SAS Output

Twitchell Alfalfa, California, USA

Name value

Principal investigator Dennis Baldocchi

Site name Twitchell Alfalfa, California, USA

IGBP vegetation type Croplands

Latitude 38.1159

Longitude -121.6467

Elevation -9

crdate 29FEB2016

Name	value
Principal investigator	Dennis Baldocchi
Site name	Twitchell Alfalfa, California, USA
IGBP vegetation type	Croplands
Latitude	38.1159
Longitude	-121.6467
Elevation	-9
crdate	29FEB2016

Twitchell Alfalfa, California, USA

input files and their date ranges

Obs OrigFile mindate maxdate nrec

1 AMF_USTW3_2013_L1_GF_V003.csv 05/24/2013 12/31/2013 10656

2 AMF_USTW3_2013_L1_WG_V003.csv 05/24/2013 12/31/2013 10656

3 AMF_USTW3_2014_L1_GF_V003.csv 01/01/2014 12/31/2014 17520

4 AMF_USTW3_2014_L1_WG_V003.csv 01/01/2014 12/31/2014 17520

5 AMF_USTW3_2015_L1_GF_V002.csv 01/01/2015 12/31/2015 17520

6 AMF_USTW3_2015_L1_WG_V002.csv 01/01/2015 12/31/2015 17520

Obs	OrigFile	mindate	maxdate	nrec
1	AMF_USTW3_2013_L1_GF_V003.csv	05/24/2013	12/31/2013	10656
2	AMF_USTW3_2013_L1_WG_V003.csv	05/24/2013	12/31/2013	10656
3	AMF_USTW3_2014_L1_GF_V003.csv	01/01/2014	12/31/2014	17520
4	AMF_USTW3_2014_L1_WG_V003.csv	01/01/2014	12/31/2014	17520
5	AMF_USTW3_2015_L1_GF_V002.csv	01/01/2015	12/31/2015	17520
6	AMF_USTW3_2015_L1_WG_V002.csv	01/01/2015	12/31/2015	17520

Twitchell Alfalfa, California, USA

variable names and original descriptions

VarSource=AMF_USTW3_2013_L1_GF_V003.csv - 2015, USTW3_Metadata.docx

Obs col Variable Origdesc

4 5 FC_fill FC_F umolCO2 m-2 s-1 at 2.7m

5 6 RE_fill RECO umolCO2 m-2 s-1

6 7 GPP_fill GPP umolCO2 m-2 s-1

7 8 FH2O_fill FH2O_F mmolH2O m-2 s-1 at 2.7m

10 11 H_fill H_F W m-2 at 2.7m

11 12 LE_fill LE_F W m-2 at 2.7m

VarSource=AMF_USTW3_2013_L1_WG_V003.csv - 2015, USTW3_Metadata.docx

Obs	col	Variable	Origdesc
4	5	FC_fill	FC_F umolCO2 m-2 s-1 at 2.7m
5	6	RE_fill	RECO umolCO2 m-2 s-1
6	7	GPP_fill	GPP umolCO2 m-2 s-1
7	8	FH2O_fill	FH2O_F mmolH2O m-2 s-1 at 2.7m
10	11	H_fill	H_F W m-2 at 2.7m
11	12	LE_fill	LE_F W m-2 at 2.7m

Obs col Variable Origdesc

41 2 CO2 CO2 umolCO2 mol-1 at 2.7m

42 3 H2O H2O mmolH2O mol-1 at 2.7m

43 4 CH4 CH4 nmolCH4 mol-1 at 2.8m

44 5 FC FC umolCO2 m-2 s-1 at 2.7m

45 6 FCssitc FC_SSITC_TEST, stationarity and ITC according to Foken et al. 2004

46 7 FH2O FH2O mmolH2O m-2 s-1 at 2.7m

47 8 FCH4 FCH4 nmolCO2 m-2 s-1 at 2.8m

48 9 FCH4ssitc FCH4_SSITC_TEST, stationarity and ITC according to Foken et al. 2004

49 10 FG G W m-2 at 3cm

50 11 H H W m-2 at 2.7m

51 12 Hssitc H_SSITC_TEST, stationarity and ITC according to Foken et al. 2004

52 13 LE LE W m-2 at 2.7m

53 14 LEssitc LE_SSITC_TEST, stationarity and ITC according to Foken et al. 2004

54 15 WD WD Decimal degrees at 2.8m

55 16 WS WS m s-1 at 2.8m

56 17 UST USTAR m s-1 at 2.8m

57 18 ZL ZL adimensional

58 19 TAU TAU kg m s-2 at 2.8m

59 20 TAUssitc TAU_SSITC_TEST, stationarity and ITC according to Foken et al. 2004

