A study on polar atmospheric tide by EISCAT and other radars and numerical modellings

EISCAT 和其他雷达及数值模拟对极地大气潮的研究

• 批准号: 14340146
• 负责人: ASO Takehiko
• 金额: $ 6.02万
• 依托单位: NATIONAL INSTITUTE OF POLAR RESEARCH
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340146/
• 关键词: EISCAT radar; atmospheric tide; meteor radar; numerical modeling; middle atmosphere; GCM; planetary wave; gravity wave; 大気光・オーロラ光学観測; 大気潮汐波・重力波; 中層大気; 電磁圏ダイナミックス; オーロラ大気光トモグラフィ

Through studies on polar atmospheric tide at MLT regions by EISCAT and other arctic and also Antarctic radars and modelings, it is found that altitude profiles of EISCAT, SSR and meteor radar tide are by and large contiguous or consistent in various respects, that climatology of tides are clarified in which, e.g., latitudinal comparison of diurnal component between Tromso and Svalbard is compatible with high-latitude (1,-2) mode and observed spectra around semidiurnal component are consistent with GCM, that zonal study between Tromso and Poker Flat suggests summertime non-migrating semidiurnal mode is not quite obvious as compared with Antarctic, consistent with modeled process and observed north-south asymmetry in stratospheric planetary wave activity, that short period 6 and 8 hr tide and gravity wave are extracted to open a scope for comparative study with numerical models, that GCM model tells us both diurnal and semidiurnal non-migrating tides are relevant with stationary planetary wave at lower heights and also gravity wave happens to enhance or weaken diurnal tide, that linearized, steady model passably delineates terdiurnal and non-migrating signatures, while even most advanced WACCM model remains to fully interpret details of observed seasonal tidal climatology.

通过EISCAT和其他北极、南极雷达和模型对MLT地区极地大气潮的研究，发现EISCAT、SSR和流星雷达潮汐的高度剖面在各个方面大体连续或一致，潮汐的气候学特征澄清其中，例如，特罗姆瑟和斯瓦尔巴群岛之间的日成分的纬度比较与高纬度（1，-2）模式兼容并观察到半日成分周围的光谱与 GCM 一致，特罗姆瑟和扑克平地之间的纬向研究表明夏季非迁移半日模式与南极相比不太明显，与模拟过程和观测到的平流层行星波活动的南北不对称性一致，即提取短周期的 6 小时和 8 小时潮汐和重力波，为与数值模型进行比较研究开辟了空间，GCM 模型告诉我们日潮和半日潮非迁移潮汐与较低高度的静止行星波有关，并且重力波恰好会增强或减弱日潮，线性化、稳定的模型可以很好地描绘昼夜和非迁移特征，而即使是最先进的 WACCM 模型仍然可以充分解释细节观测到的季节性潮汐气候学。

项目成果

Manson, A.H., C.E.Meek, T.Chshyolkova, S.K.Avery, D.Thorsen, J.W.MacDougall, W.Hocking, Y.Murayama, K.Igarashi, S.P.Namboothiri, P.Kishore: "Longitudinal and latitudinal Variations in Dynamic Characteristics of the MLT (70-95km) : A Study Involving the CU

Manson, A.H., C.E.Meek, T.Chshyolkova, S.K.Avery, D.Thorsen, J.W.MacDougall, W.Hocking, Y.Murayama, K.Igarashi, S.P.Namboothiri, P.Kishore：“

Aso, T.: "An overview of the terdiurnal tide observed by polar radars and optics"Adv.Polar Upper Atmos.Res.. 17. 167-176 (2003)

Aso, T.：“极地雷达和光学观测到的昼夜潮汐概述”Adv.Polar Upper Atmos.Res.. 17. 167-176 (2003)

Yamashita, K., S.Miyahara, Y.Miyoshi, K.Kawano, J.Ninomiya: "Seasonal variation of non-migrating semidiurnal tide in the polar MLT region in a general circulation model"J.Atmos.Solar Terr.Phys.. 64. 1083-1094 (2002)

Yamashita，K.，S.Miyahara，Y.Miyoshi，K.Kawano，J.Ninomiya：“大气环流模型中极地MLT地区非迁移半日潮的季节变化”J.Atmos.Solar Terr.Phys。

A comparison of meteor and middle frequency radar kilometer scale MLT dynamics at 70゜N

70°N 处流星和中频雷达公里级 MLT 动力学比较

• 发表时间: 2005
• 期刊: J.Atmos.Solar-Terr.Phys. (in press)
• 作者: Hall;C.M.;T.Aso;M.Tsutsumi;S.Nozawa;C.E.Meek;A.H.Manson
• 通讯作者: A.H.Manson

Murphy, D.J., M.Tsutsumi, D.M.Riggin, G.O.L.Jones, R.A.Vincent, M.E.Hagan, S.K.Avery: "Observations of a non-migrating component of the semidiurnal tide over Antarctica"Journal of Geophysical Research. (in press). (2003)

Murphy, D.J.、M.Tsutsumi、D.M.Riggin、G.O.L.Jones、R.A.Vincent、M.E.Hagan、S.K.Avery：“南极洲半日潮汐非迁移成分的观测”地球物理研究杂志。