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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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AMT | Articles | Volume 13, issue 9
Atmos. Meas. Tech., 13, 4995–5012, 2020
https://doi.org/10.5194/amt-13-4995-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 13, 4995–5012, 2020
https://doi.org/10.5194/amt-13-4995-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 25 Sep 2020

Research article | 25 Sep 2020

Calibration of global MODIS cloud amount using CALIOP cloud profiles

Andrzej Z. Kotarba

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Lorena Grabowski on behalf of the Authors (16 Jul 2020)  Author's response
ED: Publish subject to minor revisions (review by editor) (17 Jul 2020) by Andrew Sayer
AR by Andrzej Kotarba on behalf of the Authors (04 Aug 2020)  Author's response    Manuscript
ED: Publish subject to technical corrections (07 Aug 2020) by Andrew Sayer
Publications Copernicus
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Short summary
This paper evaluates the operational approach for producing global (Level 3) cloud amount based on MODIS cloud masks (Level 2). Using CALIPSO we calculate the actual cloud fractions for each cloud mask category, which are 21.5 %, 27.7 %, 66.6 %, and 94.7 % instead of assumed 0 %, 0 %, 100 %, and 100 %. Consequently we find the operational procedure unreliable, especially on a regional/local scale. A method of how to correct and calibrate MODIS global data using CALIPSO detections is suggested.
This paper evaluates the operational approach for producing global (Level 3) cloud amount based...
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