elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

A gridded hourly precipitation dataset for Switzerland using rain-gauge analysis and radar-based disaggregation

Wüest, Marc und Frei, Christoph und Altenhoff, Adrian und Hagen, Martin und Litschi, Michael (2010) A gridded hourly precipitation dataset for Switzerland using rain-gauge analysis and radar-based disaggregation. International Journal of Climatology, 30, Seiten 1764-1775. DOI: 10.1002/joc.2025. ISSN 0899-8418.

[img]
Vorschau
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
3MB

Offizielle URL: http://onlinelibrary.wiley.com/doi/10.1002/joc.2025/abstracthttp://onlinelibrary.wiley.com/doi/10.1002/joc.2025/abstract

Kurzfassung

Rain gauges and weather radars both constitute important devices for operational precipitation monitoring. Gauges provide accurate yet spotty precipitation estimates, while radars offer high temporal and spatial resolution yet at a limited absolute accuracy. We propose a simple methodology to combine radar and daily rain-gauge data to build up a precipitation dataset with hourly resolution covering a climatological time period. The methodology starts from a daily precipitation analysis, derived from a dense rain-gauge network. A sequence of hourly radar analyses is then used to disaggregate the daily analyses. The disaggregation is applied such as to retain the daily precipitation totals of the rain-gauge analysis, in order to reduce the impact of quantitative radar biases. Hence, only the radar's advantage in terms of temporal resolution is exploited. In this article the disaggregation method is applied to derive a 15-year gridded precipitation dataset at hourly resolution for Switzerland at a spatial resolution of 2 km. Validation of this dataset indicates that errors in hourly intensity and frequency are lower than 25% on average over the Swiss Plateau. In Alpine valleys, however, errors are typically larger due to shielding effects of the radar and the corresponding underestimation of precipitation periods by the disaggregation. For the flatland areas of the Swiss Plateau, the new dataset offers an interesting quantitative description of high-frequency precipitation variations suitable for climatological analyses of heavy events, the evaluation of numerical weather forecasting models and the calibration/operation of hydrological runoff models.

Dokumentart:Zeitschriftenbeitrag
Titel:A gridded hourly precipitation dataset for Switzerland using rain-gauge analysis and radar-based disaggregation
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Wüest, MarcETH Zürich, CH
Frei, ChristophMeteoSchweiz, Zürich, CH
Altenhoff, AdrianETH Zürich, CH
Hagen, MartinDLR, IPA
Litschi, MichaelETH Zürich, CH
Datum:Oktober 2010
Erschienen in:International Journal of Climatology
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:30
DOI :10.1002/joc.2025
Seitenbereich:Seiten 1764-1775
ISSN:0899-8418
Status:veröffentlicht
Stichwörter:Rainfall Switzerland Radar Gauge
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Dr.rer.nat. Martin Hagen
Hinterlegt am:16 Dez 2009 11:41
Letzte Änderung:23 Jul 2015 16:48

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.