SACOL Site Data Information:

Reference Site:  SACOL 
Time Period: March 01,2007 to May 31,2007



SACOL(Semi-Arid Climate and Environment Observatory of 
Lanzhou  University) is supported by Lanzhou University and operated by College of  Atmospheric Sciences. 
It is an international research observatory and led by  Dr. Jianping Huang (Chief Scientist) and Dr. Wu Zhang
 (Operational  Manager). SACOL consists of a large set of instruments. 


Location: Latitude:35.946N     longitude:104.137E
 
Elevation: 1965.8 m   Land Cover: moderation  
Surface Type: loess tableland, ridge, hillock and gully 
 


WEB:http://climate/index.asp

The data can be open and read by TXT, IDL,fortran and some other tools.

Header of the file is listed as following:

"TOA5","1997","CR5000","1997","1.9","CPU:OPEC_V1.CR5","27547","flux"
"TIMESTAMP","RECORD","Fc_wpl","LE_wpl","Hs","tau","u_star","cov_Uz_Uz(1)","cov_Uz_Ux(1)","cov_Uz_Uy(1)","cov_Uz_co2(1)","cov_Uz_h2o(1)","cov_Uz_Ts(1)","cov_Ux_Ux(1)","cov_Ux_Uy(1)","cov_Ux_co2(1)","cov_Ux_h2o(1)","cov_Ux_Ts(1)","cov_Uy_Uy(1)","cov_Uy_co2(1)","cov_Uy_h2o(1)","cov_Uy_Ts(1)","cov_co2_co2(1)","cov_h2o_h2o(1)","cov_Ts_Ts(1)","Ux_Avg(1)","Uy_Avg(1)","Uz_Avg(1)","co2_Avg(1)","h2o_Avg(1)","Ts_Avg(1)","rho_a_Avg","press_Avg(1)","panel_temp_Avg","wnd_dir_compass(1)","wnd_dir_csat3(1)","wnd_spd(1)","rslt_wnd_spd(1)","batt_volt_Avg","std_wnd_dir(1)","n_Tot","csat_warnings","irga_warnings","del_T_f_Tot(1)","track_f_Tot(1)","amp_h_f_Tot(1)","amp_l_f_Tot(1)","chopper_f_Tot(1)","detector_f_Tot(1)","pll_f_Tot(1)","sync_f_Tot(1)","agc_Avg(1)","Fc_irga","LE_irga","co2_wpl_LE","co2_wpl_H","h2o_wpl_LE","h2o_wpl_H","h2o_hmp_Avg(1)","t_hmp_Avg(1)","rh_hmp_Avg(1)"
"TS","RN","mg/(m^2 s)","W/m^2","W/m^2","kg/(m s^2)","m/s","(m/s)^2","(m/s)^2","(m/s)^2","mg/(m^2 s)","g/(m^2 s)","m C/s","(m/s)^2","(m/s)^2","mg/(m^2 s)","g/(m^2 s)","m C/s","(m/s)^2","mg/(m^2 s)","g/(m^2 s)","m C/s","(mg/m^3)^2","(g/m^3)^2","C^2","m/s","m/s","m/s","mg/m^3","g/m^3","C","kg/m^3","kPa","C","degrees","degrees","m/s","m/s","V","degrees","samples","samples","samples","samples","samples","samples","samples","samples","samples","samples","samples","unitless","mg/(m^2 s)","W/m^2","mg/(m^2 s)","mg/(m^2 s)","W/m^2","W/m^2","g/m^3","C","fraction"
"","","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Smp","Avg","Avg","Avg","Avg","Avg","Avg","Avg","Avg","Avg","Smp","Smp","Smp","Smp","Avg","Smp","Tot","Tot","Tot","Tot","Tot","Tot","Tot","Tot","Tot","Tot","Tot","Avg","Smp","Smp","Smp","Smp","Smp","Smp","Avg","Avg","Avg"





Ux(1)                         Horizontal wind speed£¨x-Axis£© [m / s] 
Uy(1)                         Horizontal wind speed£¨y-Axis£© [m / s] 
Uz(1)                         Vertical wind speed  [m / s] 
co2(1)                        Absolute concentration of carbon dioxide  [mg / m]
h2o(1)                        Absolute density of water vapour [g / m^3] 
Ts(1)                         Sonic temperature [C] 
press(1)                       Press of LI-7500 system [kPa] 
diag_csat(1)                    Diagnostic value of CSAT3 [unitless]


