A novel methodology for large-scale daily assessment of the direct radiative forcing of smoke aerosols

Sena, E. T.; Artaxo, P.

doi:https://doi.org/10.5194/acp-15-5471-2015

Articles | Volume 15, issue 10

https://doi.org/10.5194/acp-15-5471-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-15-5471-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 10

Research article

|

20 May 2015

Research article |

| 20 May 2015

A novel methodology for large-scale daily assessment of the direct radiative forcing of smoke aerosols

E. T. Sena and P. Artaxo

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Final revised paper (published on 20 May 2015)
Preprint (discussion started on 15 Dec 2014)

Interactive discussion

Status: closed

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

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RC C11033: 'A novel methodology using MODIS and CERES for assessing the daily radiative forcing of smoke aerosols in large scale over the Amazonia', Anonymous Referee #1, 09 Jan 2015
- AC C12742: 'Answers to referee #1', Elisa Sena, 24 Mar 2015
RC C11118: 'Review 2', Anonymous Referee #2, 12 Jan 2015
- AC C12743: 'Answers to referee #2', Elisa Sena, 24 Mar 2015

Peer-review completion

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

AR by Elisa Sena on behalf of the Authors (09 Apr 2015) Author's response Manuscript

ED: Reconsider after minor revisions (Editor review) (14 Apr 2015) by Radovan Krejci

Dear authors,

one of the reviewers has following comments. Please have a look at them and address them in next round of Author's response and revised version of manuscript.

Thank you
Radek

The authors significantly improved their manuscript according to reviewer's comments, however, part 3.2 related to the Figure 3 needs more work in my opinion. As suggested, the authors show DARF results for nine years but they only speak about three years (2005-2007) in paragraph two (as it was before when they were showing only three years of data). In paragraph 3, the authors write a very strong statement "Changes in rainfall patterns play a major role to the interannual variability of the DARF" but they do not even show a rainfall time series or plot. Even though I agree that rainfalls and DARF are likely related, this statement needs some support. Then, in the conclusion, the authors indicate that socio-economical changes in the Amazon Basin also impact the DARF. Why is this not mentioned in part 3.2 ? Paragraph 4, the authors indicate that cloud cover varies largely from one day to another (as also shown in the answer to referee, cloud cover can change by 20% between 2 days impacting satellite retrievals), and influences the DARF but they do not mention it in the conclusion. In my opinion, this is the main parameter together with the satellite orbit track location impacting the daily mean DARF.

Minor comments:
- Use either analyse or analyze but not both. Since ACP is a European journal, I guess you should use "analyse".
- P1, L18: remove "degree"
- P5, L20: ...polluted (Fpol) conditions.
- P8, L29: "study area"
- P8, L29: remove "Examples of the". Time series of...
- P9, L27: "does not"
- P9, L29: "source location"
- P16, L15: "was varied" does not seem correct. What about "was changed" ?
- P30, Fig 3: Change the caption accordingly to the plots

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AR by Elisa Sena on behalf of the Authors (22 Apr 2015) Author's response Manuscript

ED: Publish as is (25 Apr 2015) by Radovan Krejci

AR by Elisa Sena on behalf of the Authors (27 Apr 2015) Manuscript

Short summary

A new methodology was developed for retrieving the daily direct radiative forcing of smoke aerosols (24h-DARF) using satellite remote sensing. This method was used to assess the DARF at high temporal resolution and over a large area in Amazonia. We showed that our methodology considerably reduces statistical sources of uncertainties in the estimate of the DARF. DARF assessments using the new methodology agree well with ground-based measurements and radiative transfer models.