Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 16, issue 5
Articles | Volume 16, issue 5
https://doi.org/10.5194/amt-16-1263-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-16-1263-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 5
Research article
 | 
10 Mar 2023
Research article |  | 10 Mar 2023

Precipitable water vapor retrievals using a ground-based infrared sky camera in subtropical South America

Elion Daniel Hack, Theotonio Pauliquevis, Henrique Melo Jorge Barbosa, Marcia Akemi Yamasoe, Dimitri Klebe, and Alexandre Lima Correia

Data sets

Upper air atmospheric soundings University of Wyoming https://weather.uwyo.edu/cgi-bin/sounding?region=samer&TYPE=TEXT\%3ALIST&YEAR=YYYY&MONTH=MM&FROM=DD12&TO=DD12&STNM=83779

Radiosonde and sun photometer data set E. D. Hack https://doi.org/10.5281/zenodo.7683313

AERONET Water Vapor NASA https://aeronet.gsfc.nasa.gov/cgi-bin/data_display_aod_v3?site=Sao_Paulo&nachal=0&year=YYYY&aero_water=1&level=3&if_day=0&if_err=0&place_code=10&year_or_month=1

Model code and software

ASIVA processing code suite E. D. Hack https://doi.org/10.5281/zenodo.7683317

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Short summary
Water vapor is a key factor when seeking to understand fast-changing processes when clouds and storms form and develop. We show here how images from a calibrated infrared camera can be used to derive how much water vapor there is in the atmosphere at a given time. Comparing our results to an established technique, for a case of stable atmospheric conditions, we found an agreement within 2.8 %. Water vapor sky maps can be retrieved every few minutes, day or night, under partly cloudy skies.
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