Flux Table
Variables				  Description

Fc_wpl				  CO2 flux by WPL correction [mg/{m^2s}]
LE_wpl			      Latent heat flux by WPL correction [W/m^2]
Hs				      Sensible heat flux calculate by sonic temperature [W/m^2]
tau					  momentum flux  [kg/{ms^2}]
u_star				  friction velocity[m/s]
Fc_irga				  CO2 flux with out WPL correction [mg/{m^2s}]
LE_irga				  Latent heat flux without WPL correction [W/m^2]
co2_wpl_LE	Latent heat modification of the CO2 flux by WPL correction [mg/{m^2s}]
co2_wpl_H	Sensible heat modification of the CO2 flux by WPL correction [mg/{m^2s}]
h2o_wpl_LE           Latent heat modification of the latent heat flux by WPL correction [mg/{m^2s}]
h2o_wpl_H	Sensible heat modification of the latent heat flux by WPL correction [mg/{m^2s}]
cov_Uz_Uz(1)		  Variance of vertical wind speed [(m/s)^2]
cov_Uz_Ux(1)          Covariance of vertical wind speed and horizontal wind speed (Ux) [(m/s)^2]
cov_Uz_Uy(1)	Covariance of vertical wind speed and horizontal wind speed (Uy) [(m/s)^2]
cov_Uz_co2(1)	Covariance of vertical wind speed and CO2 concentration [mg/{m^2s}]

cov_Uz_h2o(1)	Covariance of vertical wind speed and water vapour density [g/{m^2s}]
cov_Uz_Ts(1)          Covariance of vertical wind speed and sonic temperature [mC/s]
cov_Ux_Ux(1)		    Variance of horizontal wind speed (Ux) [(m/s)^2]
cov_Ux_Uy(1)			Covariance of horizontal wind speed (Ux) and (Uy)[(m/s)^2]
cov_Ux_co2(1)	Covariance of horizontal wind speed (Ux) and CO2 concentration [mg/{m^2s}]
cov_Ux_h2o(1)	Covariance of horizontal wind speed (Ux) and water vapour density [g/{m^2s}]
cov_Ux_Ts(1)          Covariance of horizontal wind speed (Ux) and sonic temperature [mC/s]
cov_Uy_Uy(1)			Variance of horizontal wind speed (Uy) [(m/s)^2]
cov_Uy_co2(1)	Covariance of horizontal wind speed (Uy) and CO2 concentration [mg/{m^2s}]
cov_Uy_h2o(1)	Covariance of horizontal wind speed (Uy) and water vapour density [g/{m^2s}]
cov_Uy_Ts(1)          Covariance of horizontal wind speed (Uy) and sonic temperature [mC/s]

cov_co2_co2(1)			Variance of CO2 concentration [(mg/m^3)^2]
cov_h2o_h2o(1)			Variance of water vapour density [(g/m^3)^2]
cov_Ts_Ts(1)			Variance of sonic temperature [C^2]

Ux_Avg(1)				Mean of horizontal wind speed (Ux) [m/s]
Uy_Avg(1)				Mean of horizontal wind speed (Uy) [m/s]
Uz_Avg(1)				Mean of vertical wind speed [m/s]
co2_Avg(1)				Mean of CO2 concentration  [mg/m^3]
h2o_Avg(1)				Mean of water vapour density [g/m^3]
Ts_Avg(1)				Mean of sonic temperature[C]
press_Avg(1)			Mean of air pressure [kPa]
rho_a_Avg(1)			Mean of air density [kg/m^3]
h2o_hmp_Avg(1)			Mean of water vapour density measured by HMP45C[g/m^3]
t_hmp_Avg(1)			Mean of air temperature measured by HMP45C [C]
rh_hmp_Avg(1)			Mean of air relative humidity by HMP45C [fraction]
e_hmp_Avg(1)			Mean of vapour pressure by HMP45C [kPa]

wnd_dir_compass(1)		wind direction in the compass coordinate system [degrees]
wnd_dir_csat3(1)		wind direction in the CSAT3 coordinate system [degrees]
wnd_spd(1)				horizontal wind speed average[m/s]
rslt_wnd_spd(1)			horizontal wind speed by vectory compound [m/s]
std_wnd_dir(1)			The standard deviation	of compound wind direction [degrees]
n_Tot(1)	The total samples in statistic£¨flux£¬covariance£¬mean £©[samples]
csat_warning_Tot(1)		The total warnings from CSAT3 [samples]
irga_warning_Tot(1)		The total warnings from	LI-7500 [samples]
del_T_f_Tot(1)			The total sonic temperature warnings from CSAT3 [samples]
track_f_Tot(1)			The total signal locked warnings of	CSAT3 [samples]
amp_h_f_Tot(1)			The total signal amplify warnings of CSAT3 [samples]
amp_l_f_Tot(1)			The total signal amplify low warnings of CSAT3 [samples]
chopper_f_Tot(1)		The total warnings of LI-7500 chopper [samples]
detector_f_Tot(1)		The total detector warnings of LI-7500 [samples]	
pll_f_Tot(1)			Phasic locked circle of	LI-7500 [samples]
sync_f_Tot(1)				The total synchronization warnings LI-7500 [samples]
agc_Avg(1)				The average of LI-7500AGC [unitless]
batt_volt_Avg(1)		The average voltage of battery[V]
panel_temp_Avg(1)		The average temperature of panel [C]




Original data: the direct data from the instrument.
The data after treatment: Quality Assured data.