60 21 L MO_LENGTH m

61 22 Vstd SIGMA_V m s-1

62 23 Wstd SIGMA_W m s-1

63 24 PRESS PA kPa

64 25 RH RH % at 2.6m

65 26 TA TA deg C at 2.6m

66 27 VPD VPD hPa at 2.6m

67 28 DryAirDen AIR_DENSITY_DRY kg m-3

68 29 WetAirDen AIR_DENSITY_MOIST kg m-3

69 30 SWC SWC_10cm %

70 31 SWC_20 SWC_20cm %

71 32 TS TS_2cm deg C

72 33 TS_4 TS_4cm deg C

73 34 TS_8 TS_8cm deg C

74 35 TS_16 TS_16cm deg C

75 36 TS_32 TS_32cm deg C

76 37 Rn NETRAD W m-2 at 1.5m

77 38 PAR PPFD_IN umolPhoton m-2 s-1 at 1.5m

78 39 PARout PPFD_OUT umolPhoton m-2 s-1 at 1.5m

79 40 PARdif PPFD_DIFFUSE umolPhoton m-2 s-1

80 41 Rg SW_IN W m-2 at 1.5m

81 42 RgOut SW_OUT W m-2 at 1.5m

82 43 Rgl LW_IN W m-2 at 1.5m

83 44 RglOut LW_OUT W m-2 at 1.5m

Obs	col	Variable	Origdesc
41	2	CO2	CO2 umolCO2 mol-1 at 2.7m
42	3	H2O	H2O mmolH2O mol-1 at 2.7m
43	4	CH4	CH4 nmolCH4 mol-1 at 2.8m
44	5	FC	FC umolCO2 m-2 s-1 at 2.7m
45	6	FCssitc	FC_SSITC_TEST, stationarity and ITC according to Foken et al. 2004
46	7	FH2O	FH2O mmolH2O m-2 s-1 at 2.7m
47	8	FCH4	FCH4 nmolCO2 m-2 s-1 at 2.8m
48	9	FCH4ssitc	FCH4_SSITC_TEST, stationarity and ITC according to Foken et al. 2004
49	10	FG	G W m-2 at 3cm
50	11	H	H W m-2 at 2.7m
51	12	Hssitc	H_SSITC_TEST, stationarity and ITC according to Foken et al. 2004
52	13	LE	LE W m-2 at 2.7m
53	14	LEssitc	LE_SSITC_TEST, stationarity and ITC according to Foken et al. 2004
54	15	WD	WD Decimal degrees at 2.8m
55	16	WS	WS m s-1 at 2.8m
56	17	UST	USTAR m s-1 at 2.8m
57	18	ZL	ZL adimensional
58	19	TAU	TAU kg m s-2 at 2.8m
59	20	TAUssitc	TAU_SSITC_TEST, stationarity and ITC according to Foken et al. 2004
60	21	L	MO_LENGTH m
61	22	Vstd	SIGMA_V m s-1
62	23	Wstd	SIGMA_W m s-1
63	24	PRESS	PA kPa
64	25	RH	RH % at 2.6m
65	26	TA	TA deg C at 2.6m
66	27	VPD	VPD hPa at 2.6m
67	28	DryAirDen	AIR_DENSITY_DRY kg m-3
68	29	WetAirDen	AIR_DENSITY_MOIST kg m-3
69	30	SWC	SWC_10cm %
70	31	SWC_20	SWC_20cm %
71	32	TS	TS_2cm deg C
72	33	TS_4	TS_4cm deg C
73	34	TS_8	TS_8cm deg C
74	35	TS_16	TS_16cm deg C
75	36	TS_32	TS_32cm deg C
76	37	Rn	NETRAD W m-2 at 1.5m
77	38	PAR	PPFD_IN umolPhoton m-2 s-1 at 1.5m
78	39	PARout	PPFD_OUT umolPhoton m-2 s-1 at 1.5m
79	40	PARdif	PPFD_DIFFUSE umolPhoton m-2 s-1
80	41	Rg	SW_IN W m-2 at 1.5m
81	42	RgOut	SW_OUT W m-2 at 1.5m
82	43	Rgl	LW_IN W m-2 at 1.5m
83	44	RglOut	LW_OUT W m-2 at 1.5m

