The air temperature as measured at 2 m above the surface
TYPE OF INDICATOR
There are three types of indicators used in this report:
1.Describes the CONDITION of important elements of a system;
2.Show the extent of the major PRESSURES exerted on a system;
3.Determine RESPONSES to either condition or changes in the condition of a system.
This indicator is one of: CONDITION ... RATIONALE FOR INDICATOR SELECTION
The vast majority of staffed stations that have operated in the Antarctic have had a surface meteorological observing programme consisting of routine (usually 3 or 6 hourly) observations of near-surface air temperature. The thermometers are housed in standard screens that shield the instruments from direct solar radiation. The individual observations over a day are meaned to produce a daily mean temperature, which is then used to compute a monthly mean temperature. The monthly mean temperatures are here taken as the basic quantity to be evaluated. This quantity will allow changes in temperature at different times of the year to be evaluated.
DESIGN AND STRATEGY FOR INDICATOR MONITORING PROGRAM