The ISFS 30 minute flux dataset for PCAPS contains sensible and latent heat fluxes, friction velocity, total radiation and surface heat flux, as measured by the 7 NCAR Integrated Surface Flux System (ISFS) stations during PCAPS.
The dataset consists of 4 small NetCDF files on the EOL Field Data Archive.
- pcaps30m_20101101.nc
- pcaps30m_20101201.nc
- pcaps30m_20110101.nc
- pcaps30m_20110201.nc
Each file contains one month's data starting at the first of the month indicated in the file name
The missing data value is 1.0 x 1037, indicating data is not available at the corresponding time for the given variable. The first ISFS measurements were recorded on Nov 10, 2010. Therefore, values for all time-series variables will be filled with 1x1037 for the initial portion of pcaps30m_20101101.nc.
The variables in the NetCDF files are defined by one or more of the following dimensions:
| Dimension name |
size |
description |
| time |
1440 or 1448 |
number of 1/2 hour periods in the month |
| station |
7 |
index for each of the 7 ISFS stations |
The variables in the NetCDF files are:
| Variable name |
units |
dimensions |
description |
| base_time |
seconds |
none (scalar) |
POSIX time, non-leap seconds since 1970-01-01 00:00:00 00:00 UTC of 0:00 UTC of the first day of the month |
| time |
seconds |
time |
middle of sampling period, in seconds since base_time. |
| LE |
W/m2 |
time,station |
latent heat flux, positive is upward |
| H |
W/m2 |
time,station |
sensible heat flux, positive is upward |
| u_ (*) |
m/s |
time,station |
u*, friction velocity |
| Rsum |
W/m2 |
time,station |
total radiation, positive downward, from pyranometer and pyrgeometer measurements at 2 meters |
| Gsfc |
W/m2 |
time,station |
surface heat flux, positive is upward |
| Gsfc_aux |
W/m2 |
time,station |
surface heat flux at auxiliary soil measurement sites of stations 1, 5 and 6 |
| latitude |
degrees-north |
station |
|
| longitude |
degrees-east |
station |
|
| altitude |
m |
station |
Approximate station altitude, above sea level |
| sonicHeight |
m |
station |
Approximate height above ground of sonic anemometer and fast hygrometer eddy correlation measurements |
* By convention, NetCDF variable names are limited to A-Z, a-z, 0-9 and underscore characters. The usual name for the friction velocity is "u*", which is converted to "u_" as a NetCDF variable. See the "short_name" attribute for each variable, which does not have a restricted character set.