Twitchell Alfalfa, California, USA

variable edits

Obs Reset

1 * TWITCHELL_ALFALFA reset co2 to missing if 18oct2014 <= sasdate <= 30oct2014, out-of-range values;

2 * TWITCHELL_ALFALFA reset fch4 to missing if fch4 < -200 or fch4 > 300 nmol/m2/s;

3 * TWITCHELL_ALFALFA reset gpp_fill to -gpp_fill, sign convention compliance;

4 * TWITCHELL_ALFALFA reset h to missing if h < -200 or h > 700 W/m2;

5 * TWITCHELL_ALFALFA reset h_fill to missing if h_fill < -200 or h_fill > 700 W/m2;

6 * TWITCHELL_ALFALFA reset l to missing if l < -10000 or l > 10000 m;

7 * TWITCHELL_ALFALFA reset le to missing if le < -200 or le > 800 W/m2;

8 * TWITCHELL_ALFALFA reset le_fill to missing if le_fill < -200 or le_fill > 800 W/m2;

9 * TWITCHELL_ALFALFA reset par to missing if abs(par) > 10 umol/m2/s when solar_elevation < -5 degree;

10 * TWITCHELL_ALFALFA reset par to missing if par < -10 or par > 2500 umol/m2/s;

11 * TWITCHELL_ALFALFA reset par to missing if par < 10 umol/m2/s when solar_elevation > 20 degree;

12 * TWITCHELL_ALFALFA reset parout to missing if abs(parout) > 10 umol/m2/s when solar_elevation < -5 degree;

13 * TWITCHELL_ALFALFA reset parout to missing if parout < -10 or parout > 500 umol/m2/s;

14 * TWITCHELL_ALFALFA reset parout to missing if parout < 10 umol/m2/s when solar_elevation > 20 degree;

15 * TWITCHELL_ALFALFA reset re_fill to missing if re_fill > 15 umol/m2/s;

16 * TWITCHELL_ALFALFA reset rg to missing if abs(rg) > 5 W/m2 when solar_elevation < -5 degree;

17 * TWITCHELL_ALFALFA reset rg to missing if rg < -5 or rg > 1200 W/m2;

18 * TWITCHELL_ALFALFA reset rg to missing if rg < 5 W/m2 when solar_elevation > 20 degree;

19 * TWITCHELL_ALFALFA reset rgout to missing if abs(rgout) > 5 W/m2 when solar_elevation < -5 degree;

20 * TWITCHELL_ALFALFA reset rgout to missing if rgout < -5 or rgout > 500 W/m2;

21 * TWITCHELL_ALFALFA reset rgout to missing if rgout < 5 W/m2 when solar_elevation > 20 degree;

22 * TWITCHELL_ALFALFA reset tau to missing if tau < -2 m2/s2;

23 * TWITCHELL_ALFALFA reset ust to missing if ust > 2 m/s;

24 * TWITCHELL_ALFALFA reset zl to missing if zl < -200 or zl > 200;

Obs	Reset
1	* TWITCHELL_ALFALFA reset co2 to missing if 18oct2014 <= sasdate <= 30oct2014, out-of-range values;
2	* TWITCHELL_ALFALFA reset fch4 to missing if fch4 < -200 or fch4 > 300 nmol/m2/s;
3	* TWITCHELL_ALFALFA reset gpp_fill to -gpp_fill, sign convention compliance;
4	* TWITCHELL_ALFALFA reset h to missing if h < -200 or h > 700 W/m2;
5	* TWITCHELL_ALFALFA reset h_fill to missing if h_fill < -200 or h_fill > 700 W/m2;
6	* TWITCHELL_ALFALFA reset l to missing if l < -10000 or l > 10000 m;
7	* TWITCHELL_ALFALFA reset le to missing if le < -200 or le > 800 W/m2;
8	* TWITCHELL_ALFALFA reset le_fill to missing if le_fill < -200 or le_fill > 800 W/m2;
9	* TWITCHELL_ALFALFA reset par to missing if abs(par) > 10 umol/m2/s when solar_elevation < -5 degree;
10	* TWITCHELL_ALFALFA reset par to missing if par < -10 or par > 2500 umol/m2/s;
11	* TWITCHELL_ALFALFA reset par to missing if par < 10 umol/m2/s when solar_elevation > 20 degree;
12	* TWITCHELL_ALFALFA reset parout to missing if abs(parout) > 10 umol/m2/s when solar_elevation < -5 degree;
13	* TWITCHELL_ALFALFA reset parout to missing if parout < -10 or parout > 500 umol/m2/s;
14	* TWITCHELL_ALFALFA reset parout to missing if parout < 10 umol/m2/s when solar_elevation > 20 degree;
15	* TWITCHELL_ALFALFA reset re_fill to missing if re_fill > 15 umol/m2/s;
16	* TWITCHELL_ALFALFA reset rg to missing if abs(rg) > 5 W/m2 when solar_elevation < -5 degree;
17	* TWITCHELL_ALFALFA reset rg to missing if rg < -5 or rg > 1200 W/m2;
18	* TWITCHELL_ALFALFA reset rg to missing if rg < 5 W/m2 when solar_elevation > 20 degree;
19	* TWITCHELL_ALFALFA reset rgout to missing if abs(rgout) > 5 W/m2 when solar_elevation < -5 degree;
20	* TWITCHELL_ALFALFA reset rgout to missing if rgout < -5 or rgout > 500 W/m2;
21	* TWITCHELL_ALFALFA reset rgout to missing if rgout < 5 W/m2 when solar_elevation > 20 degree;
22	* TWITCHELL_ALFALFA reset tau to missing if tau < -2 m2/s2;
23	* TWITCHELL_ALFALFA reset ust to missing if ust > 2 m/s;
24	* TWITCHELL_ALFALFA reset zl to missing if zl < -200 or zl > 200;

