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| Titel |
High time resolution boundary layer description using combined remote sensing instruments |
| VerfasserIn |
C. Gaffard, J. Nash, E. Walker, T. J. Hewison, J. Jones, E. G. Norton |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 9 ; Nr. 26, no. 9 (2008-09-05), S.2597-2612 |
| Datensatznummer |
250016212
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| Publikation (Nr.) |
 copernicus.org/angeo-26-2597-2008.pdf |
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| Zusammenfassung |
| Ground based remote sensing systems for future observation operations will
allow continuous monitoring of the lower troposphere at temporal resolutions
much better than every 30 min. Observations which may be considered
spurious from an individual instrument can be validated or eliminated when
considered in conjunction with measurements from other instruments observing
at the same location. Thus, improved quality control of atmospheric profiles
from microwave radiometers and wind profilers should be sought by
considering the measurements from different systems together rather than
individually. In future test bed deployments for future operational
observing systems, this should be aided by observations from laser
ceilometers and cloud radars. Observations of changes in atmospheric
profiles at high temporal resolution in the lower troposphere are presented
from a 12 channel microwave radiometer and 1290 MHz UHF wind profiler
deployed in southern England during the CSIP field experiment in July/August
2005. The observations chosen were from days when thunderstorms occurred in
southern England. Rapid changes near the surface in dry layers are
considered, both when rain/hail may be falling from above and where the dry
air is associated with cold pools behind organised thunderstorms. Also,
short term variations in atmospheric profiles and vertical stability are
presented on a day with occasional low cloud, when thunderstorms triggered
50 km down wind of the observing site Improved quality control of the
individual remote sensing systems need to be implemented, examining the
basic quality of the underlying observations as well as the final outputs,
and so for instance eliminating ground clutter as far as possible from the
basic Doppler spectra measurements of the wind profiler. In this study, this
was performed manually. The potential of incorporating these types of
instruments in future upper air observational networks leads to the
challenge to improve the observing systems and also to exploit measurements
at high temporal resolution in numerical weather prediction. These examples
are intended to inform potential operational users of the changes in
atmospheric structure that can be observed with the new types of observing
system. |
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