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). If you have any question about the data, please contact with DR.Huang at hjp@lzu.edu.cn 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: Level 1.5. Real Time Cloud Screened data.

The following data are automatically cloud cleared but may not have final calibration applied. These data are not Quality Assured. Version 2 Direct Sun Algorithm Location=SACOL,long=104.137,lat=35.946,elev=1965,Nmeas=6,PI=Jianping_Huang_and_Wu_Zhang,Email=hjp@lzu.edu.cn_and_wzhang@lzu.edu.cn AOD Level 1.5,All Points,UNITS can be found at,,, http://aeronet.gsfc.nasa.gov/data_menu.html Date(dd-mm-yy),Time(hh:mm:ss),Julian_Day,AOT_1640,AOT_1020,AOT_870,AOT_675,AOT_667,AOT_555,AOT_551,AOT_532,AOT_531,AOT_500,AOT_490,AOT_443,AOT_440,AOT_412,AOT_380,AOT_340,Water(cm),%TripletVar_1640,%TripletVar_1020,%TripletVar_870,%TripletVar_675,%TripletVar_667,%TripletVar_555,%TripletVar_551,%TripletVar_532,%TripletVar_531,%TripletVar_500,%TripletVar_490,%TripletVar_443,%TripletVar_440,%TripletVar_412,%TripletVar_380,%TripletVar_340,%WaterError,440-870Angstrom,380-500Angstrom,440-675Angstrom,500-870Angstrom,340-440Angstrom,440-675Angstrom(Polar),Last_Processing_Date,Solar_Zenith_Angle Level1.0 : Original data Level1.5 : Cloud Screened data Level2.0 : Quality Assured Data