Twitchell Alfalfa, California, USA

number of records reset to missing or other values

Obs variable nreset

1 co2 120

2 fch4 9

3 gpp_fill 45696

4 h 2

5 h_fill 2

6 l 122

7 le 5

8 le_fill 1

9 par 0

10 parout 285

11 re_fill 23

12 rg 277

13 rgout 34

14 tau 1

15 ust 1

16 zl 7

Obs	variable	nreset
1	co2	120
2	fch4	9
3	gpp_fill	45696
4	h	2
5	h_fill	2
6	l	122
7	le	5
8	le_fill	1
9	par	0
10	parout	285
11	re_fill	23
12	rg	277
13	rgout	34
14	tau	1
15	ust	1
16	zl	7

Twitchell Alfalfa, California, USA

variable or unit conversions

Obs cline

1 * TWITCHELL_ALFALFA convert ch4 from nmol/mol to umol/mol;

2 ch4 = ch4/1000;

3 * TWITCHELL_ALFALFA convert dryairden from kg/m3 to mol/m3;

4 dryairden = dryairden / 28.97 *1000.;

5 * TWITCHELL_ALFALFA convert wetairden from kg/m3 to mol/m3;

6 wetairden = wetairden / 28.97 *1000.;

7 * TWITCHELL_ALFALFA convert vpd from hPa to kPa;

8 vpd = vpd/10;

9 * TWITCHELL_ALFALFA convert swc from fraction to percent;

10 swc = swc * 100;

11 * TWITCHELL_ALFALFA convert swc_20 from fraction to percent;

12 swc_20 = swc_20 * 100;

13 * TWITCHELL_ALFALFA convert tau from kg/m/s2 to m2/s2;

14 tau = tau /(wetairden * 28.97/1000);

Obs	cline
1	* TWITCHELL_ALFALFA convert ch4 from nmol/mol to umol/mol;
2	ch4 = ch4/1000;
3	* TWITCHELL_ALFALFA convert dryairden from kg/m3 to mol/m3;
4	dryairden = dryairden / 28.97 *1000.;
5	* TWITCHELL_ALFALFA convert wetairden from kg/m3 to mol/m3;
6	wetairden = wetairden / 28.97 *1000.;
7	* TWITCHELL_ALFALFA convert vpd from hPa to kPa;
8	vpd = vpd/10;
9	* TWITCHELL_ALFALFA convert swc from fraction to percent;
10	swc = swc * 100;
11	* TWITCHELL_ALFALFA convert swc_20 from fraction to percent;
12	swc_20 = swc_20 * 100;
13	* TWITCHELL_ALFALFA convert tau from kg/m/s2 to m2/s2;
14	tau = tau /(wetairden * 28.97/1000);

Twitchell Alfalfa, California, USA

calculated or derived variables

Obs cline

1 * TWITCHELL_ALFALFA calculate NEE, negligible storage term;

2 if (fc ne . ) then nee = fc; else nee = .;

3 * TWITCHELL_ALFALFA calculate NEE_fill, negligible storage term;

4 if (fc_fill ne . ) then nee_fill = fc_fill; else nee_fill = .;

