Long-term trends and the effect of solar cycle variations on mesospheric winter temperatures over Longyearbyen, Svalbard (78°N)

被引：14
|
作者：
Holmen, Silje E. [1 ,2 ,3 ]
Dyrland, Margit E. [1 ,2 ]
Sigernes, Fred [1 ,2 ]
机构：
[1] Univ Ctr Svalbard, Longyearbyen, Norway
[2] Birkeland Ctr Space Sci, Bergen, Norway
[3] UiT Arctic Univ Norway, Tromso Geophys Observ, Tromso, Norway
来源：
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2014年 / 119卷 / 11期
关键词：
airglow; mesosphere; temperature; trend; solar variability; arctic; HYDROXYL AIRGLOW; MESOPAUSE REGION; ROTATIONAL TEMPERATURE; LOWER THERMOSPHERE; MODEL SIMULATIONS; MIDDLE ATMOSPHERE; AURORAL STATION; EMISSION; OH; VARIABILITY;
D O I：
10.1002/2013JD021195
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
This paper gives an update on the long-term trend in hydroxyl (OH*) airglow winter temperatures measured by a 1m Ebert-Fastie spectrometer in Longyearbyen, Svalbard (78 degrees N, 16 degrees E), from 1983 to 2013. The temperatures are derived through synthetic fits of measured airglow spectra of the OH*(6-2) vibrational state. The data set is corrected for seasonal variations by subtracting the mean climatology. Also, solar cycle dependence is investigated. A solar response coefficient of 3.6K +/- 4.0K/100solar flux units (SFU) is calculated from F10.7cm solar radio flux data. After subtraction of the climatology and solar response, the remaining long-term trend is a near-zero trend, -0.2K +/- 0.5K/decade. Trend analysis of monthly temperatures indicates positive trends for November, January, and February and a negative trend for December, but the uncertainties are high.
引用
收藏
页码：6596 / 6608
页数：13
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