 |
| Titel |
Simulating orographic rainfall with a limited-area, non-hydrostatic atmospheric model under idealized forcing |
| VerfasserIn |
A. Pathirana, S. Herath, T. Yamada |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 5, no. 1 ; Nr. 5, no. 1 (2005-01-27), S.215-226 |
| Datensatznummer |
250002218
|
| Publikation (Nr.) |
 copernicus.org/acp-5-215-2005.pdf |
|
|
|
|
|
| Zusammenfassung |
| A modified version of an operational 3-dimensional, non-hydrostatic, limited-area
atmospheric model (MM5) was used to perform high-resolution, idealized simulations of
the
interaction of an infinitely long single ridge with a steady, lateral large-scale wind
field. The effect of different mountain ridge dimensions, wind speeds and patterns
and
moisture profiles on the quantity and distribution of orographic rainfall was
investigated. The simulations demonstrated a number of commonly observed mountain
flow
features like formation of cap clouds, foehn wall, convective break-out associated
with
mountain topography, interaction of downslope winds with sea breeze, and different
stages
of cumulus development. It was found that the rainfall maxima associated with the
mountain
always occur upstream of the ridge peak. Changing mountain dimensions, wind speeds
and
patterns and moisture profile had clear effects on amount and pattern of accumulated
rainfall. Low wind speeds resulted the maximum accumulated rainfall to occur
considerable
distance upstream of ridge peak. Reversal of wind directions in upper atmosphere
caused
rainfall to be largely restricted to the wind-side of the peak. The observed rainfall
patterns are explained by the different flow patterns observed in the model output. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|