Water vapor isotope experiment was conducted at Niwot Ridge site, Colorado, US (40.03N, 105.55W) from Jan 2011 to Dec 2014.
Data download: NetCDF
Variable definitions
|
Description |
Unit |
Equipment |
Height (m) |
Additional description |
|
Date time |
− |
− |
− |
UTC |
|
Water vapour isotopic ratio (18O) |
per mil |
Picarro L2120-i |
24.3 |
Normalized to V-SMOW; Humidity dependence correlation: Non-linear regression of water vapour concentration |
|
Standard deviation of 18O |
per mil |
Picarro L2120-i |
24.3 |
Hourly |
|
Water vapour isotopic ratio (D) |
per mil |
Picarro L2120-i |
24.3 |
Normalized to V-SMOW; Humidity dependence correlation: Non-linear regression of water vapour concentration |
|
Standard deviation of D |
per mil |
Picarro L2120-i |
24.3 |
Hourly |
|
Air temperature |
Celsius (°C) |
HMP-35D |
21.5 |
− |
|
Relative humidity |
<=100% |
HMP-35D |
21.5 |
− |
|
Air pressure |
Pa |
PTB-101B |
12 |
− |
|
Precipitation |
mm |
USCRN Precip Data |
− |
− |
|
Net radiation |
W/m2 |
REBS Q-7.1 |
25.5 |
− |
|
Wind speed |
m/s |
CSAT3 |
21.5 |
− |
|
Wind direction |
°C |
CSAT3 |
21.5 |
− |
|
Air temperature |
K |
− |
2 |
ERA5 |
|
Relative humidity |
<=100% |
− |
2 |
ERA5 |
|
Air pressure |
Pa |
− |
2 |
ERA5 |
|
Precipitation |
mm |
− |
− |
ERA5 |
|
Net radiation |
W/m2 |
− |
− |
ERA5 |
|
Wind speed |
m/s |
− |
10 |
ERA5 |
|
Wind direction |
°C |
− |
10 |
ERA5 |
Reference papers
Berkelhammer, M., Noone, D., Wong, T.E., Burns, S.P., Knowles, J.F., Kaushik, A., Blanken, P.D. and Williams, M.W., 2016. Convergent approaches to determine an ecosystem’s transpiration fraction. Global Biogeochemical Cycles.
Site contact
Name: Max Berkelhammer and David Noone
Email: berkelha@uic.edu (Max Berkelhammer) and dcn@coas.oregonstate.edu (David Noone)