Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.11765/11743
Water vapor radiative effects on short-wave radiation in Spain
Title: Water vapor radiative effects on short-wave radiation in Spain
Authors: Vaquero Martínez, JavierAntón, ManuelOrtiz de Galisteo, José Pablo ORCID RESEARCHERID Autor AEMETRomán, RobertoCachorro, Victoria E.
Keywords: Short-wave; Radiative effect; Radiative efficiency; Water vapor; IWV
Issue Date: 2018
Publisher: Elsevier
Citation: Atmospheric Research. 2018, 205, p. 18-25
Publisher version: https://dx.doi.org/10.1016/j.atmosres.2018.02.001
Abstract: In this work, water vapor radiative effect (WVRE) is studied by means of the Santa Barbara's Disort Radiative Transfer (SBDART) model, fed with integrated water vapor (IWV) data from 20 ground-based GPS stations in Spain. Only IWV data recorded during cloud-free days (selected using daily insolation data) were used in this study. Typically, for SZA = 60.0 ± 0.5° WVRE values are around − 82 and − 66 Wm−2 (first and third quartile), although it can reach up − 100 Wm−2 or decrease to − 39 Wm−2. A power dependence of WVRE on IWV and cosine of solar zenith angle (SZA) was found by an empirical fit. This relation is used to determine the water vapor radiative efficiency (WVEFF = ∂WVRE/∂IWV). Obtained WVEFF values range from − 9 and 0 Wm−2 mm−1 (− 2.2 and 0% mm−1 in relative terms). It is observed that WVEFF decreases as IWV increases, but also as SZA increases. On the other hand, when relative WVEFF is calculated from normalized WVRE, an increase of SZA results in an increase of relative WVEFF. Heating rates were also calculated, ranging from 0.2 Kday−1 to 1.7 Kday−1. WVRE was also calculated at top of atmosphere, where values ranged from 4 Wm−2 to 37 Wm−2
Description: This work was supported by the Spanish Ministry of Economy and Competitiveness through project CGL2014-56255-C2. Support from the Junta de Extremadura (Research Group Grant GR15137) is gratefully acknowledged. Work at the Universidad de Valladolid is supported by project CMT2015-66742-R. Work at the Universidad de Granada was supported by the Andalusia Regional Government (Project P12-RNM-2409) and the Spanish Ministry of Economy and Competitiveness and FEDER funds under the projects CGL2016-81092-R and “Juan de la Cierva-Formación” program (FJCI-2014-22052).
URI: http://hdl.handle.net/20.500.11765/11743
ISSN: 0169-8095
Appears in Collections:Artículos científicos 2015-2018


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