Preprints
https://doi.org/10.5194/acp-2021-706
https://doi.org/10.5194/acp-2021-706

  09 Sep 2021

09 Sep 2021

Review status: this preprint is currently under review for the journal ACP.

Mesoscale spatio-temporal variability of airborne lidar-derived aerosol properties in the Barbados region during EUREC4A

Patrick Chazette1, Alexandre Baron1,a, and Cyrille Flamant2 Patrick Chazette et al.
  • 1LSCE/IPSL, CNRS-CEA-UVSQ, University Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette, France
  • 2LATMOS/IPSL, CNRS-SU-UVSQ, Sorbonne Université, Campus Pierre et Marie Curie, 75252 Paris, France
  • anow at: Laboratoire de l’Atmosphère et des Cyclones, UMR8105, Université de la Réunion - CNRS - Météo-France, Saint-Denis de La Réunion, France

Abstract. From 23 January to 13 February 2020, twenty ATR-42 scientific flights were conducted in the framework of the EUREC4A field campaign over the tropical Atlantic, off the coast of Barbados (−58°30' W 13°30' N). By means of a side-pointing lidar, these flights allowed to retrieve the optical properties of the aerosols found in the sub-cloud layer and below the trade winds inversion. Two distinct periods with significant aerosol contents were identified in relationship with the so-called trade wind and tropical regimes, respectively. A very strong spatial heterogeneity of the aerosol field has been highlighted at the airborne measurements scale of a few tens of kilometres. This heterogeneity, difficult to capture using spaceborne instruments, can be related to the highly variable relative humidity field and the fractional cloud cover encountered during all the flights.

Patrick Chazette et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-706', Anonymous Referee #1, 18 Oct 2021
  • RC2: 'Review Chazette et al. ‚ Mesoscales patio-temporal variability of airborne lidar-derived aerosol properties in the Barbados region during EUREC4A’', Anonymous Referee #2, 08 Nov 2021

Patrick Chazette et al.

Patrick Chazette et al.

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Short summary
Within the framework of the international EUREC4A project, horizontal lidar measurements were carried out over Barbados from the French research aircraft ATR-42. These measurements highlighted the strong heterogeneity of the aerosol field and therefore of the associated optical properties. This heterogeneity varies according to meteorological conditions and could significantly modulate the climatic impact of aerosols trapped over the tropical Atlantic.
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