Obs	cline
1	* TWITCHELL_ALFALFA calculate NEE, negligible storage term;
2	if (fc ne . ) then nee = fc; else nee = .;
3	* TWITCHELL_ALFALFA calculate NEE_fill, negligible storage term;
4	if (fc_fill ne . ) then nee_fill = fc_fill; else nee_fill = .;

Twitchell Alfalfa, California, USA

variable statistics for L2 data

Site=Twitchell Alfalfa

Obs Variable MIN MEAN MAX N NMISS TOTAL

1 CH4 1.80 2.298 6.71 6149 39547 45696

2 CO2 314.71 408.016 812.35 38737 6959 45696

3 DryAirDen 37.93 41.704 45.63 45096 600 45696

4 FC -53.67 -2.029 29.57 34751 10945 45696

5 FCH4 -168.36 4.176 294.56 4728 40968 45696

6 FC_fill -53.67 -0.788 28.47 45696 0 45696

7 FG -44.27 2.354 152.89 43161 2535 45696

8 FH2O -4.56 1.781 13.38 38741 6955 45696

9 FH2O_fill -4.56 1.664 13.38 45696 0 45696

10 GPP_fill -22.97 6.260 60.82 45696 0 45696

11 H -159.08 11.477 362.66 43855 1841 45696

12 H2O 2.28 12.689 24.96 38857 6839 45696

13 H_fill -159.08 8.320 362.66 45694 2 45696

14 L -9528.92 34.902 9558.19 43891 1805 45696

15 LE -133.71 78.401 583.15 38740 6956 45696

16 LE_fill -133.71 73.237 583.15 45695 1 45696

17 NEE -53.67 -2.029 29.57 34751 10945 45696

18 NEE_fill -53.67 -0.788 28.47 45696 0 45696

19 PAR -0.22 443.222 2188.89 42848 2848 45696

20 PARdif -0.53 80.973 2040.49 1470 44226 45696

21 PARout -0.21 26.427 250.94 42212 3484 45696

22 PRESS 99.34 101.574 103.41 45096 600 45696

23 RE_fill 0.65 5.465 14.68 45673 23 45696

24 RH 10.34 63.884 98.00 45696 0 45696

25 Rg -4.95 227.251 1078.77 45419 277 45696

26 RgOut -4.93 53.528 271.40 42815 2881 45696

27 Rgl 206.10 313.950 437.02 42846 2850 45696

28 RglOut 269.45 393.173 624.95 42847 2849 45696

29 Rn -123.08 100.535 741.37 42846 2850 45696

30 SWC 3.56 14.663 45.03 43705 1991 45696

31 SWC_20 18.67 30.039 52.34 43705 1991 45696

32 TA -2.64 16.531 40.10 45696 0 45696

33 TAU -1.43 -0.109 0.59 43943 1753 45696

34 TS 1.20 18.020 42.43 43431 2265 45696

35 TS_16 4.27 17.862 29.08 43431 2265 45696

36 TS_32 6.94 17.970 26.31 43431 2265 45696

37 TS_4 1.62 17.942 38.43 43431 2265 45696

38 TS_8 2.40 17.879 34.42 43431 2265 45696

39 UST 0.00 0.277 1.78 44056 1640 45696

40 VPD 0.02 0.899 6.20 45696 0 45696

41 Vstd 0.05 0.688 5.17 44057 1639 45696

42 WD 0.00 235.127 359.99 44057 1639 45696

43 WS 0.02 3.108 12.29 44057 1639 45696

44 WetAirDen 38.39 42.003 45.75 45096 600 45696

45 Wstd 0.01 0.319 1.62 44057 1639 45696

46 ZL -135.48 0.082 189.94 44006 1690 45696

Obs	Variable	MIN	MEAN	MAX	N	NMISS	TOTAL
1	CH4	1.80	2.298	6.71	6149	39547	45696
2	CO2	314.71	408.016	812.35	38737	6959	45696
3	DryAirDen	37.93	41.704	45.63	45096	600	45696
4	FC	-53.67	-2.029	29.57	34751	10945	45696
5	FCH4	-168.36	4.176	294.56	4728	40968	45696
6	FC_fill	-53.67	-0.788	28.47	45696	0	45696
7	FG	-44.27	2.354	152.89	43161	2535	45696
8	FH2O	-4.56	1.781	13.38	38741	6955	45696
9	FH2O_fill	-4.56	1.664	13.38	45696	0	45696
10	GPP_fill	-22.97	6.260	60.82	45696	0	45696
11	H	-159.08	11.477	362.66	43855	1841	45696
12	H2O	2.28	12.689	24.96	38857	6839	45696
13	H_fill	-159.08	8.320	362.66	45694	2	45696
14	L	-9528.92	34.902	9558.19	43891	1805	45696
15	LE	-133.71	78.401	583.15	38740	6956	45696
16	LE_fill	-133.71	73.237	583.15	45695	1	45696
17	NEE	-53.67	-2.029	29.57	34751	10945	45696
18	NEE_fill	-53.67	-0.788	28.47	45696	0	45696
19	PAR	-0.22	443.222	2188.89	42848	2848	45696
20	PARdif	-0.53	80.973	2040.49	1470	44226	45696
21	PARout	-0.21	26.427	250.94	42212	3484	45696
22	PRESS	99.34	101.574	103.41	45096	600	45696
23	RE_fill	0.65	5.465	14.68	45673	23	45696
24	RH	10.34	63.884	98.00	45696	0	45696
25	Rg	-4.95	227.251	1078.77	45419	277	45696
26	RgOut	-4.93	53.528	271.40	42815	2881	45696
27	Rgl	206.10	313.950	437.02	42846	2850	45696
28	RglOut	269.45	393.173	624.95	42847	2849	45696
29	Rn	-123.08	100.535	741.37	42846	2850	45696
30	SWC	3.56	14.663	45.03	43705	1991	45696
31	SWC_20	18.67	30.039	52.34	43705	1991	45696
32	TA	-2.64	16.531	40.10	45696	0	45696
33	TAU	-1.43	-0.109	0.59	43943	1753	45696
34	TS	1.20	18.020	42.43	43431	2265	45696
35	TS_16	4.27	17.862	29.08	43431	2265	45696
36	TS_32	6.94	17.970	26.31	43431	2265	45696
37	TS_4	1.62	17.942	38.43	43431	2265	45696
38	TS_8	2.40	17.879	34.42	43431	2265	45696
39	UST	0.00	0.277	1.78	44056	1640	45696
40	VPD	0.02	0.899	6.20	45696	0	45696
41	Vstd	0.05	0.688	5.17	44057	1639	45696
42	WD	0.00	235.127	359.99	44057	1639	45696
43	WS	0.02	3.108	12.29	44057	1639	45696
44	WetAirDen	38.39	42.003	45.75	45096	600	45696
45	Wstd	0.01	0.319	1.62	44057	1639	45696
46	ZL	-135.48	0.082	189.94	44006	1690	45696

