Duke Forest Hardwoods, North Carolina, USA

Name value
Principal investigator Gabriel Katul and Ram Oren
Site name Duke Forest Hardwoods, North Carolina, USA
Site description DBF Deciduous Broadleaf Forest
Latitude 35.9736
Longitude -79.1004
Elevation 168
crdate 08JUN2011


 
Duke Forest Hardwoods, North Carolina, USA
input files and their date ranges

Obs OrigFile mindate maxdate nrec
1 HWRAW.txt 01/01/2001 12/31/2005 87648
2 ORNL_data_H.csv 01/01/2001 12/31/2005 87648
3 DukeHardwood2003.csv 01/01/2003 12/31/2003 17520
4 DukeHardwood2004.csv 01/01/2004 12/31/2004 17568
5 DukeHardwood2005.csv 01/01/2005 12/31/2005 17520
6 NewFinal_Hardwood_2006.txt 01/01/2006 12/31/2006 17520
7 NewFinal_Hardwood_2007.txt 01/01/2007 12/31/2007 17520
8 NewFinal_Hardwood_2008.txt 01/01/2008 12/31/2008 17568


 
Duke Forest Hardwoods, North Carolina, USA
variable names and original descriptions

VarSource=/FLUXNET_Workshop/ORNL_data_H.csv,ORNL_readme.txt,ORNL_data.m 2001-2005

Obs col Variable Origdesc
1 6 UST UST (m/s) Friction velocity, calculated as the square root of kinematic momentum flux and expressed in m/s
2 7 TA TA (C) Air temperature, expressed in degrees Celsius
3 8 WD WD (deg) Wind direction, expressed in degrees clockwise from the North
4 9 WS WS (m/s) Wind speed, expressed in m/s, measured above the canopy
5 10 NEE NEE (umol/m2/s) Net ecosystem exchange, including subcanopy CO2 storage, expressed in umol/m2/s
6 11 FC_fill FC (umol/m2/s) CO2 flux or the rate of vertical transfer of CO2, not corrected for storage or advection, as calculated from measurements above the canopy expressed in umol/m2/s.
7 12 SFC__2 SFC (umol/m2/s) CO2 storage in the canopy air layer expressed in umol/m2/s.
8 13 H_fill H (W/m2) Sensible heat flux or the rate of vertical transfer of heat, not corrected for storage, measured above the canopy and expressed in W/m2
9 14 SH__2 SSA (W/m2) Sensible heat storage in the canopy air space, biomass, and soil above the soil heat plate expressed in W/m2
10 15 LE_fill LE (W/m2) Latent heat flux, not corrected for storage, measured above the canopy and expressed in W/m2
11 16 SLE SLA (W/m2) Latent heat storage in the canopy air layer expressed in W/m2
12 17 FG FG (W/m2) Soil heat flux expressed in W/m2
13 18 TS TS1 (C) Soil temperature expressed in degrees C
14 19 TSdepth TS1_depth (m) Measurement depth for TS1, expressed in cm
15 20 TS_25 TS2 (C) Soil temperature expressed in degrees C
16 21 TSdepth_25 TS2_depth (m) Measurement depth for TS2, expressed in cm
17 22 PREC PREC (mm) Rainfall or wintertime precitation expressed in mm
18 23 RH RH (frac.) Relative humidity of air, expressed as a percentage
19 24 PRESS PRESS (kPa) Barometric pressure expressed in kPa
20 25 CO2 CO2 (umol/mol) CO2 concentration expressed in umol/mol (i.e. ppm).
21 26 VPD VPD (kPa) Vapor pressure deficit, as the difference between the saturation water vapor pressure and the measured water vapor pressure, expressed in kPa
22 27 SWC SWC1 (%) Soil water content, based on time-domain measurement methods sensitive to dielectric permittivity, at depth 1 expressed in m3/m3. These data have been corrected and gapfilled by Chris Oishi S
23 28 SWC_25 SWC2 (%) Soil water content, based on time-domain measurement methods sensitive to dielectric permittivity, at depth 2 expressed in m3/m3. These data have been corrected and gapfilled by Chris Oishi S
24 29 Rn Rn (W/m2) Net radiation expressed in W/m2. Positive values denote downwards
25 30 PAR PAR (umol/m2/s) Incoming photosynthetically active radiation (i.e., radiation in the 0.4 to 0.7 micrometer waveband), measured above the canopy,and expressed in umol/m2/s
27 32 Rgdif fRg_in (W/m2) Incoming diffuse global solar radiation including reflected and scattered radiation from all portions of the sky, measured above the canopy, and expressed in W/m2. NOT MEASURED
28 33 PARout PARout (umol/m2/s) Reflected photosynthetically active radiation expressed in umol/m2/s
30 35 Rgl Rlong_in (W/m2) Incoming longwave radiation (i.e., radiation in the 4 to 100 micrometer waveband), measured above the canopy, expressed in W/m2
31 36 RglOut Rlong_out (W/m2) Outgoing longwave radiation, measured above the canopy, expressed in W/m2
32 37 H2O H2O (mmol/mol) Water vapor concentration above the canopy expressed in mmol/mol
33 38 RE Re (umol/m2/s) Total ecosystem respiration expressed in umol/m2/s
34 39 GEE GEE (umol/m2/s) Gross primary production or gross ecosystem production, including total ecosystem respiration (Re) and net ecosystem exchange (NEE), expressed in umol/m2/s
35 40 GPP GEP (umol/m2/s) Gross primary production or gross ecosystem production, including total ecosystem respiration (Re) and net ecosystem exchange (NEE), expressed in umol/m2/s
36 41 CO2__2 CO2 (umol/mol) If more than one co2 is reported, the measurement closest to the surface is above as CO2. the measurement from the highest sampling point is reported CO2 in umol/mol
37 42 ZEC ZEC (m) Indicates the height of the CO2 measurement expressed in meters
38 43 FC_f Fcgpf Gapfilling indicator function for CO2 flux (same as GAP) Fcgpf (boolean) - Fc gapfill indicator (1 for data, 0 for gapfilled)
39 44 LE_f LEgpf Gapfilling indicator function for LE Legpf (boolean) - LE gapfill indicator (1 for data, 0 for gapfilled)
40 45 H_f Hgpf Gapfilling indicator function for H Hgpf (boolean) - H, U* and WS gapfill indicator (1 for data, 0 for gapfilled)
41 46 XP xp (m) Peak of the source weight function of the footprint, calculated after Hsieh fh2o al. (2000)
 
