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024 7 _ |a 10.1029/2011JD016443
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024 7 _ |a 0141-8637
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024 7 _ |a 2128/20899
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037 _ _ |a PreJuSER-22499
041 _ _ |a eng
082 _ _ |a 550
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|a Meteorology & Atmospheric Sciences
100 1 _ |0 P:(DE-HGF)0
|a Peevey, T.R.
|b 0
245 _ _ |a Investigation of double tropopause spatial and temporal global variability utilizing High Resolution Dynamics Limb Sounder temperature observations
260 _ _ |a Washington, DC
|b Union
|c 2012
300 _ _ |a 14
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440 _ 0 |0 6393
|a Journal of Geophysical Research D: Atmospheres
|v 117
|x 0148-0227
|y D01105
500 _ _ |3 POF3_Assignment on 2016-02-29
500 _ _ |a The work discussed in this paper is funded by NASA's AURA satellite program under contract NAS5-97046. The authors would like to thank the HIRDLS Team for access to the data and their support of this work. Special thanks go to Bill Randel and Laura Pan for valuable discussions on the complexities of the extratropical UTLS.
520 _ _ |a This study examines the seasonal variation of the double tropopause (DT) using data from the High Resolution Dynamics Limb Sounder. The combination of high data density and high vertical resolution available with this satellite instrument allows for the detailed analysis of fine-scale structures such as the DT. The spatial distribution of DT frequency is examined for all seasons from 2005 to 2007. Global analysis of this distribution reveals that DTs have a strong tendency to follow the zonal wind pattern and are present all year over the Andes. Moreover, during Northern Hemisphere winter/spring, there is a 15% decrease in the DT frequency over the eastern Pacific and western Atlantic, two regions of wave breaking produced from a weakening of the zonal flow. Significant DT thickness values are also present over these regions, but are found to extend further poleward than the corresponding frequency pattern. A time series of DT frequencies is analyzed and shows an increase in daily frequencies during 2006 that highlights the interannual variability of this thermal structure. For the first time, DT duration is investigated in the extratropics utilizing a Hovmoller diagram of DT frequency. This representation highlights two preferred regions of formation, the Pacific and Atlantic. The slope of the feature gives it a speed of 18 m/s in the Northern Hemisphere and a slightly faster speed for the Southern Hemisphere. These speeds and the corresponding structures highlight a potential connection between upper tropospheric waves and DTs.
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700 1 _ |0 P:(DE-HGF)0
|a Gille, J.C.
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|a Randall, C.E.
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|a Kunz, A.
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|t Journal of Geophysical Research
|t Journal of geophysical research / Atmospheres
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|y 2012
856 7 _ |u http://dx.doi.org/10.1029/2011JD016443
856 4 _ |u https://juser.fz-juelich.de/record/22499/files/2011JD016443.pdf
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