Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

Abstract

The proper forecasting of the occurrence of radiation fog is still one of the challenging topics in boundary-layer meteorology, despite its high societal importance like for aviation and road traffic. In fact radiation fog depends on many processes that all critically interact on relatively short time scales. Goal of this study is to evaluate the performance of two state-of-the-art meso-scale atmospheric models in forecasting the onset and development of radiation fog episodes in the Netherlands. This study is a follow-up of the study by Van de Velde et al. (2010). However, in contrast to Van der Velde et al. (2010) our study focuses on fogs that occur in relatively warm atmospheric conditions. The meso-scale models involved are the widely used Weather Research Forecasting (WRF-version 3.3) model and HARMONIE. The spatial extent of the fog forecasted by the models is evaluated using measurements taken at SYNOP stations throughout the Netherlands. To study the vertical distribution of the fog-related quantities, detailed measurements taken at the Cabauw measurement facility are used. It appears that both the WRF model and the HARMONIE model have severe problems in forecasting both the onset and the duration of the fog layer at different locations. A detailed analysis using the WRF model reveals that the results depend heavily on model physics, most notably the radiation scheme, the parameterization of turbulent transfer within the Atmospheric Boundary Layer and the land-atmosphere exchange scheme. The results also appear to be sensitive to the details of the numerical setup of the experiment such as the extension of the domain and the horizontal and vertical resolution.
Original languageEnglish
Title of host publication20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA)
Place of PublicationBoston
PublisherAmerican Meteorological Society
Pages12A.6
Publication statusPublished - 2012
Event20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction - Boston, United States
Duration: 9 Jul 201213 Jul 2012

Conference

Conference20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction
CountryUnited States
CityBoston
Period9/07/1213/07/12

Fingerprint

convective boundary layer
wind shear
fog
boundary layer
effect
meteorology
vertical distribution
parameterization
physics
timescale
weather
radiation
atmosphere

Cite this

Ronda, R. J., Steeneveld, G. J., & Holtslag, A. A. M. (2012). Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer. In 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA) (pp. 12A.6). Boston: American Meteorological Society.
Ronda, R.J. ; Steeneveld, G.J. ; Holtslag, A.A.M. / Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer. 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA). Boston : American Meteorological Society, 2012. pp. 12A.6
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abstract = "The proper forecasting of the occurrence of radiation fog is still one of the challenging topics in boundary-layer meteorology, despite its high societal importance like for aviation and road traffic. In fact radiation fog depends on many processes that all critically interact on relatively short time scales. Goal of this study is to evaluate the performance of two state-of-the-art meso-scale atmospheric models in forecasting the onset and development of radiation fog episodes in the Netherlands. This study is a follow-up of the study by Van de Velde et al. (2010). However, in contrast to Van der Velde et al. (2010) our study focuses on fogs that occur in relatively warm atmospheric conditions. The meso-scale models involved are the widely used Weather Research Forecasting (WRF-version 3.3) model and HARMONIE. The spatial extent of the fog forecasted by the models is evaluated using measurements taken at SYNOP stations throughout the Netherlands. To study the vertical distribution of the fog-related quantities, detailed measurements taken at the Cabauw measurement facility are used. It appears that both the WRF model and the HARMONIE model have severe problems in forecasting both the onset and the duration of the fog layer at different locations. A detailed analysis using the WRF model reveals that the results depend heavily on model physics, most notably the radiation scheme, the parameterization of turbulent transfer within the Atmospheric Boundary Layer and the land-atmosphere exchange scheme. The results also appear to be sensitive to the details of the numerical setup of the experiment such as the extension of the domain and the horizontal and vertical resolution.",
author = "R.J. Ronda and G.J. Steeneveld and A.A.M. Holtslag",
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Ronda, RJ, Steeneveld, GJ & Holtslag, AAM 2012, Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer. in 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA). American Meteorological Society, Boston, pp. 12A.6, 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, Boston, United States, 9/07/12.

Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer. / Ronda, R.J.; Steeneveld, G.J.; Holtslag, A.A.M.

20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA). Boston : American Meteorological Society, 2012. p. 12A.6.

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

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T1 - Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer

AU - Ronda, R.J.

AU - Steeneveld, G.J.

AU - Holtslag, A.A.M.

N1 - recorded presentation: https://ams.confex.com/ams/20BLT18AirSea/flvgateway.cgi/id/21903?recordingid=21903

PY - 2012

Y1 - 2012

N2 - The proper forecasting of the occurrence of radiation fog is still one of the challenging topics in boundary-layer meteorology, despite its high societal importance like for aviation and road traffic. In fact radiation fog depends on many processes that all critically interact on relatively short time scales. Goal of this study is to evaluate the performance of two state-of-the-art meso-scale atmospheric models in forecasting the onset and development of radiation fog episodes in the Netherlands. This study is a follow-up of the study by Van de Velde et al. (2010). However, in contrast to Van der Velde et al. (2010) our study focuses on fogs that occur in relatively warm atmospheric conditions. The meso-scale models involved are the widely used Weather Research Forecasting (WRF-version 3.3) model and HARMONIE. The spatial extent of the fog forecasted by the models is evaluated using measurements taken at SYNOP stations throughout the Netherlands. To study the vertical distribution of the fog-related quantities, detailed measurements taken at the Cabauw measurement facility are used. It appears that both the WRF model and the HARMONIE model have severe problems in forecasting both the onset and the duration of the fog layer at different locations. A detailed analysis using the WRF model reveals that the results depend heavily on model physics, most notably the radiation scheme, the parameterization of turbulent transfer within the Atmospheric Boundary Layer and the land-atmosphere exchange scheme. The results also appear to be sensitive to the details of the numerical setup of the experiment such as the extension of the domain and the horizontal and vertical resolution.

AB - The proper forecasting of the occurrence of radiation fog is still one of the challenging topics in boundary-layer meteorology, despite its high societal importance like for aviation and road traffic. In fact radiation fog depends on many processes that all critically interact on relatively short time scales. Goal of this study is to evaluate the performance of two state-of-the-art meso-scale atmospheric models in forecasting the onset and development of radiation fog episodes in the Netherlands. This study is a follow-up of the study by Van de Velde et al. (2010). However, in contrast to Van der Velde et al. (2010) our study focuses on fogs that occur in relatively warm atmospheric conditions. The meso-scale models involved are the widely used Weather Research Forecasting (WRF-version 3.3) model and HARMONIE. The spatial extent of the fog forecasted by the models is evaluated using measurements taken at SYNOP stations throughout the Netherlands. To study the vertical distribution of the fog-related quantities, detailed measurements taken at the Cabauw measurement facility are used. It appears that both the WRF model and the HARMONIE model have severe problems in forecasting both the onset and the duration of the fog layer at different locations. A detailed analysis using the WRF model reveals that the results depend heavily on model physics, most notably the radiation scheme, the parameterization of turbulent transfer within the Atmospheric Boundary Layer and the land-atmosphere exchange scheme. The results also appear to be sensitive to the details of the numerical setup of the experiment such as the extension of the domain and the horizontal and vertical resolution.

M3 - Conference paper

SP - 12A.6

BT - 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA)

PB - American Meteorological Society

CY - Boston

ER -

Ronda RJ, Steeneveld GJ, Holtslag AAM. Understanding and representing the effect of wind shear on the turbulent transfer in the convective boundary layer. In 20th Symposium on Boundary Layers and Turbulence/18th Conference on Air-Sea Interaction, American Meteorological Society (9-13 July 2012, Boston, MA). Boston: American Meteorological Society. 2012. p. 12A.6