VarSource=DukeHardwood2003.csv-2005,readme.2003_2005.txt

Obs col Variable Origdesc
42 5 SFC Sc (mg/m2*s) - carbon storage in canopy
43 6 NEE_fill NEE (mg/m2*s) - net ecosystem exchange
44 12 SH Sh (W/m2) - heat storage in canopy
45 43 Rg Swup (W/m2) - shortwave radiation from above - measured since 2004
46 44 RgOut SWdn (W/m2) - shortwave radiation from below - measured since 2004
 
VarSource=NewFinal_Hardwood_2006.txt-2008,Final_Ameriflux_Fieldnames_grass_and_hardwood.xls

Obs col Variable Origdesc
47 5 UST Frication velocity (u*) m/s
48 6 TA_fill Air Temperature degrees C
49 7 TA_f Air Temperature gapfilling function
50 8 WD_fill Wind Direction degrees from north
51 9 WD_f Wind Direction gapfilling funciton
52 10 WS_fill Wind speed m/s
53 11 WS_f Wind Speed gapfilling funciton
54 12 NEE NEE net ecossytem exchange (Fc + SFC) umol/m2/s
55 13 FC Fc carbon flux uncorrected for storage umol/m2/s
56 14 SFC Carbon Storage flux umol/m2/s
57 15 H Sensible Heat Flux W/m2
58 16 SH Sensible Heat Storage flux W/m2
59 17 LE Latent heat flux W/m2
60 18 SLE Latent heat storage flux W/m2
61 19 FG Ground heat flux W/m2
62 20 TS Soil Temperature at depth 1 degrees C
63 21 TSdepth Depth 1
64 22 TS_25 Soil Temperature at depth 2 degrees C
65 23 TSdepth_25 Depth 2
66 24 PREC Precipitation mm
67 25 RH_fill Relative Humidity %
68 26 RH_f Relative humidity gapfilling function
69 27 PRESS Air pressure kPa
70 28 CO2den CO2 concentration mg/m3
71 29 VPD_fill Vapor pressure deficit kPa
72 30 VPD_f Vapor pressure deficit gapfilling function
73 31 Rn Net Radiation W/m2
74 32 PAR_fill PAR Photosynthetically active radiation umol/m2/s
75 33 PAR_f PAR gapfilling function
76 34 PARdif Diffuse PAR umol/m2/s
77 35 PARout Outgoing PAR umol/m2/s
78 36 Rg_fill Incoming Shortwave radiation W/m2
79 37 Rg_f Incoming Shortwave radiation gapfilling function
80 38 RgOut_fill Outgoing Shortwave radiation W/m2
81 39 RgOut_f Outgoing Shortwave radiation gapfilling function
82 40 Rgdif Diffuse shortwave radiation W/m2
83 41 Rgl_fill Incoming longwave radiation W/m2
84 42 Rgl_f Incoming longwave radiation gapfilling function
85 43 RglOut_fill Outgoing longwave radiation W/m2
86 44 RglOut_f Outgoing longwave radiation gapfilling function
87 45 FH2O FH20 water vapor flux g/m2/s
88 46 H2Oden H2O g/m3
89 47 SWC Volumetric soil moisture content percent
90 48 SWCdepth Volumetric soil moisture content 1 depth cm
91 49 SWC_25 Volumetric soil moisture content 2 percent
92 50 SWCdepth_25 Volumetric soil moisture content 2 depth cm
 
