Influence of valley winds on transport and dispersion of airborne pollutants in the Freiburg‐Schauinsland area

Kalthoff, Norbert; Horlacher, V.; Corsmeier, U.; Volz‐Thomas, A.; Kolahgar, Bita; Geiss, H.; Möllmann-Coers, M.; Knaps, A.

doi:10.1029/1999jd900999

Cited by 66 publications

(38 citation statements)

References 28 publications

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“…Kossmann et al (1999) suggested that the cells are caused by thermally induced upslope winds over the steep sidewalls of the valley. Fiedler et al (2000), Kossmann and Fiedler (2000), Kalthoff et al (2000) and Kalthoff et al (2009) confirmed that thermally induced slope and valley winds are common, and often result in convergence zones over the mountain crests. Results of the Vertical Exchange and Orography (VERTIKATOR) project discussed by Barthlott et al (2006), for example, showed that these convergence zones are responsible for triggering deep convection.…”

Section: Introductionmentioning

confidence: 68%

Initiation of convection over the Black Forest mountains during COPS IOP15a

Bennett

Blyth

Burton

et al. 2011

Quart J Royal Meteoro Soc

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Section: Introductionmentioning

confidence: 68%

Initiation of convection over the Black Forest mountains during COPS IOP15a

Bennett

Blyth

Burton

et al. 2011

Quart J Royal Meteoro Soc

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“…1b), which markedly impact on the precipitation distribution in the area (Khodayar et al 2013). In particular, the alternation of hills and valleys generates local winds (Koßmann Topography [m] and Fiedler 2000; Kalthoff et al 2000), which result in convergence zones over the mountain crests and trigger convection (Meißner et al 2007;Barthlott et al 2006). Several campaigns, like VERTIKATOR in 2002 (e.g.…”

Section: Investigation Areamentioning

confidence: 99%

Benefit of convection permitting climate model simulations in the representation of convective precipitation

2014

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and 2.8 km resolutions in the representation of precipitation at sub-daily timescales, and the atmospheric conditions leading to convection. Our results show that the highest resolution of RCM simulations significantly improves the representation of both hourly intensity distribution and diurnal cycle of precipitation. In addition, at convection permitting scale the atmospheric fields related to convective precipitation show a better agreement with each other. The results imply that higher spatial resolution partially improves the representation of the precipitation field, which must be the way forward for regional climate modelling.

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“…South-western Germany and eastern France, meaning the upper Rhine valley, enclosed by the Black Forest and Vosges mountains, is well known as a favourable area for the triggering of convection (Bertram et al, 2004;Barthlott et al, 2006;Meißner et al, 2007;Groenemeijer et al, 2009). Additionally, considerable information about the spatial distribution of the energy balance (Kalthoff et al, 1999) as well as about the spatial and temporal variability of the CBL height is available (Kalthoff et al, , 2000Koßmann et al, 1998). Therefore, this region was chosen in summer 2007 to perform the field campaign 'Convective and Orographically-induced Precipitation Study' (COPS: Wulfmeyer et al, 2008) within the framework of the priority programme 'Quantitative Precipitation Forecast' of the German Research Foundation.…”

Section: Introductionmentioning

confidence: 99%

The dependence of convection‐related parameters on surface and boundary‐layer conditions over complex terrain

Kalthoff

Köhler

Barthlott

et al. 2010

Quart J Royal Meteoro Soc

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The field campaign 'Convective and Orographically-induced Precipitation Study' (COPS) was performed in south-western Germany and eastern France in summer 2007. Within the COPS context this study focused on the process chain of soil moisture, surface fluxes, conditions of the convective boundary layer (CBL), and convection-related parameters.The results were different for valley and mountain sites. Only in the Rhine valley did the ratios of sensible and latent heat to the net radiation at the surface, H 0 /Q 0 and E 0 /Q 0 respectively, reveal a weak dependence on soil moisture. H 0 /Q 0 was lower and E 0 /Q 0 was higher at higher soil moisture. The correlation of the diurnal increase of the equivalent potential temperature, e , with the energy supplied by H 0 and E 0 was found to be lower for higher surface inhomogeneity. Furthermore, only a weak dependence of the CBL depth on the sensible surface heat flux was found for valley sites and was non-existent for the mountain crest.The convective indices in the whole COPS domain were found to depend on e in the CBL. The absolute values of conditional and potential instability are not necessarily the decisive parameters for convection to occur, because highest instability was observed in the Rhine valley while convection was preferably initiated over the mountains. Convective inhibition (CIN) was positively correlated with the capping strength and negatively with the CBL height: the higher the CBL, the lower the upper threshold of CIN. The frequency of low CIN was higher in the Black Forest mountains than in the Rhine valley, which facilitates convection initiation over the mountain sites.

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Influence of valley winds on transport and dispersion of airborne pollutants in the Freiburg‐Schauinsland area

Cited by 66 publications

References 28 publications

Initiation of convection over the Black Forest mountains during COPS IOP15a

Initiation of convection over the Black Forest mountains during COPS IOP15a

Benefit of convection permitting climate model simulations in the representation of convective precipitation

The dependence of convection‐related parameters on surface and boundary‐layer conditions over complex terrain

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