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| Titel |
Impacts of boundary layer turbulence and land surface process parameterizations on simulated sea breeze characteristics |
| VerfasserIn |
J.-F. Miao, K. Wyser, D. Chen, H. Ritchie |
| 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 ; 27, no. 6 ; Nr. 27, no. 6 (2009-06-08), S.2303-2320 |
| Datensatznummer |
250016546
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2303-2009.pdf |
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| Zusammenfassung |
| This paper investigates the sensitivity of sea breeze
(SB) simulations to combinations of boundary-layer turbulence and
land-surface process parameterizations implemented in the MM5 mesoscale
meteorological mode for an observed SB case over the Swedish west coast.
Various combinations from four different planetary boundary layer (PBL)
schemes [Blackadar, Gayno-Seaman (GS), Eta, MRF], and two land surface model
(LSM) schemes (SLAB, Noah) with different complexity are designed to
simulate a typical SB case over the Swedish west coast. The simulations are
conducted using two-way interactively nested grids. Simulated 10-m winds are
compared against observed near-surface wind data from the GÖTE2001
campaign to examine the diurnal cycle of wind direction and speed for SB
timing. The SB (vertical) circulation is also compared in the different
experiments. The results show that the different combinations of PBL and LSM
parameterization schemes result in different SB timing and vertical
circulation characteristics. All experiments predict a delayed SB. The
vertical component of the SB circulation varies in the experiments, among
which the GS PBL scheme produces the strongest SB circulation. Evident
differences between the SLAB and Noah LSMs are also found, especially in
maximum of updraft and downdraft velocities of the SB vertical circulation.
The results have significant implications for convective initiation, air
quality studies and other environmental problems in coastal areas. |
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