VarSource=email Kimberly Novick 3/31/2011,HWRAW.txt 2001-2005

Obs col Variable Origdesc
93 4 FC carbon flux, uncorrected for storage (umol m-2 s-1)
94 5 LE latent heat flux (w m-2)
95 6 H sensible heat flux (w m-2)


 
Duke Forest Hardwoods, North Carolina, USA
variable edits

Obs Reset
1 * DUKE_HARDWOOD reset co2 to missing if co2 < 200 or co2 > 800 - Bai Yang 5/19/2011;
2 * DUKE_HARDWOOD reset co2den to missing if co2den < 10 or co2den > 25 - Bai Yang 5/19/2011;
3 * DUKE_HARDWOOD reset fc to missing if fc < -100 or fc > 80 - Bai Yang 5/19/2011;
4 * DUKE_HARDWOOD reset fg to missing if fg < -800 or fg > 800 - Tom Boden dec06;
5 * DUKE_HARDWOOD reset fh2o to missing if fh2o < -10 or fh2o > 25 - Bai Yang 27may2011 ;
6 * DUKE_HARDWOOD reset gpp to -gpp - Bai Yang 4/4/2011;
7 * DUKE_HARDWOOD reset h to missing if h < -300 or h > 800 - Bai Yang 5/19/2011;
8 * DUKE_HARDWOOD reset le to missing if le < -300 or le > 900 - Bai Yang 5/19/2011;
9 * DUKE_HARDWOOD reset nee to missing if nee < -100 or nee > 80 - Bai Yang 5/19/2011;
10 * DUKE_HARDWOOD reset nee_fill to missing if nee_fill < -100 or nee_fill > 80 - Bai Yang 5/19/2011;
11 * DUKE_HARDWOOD reset par to 0 if -60 <= latitude <= 60 and abs(par) > 10 and hour in (22,23,0,1,2) - Bai Yang 03mar09;
12 * DUKE_HARDWOOD reset par to missing if -60 <= latitude <= 60 and par < 5 and 10<=hour<=14 - Tom Boden 18jul06;
13 * DUKE_HARDWOOD reset par to missing if par < -20 - Bai Yang 03mar09;
14 * DUKE_HARDWOOD reset par_fill to 0 if -60 <= latitude <= 60 and abs(par_fill) > 10 and hour in (22,23,0,1,2) - Bai Yang 03mar09;
15 * DUKE_HARDWOOD reset par_fill to missing if -60 <= latitude <= 60 and par_fill < 5 and 10<=hour<=14 - Tom Boden 18jul06;
16 * DUKE_HARDWOOD reset par_fill to missing if par_fill < -20 - Bai Yang 03mar09;
17 * DUKE_HARDWOOD reset prec to 0 if prec < 0 - Tom Boden 25jul06;
18 * DUKE_HARDWOOD reset press to missing if press < 60 or press > 105 - Tom Boden dec06;
19 * DUKE_HARDWOOD reset rg to 0 if latitude<=60 and rg_fill>10 and hour in (22,23,0,1,2) - Bai Yang 03mar09;
20 * DUKE_HARDWOOD reset rg to missing if latitude<=60 and rg<=0 and 10<=hour<=14 - Bai Yang 15apr09;
21 * DUKE_HARDWOOD reset rg to missing if rg<-20 or rg>1370 - Bai Yang 03mar09;
22 * DUKE_HARDWOOD reset rg_fill to 0 if latitude<=60 and rg_fill>10 and hour in (22,23,0,1,2) - Bai Yang 03mar09;
23 * DUKE_HARDWOOD reset rg_fill to missing if latitude<=60 and rg_fill<=0 and 10<=hour<=14 - Bai Yang 15apr09;
24 * DUKE_HARDWOOD reset rg_fill to missing if rg_fill<-20 or rg_fill>1370 - Bai Yang 03mar09;
25 * DUKE_HARDWOOD reset sfc to missing if sfc < -100 or sfc > 100 - Bai Yang 5/19/2011;
26 * DUKE_HARDWOOD reset ts to missing if ts < -5 - Bai Yang 5/19/2011;
27 * DUKE_HARDWOOD reset ts_25 to missing if ts_25 < 0 - Bai Yang 5/19/2011;
28 * DUKE_HARDWOOD reset wd_fill to missing if wd_fill < 0 ;


