The parameters measured by IASI (in either standalone mode or in concert wiht other EPS instruments) are temperature profiles, water vapor profiles, surface characteristics (e.g. temperature, emissivity, etc.), cloud parameters (e.g. top pressure and temperature, effective amount) and column integrated and vertical information of some minor constituents (e.g. O , CO, CH , N O, etc.). The primary objectives of the EPS mission are in the areas of operational meteorology and climate monitoring, but the system will also support research in the areas of meteorology and global change. See the IASI Web site.
In the summer, the volume of the Iceland Sea is composed of about 60% Greenland Sea Deep Water (GSDW), 30% upper and lower Arctic Intermediate Water (AIW), with the remaining 10% distributed among the Polar Intermediate Water (PIW), - surface water masses (i.e. Polar Water (PW), Atlantic Water (AW), and Arctic Surface Water (ASW)). See Swift (1986) and Hopkins (1991).
where P is the pressure, the density and T the temperature. is the gas constant for dry air and equal to 287.053 JK kg or 0.287053 kPaK m kg . This can also be used for calculations with moist air via the virtual temperature concept.