Sky radiance at a coastline and effects of land and ocean reflectivities

Kreuter, Axel; Blumthaler, Mario; Tiefengraber, Martin; Kift, Richard; Webb, Ann R.

doi:https://doi.org/10.5194/acp-17-14353-2017

Articles | Volume 17, issue 23

https://doi.org/10.5194/acp-17-14353-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-17-14353-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 23

Research article

|

04 Dec 2017

Research article |

| 04 Dec 2017

Sky radiance at a coastline and effects of land and ocean reflectivities

Axel Kreuter, Mario Blumthaler, Martin Tiefengraber, Richard Kift, and Ann R. Webb

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Final revised paper (published on 04 Dec 2017)
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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- Supplement

RC1: 'Interactive comment on “Sky radiance at a coastline and effects of land and ocean reflectivities” by Axel Kreuter et al.', Anonymous Referee #2, 17 Sep 2017
- AC2: 'Reply to Referee #2', Axel Kreuter, 19 Oct 2017
RC2: 'REview of Kreuter et al. Sky radiance at a coastline and effects of land and ocean reflectivities', Anonymous Referee #1, 18 Sep 2017
- AC1: 'Reply to Referee #1', Axel Kreuter, 19 Oct 2017
RC3: 'The Review of the paper “Manuscript ID: ACPD-2017-622 Title: Sky radiance at a coastline and effects of land and ocean reflectivities Authors: Axel Kreiter et al.,', Anonymous Referee #3, 19 Sep 2017
- AC3: 'Reply to Referee #3', Axel Kreuter, 19 Oct 2017

Peer-review completion

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

AR by Anna Wenzel on behalf of the Authors (23 Oct 2017) Author's response

ED: Publish as is (24 Oct 2017) by Stelios Kazadzis

Short summary

We have done measurements of the sky's brightness at the Italian coast and show the influence of the underlying surface: looking towards the land, the sky can be up to 50 % brighter than opposite viewing directions towards the ocean as a result of higher land reflectivity. At low solar elevations, the specular reflection from the ocean, or sun glint, increases the zenith brightness. Understanding these effects requires a 3-D model and is important when retrieving, e.g., aerosol properties.