 
Duke Forest Hardwoods, North Carolina, USA
number reset to missing or some other value

Obs variable nreset
1 co2 148
2 co2den 76
3 fc 4734
4 fg 24
5 fh2o 385
6 gpp 87648
7 h 137
8 le 1606
9 nee 3410
10 nee_fill 1
11 par 15
12 par_fill 3367
13 prec 52
14 press 3
15 rg 1
16 rg_fill 2
17 sfc 1009
18 ts 19
19 ts_25 28
20 wd_fill 2


 
Duke Forest Hardwoods, North Carolina, USA
variable conversions

Obs cline
1 * DUKE_HARDWOOD convert swc from fraction to percent;
2 swc = swc * 100;
3 * DUKE_HARDWOOD convert swc_25 from fraction to percent;
4 swc_25 = swc_25 * 100;
5 * DUKE_HARDWOOD convert tsdepth from m to cm;
6 tsdepth = tsdepth * 100;
7 * DUKE_HARDWOOD convert tsdepth_25 from m to cm;
8 tsdepth_25 = tsdepth_25 * 100;
9 * DUKE_HARDWOOD convert swc from fraction to percent;
10 swc = swc * 100;
11 * DUKE_HARDWOOD convert swc_25 from fraction to percent;
12 swc_25 = swc_25 * 100;
13 * DUKE_HARDWOOD convert h2oden from g/m3 to mmol/m3 - Bai Yang 11/21/2008 ;
14 h2oden = h2oden / 18.0 * 1000 ;
15 * DUKE_HARDWOOD convert co2den from mg/m3 to mmol/m3 - Bai Yang 11/21/2008 ;
16 co2den = co2den / 44.0 ;
17 * DUKE_HARDWOOD convert fh2o from g/m2/s to mmol/m2/s - Bai Yang 04aug09;
18 fh2o = fh2o /18 * 1000;
19 * DUKE_PINE convert nee_fill from mgC/m2/s to umol/m2/s - Bai Yang apr08 ;
20 nee_fill = nee_fill / .012;
21 * DUKE_PINE convert sfc from mgC/m2/s to umol/m2/s 2003 to 2005- Bai Yang apr08;
22 if '01jan03'd <= sasdate <= '31dec05'd then sfc = sfc / .012;


