Thermospheric gravity waves in Fabry-Perot Interferometer measurements of the 630.0 nm OI line

被引:13
作者
Ford, E. A. K. [1 ]
Aruliah, A. L. [1 ]
Griffin, E. M. [1 ]
McWhirter, I. [1 ]
机构
[1] UCL, Dept Phys & Astron, Atmospher Phys Lab, London WC1E 6BT, England
关键词
ionosphere; ionosphere-atmosphere interactions; meterology and athmospheric dynamics; thermospheric dynamics; waves and tides;
D O I
10.5194/angeo-24-555-2006
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Gravity waves are an important feature of mesosphere - lower thermosphere (MLT) dynamics, observed using many techniques and providing an important mechanism for energy transfer between atmospheric regions. It is known that some gravity waves may propagate through the mesopause and reach greater altitudes before eventually "breaking" and depositing energy. The generation, propagation, and breaking of upper thermospheric gravity waves have not been studied directly often. However, their ionospheric counterparts, travelling ionospheric disturbances (TIDs), have been extensively studied in, for example, radar data. At high latitudes, it is believed localised auroral activity may generate gravity waves in-situ. Increases in sensor efficiency of Fabry-Perot Interferometers (FPIs) located in northern Scandinavia have provided higher time resolution measurements of the auroral oval and polar cap atomic oxygen red line emission at 630.0 nm. A Lomb-Scargle analysis of this data has shown evidence of gravity wave activity with periods ranging from a few tens of minutes to several hours. Oscillations are seen in the intensity of the line as well as the temperatures and line of sight winds. Instruments are located in Sodankyla, Finland; Kiruna, Sweden; Skibotn, Norway, and Svalbard in the Arctic Ocean. A case study is presented here, where a wave of 1.8 h period has a phase speed of 250 ms(-1) with a propagation angle of 302 degrees, and a horizontal wavelength of 1600 km. All the FPIs are colocated with EISCAT radars, as well as being supplemented by a range of other instrumentation. This allows the waves found in the FPI data to be put in context with the ionosphere and atmosphere system. Consequently, the source region of the gravity waves can be determined.
引用
收藏
页码:555 / 566
页数:12
相关论文
共 32 条
[1]  
[Anonymous], 1990, DYNAMICS ATMOSPHERIC
[2]  
Arnold NF, 1998, ANN GEOPHYS-ATM HYDR, V16, P1392, DOI 10.1007/s00585-998-1392-z
[3]   First tristatic studies of meso-scale ion-neutral dynamics and energetics in the high-latitude upper atmosphere using collocated FPIs and EISCAT radar [J].
Aruliah, AL ;
Griffin, EM ;
McWhirter, I ;
Aylward, AD ;
Ford, EAK ;
Charalambous, A ;
Kosch, MJ ;
Davis, CJ ;
Howells, VSC .
GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (03) :L038021-4
[4]   First direct evidence of meso-scale variability on ion-neutral dynamics using co-located tristatic FPIs and EISCAT radar in Northern Scandinavia [J].
Aruliah, AL ;
Griffin, EM ;
Aylward, AD ;
Ford, EAK ;
Kosch, MJ ;
Davis, CJ ;
Howells, VSC ;
Pryse, SE ;
Middleton, HR ;
Jussila, J .
ANNALES GEOPHYSICAE, 2005, 23 (01) :147-162
[5]   Evidence of meso-scale structure in the high-latitude thermosphere [J].
Aruliah, AL ;
Griffin, E .
ANNALES GEOPHYSICAE, 2001, 19 (01) :37-46
[6]   Morphology of large-scale traveling atmospheric disturbances in the polar thermosphere [J].
Balthazor, RL ;
Moffett, RJ .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1999, 104 (A1) :15-24
[7]   OPTICAL OBSERVATIONS OF GRAVITY-WAVES IN THE AURORAL-ZONE [J].
DEDEUGE, MA ;
GREET, PA ;
JACKA, F .
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1994, 56 (05) :617-629
[8]   GRAVITY-WAVE GENERATION AND PROPAGATION DURING GEOMAGNETIC STORMS OVER KIRUNA (67.8-DEGREES-N, 20.4-DEGREES-E) [J].
FAGUNDES, PR ;
ARULIAH, AL ;
REES, D ;
BITTENCOURT, JA .
ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1995, 13 (04) :358-366
[9]   STARE - NEW RADAR AURORAL BACKSCATTER EXPERIMENT IN NORTHERN SCANDINAVIA [J].
GREENWALD, RA ;
WEISS, W ;
NIELSEN, E ;
THOMSON, NR .
RADIO SCIENCE, 1978, 13 (06) :1021-1039
[10]  
HARGREAVES J.K., 1979, UPPER ATMOSPHERE SOL