Water vapor isotope experiment was conducted at Rosemount site, Rosemount, USA (44.70N, 93.08W). The site includes two sets: Soybean (G21, Apr 2007 - Oct 2007) and tall tower (Jan 2010- Dec 2013).
Data download: Tall Tower, Soybean Site
Variable definitions
Tall Tower Data (Rosemount, Minnesota KCMP Tall Tower):
Description |
Unit |
Equipment |
Height (m) |
Additional description |
Date time |
− |
− |
− |
UTC |
Water mixing ratio |
ppmv |
Campbell TGA-200 |
180 |
− |
Water vapour isotopic ratio (18O) |
per mil |
Campbell TGA-200 |
180 |
Normalized to V-SMOW; Humidity dependence correlation: Dripper system |
Standard deviation of 18O |
per mil |
Campbell TGA-200 |
180 |
Hourly |
Water vapour isotopic ratio (D) |
per mil |
Campbell TGA-200 |
180 |
Normalized to V-SMOW; Humidity dependence correlation: Dripper system |
Standard deviation of D |
per mil |
Campbell TGA-200 |
180 |
Hourly |
Air temperature |
K |
HMP45C |
3.0 |
− |
Relative humidity |
<=100% |
HMP45C |
3.0 |
− |
Air pressure |
Pa |
HMP45C |
3.0 |
− |
Precipitation |
mm |
TE525MM |
- |
− |
Net radiation |
W/m2 |
CNR-1 |
3.7 |
− |
Wind speed |
m/s |
DA600-62AX |
2.1 |
− |
Wind direction |
°C |
DA600-62AX |
2.1 |
− |
Air temperature |
K |
− |
− |
ERA5 |
Relative humidity |
<=100% |
− |
2 |
ERA5 |
Air pressure |
Pa |
− |
2 |
ERA5 |
Precipitation |
mm |
− |
− |
ERA5 |
Net radiation |
W/m2 |
− |
− |
ERA5 |
Wind speed |
m/s |
− |
− |
ERA5 |
Wind direction |
°C |
− |
10 |
ERA5 |
Soybean site Data (Rosemount, Minnesota Soybean site):
Description |
Unit |
Equipment |
Height (m) |
Additional description |
Date time |
− |
− |
− |
UTC |
Water mixing ratio |
ppmv |
Campbell TGA-200 |
3 |
− |
Water vapour isotopic ratio (18O) |
per mil |
Campbell TGA-200 |
3 |
Normalized to V-SMOW; Humidity dependence correlation: Dripper system |
Standard deviation of 18O |
per mil |
Campbell TGA-200 |
3 |
Hourly |
Water vapour isotopic ratio (D) |
per mil |
Campbell TGA-200 |
3 |
Normalized to V-SMOW; Humidity dependence correlation: Dripper system |
Standard deviation of D |
per mil |
Campbell TGA-200 |
3 |
Hourly |
Air temperature |
K |
HMP45C |
3.0 |
G21 |
Relative humidity |
<=100% |
HMP45C |
3.0 |
G21 |
Air pressure |
Pa |
HMP45C |
3.0 |
G21 |
Precipitation |
mm |
TE525MM |
− |
G21 |
Net radiation |
W/m2 |
CNR-1 |
3.7 |
G21 |
Wind speed |
m/s |
DA600-62AX |
2.1 |
G21 |
Wind direction |
°C |
DA600-62AX |
2.1 |
G21 |
Air temperature |
K |
DA600-62AX |
2.1 |
ERA5 |
Relative humidity |
<=100% |
− |
2 |
ERA5 |
Air pressure |
Pa |
− |
2 |
ERA5 |
Precipitation |
mm |
− |
− |
ERA5 |
Net radiation |
W/m2 |
− |
− |
ERA5 |
Wind speed |
m/s |
− |
− |
ERA5 |
Wind direction |
°C |
− |
10 |
ERA5 |
Reference papers
Griffis, T.J., Lee, X., Baker, J.M., Billmark, K., Schultz, N., Erickson, M., Zhang, X., Fassbinder, J., Xiao, W. and Hu, N., 2011. Oxygen isotope composition of evapotranspiration and its relation to C4 photosynthetic discrimination. Journal of Geophysical Research: Biogeosciences, 116(G1).
Griffis, T.J., Wood, J.D., Baker, J.M., Lee, X., Xiao, K., Chen, Z., Welp, L.R., Schultz, N.M., Gorski, G., Chen, M. and Nieber, J., 2016. Investigating the source, transport, and isotope composition of water vapor in the planetary boundary layer. Atmospheric Chemistry and Physics, 16(8), pp.5139-5157.
Site contact
Name: Timothy Griffis
Email: timgriffis@umn.edu