Mean winds of the mesosphere and lower thermosphere at 52° N in the period 1988-2000

被引：25

作者：

Middleton, HR ^{[1
]}

Mitchell, NJ

Muller, HG

机构：

[1] Univ Wales, Dept Phys, Aberystwyth SY23 3BZ, Dyfed, Wales

[2] Cranfield Univ, Royal Mil Coll Sci, Swindon SN6 8LA, Wilts, England

来源：

ANNALES GEOPHYSICAE | 2002年 / 20卷 / 01期

关键词：

meteorology and atmospheric dynamics climatology; general circulation; middle atmospheric dynamics;

D O I：

10.5194/angeo-20-81-2002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A meteor radar in the UK (near 52degrees N) has been used to measure the mean winds of the mesosphere/lower-thermosphere (MLT) region over the period 1988-2000. The seasonal course and interannual variability is characterised and comparisons are made with a number of models. Annual mean wind trends were found to be +0.37 ms(-1) yr(-1) for the zonal component and +0.157 ms(-1) yr(-1) for the meridional component. Seasonal means revealed significant trends in the case of meridional winds in spring (+0.38 ms(-1) yr(-1)) and autumn (+0.29 ms(-1) yr(-1)), and zonal winds in summer (+0.48 ms(-1) yr(-1)) and autumn (+0.38 ms(-1) yr(-1)). Significant correlation coefficients, R, between the sunspot number and seasonal mean wind are found in four instances. In the case of the summer zonal winds, R = +0.732; for the winter meridional winds, R = -0.677; for the winter zonal winds, R = -0.472; and for the autumn zonal winds R = +0.508.

引用

页码：81 / 91

页数：11

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