 
Duke Forest Hardwoods, North Carolina, USA
calculated variables

Obs cline
1 * DUKE_HARDWOOD calculate ta from ta_fill and ta_f;
2 ta = ifn(ta_f=1, ta_fill, .);
3 * DUKE_HARDWOOD calculate wd from wd_fill and wd_f;
4 wd = ifn(wd_f=1, wd_fill, .);
5 * DUKE_HARDWOOD calculate ws from ws_fill and ws_f;
6 ws = ifn(ws_f=1, ws_fill, .);
7 * DUKE_HARDWOOD calculate rh from rh_fill and rh_f;
8 rh = ifn(rh_f=1, rh_fill, .);
9 * DUKE_HARDWOOD calculate vpd from vpd_fill and vpd_f;
10 vpd = ifn(vpd_f=1, vpd_fill, .);
11 * DUKE_HARDWOOD calculate par from par_fill and par_f;
12 par = ifn(par_f=1, par_fill, .);
13 * DUKE_HARDWOOD calculate rg from rg_fill and rg_f;
14 rg = ifn(rg_f=1, rg_fill, .);
15 * DUKE_HARDWOOD calculate rgout from rgout_fill and rgout_f;
16 rgout = ifn(rgout_f=1, rgout_fill, .);
17 * DUKE_HARDWOOD calculate rglout from rglout_fill and rglout_f;
18 rglout = ifn(rglout_f=1, rglout_fill, .);
19 * DUKE_HARDWOOD calculate rgl from rgl_fill and _f;
20 rgl = ifn(rgl_f=1, rgl_fill, .);
21 * DUKE_HARDWOOD calculate co2 from co2den use press and ta - Bai Yang 18sep08;
22 if press not in (.,0) then co2 = co2den * 8.314 * (ta+273.15)/ press; else co2 = .;
23 * DUKE_HARDWOOD calculate h2o from h2oden use press and ta - Bai Yang 18sep08;
24 if press not in (.,0) then h2o = h2oden/1000 * 8.314 * (ta+273.15)/ press; else h2o = .;
25 * DUKE_HARDWOOD calculate preccum ;
26 preccum = ifn(first.year, prec, sum(preccum, prec));
27 * DUKE_HARDWOOD calculate fh2o_fill from le_fill and ta 2001-2005;
28 if '01jan01'd <=sasdate<= '31dec05'd then fh2o_fill = le_fill /18 /(1.91846*((ta+273.15)/(ta+273.15-33.91)) * ((ta+273.15)/(ta+273.15-33.91)));
29 * DUKE_HARDWOOD calculate fh2o from le and ta 2001-2005 ;
30 if '01jan01'd <=sasdate<= '31dec05'd then fh2o = le /18 /(1.91846*((ta+273.15)/(ta+273.15-33.91)) * ((ta+273.15)/(ta+273.15-33.91)));
31 * DUKE_HARDWOOD calculate nee = fc + sfc for 2003 to 2005 - bai yang 4/4/2011;
32 if '01jan03'd <=sasdate<= '31dec05'd then nee = fc + sfc;


