Determining the infrared radiative effects of Saharan dust: a radiative transfer modelling study based on vertically resolved measurements at Lampedusa

Meloni, Daniela; di Sarra, Alcide; Brogniez, Gérard; Denjean, Cyrielle; De Silvestri, Lorenzo; Di Iorio, Tatiana; Formenti, Paola; Gómez-Amo, José L.; Gröbner, Julian; Kouremeti, Natalia; Liuzzi, Giuliano; Mallet, Marc; Pace, Giandomenico; Sferlazzo, Damiano M.

doi:https://doi.org/10.5194/acp-18-4377-2018

Articles | Volume 18, issue 6

https://doi.org/10.5194/acp-18-4377-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

CHemistry and AeRosols Mediterranean EXperiments (ChArMEx)...

https://doi.org/10.5194/acp-18-4377-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 6

Research article

|

29 Mar 2018

Research article |

| 29 Mar 2018

Determining the infrared radiative effects of Saharan dust: a radiative transfer modelling study based on vertically resolved measurements at Lampedusa

Daniela Meloni, Alcide di Sarra, Gérard Brogniez, Cyrielle Denjean, Lorenzo De Silvestri, Tatiana Di Iorio, Paola Formenti, José L. Gómez-Amo, Julian Gröbner, Natalia Kouremeti, Giuliano Liuzzi, Marc Mallet, Giandomenico Pace, and Damiano M. Sferlazzo

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Final revised paper (published on 29 Mar 2018)
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Preprint (discussion started on 21 Aug 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Review of "Determining the infrared radiative effects of Saharan dust: a radiative transfer modelling study based on vertically resolved measurements at Lampedusa"', Anonymous Referee #1, 21 Sep 2017
- AC1: 'Authors' reply to Anonymous Referee #1', Daniela Meloni, 06 Dec 2017
RC2: 'Review of Determining the infrared radiative effects of Saharan dust: a radiative transfer modelling study based on vertically resolved measurements at Lampedusa” by D. Meloni et al.', Anonymous Referee #2, 28 Oct 2017
- AC2: 'Authors' reply to Anonymous Referee #2', Daniela Meloni, 06 Dec 2017

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Daniela Meloni on behalf of the Authors (07 Dec 2017) Author's response Manuscript

ED: Referee Nomination & Report Request started (08 Dec 2017) by Oleg Dubovik

RR by Anonymous Referee #1 (16 Jan 2018)

Suggestions for revision or reasons for rejection

The paper is now better organized and much more clear. They are still some minor comments I have listed below before the manuscript should be accepted for final publication.

- P10l18-19: “The AOD at 8.6 μm is calculated from the MFRSR AOD at 500 nm and the ratio between the extinction coefficient at 8.6 μm and 500 nm obtained from the Mie calculations “ : how is obtained the extinction coefficient at 500 nm since the refractive indices of DB2017 are given only in the 2-16 μm interval?
- P1425: “The agreement is good for both downward and upward LW irradiances with the AERONET SD, and is best with COL1 and COL2 (RMSD of both components 4.1 W m-2). “: I don’t understand why COL3 is not the best? The RMSD of both components is lower than 4 W m-2
- P14 21-25: for my opinion, this paragraph should be placed either in the previous paragraph where irradiance results are analysed or in the section 4.4 where the configurations used for the radiative forcing estimation are defined.
- P20l12: “the scope of simulating the IASI measurements in this work is to show that TOA BTs are sensitive to the dust occurrence and to its AOPs”: since results are important but not new, see for example 2 references given below : Capelle et al., 2014 and Vandenbussche et al., 2013.
- Fig. 4: The AERONET size distribution for 22 June appears to present 3 modes and not 2 and therefore doesn’t correspond to values given in Table S1
- Table S1 : Where come from the size distribution parameters for AERONET since they didn’t apparently come from the AERONET website (where only two modes are retrieved).

Capelle, V., Chédin, A., Siméon, M., Tsamalis, C., Pierangelo, C., Pondrom, M., Crevoisier, C., Crepeau, L. and Scott, N. A.: Evaluation of IASI-derived dust aerosol characteristics over the tropical belt, Atmos. Chem. Phys., 14(17), 9343–9362, doi:10.5194/acp-14-9343-2014, 2014.
Vandenbussche, S., Kochenova, S., Vandaele, A. C., Kumps, N. and De Mazière, M.: Retrieval of desert dust aerosol vertical profiles from IASI measurements in the TIR atmospheric window, Atmos. Meas. Tech, 6, 2577–2591, doi:10.5194/amt-6-2577-2013, 2013.

Referee Report: PDF

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RR by Anonymous Referee #2 (28 Jan 2018)

ED: Publish subject to minor revisions (review by editor) (28 Jan 2018) by Oleg Dubovik

AR by Daniela Meloni on behalf of the Authors (06 Feb 2018) Author's response Manuscript

ED: Publish subject to technical corrections (19 Feb 2018) by Oleg Dubovik

AR by Daniela Meloni on behalf of the Authors (23 Feb 2018) Author's response Manuscript

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Short summary

This study examines how different aerosol optical properties determine the dust longwave radiative effects at the surface, in the atmosphere and at the top of the atmosphere, based on the combination of remote sensing and in situ observations from the ground, from airborne sensors, and from space, by means of radiative transfer modelling. The closure experiment is based on longwave irradiances and spectral brightness temperatures measured during the 2013 ChArMEx–ADRIMED campaign at Lampedusa.