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Table 1 Statistics of soil CO2 flux and environmental parameters

From: Continuous monitoring of soil CO2 flux at Aso volcano, Japan: the influence of environmental parameters on diffuse degassing

Parameter Unit Data no. Mean SD Min. Max.
Soil CO2 flux g m−2 day−1 12,370 2.1 2.6 0.01 46.4
Barometric pressure hPa 16,136 884.7 4.4 862.1 896.3
Air temperature °C 14,899 11.8 8.8 −14.1 30.7
Air relative humidity % 13,471 82.9 18.9 6.0 100.0
Precipitation mm h−1 14,293 0.5 2.3 0.0 75.2
Soil temperature °C 16,136 12.4 7.3 0.4 23.4
Soil humidity % 16,136 16.7 4.9 2.8 32.3
Wind speed m s−1 16,136 2.5 2.0 0.0 14.3
Wind direction °North 16,136 nd nd 0 359
  1. SD Standard deviation, nd not determined