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

Earth, Planets and Space

Table 1 Statistics of soil CO₂ flux and environmental parameters

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