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Observations and Wrf Simulations of Fog Events at the Spanish Northern Plateau : Volume 8, Issue 1 (28/02/2012)

By Román-cascón, C.

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Book Id: WPLBN0003990716
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Observations and Wrf Simulations of Fog Events at the Spanish Northern Plateau : Volume 8, Issue 1 (28/02/2012)  
Author: Román-cascón, C.
Volume: Vol. 8, Issue 1
Language: English
Subject: Science, Advances, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Yagüe, C., Maqueda, G., Salamanca, F., Román-Cascón, C., Viana, S., & Sastre, M. (2012). Observations and Wrf Simulations of Fog Events at the Spanish Northern Plateau : Volume 8, Issue 1 (28/02/2012). Retrieved from http://community.worldlibrary.net/


Description
Description: Dpto. Geofísica y Meteorología, Universidad Complutense de Madrid, Spain. The prediction of fogs is one of the processes not well reproduced by the Numerical Weather Prediction (NWP) models. In particular, the role of turbulence in the formation or dissipation of fogs is one of the physical processed not well understood, and therefore, not well parameterized by the NWP models. Observational analysis of three different periods with fogs at the Spanish Northern Plateau has been carried out. These periods have also been simulated with the Weather Research and Forecasting (WRF) numerical model and their results have been compared to observations. The study includes a comparison of the skill of different planetary boundary layer (PBL) parameterizations, surface layer schemes and a test of the gravitational settling of clouds/fogs droplets option. A statistical analysis of this comparison has been evaluated in order to study differences between the periods and between the various parameterizations used. The model results for each PBL parameterization were different, depending on the studied period, due to differences in the features of each fog. This fact made it difficult to obtain generalized conclusions, but allowed us to determine which parameterization performed better for each case. In general, judging from the models results of liquid water content (LWC), none of the PBL schemes were able to correctly simulate the fogs, being Mellor-Yamada Nakanishi and Niino (MYNN) 2.5 level PBL scheme the best one in most of the cases. This conclusion is also supported by the root mean square error (RMSE) calculated for different meteorological variables.

Summary
Observations and WRF simulations of fog events at the Spanish Northern Plateau

Excerpt
Cuxart, J. and Jiménez, M. A.: Deep radiation fog in a wide closed valley: Study by numerical physics: its design and verification, Pure Appl. Geophys., doi:10.1007/s00024-011-0365-4, in press, 2012.; Janjic, Z. A.: The step-mountain coordinate: physics package, Mon. Weather Rev. 118, 1429–1443, 1990.; Cuxart, J., Yagüe, C., Morales, G., Terradellas, E., Orbe, J., Calvo, J., Fernandez, A. Soler, M. R., Infante, C., Buenestado, P., Espinalt, A., Joergensen, H. E., Rees, J. M., Vilá, J., Redondo, J. M., Cantalapiedra, I. R., and Conangla, L.: Stable Atmospheric Boundary-Layer Experiment in Spain (SABLES 98): A report, Bound.-Lay. Meteorol., 96, 337–370, 2000.; Nakanishi, M. and Niino, H.: An improved Mellor-Yamada level-3 model with condensation physics: its design and verification, Bound.-Lay. Meteorol., 112, 1–31, 2004.; NCEP: Mesoscale & Microscale Meteorology Division, Weather Research & Forecasting ARW Version 3 Modeling System User's Guide, 2011.; Roach, W. T., Brown, R., Caughey, S. J., Garland, J. A., and Readings, C. J.: The physics of radiation fog I – a field study, Q. J. Roy. Meteor. Soc., 102, 313–333, 1976.; Shin, H. H. and Hong, S.-Y.: Intercomparison of Planetary Boundary Layer Parameterizations in the WRF Model for a Single Day from CASES-99, Bound.-Lay. Meteorol., 281, 139–261, 2011.; Skamarock, W. C., Klemp, J. B., Dudhia, J., Gill, D. O., Barker, D. M., Duda, M. G., Huang, X. Y., Wang, W., and Powers, J. G.: A description of the advanced research WRF version 3, NCAR Technical note, NCAR/TN-475+STR, 113 pp., 2008.; Sukorianski, S., Galperin, B., and Perov, V.: Application of a new spectral theory of stable stratified turbulence to the atmospheric boundary layer over sea ice, Bound.-Lay. Meteorol., 117, 231–257, 2005.; Van Der Velde, I. R., Steeneveld, G. J., Wichers Schreur, B. G. J., and Holtslag, A. A. M.: Modeling and Forecasting the Onset and Duration of Severe Radiation Fog under Frost Conditions, Mon. Weather Rev., 138, 4237–4253, 2010.; Welch, R. M. and Welicki, B. A.: The stratocumulus nature of fog, J. Appl. Meteorol., 25, 101–111, 1986.; Yagüe, C., Sastre, M., Maqueda, G., Viana, S., Ramos, D., Vindel, J. M., and Morales, G.: CIBA2008, an experimental campaign on the atmospheric boundary layer: preliminary nocturnal results, Física de la Tierra, 21, 13–26, available at: http://revistas.ucm.es/fis/02144557/articulos/FITE0909110013A.PDF, 2009.; Zhou, B. and Ferrier, B. S.: Asymptotic Analysis of Equilibrium in Radiation fog, J. Appl. Meteor. Clim., 47, 1704–1722, 2008.

 

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