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

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Cited articles

Adams, D. K., Fernandes, R. M. S., Kursinski, E. R., Maia, J. M., Sapucci, L. F., Machado, L. A. T., Vitorello, I., Monico, J. F. G., Holub, K. L., Gutman, S. I., Filizola, N., and Bennett, R. A.: A dense GNSS meteorological network for observing deep convection in the Amazon, Atmos. Sci. Lett., 12, 207–212,, 2011. a
Adams, D. K., Gutman, S. I., Holub, K. L., and Pereira, D. S.: GNSS observations of deep convective time scales in the Amazon, Geophys. Res. Lett., 40, 2818–2823,, 2013. a
Anderson, G. P., Clough, S. A., Kneizys, F. X., Chetwynd, J. H., and Shettle, E. P.: AFGL atmospheric constituent profiles (0–120 km), Tech. Rep. AFGL-TR-86-0110, Tech. rep., Air Force Geophysics Laboratory, Hanscom Air Force Base, Bedford, Mass, (last access: 30 August 2022), (last access: 30 August 2022), 1986. a, b, c
Benevides, P., Catalao, J., and Miranda, P. M. A.: On the inclusion of GPS precipitable water vapour in the nowcasting of rainfall, Nat. Hazards Earth Syst. Sci., 15, 2605–2616,, 2015. a
Castro-Almazán, J. A., Pérez-Jordán, G., and Muñoz-Tuñón, C.: A semiempirical error estimation technique for PWV derived from atmospheric radiosonde data, Atmos. Meas. Tech., 9, 4759–4781,, 2016. a, b, c
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.