Variables in NIWOT07 5-Minute Data Set

Most variables will have a "time" dimension, indicating they are time-series variables. Variables with a "station" dimension were sampled at more than one station or site.

Variables with a "sample" dimension are available at a resolution of 1/sample times the resolution of the dataset. For example, in a file of 5 minute statistics, a sample dimension of 5 indicates that the variable is available at 1 minute resolution.

For more information on variable names, see the ISFF Variable Name Convention .

Variables that were slowly sampled (usually once per second, or less) start with an upper case character (P, RH, T, etc). Lower case is used for more rapidly sampled variables, typically those used in eddy correlation, like u,v,w,tc,h2o, etc.

Higher moments are represented by products of variables, separated by single quotes. For example, u'v' is the covariance of u and v.

To save space, third and fourth moments of eddy correlation variables aren't listed in the table, but are available in the datasets.

Standard NetCDF variable names should only contain alphanumeric characters and underscores. Therefore, in Netcdf files the actual variable names will be the variable name shown here, with underscores substituted for periods and quotes. The variable name shown in this table will be saved as the "short_name" attribute of the Netcdf variable.

Variable Name	Description	Units	Dimension	Sensor	Notes
base_time	Seconds since 1970 Jan 1 00:00 GMT	seconds
time	Seconds since base_time	seconds	time
Dir.1m	Wind Direction	deg	time
P.1m	Barometric Pressure	mb	time
RH.1m	Rel. Humidity	%	time
Spd.1m	Wind Speed	m/s	time
T.1m	Air Temp	degC	time
Vbatt.1m	Battery Voltage	V	time
id.1m			time
raina.1m	Rain Accumulation	mm	time
tc'tc'.0.5m	tc variance	(degC)^2	time
tc'tc'.1m	tc variance	(degC)^2	time
tc'tc'.2m	tc variance	(degC)^2	time
tc.0.5m	Virtual Temperature	degC	time
tc.1m	Virtual Temperature	degC	time
tc.2m	Virtual Temperature	degC	time
tcflag.0.5m	Spike fract for tc		time
tcflag.1m	Spike fract for tc		time
tcflag.2m	Spike fract for tc		time
u'tc'.0.5m	u tc covariance	m/s degC	time
u'tc'.1m	u tc covariance	m/s degC	time
u'tc'.2m	u tc covariance	m/s degC	time
u'u'.0.5m	u variance	(m/s)^2	time
u'u'.1m	u variance	(m/s)^2	time
u'u'.2m	u variance	(m/s)^2	time
u'v'.0.5m	u v covariance	(m/s)^2	time
u'v'.1m	u v covariance	(m/s)^2	time
u'v'.2m	u v covariance	(m/s)^2	time
u'w'.0.5m	u w covariance	(m/s)^2	time
u'w'.1m	u w covariance	(m/s)^2	time
u'w'.2m	u w covariance	(m/s)^2	time
u.0.5m	Sonic U Wind Comp	m/s	time
u.1m	Sonic U Wind Comp	m/s	time
u.2m	Sonic U Wind Comp	m/s	time
uflag.0.5m	Spike fract for u		time
uflag.1m	Spike fract for u		time
uflag.2m	Spike fract for u		time
usamples.0.5m	# of samples averaged		time
usamples.1m	# of samples averaged		time
usamples.2m	# of samples averaged		time
v'tc'.0.5m	v tc covariance	m/s degC	time
v'tc'.1m	v tc covariance	m/s degC	time
v'tc'.2m	v tc covariance	m/s degC	time
v'v'.0.5m	v variance	(m/s)^2	time
v'v'.1m	v variance	(m/s)^2	time
v'v'.2m	v variance	(m/s)^2	time
v'w'.0.5m	v w covariance	(m/s)^2	time
v'w'.1m	v w covariance	(m/s)^2	time
v'w'.2m	v w covariance	(m/s)^2	time
v.0.5m	Sonic V Wind Comp	m/s	time
v.1m	Sonic V Wind Comp	m/s	time
v.2m	Sonic V Wind Comp	m/s	time
vflag.0.5m	Spike fract for v		time
vflag.1m	Spike fract for v		time
vflag.2m	Spike fract for v		time
vsamples.0.5m	# of samples averaged		time
vsamples.1m	# of samples averaged		time
vsamples.2m	# of samples averaged		time
w'tc'.0.5m	w tc covariance	m/s degC	time
w'tc'.1m	w tc covariance	m/s degC	time
w'tc'.2m	w tc covariance	m/s degC	time
w'w'.0.5m	w variance	(m/s)^2	time
w'w'.1m	w variance	(m/s)^2	time
w'w'.2m	w variance	(m/s)^2	time
w.0.5m	Sonic W Wind Comp	m/s	time
w.1m	Sonic W Wind Comp	m/s	time
w.2m	Sonic W Wind Comp	m/s	time
wflag.0.5m	Spike fract for w		time
wflag.1m	Spike fract for w		time
wflag.2m	Spike fract for w		time
wsamples.0.5m	# of samples averaged		time
wsamples.1m	# of samples averaged		time
wsamples.2m	# of samples averaged		time