 
Duke Forest Hardwoods, North Carolina, USA
variable stats for L2 data

Site=Duke Forest Hardwoods

Obs Variable MIN MEAN MAX N NMISS TOTAL
1 CO2 200.810 376.260 798.58 130983 9273 140256
2 CO2__2 . . . 0 140256 140256
3 CO2den 10.114 16.003 25.00 48412 91844 140256
4 FC -99.957 -2.042 79.90 131061 9195 140256
5 FC_f 0.000 0.396 1.00 87648 52608 140256
6 FC_fill -68.829 -1.173 41.61 87648 52608 140256
7 FG -38.000 -0.607 45.40 30082 110174 140256
8 FH2O -9.944 1.271 24.89 133036 7220 140256
9 FH2O_fill -2.249 1.189 15.89 87648 52608 140256
10 GEE . . . 0 140256 140256
11 GPP 0.000 4.503 72.82 87648 52608 140256
12 H -299.880 24.542 752.82 134430 5826 140256
13 H2O -4.141 13.769 99.71 132442 7814 140256
14 H2Oden -168.889 569.811 2605.56 49714 90542 140256
15 H_f 0.000 0.324 1.00 87648 52608 140256
16 H_fill -99.991 15.857 595.73 87648 52608 140256
17 LE -299.936 56.351 899.35 132936 7320 140256
18 LE_f 0.000 0.341 1.00 87648 52608 140256
19 LE_fill -99.107 52.364 697.97 87648 52608 140256
20 NEE -99.934 -2.202 79.95 95953 44303 140256
21 NEE_fill -90.966 -1.301 75.28 49539 90717 140256
22 PAR -8.691 340.477 2046.50 140013 243 140256
23 PAR_f 0.000 0.996 1.00 52608 87648 140256
24 PAR_fill -8.691 352.696 2030.00 52608 87648 140256
25 PARdif . . . 0 140256 140256
26 PARout -7.269 50.282 348.41 34082 106174 140256
27 PREC 0.000 0.060 36.10 140256 0 140256
28 PRECcum 0.000 514.227 1345.77 140256 0 140256
29 PRESS 96.800 99.747 102.37 131060 9196 140256
30 RE 0.003 3.331 41.61 87648 52608 140256
31 RH 8.180 68.124 100.00 139333 923 140256
32 RH_f 0.000 0.982 1.00 52608 87648 140256
33 RH_fill 8.800 61.380 100.00 52608 87648 140256
34 Rg -9.217 182.689 1110.00 85760 54496 140256
35 RgOut -4.542 27.823 188.94 85810 54446 140256
36 RgOut_f 0.000 0.983 1.00 52608 87648 140256
37 RgOut_fill -4.542 28.296 181.00 52608 87648 140256
38 Rg_f 0.000 0.983 1.00 52608 87648 140256
39 Rg_fill -5.670 187.139 1110.00 52608 87648 140256
40 Rgdif . . . 0 140256 140256
41 Rgl 135.840 326.078 494.00 85639 54617 140256
42 RglOut 234.700 391.631 602.00 86307 53949 140256
43 RglOut_f 0.000 0.993 1.00 52608 87648 140256
44 RglOut_fill 234.700 392.638 602.00 52608 87648 140256
45 Rgl_f 0.000 0.980 1.00 52608 87648 140256
46 Rgl_fill 159.700 323.830 494.00 52608 87648 140256
47 Rn -194.800 96.055 883.12 140256 0 140256
48 SFC -99.420 -0.067 98.76 101139 39117 140256
49 SFC__2 . . . 0 140256 140256
50 SH -191.163 -0.019 125.05 52608 87648 140256
51 SH__2 . . . 0 140256 140256
52 SLE . . . 0 140256 140256
53 SWC 12.500 32.360 54.00 122688 17568 140256
54 SWC_25 12.500 33.060 54.00 122688 17568 140256
55 SWCdepth 10.000 10.000 10.00 52608 87648 140256
56 SWCdepth_25 25.000 25.000 25.00 52608 87648 140256
57 TA -12.830 15.302 37.70 139387 869 140256
58 TA_f 0.000 0.983 1.00 52608 87648 140256
59 TA_fill -10.400 15.518 37.70 52608 87648 140256
60 TS -4.460 15.509 33.92 105221 35035 140256
61 TS_25 0.005 15.649 29.30 105195 35061 140256
62 TSdepth 10.000 10.000 10.00 140256 0 140256
63 TSdepth_25 25.000 25.000 25.00 140256 0 140256
64 UST 0.003 0.372 9.98 140256 0 140256
65 VPD 0.000 0.638 4.57 139333 923 140256
66 VPD_f 0.000 0.982 1.00 52608 87648 140256
67 VPD_fill 0.010 0.782 4.57 52608 87648 140256
68 WD 0.000 192.782 360.00 138624 1632 140256
69 WD_f 0.000 0.969 1.00 52608 87648 140256
70 WD_fill 0.000 192.787 360.00 51963 88293 140256
71 WS 0.051 2.128 11.17 138624 1632 140256
72 WS_f 0.000 0.969 1.00 52608 87648 140256
73 WS_fill 0.051 2.188 12.20 52608 87648 140256
74 XP 1.404 435.709 7062.30 87648 52608 140256
75 ZEC . . . 0 140256 140256


 
Duke Forest Hardwoods, North Carolina, USA
AmeriFlux L2 variable names and descriptions

