First results of warm mesospheric temperature over Gadanki (13.5°N, 79.2°E) during the sudden stratospheric warming of 2009

被引：17

作者：

Sridharan, S. ^{[1
]}

Raghunath, K. ^{[1
]}

Sathishkumar, S. ^{[2
]}

Nath, D. ^{[1
]}

机构：

[1] Natl Atmospher Res Lab, Gadanki, India

[2] Indian Inst Geomagnetism, Equatorial Geophys Res Lab, Tirunelveli, India

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2010年 / 72卷 / 14-15期

关键词：

Major sudden stratospheric warming; Gravity waves; Planetary waves; Meridional circulation; GRAVITY-WAVE ACTIVITY; LOWER THERMOSPHERE; LOW-LATITUDE; LIDAR; CANADA;

D O I：

10.1016/j.jastp.2010.06.003

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Rayleigh lidar observations at Gadanki (13.5 degrees N, 79.2 degrees E) show an enhancement of the nightly mean temperature by 10-15 K at altitudes 70-80 km and of gravity wave potential energy at 60-70 km during the 2009 major stratospheric warming event. An enhanced quasi-16-day wave activity is observed at 50-70 km in the wavelet spectrum of TIMED-SABER temperatures, possibly due to the absence of a critical level in the low-latitude stratosphere because of less westward winds caused by this warming event. The observed low-latitude mesospheric warming could be due to wave breaking, as waves are damped at 80 km. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1139 / 1146

页数：8

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