Table 1 Instrumental setup of the automatic weather station installed at the South Col in May 2008

Air temperature

Thermohygrometer LSI Lastem DMA 672^a

Pt100 Class B 1/3 DIN

−30°C to 70°C

±0.1°C (at 0°C)

10

2.5

Relative humidity

Thermohygrometer LSI Lastem DMA 672^a

Capacitive hygrometer

0% to 100%

1.5% (from 5% to 95% at 23°C)

10

2.5

Barometric pressure

Vaisala PTB330^b

BAROCAP© silicon capacitive absolute barometer

50 to 1,100 hPa

±0.75 hPa (from −40°C to +60°C)

1

2.5

Wind speed

LSI Lastem CombiSD DNA022^a

three-cup and vane anemometer with optoelectronic disc

0 to 60 m/s

0.1 m/s + 1

2.5

3

Wind direction

LSI Lastem CombiSD DNA022^a

2,000-Ω wire potentiometer

0° to 360°

1% full scale

0.74

3