Water vapor sounding with the far infrared REFIR-PAD spectroradiometer from a high-altitude ground-based station during the ECOWAR campaign

• Published in: Journal of Geophysical Research
• Main Authors: Bianchini, G., Palchetti, L., Muscari, G., Fiorucci, I., Di Girolamo, P., Di Iorio, T.
• Other Authors: Bianchini, G.; Istituto di Fisica Applicata “Nello Carrara” (IFAC-CNR), Sesto Fiorentino, Italy, Palchetti, L.; Istituto di Fisica Applicata “Nello Carrara” (IFAC-CNR), Sesto Fiorentino, Italy, Muscari, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Fiorucci, I.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Di Girolamo, P.; Dipartimento di Ingegneria e Fisica dell’Ambiente, Universit`a della Basilicata, Potenza, Italy, Di Iorio, T.; Dipartimento di Fisica, Universit`a di Roma “La Sapienza”, Roma, Italy, Istituto di Fisica Applicata “Nello Carrara” (IFAC-CNR), Sesto Fiorentino, Italy, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Dipartimento di Ingegneria e Fisica dell’Ambiente, Universit`a della Basilicata, Potenza, Italy, Dipartimento di Fisica, Universit`a di Roma “La Sapienza”, Roma, Italy
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Geophysical Union 2010
• Subjects: tropospheric water vapor; IR spectroscopy; REFIR-PAD; ECOWAR; 01. Atmosphere::01.01. Atmosphere::01.01.01. Composition and Structure; 01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniques; Alta; Arctic
• Online Access: http://hdl.handle.net/2122/6345; https://doi.org/10.1029/2010JD014530

The REFIR-PAD spectroradiometer was operated from the Testa Grigia Italian-Alps station in March 2007 during the Earth COoling by WAter vapouR emission (ECOWAR) measurement campaign, obtaining downwelling radiance spectra in the 100-1100 cm−1 range, under clear-sky condition and in the presence of cirrus clouds. The analysis of these mea surements has proven that the instrument is capable of determining precipitable water vapor with a total uncertainty of 5–7% by using the far-infrared rotational band of water. The measurement is unaffected by the presence of cirri, whose optical depth can be instead retrieved as an additional parameter. Information on the vertical profiles of water vapor volume mixing ratio and temperature can also be retrieved for three altitude levels. The ability to measure the water vapor column with a simple, uncooled instrument, capable of operating continuously and with a time resolution of about 10 minutes makes REFIR-PAD a very valuable instrument for meteorological and climatological studies for the characterization of the water vapor distribution. In press 1.7. Osservazioni di alta e media atmosfera 1.10. TTC - Telerilevamento JCR Journal restricted