Obs name label
1 BIOME BIOME class
2 CO2 CO2 concentration at 39.8m (umol/mol)
3 CO2__2 2nd CO2 concentration at 39.8m (umol/mol)
4 CO2den CO2 density (mmol/m3)
5 Dataname Dataset name
6 Day Day
7 DirName Directory Name
8 Ebalance Energy balance calc [LE+H+FG]/Rn
9 Elevation Elevation (masl)
10 FC CO2 flux at 39.8m (umol/m2/s)
11 FC_f FC flag (1=data,0=gapfilled)
12 FC_fill gap-filled CO2 flux at 39.8m (umol/m2/s)
13 FG Soil heat flux at 5cm (W/m2)
14 FH2O Water vapor flux at 39.8m (mmol/m2/s)
15 FH2O_fill gap-filled calculated Water vapor flux at 39.8m (mmol/m2/s)
16 FluxnetID Fluxnet name
17 GEE Gross ecosystem exchange=daytime [NEE-estRE] negative=sink (umol/m2/s)
18 GMT Greenwich mean time
19 GMT_date GMT date
20 GMT_day GMT day
21 GMT_hour GMT hour
22 GMT_jd GMT Day of year
23 GMT_min GMT minute
24 GMT_month GMT month
25 GMT_year GMT year
26 GPP Gross primary production calculated as =RE-NEE (umol/m2/s)
27 H Sensible heat flux at 39.8m (W/m2)
28 H2O Water vapor concentration (mmol/mol)
29 H2Oden Water vapor density (mmol/m3)
30 H_f H flag (1=data,0=gapfilled)
31 H_fill gap-filled Sensible heat flux at 39.8m (W/m2)
32 Hour Hour
33 IGBP IGBP veg type
34 JD Day of year
35 LE Latent heat flux at 39.8m (W/m2)
36 LE_f LE flag (1=data,0=gapfilled)
37 LE_fill gap-filled Latent heat flux at 39.8m (W/m2)
38 Latitude Latitude (decimal degrees)
39 Longitude Longitude (decimal degrees)
40 MODIS MODIS Land Cover Type 5
41 Minute Minute
42 Month Month
43 NEE Net ecosystem exchange (umol/m2/s)
44 NEE_fill gap-filled Net ecosystem exchange (umol/m2/s)
45 OrigFile Originating filename
46 PAR Incoming photosynthetically active radiation (umol/m2/s)
47 PAR_f PAR flag
48 PAR_fill gap-filled Incoming photosynthetically active radiation (umol/m2/s)
49 PARdif Incoming diffuse PAR (umol/m2/s)
50 PARout Outgoing photosynthetically active radiation (umol/m2/s)
51 PI Principal investigator
52 PIemail PI email
53 PREC Precipitation (mm)
54 PRECcum Precipitation annual cumulative (mm)
55 PRESS Barometric pressure (kPa)
56 RE Ecosystem respiration (umol/m2/s)
57 RH Relative humidity of air (%)
58 RH_f RH flag
59 RH_fill gap-filled Relative humidity of air (%)
60 Rg Incoming global solar radiation (W/m2)
61 RgOut Outgoing global solar radiation (W/m2)
62 RgOut_f RgOut flag
63 RgOut_fill gap-filled Outgoing global solar radiation (W/m2)
64 Rg_f Rg flag
65 Rg_fill gap-filled Incoming global solar radiation (W/m2)
66 Rgdif Incoming diffuse solar radiation (W/m2)
67 Rgl Incoming long wave radiation (W/m2)
68 RglOut Outgoing long wave radiation (W/m2)
69 RglOut_f RglOut flag
70 RglOut_fill gap-filled Outgoing long wave radiation (W/m2)
71 Rgl_f Rgl flag
72 Rgl_fill gap-filled Incoming long wave radiation (W/m2)
73 Rn Net radiation (W/m2)
74 SASDTime DateTime
75 SASDate Date
76 SFC CO2 storage flux at 0-39.8m (umol/m2/s)
77 SFC__2 2nd CO2 storage flux at 0-39.8m (umol/m2/s)
78 SH Sensible heat storage at 0-39.8m (W/m2)
79 SH__2 2nd Sensible heat storage at 0-39.8m (W/m2)
80 SLE Latent heat storage at 0-39.8m (W/m2)
81 SWC Soil moisture volumetric content at 10cm (%)
82 SWC_25 Soil moisture volumetric content at 25cm (%)
83 SWCdepth Soil moisture measurement depth at 10cm (cm)
84 SWCdepth_25 Soil moisture measurement depth at 25cm (cm)
85 Second Second
86 Site Site
87 SiteDesc Site description
88 SiteName Site name
89 TA Air temperature (deg C)
90 TA_f TA flag
91 TA_fill gap-filled Air temperature (deg C)
92 TS Soil temperature at 10cm (deg C)
93 TS_25 Soil temperature at 25cm (deg C)
94 TSdepth Soil temperature depth (cm)
95 TSdepth_25 Soil temperature depth at 25cm (cm)
96 UST Friction velocity (m/s)
97 VPD Vapor pressure deficit (kPa)
98 VPD_f VPD flag
99 VPD_fill gap-filled Vapor pressure deficit (kPa)
100 WD Wind direction (deg)
101 WD_f WD flag
102 WD_fill gap-filled Wind direction (deg)
103 WS Wind speed (m/s)
104 WS_f WS flag
105 WS_fill gap-filled Wind speed (m/s)
106 XP XP Peak of the source weight function (m)
107 Year Year
108 ZEC CO2 height (m)


