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Volume 19, issue 7
Atmos. Chem. Phys., 19, 4615–4635, 2019
https://doi.org/10.5194/acp-19-4615-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 19, 4615–4635, 2019
https://doi.org/10.5194/acp-19-4615-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 08 Apr 2019

Research article | 08 Apr 2019

From weak to intense downslope winds: origin, interaction with boundary-layer turbulence and impact on CO2 variability

Jon Ander Arrillaga et al.

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AEMET: Summary of Summer 2017, Spanish Meteorological Agency, available at: http://www.aemet.es/en/noticias/2017/09/Verano_2017 (last access: 13 August 2018), 2017.
Arrillaga, J. A., Vilà-Guerau de Arellano, J., Bosveld, F., Baltink, H. K., Yagüe, C., Sastre, M., and Román-Cascón, C.: Impacts of afternoon and evening sea-breeze fronts on local turbulence, and on CO2 and radon-222 transport, Q. J. Roy. Meteor. Soc., 144, 990–1011, https://doi.org/10.1002/qj.3252, 2018.
Atkinson, B.: Meso-Scale Atmospheric Circulations, Academic Press, London, 1981.
Banta, R. M. and Gannon, P. T.: Influence of soil moisture on simulations of katabatic flow, Theor. Appl. Climatol., 52, 85–94, https://doi.org/10.1007/BF00865509, 1995.
Barry, R. G.: Mountain Weather and Climate, Cambridge University Press, Cambridge, UK, Meteorol. Appl., 17, 506 pp., https://doi.org/10.1002/met.222, 2008.
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Short summary
Thermally driven downslope winds develop in mountainous areas under a weak large-scale forcing and clear skies. In this work, we find that their onset time and intensity are closely connected with both the large-scale wind and soil moisture. We also show how the distinct downslope intensities shape the turbulent and thermal features of the nocturnal atmosphere. The analysis concludes that the downslope–turbulence interaction and the horizontal transport explain the important CO2 variability.
Thermally driven downslope winds develop in mountainous areas under a weak large-scale forcing...
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