The Humidity And Temperature PROfiler (HATPRO)
In the framework of the SVAAP project, a microwave profiler, a HATPRO G2 purchased from the Radiometer Physics GmbH (RPG), was installed at Thule in July 2016.
The radiometer measures the brightness temperature in the K and V bands sampling the water vapor absorption lines and the oxygen complex.
A statistical inversion methodology, similar to that described in Löhnert and Crewell , is used to continuously derive the amount of the integrated water vapor, the liquid water path as well as the tropospheric temperature and specific humidity profiles.
A detailed description of the HATPRO design is given by Rose et al. .
A zenith looking infrared pyrometer, an Heitronics KT 19.85 II, operating in the 9.6-11.5 µm band, was installed in proximity of the HATPRO to provide information concerning the presence and the altitude of clouds.
Scientific issues of interest
- How does the presence of liquid water in tropospheric polar clouds affect the energy budget in the atmosphere and at the surface?
- Which is the role played by the winter Artic surface temperature inversion in the infrared radiative balance?
- Which are the interactions between bearing liquid clouds and the surface temperature inversion?