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Evaporation tagging and atmospheric water budget analysis with WRF: A regional precipitation recycling study for West Africa

Arnault, Joel; Knoche, Richard; Wei, Jianhui; Kunstmann, Harald

Abstract:
Regional precipitation recycling is the measure of the contribution of local evaporation E to local precipitation. This study provides a set of two methods developed in the Weather Research and Forecasting WRF model system for investigating regional precipitation recycling mechanisms: (1) tracking of tagged atmospheric water species originating from evaporation in a source region, ie E‐tagging, and (2) three‐dimensional budgets of total and tagged atmospheric water species. These methods are used to quantify the effect of return flow and nonwell vertical mixing neglected in the computation of the bulk precipitation recycling ratio. The developed algorithms are applied to a WRF simulation of the West African Monsoon 2003. The simulated region is characterized by vertical wind shear condition, i.e., southwesterlies in the low levels and easterlies in the mid‐levels, which favors return flow and nonwell vertical mixing. Regional precipitation recycling is investigated in 100 × 100 and 1000 × 1000 km2 areas. A prerequisite condition for evaporated water to contribute to the precipitation process in both areas is that it is lifted to the mid‐levels where hydrometeors are produced. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000056811
Veröffentlicht am 25.01.2021
Originalveröffentlichung
DOI: 10.1002/2015WR017704
Scopus
Zitationen: 23
Web of Science
Zitationen: 23
Dimensions
Zitationen: 27
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 0043-1397, 0148-0227, 1944-7973
KITopen-ID: 1000056811
HGF-Programm 12.02.03 (POF III, LK 01) Regional Climate-and Water Cycle Variab.
Erschienen in Water resources research
Verlag John Wiley and Sons
Band 52
Heft 3
Seiten 1544-1567
Nachgewiesen in Web of Science
Dimensions
Scopus
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