Abstract
The whole atmosphere model GAIA is employed to shed light on atmospheric response to the 2009 major stratosphere sudden warming (SSW) from the ground to exobase. Distinct features are revealed about SSW impacts on thermospheric temperature and density above 100 km altitude. (1) The effect is primarily quasi-semidiurnal in tropical regions, with warming in the noon and pre-midnight sectors and cooling in the dawn and dusk sectors. (2) This pattern exists at all altitudes above 100 km, with its phase being almost constant above 200 km, but propagates downward in the lower thermosphere between 100 and 200 km. (3) The northern polar region experiences warming in a narrow layer between 100 and 130 km, while the southern polar region experiences cooling throughout 100-400 km altitudes. (4) The global net thermal effect on the atmosphere above 100 km is a cooling of approximately -12 K. These characteristics provide us with an urgently needed global context to better connect and understand the increasing upper atmosphere observations during SSW events. Key Points Strong LT dependence in tropical regions Fast downward phase propagation between 100 and 200 km Global net cooling of -12 K on the atmosphere above 100 km
| Original language | English |
|---|---|
| Pages (from-to) | 635-640 |
| Number of pages | 6 |
| Journal | Geophysical Research Letters |
| Volume | 40 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Feb 16 2013 |
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All Science Journal Classification (ASJC) codes
- Geophysics
- Earth and Planetary Sciences(all)
Cite this
Upper atmosphere response to stratosphere sudden warming : Local time and height dependence simulated by GAIA model. / Liu, Huixin; Jin, Hidekatsu; Miyoshi, Yasunobu; Fujiwara, Hitoshi; Shinagawa, Hiroyuki.
In: Geophysical Research Letters, Vol. 40, No. 3, 16.02.2013, p. 635-640.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Upper atmosphere response to stratosphere sudden warming
T2 - Local time and height dependence simulated by GAIA model
AU - Liu, Huixin
AU - Jin, Hidekatsu
AU - Miyoshi, Yasunobu
AU - Fujiwara, Hitoshi
AU - Shinagawa, Hiroyuki
PY - 2013/2/16
Y1 - 2013/2/16
N2 - The whole atmosphere model GAIA is employed to shed light on atmospheric response to the 2009 major stratosphere sudden warming (SSW) from the ground to exobase. Distinct features are revealed about SSW impacts on thermospheric temperature and density above 100 km altitude. (1) The effect is primarily quasi-semidiurnal in tropical regions, with warming in the noon and pre-midnight sectors and cooling in the dawn and dusk sectors. (2) This pattern exists at all altitudes above 100 km, with its phase being almost constant above 200 km, but propagates downward in the lower thermosphere between 100 and 200 km. (3) The northern polar region experiences warming in a narrow layer between 100 and 130 km, while the southern polar region experiences cooling throughout 100-400 km altitudes. (4) The global net thermal effect on the atmosphere above 100 km is a cooling of approximately -12 K. These characteristics provide us with an urgently needed global context to better connect and understand the increasing upper atmosphere observations during SSW events. Key Points Strong LT dependence in tropical regions Fast downward phase propagation between 100 and 200 km Global net cooling of -12 K on the atmosphere above 100 km
AB - The whole atmosphere model GAIA is employed to shed light on atmospheric response to the 2009 major stratosphere sudden warming (SSW) from the ground to exobase. Distinct features are revealed about SSW impacts on thermospheric temperature and density above 100 km altitude. (1) The effect is primarily quasi-semidiurnal in tropical regions, with warming in the noon and pre-midnight sectors and cooling in the dawn and dusk sectors. (2) This pattern exists at all altitudes above 100 km, with its phase being almost constant above 200 km, but propagates downward in the lower thermosphere between 100 and 200 km. (3) The northern polar region experiences warming in a narrow layer between 100 and 130 km, while the southern polar region experiences cooling throughout 100-400 km altitudes. (4) The global net thermal effect on the atmosphere above 100 km is a cooling of approximately -12 K. These characteristics provide us with an urgently needed global context to better connect and understand the increasing upper atmosphere observations during SSW events. Key Points Strong LT dependence in tropical regions Fast downward phase propagation between 100 and 200 km Global net cooling of -12 K on the atmosphere above 100 km
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UR - http://www.scopus.com/inward/citedby.url?scp=84878198249&partnerID=8YFLogxK
U2 - 10.1002/grl.50146
DO - 10.1002/grl.50146
M3 - Article
AN - SCOPUS:84878198249
VL - 40
SP - 635
EP - 640
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 3
ER -