Twitchell Alfalfa, California, USA

AmeriFlux L2 variable names and descriptions

Obs name label

1 BIOME BIOME class

2 CH4 Methane concentration at 2.8m (umol/mol)

3 CO2 CO2 concentration at 2.7m (umol/mol)

4 Dataname Dataset name

5 Day Day

6 DirName Directory Name

7 DryAirDen Dry air density (mol/m3)

8 Ebalance Energy balance [[LE+H+FG]/Rn]

9 Elevation Elevation (masl)

10 FC CO2 flux at 2.7m (umol/m2/s)

11 FCH4 Methane flux at 2.8m (nmol/m2/s)

12 FC_fill gap-filled CO2 flux at 2.7m (umol/m2/s)

13 FG Soil heat flux at 3cm (W/m2)

14 FH2O Water vapor flux at 2.7m (mmol/m2/s)

15 FH2O_fill gap-filled Water vapor flux at 2.7m (mmol/m2/s)

16 FluxnetID Fluxnet name

17 GMT Greenwich mean time

18 GMT_date GMT date

19 GMT_day GMT day

20 GMT_hour GMT hour

21 GMT_jd GMT Day of year

22 GMT_min GMT minute

23 GMT_month GMT month

24 GMT_year GMT year

25 GPP_fill gap-filled Gross primary production [RE-NEE] (umol/m2/s)

26 H Sensible heat flux at 2.7m (W/m2)

27 H2O Water vapor concentration at 2.7m (mmol/mol)

28 H_fill gap-filled Sensible heat flux at 2.7m (W/m2)

29 Hour Hour

30 IGBP IGBP vegetation type

31 JD Day of year

32 L Monin-Obukhov length (m)

33 LE Latent heat flux at 2.7m (W/m2)

34 LE_fill gap-filled Latent heat flux at 2.7m (W/m2)

35 Latitude Latitude (decimal degrees)

36 Longitude Longitude (decimal degrees)

37 MODIS MODIS Land Cover Type 5

38 Minute Minute

39 Month Month

40 NEE Net ecosystem exchange (umol/m2/s)

41 NEE_fill gap-filled Net ecosystem exchange (umol/m2/s)

42 OrigFile Originating filename

43 PAR Incoming photosynthetically active radiation at 1.5m (umol/m2/s)

44 PARdif Incoming diffuse PAR (umol/m2/s)

45 PARout Outgoing photosynthetically active radiation at 1.5m (umol/m2/s)

46 PI Principal investigator

47 PIemail PI email

48 PRESS Barometric pressure (kPa)

49 RE_fill gap-filled Ecosystem respiration (umol/m2/s)

50 RH Relative humidity of air at 2.6m (%)

51 Rg Incoming global solar radiation at 1.5m (W/m2)

52 RgOut Outgoing global solar radiation at 1.5m (W/m2)

53 Rgl Incoming long wave radiation at 1.5m (W/m2)

54 RglOut Outgoing long wave radiation at 1.5m (W/m2)

55 Rn Net radiation at 1.5m (W/m2)

56 SASDTime DateTime

57 SASDate Date

58 SWC Soil moisture volumetric content at 10cm (%)

59 SWC_20 Soil moisture volumetric content at 20cm (%)

60 Site Site

61 SiteDesc Site description

62 SiteName Site name

63 TA Air temperature at 2.6m (deg C)

64 TAU Momentum flux UW at 2.8m (m2/s2)

65 TS Soil temperature at 2 cm (deg C)

66 TS_16 Soil temperature at 16 cm (deg C)

67 TS_32 Soil temperature at 32 cm (deg C)

68 TS_4 Soil temperature at 4 cm (deg C)

69 TS_8 Soil temperature at 8 cm (deg C)

70 UST Friction velocity at 2.8m (m/s)

71 VPD Vapor pressure deficit at 2.6m (kPa)

72 Vstd V std dev (m/s)

73 WD Wind direction at 2.8m (deg)

74 WS Wind speed at 2.8m (m/s)

75 WetAirDen Wet air density (mol/m3)

76 Wstd W std dev (m/s)

