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Observation of hori...
Observation of horizontal winds in the middle-atmosphere between 30 degrees S and 55 degrees N during the northern winter 2009-2010
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- Baron, P. (författare)
- Japan National Institute of Information and Communications Technology (NICT)
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- Murtagh, Donal, 1959 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Urban, Joachim, 1964 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Sagawa, H. (författare)
- Japan National Institute of Information and Communications Technology (NICT)
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- Ochiai, S. (författare)
- Japan National Institute of Information and Communications Technology (NICT)
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- Kasai, Y. (författare)
- Tokyo Institute of Technology,Japan National Institute of Information and Communications Technology (NICT)
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- Kikuchi, K. (författare)
- Japan National Institute of Information and Communications Technology (NICT)
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- Khosrawi, F. (författare)
- Stockholms universitet,Stockholm University
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- Kornich, H. (författare)
- Sveriges meteorologiska och hydrologiska institut (SMHI),Swedish Meteorological and Hydrological Institute (SMHI)
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- Mizobuchi, S. (författare)
- Japan Aerospace Exploration Agency (JAXA)
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- Sagi, Kazutoshi, 1984 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Yasui, M. (författare)
- Japan National Institute of Information and Communications Technology (NICT)
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(creator_code:org_t)
- 2013-06-25
- 2013
- Engelska.
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Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 13:12, s. 6049-6064
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Abstract
Ämnesord
Stäng
- Although the links between stratospheric dynamics, climate and weather have been demonstrated, direct observations of stratospheric winds are lacking, in particular at altitudes above 30 km. We report observations of winds between 8 and 0.01 hPa (similar to 35-80 km) from October 2009 to April 2010 by the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES) on the International Space Station. The altitude range covers the region between 35-60 km where previous space-borne wind instruments show a lack of sensitivity. Both zonal and meridional wind components were obtained, though not simultaneously, in the latitude range from 30 degrees S to 55 degrees N and with a single profile precision of 7-9 ms(-1) between 8 and 0.6 hPa and better than 20 ms(-1) at altitudes above. The vertical resolution is 5-7 km except in the upper part of the retrieval range (10 km at 0.01 hPa). In the region between 1-0.05 hPa, an absolute value of the mean difference 5 ms(-1)). In the mesosphere, SMILES and ECMWF zonal winds exhibit large differences (>20 ms(-1)), especially in the tropics. We illustrate our results by showing daily and monthly zonal wind variations, namely the semi-annual oscillation in the tropics and reversals of the flow direction between 50-55 degrees N during sudden stratospheric warmings. The daily comparison with ECMWF winds reveals that in the beginning of February, a significantly stronger zonal westward flow is measured in the tropics at 2 hPa compared to the flow computed in the analysis (difference of similar to 20 ms(-1)). The results show that the comparison between SMILES and ECMWF winds is not only relevant for the quality assessment of the new SMILES winds, but it also provides insights on the quality of the ECMWF winds themselves. Although the instrument was not specifically designed for measuring winds, the results demonstrate that space-borne sub-mm wave radiometers have the potential to provide good quality data for improving the stratospheric winds in atmospheric models.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
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- Av författaren/redakt...
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Baron, P.
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Murtagh, Donal, ...
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Urban, Joachim, ...
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Sagawa, H.
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Ochiai, S.
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Kasai, Y.
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Kikuchi, K.
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Khosrawi, F.
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Kornich, H.
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Mizobuchi, S.
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Sagi, Kazutoshi, ...
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Yasui, M.
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visa färre...
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