An examination of high latitude upper mesosphere dynamic stability using the Nippon/Norway Svalbard Meteor Radar

被引：17

作者：

Hall, CM ^{[1
]}

Aso, T

Tsutsumi, M

机构：

[1] Univ Tromso, Fac Sci, Geophys Observ, N-9037 Tromso, Norway

[2] Natl Inst Polar Res, Itabashi Ku, Tokyo 1738515, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2002年 / 29卷 / 08期

关键词：

D O I：

10.1029/2001GL014229

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[1] Using wind measurements from the recently installed Nippon/Norway Svalbard Meteor Radar, (NSMR) at 78degreesN, 16degreesE, we have derived wind shears, and, combining these with model Brunt-Vaisala frequencies, have determined estimates of the gradient Richardson Number. These Richardson Number estimates parameterise the degree of stability of the upper mesosphere at a height of around 90 km. We find indications of dynamic instability in spring and autumn, with greater stability in summer.

引用

页数：3

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