Publication Date:
2018-03-12
Description:
The experimental dataset of downwelling radiance spectra measured at the ground in clear conditions during 2013 by a Far Infrared Fourier Transform Spectrometer at Dome-C, Antarctica, presented in Rizzi et al. [2016] is used to estimate the effect of solar heating of the radiosonde humidity sensor, called dry bias. The effect is quite evident comparing residuals for the Austral Summer and Winter clear cases and can be modeled by an increase of the water vapour concentration at all levels by about15%. Such an estimate has become possible only after a new version of the simulation code and spectroscopic data has become available, which has substantially improved the modelling of water vapour absorption in the Far Infrared. The negative yearly spectral bias reported in Rizzi et al. [2016] is in fact greatly reduced when compared to the same measurement dataset.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
