplement 7-8

Special Issue: Dynamics and Structure of the Mesopause Region (DYSMER)

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Observations of mesospheric sporadic sodium layers with the MU radar and sodium lidars

Earth, Planets and Space volume 51, pages 785–797 (1999)Cite this article

Abstract

The dynamical structure of the atmosphere around the sporadic sodium layer at mid-latitude (∼35°N) below 100 km was studied by simultaneous observation with the MU radar at Shigaraki (34.9°N, 136.1°E), and two Na lidars at Shigaraki and in Hachioji (35.6°N, 139.4°E). In the lidar data, fifteen Nas (sporadic sodium layer) events were detected. Wind shear, temperature, and stability indices, at around the time and height of Nas were observed with the MU radar. Strong total wind shear correlated well with Nas, especially when sporadic Es did not accompany. However, no other clear correlations, such as correlations with temperature etc., were found. The result is similar to the report of the lidar observations in Hawaii during the ALOHA-93 campaign (Qian et al., 1998), and suggests a similar generation mechanism between 20°N and 35°N.

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Author notes

  1. Hirohisa Miyagawa

    Present address: Chubu Electric Power Company Inc., Nagoya, Japan

  2. Keiji Kobayashi

    Present address: Japan Defense Agency, Technical Research and Development Institute, Tokyo, Japan

Authors and Affiliations

  1. Radio Atmospheric Science Center, Kyoto University, Uji, Kyoto, Japan

    Hirohisa Miyagawa, Takuji Nakamura & Toshitaka Tsuda

  2. Graduate School of Electrical Engineering, Tokyo Metropolitan University, Hachioji Tokyo, Japan

    Makoto Abo & Chikao Nagasawa

  3. Faculty of Engineering, Shinshu University, Nagano, Japan

    Takuya D. Kawahara, Keiji Kobayashi, Tsukasa Kitahara & Akio Nomura

Authors
  1. Hirohisa Miyagawa
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  2. Takuji Nakamura
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  3. Toshitaka Tsuda
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  4. Makoto Abo
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  5. Chikao Nagasawa
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  6. Takuya D. Kawahara
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  7. Keiji Kobayashi
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  8. Tsukasa Kitahara
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  9. Akio Nomura
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Correspondence to Hirohisa Miyagawa.

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Miyagawa, H., Nakamura, T., Tsuda, T. et al. Observations of mesospheric sporadic sodium layers with the MU radar and sodium lidars. Earth Planet Sp 51, 785–797 (1999). https://doi.org/10.1186/BF03353237

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  • DOI: https://doi.org/10.1186/BF03353237

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