77 Year Year

78 ZL Atmospheric stability parameter [[Z - d]/L] (unitless)

Obs	name	label
1	BIOME	BIOME class
2	CH4	Methane concentration at 2.8m (umol/mol)
3	CO2	CO2 concentration at 2.7m (umol/mol)
4	Dataname	Dataset name
5	Day	Day
6	DirName	Directory Name
7	DryAirDen	Dry air density (mol/m3)
8	Ebalance	Energy balance [[LE+H+FG]/Rn]
9	Elevation	Elevation (masl)
10	FC	CO2 flux at 2.7m (umol/m2/s)
11	FCH4	Methane flux at 2.8m (nmol/m2/s)
12	FC_fill	gap-filled CO2 flux at 2.7m (umol/m2/s)
13	FG	Soil heat flux at 3cm (W/m2)
14	FH2O	Water vapor flux at 2.7m (mmol/m2/s)
15	FH2O_fill	gap-filled Water vapor flux at 2.7m (mmol/m2/s)
16	FluxnetID	Fluxnet name
17	GMT	Greenwich mean time
18	GMT_date	GMT date
19	GMT_day	GMT day
20	GMT_hour	GMT hour
21	GMT_jd	GMT Day of year
22	GMT_min	GMT minute
23	GMT_month	GMT month
24	GMT_year	GMT year
25	GPP_fill	gap-filled Gross primary production [RE-NEE] (umol/m2/s)
26	H	Sensible heat flux at 2.7m (W/m2)
27	H2O	Water vapor concentration at 2.7m (mmol/mol)
28	H_fill	gap-filled Sensible heat flux at 2.7m (W/m2)
29	Hour	Hour
30	IGBP	IGBP vegetation type
31	JD	Day of year
32	L	Monin-Obukhov length (m)
33	LE	Latent heat flux at 2.7m (W/m2)
34	LE_fill	gap-filled Latent heat flux at 2.7m (W/m2)
35	Latitude	Latitude (decimal degrees)
36	Longitude	Longitude (decimal degrees)
37	MODIS	MODIS Land Cover Type 5
38	Minute	Minute
39	Month	Month
40	NEE	Net ecosystem exchange (umol/m2/s)
41	NEE_fill	gap-filled Net ecosystem exchange (umol/m2/s)
42	OrigFile	Originating filename
43	PAR	Incoming photosynthetically active radiation at 1.5m (umol/m2/s)
44	PARdif	Incoming diffuse PAR (umol/m2/s)
45	PARout	Outgoing photosynthetically active radiation at 1.5m (umol/m2/s)
46	PI	Principal investigator
47	PIemail	PI email
48	PRESS	Barometric pressure (kPa)
49	RE_fill	gap-filled Ecosystem respiration (umol/m2/s)
50	RH	Relative humidity of air at 2.6m (%)
51	Rg	Incoming global solar radiation at 1.5m (W/m2)
52	RgOut	Outgoing global solar radiation at 1.5m (W/m2)
53	Rgl	Incoming long wave radiation at 1.5m (W/m2)
54	RglOut	Outgoing long wave radiation at 1.5m (W/m2)
55	Rn	Net radiation at 1.5m (W/m2)
56	SASDTime	DateTime
57	SASDate	Date
58	SWC	Soil moisture volumetric content at 10cm (%)
59	SWC_20	Soil moisture volumetric content at 20cm (%)
60	Site	Site
61	SiteDesc	Site description
62	SiteName	Site name
63	TA	Air temperature at 2.6m (deg C)
64	TAU	Momentum flux UW at 2.8m (m2/s2)
65	TS	Soil temperature at 2 cm (deg C)
66	TS_16	Soil temperature at 16 cm (deg C)
67	TS_32	Soil temperature at 32 cm (deg C)
68	TS_4	Soil temperature at 4 cm (deg C)
69	TS_8	Soil temperature at 8 cm (deg C)
70	UST	Friction velocity at 2.8m (m/s)
71	VPD	Vapor pressure deficit at 2.6m (kPa)
72	Vstd	V std dev (m/s)
73	WD	Wind direction at 2.8m (deg)
74	WS	Wind speed at 2.8m (m/s)
75	WetAirDen	Wet air density (mol/m3)
76	Wstd	W std dev (m/s)
77	Year	Year
78	ZL	Atmospheric stability parameter [[Z - d]/L] (unitless)

