#US-Los Lost Creek Data - http://ameriflux.ornl.gov/fullsiteinfo.php?sid=99 - http://fluxnet.ornl.gov/site/931 - http://flux.aos.wisc.edu/twiki/bin/view/Main/ChEASData
#Latitude: 46.0827 Longitude: -89.9792 Elevation: 480 m Vegetation: Shrub wetland
#Tower measurement height: 10.2 m   Canopy height: 2.0 m
#Data Output On Mar2013 revision: Fri Mar  8 16:21:07 2013
#
#Contact Information: Ankur R Desai desai@aos.wisc.edu
#Missing or invalid data is reported as -999.0. Data starts on line 97
#Time is recorded at the beginning of average period. The averaging interval is 30 minutes.
#Timezone is US Central Standard Time UTC-6
#
# Data column Information
# 1  Year                                                                      YYYY
# 2  Month                                                                     MM
# 3  Day                                                                       DDD
# 4  Hour                  Local time (UTC-6)                                  HH.H
# 5  Day_Fraction                                                              DDD.DDDDDD
# 6  Year_Fraction                                                             YYYY.YYYYYYYY
# 7  NEE_CO2               NEE of CO2                                          umol m-2 s-1
# 8  LE                    Latent heat flux (storage corrected)                W m-2
# 9  H                     Sensible heat flux (storage corrected)              W m-2
# 10 ustar                 Preferred friction velocity(a)                      m s-1
# 11 Tsoil                 Filled 5cm soil temperature(a)                      degrees C
# 12 PAR                   Filled photosynthetic active radiation(a)           umol m-2 s-1
# 13 Tair                  Filled air temperature at 10.2 m(a)                 degrees C
# 14 H2O                   Preferred water vapor mixing ratio at 10.2 m(a)     g kg-1
# 15 VPD                   Preferred vapor pressure deficit at 10.2 m(a)       Pa
# 16 WS                    Preferred wind speed at 10.2 m(a)                   m s-1
# 17 WDir                  Preferred wind direction at 10.2 m(a)               degrees
# 18 Precipitation         Precipitation(a)                                    mm
# 19 CO2                   Preferred CO2 concentration at 10.2m(a)             ppm
# 20 Pressure              Air pressure at 10.2 m not sea-level corrected      kPa
# 21 C_flag                Flag for screening of NEE(b)                        unitless
# 22 Q_flag                Flag for LE(b)                                      unitless
# 23 H_flag                Flag for H(b)                                       unitless
# 24 M_flag                Flag for ustar(b)                                   unitless
# 25 Ustar_10              Non-filled friction velocity at 10.2 m              m s-1
# 26 NEE_CO2_filled        Gap filled NEE_CO2(c)                               umol m-2 s-1
# 27 Reco                  Ecosystem respiration(c)                            umol m-2 s-1
# 28 GPP                   Gross primary production(c)                         umol m-2 s-1
# 29 NEE_CO2_modeled       Modeled NEE(c)                                      umol m-2 s-1
# 30 Storage_CO2           Storage of CO2 at 10.2 m                            umol m-2 s-1
# 31 Flux_CO2              Turbulent flux of CO2 at 10.2 m                     umol m-2 s-1
# 32 Storage_H2O           Storage of H2O at 10.2 m                            W m-2
# 33 Flux_H2O              Turbulent flux of H2O at 10.2 m                     W m-2
# 34 Storage_T             Storage of heat at 10.2 m                           W m-2
# 35 Flux_T                Turbulent flux of heat at 10.2 m                    W m-2
# 36 CO2_1                 CO2 concentration at 1.2 m                          ppm
# 37 CO2_2                 CO2 concentration at 1.8 m                          ppm
# 38 CO2_3                 CO2 concentration at 3.0 m                          ppm
# 39 CO2_6                 CO2 concentration at 5.5 m                          ppm
# 40 CO2_10                CO2 concentration at 10.2 m                         ppm
# 41 H2O_10                Water vapor mixing ratio at 10.2 m                  g kg-1
# 42 Tair_1                Air temperature at 1.2 m                            