 |
| Titel |
Extracting statistical parameters of extreme precipitation from a NWP model |
| VerfasserIn |
J. Eliasson, O. Rögnvaldsson, T. Jonsson |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 11 ; Nr. 13, no. 11 (2009-11-25), S.2233-2240 |
| Datensatznummer |
250012060
|
| Publikation (Nr.) |
 copernicus.org/hess-13-2233-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Precipitation simulations on an 8×8 km grid using the PSU/NCAR
Mesoscale Model MM5 are used to estimate the M5 and Ci statistical
parameters in order to support the M5 map used for flood estimates by
Icelandic engineers. It is known a priori that especially wind anomalies
occur on a considerably smaller scale than 8 km. The simulation period used
is 1962–2005 and 73 meteorological stations have records long enough in
this period to provide a validation data set. Of these only one station is
in the central highlands, so the highland values of the existing M5 map are
estimates. A comparison between the simulated values and values based on
station observations set shows an M5 average difference
(observed-simulated) of −5 mm/24 h with a standard deviation of 17 mm,
3 outliers excluded. This is within expected limits, computational and
observational errors considered. A suggested correction procedure brings
these values down to 4 mm and 11 mm, respectively. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|