 
Duke Forest Hardwoods, North Carolina, USA
Ameriflux L2 variables mapped to standardized files variables
with gaps

Obs rec
1 /* filename duke_hardwood.sas */
2 /* Modis name usdukehd */
3 CO2top = co2; * co2 above the canopy; * all missing;
4 CO2height = 39.8; * readme.2003_2005.txt;
5 CO2 = co2; * co2;
6 FC = fc; * fc; * above the canopy;
7 if fc ne . then GAP = 0 ; else gap = -1 ;
8 FG = fg; * fg ;
9 GPP = gpp ;
10 H = h; * h;
11 H2O = h2o; * above the canopy ; *;
12 LE = le; * le;
13 NEE = nee;
14 PAR = par; * par;
15 PARdif = pardif; * ;
16 PARout = parout; * parout;
17 PREC = prec; *prec;
18 PRESS = press; * press ;
19 RE = re ; * re ;
20 RH = rh; * above the canopy;
21 Rg = rg; * rg;
22 RgOut = rgout; * rgout;
23 Rgdif = rgdif; *diffuse radiation;
24 Rgl = rgl; * rgl;
25 RglOut = rglout; * rglout;
26 Rn = rn; * above the canopy;
27 SFC = sfc; * sfc;
28 SH = sh; * sh;
29 SLE = sle; * sle;
30 SWC1 = swc; *;
31 SWC2 = swc_25; * swc at second level;
32 SWCdepth1 = 10;
33 SWCdepth2 = 25;
34 TA = ta; * above the canopy;
35 TS1 = ts; * ts ;
36 TS2 = ts_25; * ts at second level;
37 TSdepth1 = 10;
38 TSdepth2 = 25;
39 UST = ust; * ust;
40 VPD = vpd; * vpd;
41 WD = wd; * above the canopy;
42 WS = ws; * above the canopy;
43 APAR = -6999.; * apar ;
44 APARpct = -6999.; * aparpct ;
45 ZL = -6999.; * zl ;


 
Duke Forest Hardwoods, North Carolina, USA
Ameriflux L2 variables mapped to standardized files variables
gap filled

Obs rec
1 /* filename duke_hardwood_gf.sas */
2 /* Modis name usdukehd_gf */
3 CO2top = co2; * co2 above the canopy; * all missing;
4 CO2height = 39.8; * readme.2003_2005.txt;
5 CO2 = co2; * co2;
6 FC = fc_fill; * fc; * above the canopy;
7 if fc ne . then GAP = 0 ; else gap = -1 ;
8 FG = fg; * fg ;
9 GPP = gpp ;
10 H = h_fill; * h;
11 H2O = h2o; * above the canopy ; *;
12 LE = le_fill; * le;
13 NEE = nee_fill;
14 PAR = par_fill; * par;
15 PARdif = pardif; * ;
16 PARout = parout; * parout;
17 PREC = prec; *prec;
18 PRESS = press; * press ;
19 RE = re ; * re ;
20 RH = rh_fill; * above the canopy;
21 Rg = rg_fill; * rg;
22 RgOut = rgout_fill; * rgout;
23 Rgdif = rgdif; *diffuse radiation;
24 Rgl = rgl_fill; * rgl;
25 RglOut = rglout_fill; * rglout;
26 Rn = rn; * above the canopy;
27 SFC = sfc; * sfc;
28 SH = sh; * sh;
29 SLE = sle; * sle;
30 SWC1 = swc; *;
31 SWC2 = swc_25; * swc at second level;
32 SWCdepth1 = 10;
33 SWCdepth2 = 25;
34 TA = ta_fill; * above the canopy;
35 TS1 = ts; * ts ;
36 TS2 = ts_25; * ts at second level;
37 TSdepth1 = 10;
38 TSdepth2 = 25;
39 UST = ust; * ust;
40 VPD = vpd_fill; * vpd;
41 WD = wd_fill; * above the canopy;
42 WS = ws_fill; * above the canopy;
43 APAR = -6999.; * apar ;
44 APARpct = -6999.; * aparpct ;
45 ZL = -6999.; * zl ;