degrees C
# 43 Tair_2                Air temperature at 1.8 m                            degrees C
# 44 Tair_3                Air temperature at 3.0 m                            degrees C
# 45 Tair_6                Air temperature at 5.5 m                            degrees C
# 46 Tair_10               Air temperature at 10.2 m                           degrees C
# 47 Ttree_N               Tree temperature at north side                      degrees C
# 48 Ttree_S               Tree temperature at south side                      degrees C
# 49 PAR_10                Photosynthetic active radiation at 10.2 m           umol m-2 s-1
# 50 NetRad_10             Net radiation at 10.2 m                             W m-2
# 51 Solar_In              Solar incoming at 10.2 m                            W m-2
# 52 Solar_Out             Solar reflected at 10.2 m                           W m-2
# 53 WS_10                 Wind speed at 10.2 m                                m s-1
# 54 Wdir_10               Wind direction at 10.2 m                            degrees
# 55 Tsoil_0               Soil temperature at surface                         degrees C
# 56 Tsoil_0_5             Soil temperature at 5 cm                            degrees C
# 57 Tsoil_0_10            Soil temperature at 10 cm                           degrees C
# 58 Tsoil_0_20            Soil temperature at 20 cm                           degrees C
# 59 Tsoil_0_50            Soil temperature at 50 cm                           degrees C
# 60 Tsoil_1               Soil temperature at 100 cm                          degrees C
# 61 G                     Soil heat flux at 75 mm                             W m-2
# 62 Water_Depth           Water Table depth                                   cm
# (a) Meteorological products: PAR / Tair / Tsoil / H2O / VPD / Wind Speed / Wind Dir / Precipitation are hybrid products
#     PAR/Tair/H2O/VPD/Wind Speed/Wind Dir are merged with nearby sensors as noted. No gaps in PAR Tair or Tsoil. Gaps in others are present
#     PAR: Gaps filled with nearby PAR sensor observations or long-term ensemble average for small gaps
#     Tair: 5.5 m Air temperature combined with nearby observations. 10 m air temperature has drift problem
#     Tsoil: Because of water table depth fluctuation we use 50 cm soil temperature filled with ensemble average where gaps present
#     H2O: Water vapor mixing ratio combined from Vaisala and Licor sensors and filled where available with NTL LTER Woodruff airport or Willow Creek observation
#     VPD: Vapor pressure deficit derived from H2O/filled air temperature/filled surface air pressure
#     Windspeed and direction: 10 m wind speed from sonic anemometer and filled where available with Woodruff airport observation
#     Precipitation: Where available gaps filled with NTL LTER Woodruff airport observation
# (b) Flag descriptions of CO2/H/LE:
#     -1 indicates bad or missing value replaced with -999
#     0 indicates good observation
#     1 indicates night ustar less than 0.05 m s-1 (discard data)
# (c) u* is taken from 10 m and a linear fit of preferred wind speed at 10 m based on u_star_flag
#     1 = ustar at 10 m
#     2 = preferred wind speed at 10 m: linearly fit to ustar at 10m (r=0.88)
#     For the true 10m u* see variable ustar_10
# (d) Gap filled NEE based on Desai et al. 2005 AgForMet moving window regression of filled 50 cm soil temperature and PAR to ustar screened NEE
#     Reco derived from nighttime NEE and temperature
#     GPP reported here is the model fit of NEE residual to PAR. For a more data-based GPP used Reco-NEE_Filled
#     NEE_Model is equal to Reco-GPP
#     Given missing winter data after 2007 - we used long term ensemble average to fill winter gaps in 2007-2010 - except no data in 2009
year,month,day,hour,day_fraction,year_fraction,nee_co2,le,h,ustar,tsoil,par,tair,h2o,vpd,ws,wdir,precipitation,co2,pressure,c_flag,q_flag,h_flag,m_flag,ustar_30,nee_co2_filled,reco,gpp,nee_co2_modeled,storage_co2,flux_co2,storage_h2o,flux_h2o,storage_t,flux_t,co2_1,co2_2,co2_3,co2_6,co2_10,h2o_10,tair_1,tair_2,tair_3,tair_6,tair_10,ttree_n,ttree_s,par_10,netrad_10,solar_in,solar_out,ws_10,wdir_10,tsoil_0,tsoil_0_5,tsoil_0_10,tsoil_0_20,tsoil_0_50,tsoil_1,g,water_depth
