A surface temperature and moisture intercomparison study of the Weather Research and Forecasting model, in‐situ measurements and satellite observations over the Atacama Desert

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MARC

Fältnamn	Indikatorer	Metadata
000		03980naa a2200373 4500
001		oai:DiVA.org:ltu-74607
003		SwePub
008		190617s2019 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-746072 URI
024	7	a https://doi.org/10.1002/qj.35532 DOI
040		a (SwePub)ltu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Fonseca, Ricardou Luleå tekniska universitet,Rymdteknik4 aut0 (Swepub:ltu)ricfon
245	1 0	a A surface temperature and moisture intercomparison study of the Weather Research and Forecasting model, in‐situ measurements and satellite observations over the Atacama Desert
264		c 2019-05-20
264	1	b John Wiley & Sons,c 2019
338		a print2 rdacarrier
500		a Validerad;2019;Nivå 2;2019-08-14 (johcin)
520		a Good knowledge of the environmental conditions of deserts on Earth is relevant forclimate studies. The Atacama Desert is of particular interest as it is considered tobe the driest region on Earth. We have performed simulations using the WeatherResearch and Forecasting (WRF) model over the Atacama Desert for two week-longperiods in the austral winter season coincident with surface temperature and relativehumidity in-situ observations at three sites. We found that the WRF model generallyoverestimates the daytime surface temperature, with biases of up to 11◦C, despitegiving a good simulation of the relative humidity. In order to improve the agree-ment with observed measurements, we conducted sensitivity experiments in whichthe surface albedo, soil moisture content and five tuneable parameters in the NoahLand Surface Model (namely soil porosity, soil suction, saturated soil hydraulic con-ductivity, thebparameter used in hydraulic functions and the quartz fraction) areperturbed. We concluded that an accurate simulation is not possible, most likelybecause the Noah Land Surface Model does not have a groundwater table that maybe shallow in desert regions. The WRF-predicted land surface temperature is alsoevaluated against that estimated from the Moderate Resolution Imaging Spectrora-diometer (MODIS) instrument. While at night the satellite-derived and ground-basedmeasurements are generally in agreement, during the day MODIS estimates aretypically lower by as much as 17◦C. This is attributed to the large uncertainty inthe MODIS-estimated land surface temperatures in arid and semi-arid regions. Thefindings of this work highlight the need for ground-based observational networksin remote regions such as the Atacama Desert where satellite-derived and modelproducts may not be very accurate.
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Rymd- och flygteknik0 (SwePub)203022 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Aerospace Engineering0 (SwePub)203022 hsv//eng
653		a Atmospheric science
653		a Atmosfärsvetenskap
700	1	a Zorzano Mier, María-Pazu Luleå tekniska universitet,Rymdteknik,Centro de Astrobiología (INTA-CSIC), Madrid, Spain4 aut0 (Swepub:ltu)marzor
700	1	a Azu-Bustos, Armandou Centro de Astrobiología (INTA-CSIC), Madrid, Spain. Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago, Chile4 aut
700	1	a González-Silva, Carlosu Facultad de Ciencias, Universidad de Tarapacá, Iquique, Chile4 aut
700	1	a Martin-Torres, Javieru Luleå tekniska universitet,Rymdteknik,Instituto Andaluz de Ciencias de la Tierra (UGR-CSIC), Granada, Spain4 aut0 (Swepub:ltu)javmar
710	2	a Luleå tekniska universitetb Rymdteknik4 org
773	0	t Quarterly Journal of the Royal Meteorological Societyd : John Wiley & Sonsg 145:722, s. 2202-2220q 145:722<2202-2220x 0035-9009x 1477-870X
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74607
856	4 8	u https://doi.org/10.1002/qj.3553

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