Sylvania Wilderness (US-Syv) Readme Post 2012 data The US-Syv site was restarted in mid 2012 after being offline since middle of 2008. During this process, most of the instrumentation was replaced and most profiles were decommissioned. Flux processing was transitioned to EddyPro. The same tower and power system is in use. Below, notes on each variables in the new data file is provided. #Contact Information: Ankur R Desai desai@aos.wisc.edu #Missing or invalid data is reported as -9999.0. #Time is recorded at the beginning of average period. The averaging interval is 30 minutes. #Timezone is US Central Standard Time UTC-6 YEAR - Year GAP - 0 indicates good NEE observations 1 indicates missing value (if NEE is -9999) or value should be discarded for: nighttime u* < 0.325 Wind direction between 30 and 90 degrees (lake fetch) DTIME - Fractional day of year DOY - Day of year HRMIN - Hour and minute in HHMM format, UTC-6 UST - Ustar m/s TA - Air Temperature in degrees C WD - From wind direction in degrees at 36 m WS - Wind speed at 36 m NEE - Net ecosystem exchange of CO2 in umol/m2/s *Storage profile added June 18, 2014, single point storage prior *EC150 IRGA from 2012 until Day 123 (May 2) in 2013 *LI-7500 IRGA since May 2, 2013 FC - Turbulent Flux of CO2 at 36 m in umol/m2/s SFC - Storage flux of CO2 from 0-36 m in umol/m2/s H - Sensible heat flux (storage corrected) at 36 m in W/m2 SH - Storage of heat flux from 0-36 m in W/m2 LE - Latent heat flux (storage corrected) at 36 m in W/m2 SLE - Storage of latent heat flux from 0-36 m in W/m2 FG - Soil heat flux in W/m2 (currently not available from 2012) TS1 - Soil temperature at 10 cm depth in degrees C *This soil pit is different than per 2012 pit, located ~20 m TSdepth1 - Depth of TS1 in meters TS2 - Soil temperature at 20 cm depth in degrees C *This soil pit is different than per 2012 pit, located ~20 m TSDepth2 - Depth of TS2 in meters PREC - Precipitation in mm *Precipitation gauge has been moved to small clearing near tower *No snowfall adapter RH - Relative humidty at 36 m in % PRESS - Atmospheric pressure at 36 m in kPa CO2 - Atmospheric CO2 at 36 m in umol/mol *Unlike pre 2012, this CO2 is based directly from turbulent flux sensor, no closed path storage profile system is available at this height VPD - Vapor pressure deficit at 36 m in kPA SWC1 - Soil volumetric water content 10 cm (integrated 0-10) depth SWC2 - Soil volumetric water content 20 cm (integrated 10-20) depth * SWC is in a new pit near the tower and not continuous with pre-2008 SWC Rn - Above canopy Net Radiation at 36 m in W/m2 * New Kipp and Zonen CNR4 4-component radiometer installed in 2012 PAR - Incoming photosynthetic active radiation at 36 m in umol/m2/s Rg - Incoming solar radiation from CNR4 at 36 m in W/m2 Rgdif - Diffuse solar radiation (not recorded) PARout - Outgoing PAR (not recorded) Rgout - Outgoing solar radiation from CNR4 at 36 m in W/m2 Rgl - Incoming long wave radiation from CNR4 at 36 m in W/m2 RglOut - Outgoing long wave radiation from CNR4 in 36 m in W/m2 H2O - Water vapor concentration from IRGA at 36 m in mmol/mol RE - Inferred Ecosystem respiration from Desai et al 2005 model in umol/m2/s GPP - Inferred Gross Primary Productivity in umol/m2/s from Desai et al 2005 model CO2top - CO2 concentration in ppm from Visalia GMP343 sensor on tower * This profile was installed in June 2014 and differs from pre2012 LI-6251 based profile CO2height - Height of CO2top in meters APAR - Absorbed PAR (not recorded) PARdif - Diffuse PAR (not recorded) APARpct - Precent absorbed PAR not recorded ZL - dimensionless Monin-Obhukov Length NEEFilled - Gap-filled NEE (either modeled NEE from RE and GPP is Gap = 1, else NEE is Gap = 0) in umol/m2/s Flagu* - Quality flag for u* from Foken criteria (0 = good, 1 = ok but not for long term, 2 = discard) FlagH - Quality flag for sensible heat flux FlagLE - Quality flag for latent heat flux FlagC - Quality Flag for CO2 flux FlagE - Quality Flag for H2O flux FetchMax - Kljun footprint model distance of maximum footprint in m Fetch90 - 90% upwind influence distance in m Log of issues: 02 may 2012 Gap in data from 14:38:50 to 15:04:32 12 may 2012 - 18/05/2012 Problem retreiving data 26 may 2012 - 27/05/2012 Problem retreiving data 12 june 2012 - 22/06/2012 Problem retreiving data 23 june 2012 - Missing data between 05:40:12.8 and 10:59:53.0 AM 24 june 2012 - Missing data between 05:52:57.5 and 10:59:57.6 AM 24 june 2012 - 25/06/2012 Gap from 24th night to the morning of 25th 25 june 2012 - Gap between 06:10:05.0 and 07:04:56.0 AM 02 july 2012 - Gap due to communication problems from 00:45:07.6 to 07:04:57.0 03 july 2012 - Gap due to communication problems from 01:26:44.6 to 07:04:56.0 04 july 2012 - Gap due to communication problems from 03:45:05.6 to 07:04:58.0 05 july 2012 - Gap due to communication problems from 04:30:50.2 to 06:40:00.0, from 07:21:26.7 to 07:45:02.0 continued: , from 08:04:28.9 to 08:19:54.0, and from 08:28:55.4 to 11:22:03.0. 16 july 2012 - Gap from 01:26:44.1 to 11:04:56.0 22 July 2012 - Gap from 00:58:55.1 to 11:04:55.2" 23 July 2012 - Gap from 00:00:05.1 to 08:20:00.0" 25 July 2012 - 10 minutes gap at 8:30 to 08:40:54.0 27 July 2012 - gap from 11:00:10.3 to 11:15:12.0 07 August 2012 - 14/08/2012 Datalogger out due to short circuit on the Soil moisture cables 13 September 2012 - interruption in the morning to solve computer problems 24 September 2012 - interruption in the morning to solve computer problems 27 September 2012 - soil probes disconnected to avoid short circuits. 01 November 2012 - gap between 20:15:07.9 to 22:00:00 February 2013 - EC150 began to fail, leading to a halt in the CSAT readings. 01 May 2013 - LICOR 7500 installed at sylvania to replace the EC150. CO2 and H2O units changed to mmol/m3 24 August 2013 - 11 September 2013: Datalogger pannel shorted and CSAT damaged. CR3000, CSAT3 and soil probes replaced 05 June 2014- 06 June 2014: Instalation of new sensors and maintanence 12 November 2014 - 13 November 2014: Datalogger reseted deleting data from the 12th and 13th.