Articles | Volume 22, issue 2
Atmos. Chem. Phys., 22, 739–763, 2022
https://doi.org/10.5194/acp-22-739-2022
Atmos. Chem. Phys., 22, 739–763, 2022
https://doi.org/10.5194/acp-22-739-2022
Research article
18 Jan 2022
Research article | 18 Jan 2022

Long-term characterisation of the vertical structure of the Saharan Air Layer over the Canary Islands using lidar and radiosonde profiles: implications for radiative and cloud processes over the subtropical Atlantic Ocean

África Barreto et al.

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Cited articles

Alastuey, A., Querol, X., Castillo, S., Escudero, M., Avila, A., Cuevas, E., Torres, C., Romero, P., Expósito, F., García, O., Díaz, J., Van Dingenen, R., and Putaud, J.: Characterisation of TSP and PM2.5 at Izaña and Sta. Cruz de Tenerife (Canary Islands, Spain) during a Saharan Dust Episode (July 2002), Atmos. Environ., 39, 4715–4728, https://doi.org/10.1016/j.atmosenv.2005.04.018, 2005. a
Alonso-Pérez, S., Cuevas, E., Querol, X., Viana, M., and Guerra, J.: Impact of the Saharan dust outbreaks on the ambient levels of total suspended particles (TSP) in the marine boundary layer (MBL) of the Subtropical Eastern North Atlantic Ocean, Atmos. Environ., 41, 9468–9480, https://doi.org/10.1016/j.atmosenv.2007.08.049, 2007. a
Alonso-Pérez, S., Cuevas, E., Pérez, C., Querol, X., Baldasano, J., Draxler, R., and Bustos, J. D.: Trend changes of African airmass intrusions in the marine boundary layer over the subtropical Eastern North Atlantic region in winter, Tellus B, 63, 255–265, https://doi.org/10.1111/j.1600-0889.2010.00524.x, 2011. a
Alonso-Pérez, S., Cuevas, E., Querol, X., Guerra, J., and Pérez, C.: African dust source regions for observed dust outbreaks over the Subtropical Eastern North Atlantic region, above 25 N, J. Arid Environ., 78, 100–109, https://doi.org/10.1016/j.jaridenv.2011.11.013, 2012. a
Anderson, G., Clough, S., Kneizys, F., Chetwynd, J., and Shettle, E.: AFGL Atmospheric Constituent Profiles (0.120 km), Environmental research papers, p. 46, available at: https://www.osti.gov/biblio/6862535 (last access: 1 March 2021), 1986. a
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Short summary
In this study, we categorise the different patterns of dust transport over the subtropical North Atlantic and for the first time robustly describe the dust vertical distribution in the Saharan Air Layer (SAL) over this region. Our results revealed the important role that both dust and water vapour play in the radiative balance in summer and winter and confirm the role of the SAL in the formation of mid-level clouds as a result of the activation of heterogeneous ice nucleation processes.
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