Twitchell Alfalfa, California, USA

Ameriflux L2 variables mapped into standardized files

with gaps

Obs rec

1 /* filename twitchell_alfalfa.sas */

2 /* Modis name *** */

3 CO2top = co2; * co2 above the canopy;

4 CO2 = co2; * co2;

5 CO2height = 2.7; * co2_top height;

6 FC = fc; * fc above the canopy;

7 if fc ne . then GAP = 0; else GAP = -1;

8 FG = fg; * fg;

9 H = h; * h;

10 H2O = h2o; * h2o above the canopy;

11 LE = le; * le;

12 NEE = nee; * nee;

13 PAR = par; * par above canopy;

14 PARout = parout; * parout above canopy;

15 PARdif = pardif;

16 PREC = -6999.; * prec - not provided;

17 PRESS = press; * press;

18 RH = rh; * rh above the canopy;

19 Rg = rg; * rg above canopy;

20 RgOut = rgout; * rgout above canopy;

21 Rgl = rgl; * rgl above canopy;

22 RglOut = rglout; * rglout above canopy;

23 Rn = rn; * rn above canopy;

24 SFC = 0; * sfc = 0, short canopy;

25 SWC1 = swc; * swc at first depth;

26 SWC2 = swc_20; * swc at second depth;

27 SWCdepth1 = 10.; * first swc depth;

28 SWCdepth2 = 20; * second swc depth;

29 TA = ta; * ta above the canopy;

30 TS1 = ts; * ts at first depth;

31 TS2 = ts_4; * ts at second depth;

32 TSdepth1 = 2; * first ts depth value;

33 TSdepth2 = 4; * second ts depth value;

34 UST = ust; * ust;

35 VPD = vpd; * vpd;

36 WD = wd; * wd above the canopy;

37 WS = ws; * ws above the canopy;

38 ZL = zl;

39 APAR = -6999.; * apar;

40 APARpct = -6999.; * aparpct;

41 GPP = -6999.; * gpp;

42 Rgdif = -6999.; * diffuse radiation;

43 RE = -6999.; * re;

44 SH = -6999.; * sh;

45 SLE = -6999.; * sle;

Obs	rec
1	/* filename twitchell_alfalfa.sas */
2	/* Modis name *** */
3	CO2top = co2; * co2 above the canopy;
4	CO2 = co2; * co2;
5	CO2height = 2.7; * co2_top height;
6	FC = fc; * fc above the canopy;
7	if fc ne . then GAP = 0; else GAP = -1;
8	FG = fg; * fg;
9	H = h; * h;
10	H2O = h2o; * h2o above the canopy;
11	LE = le; * le;
12	NEE = nee; * nee;
13	PAR = par; * par above canopy;
14	PARout = parout; * parout above canopy;
15	PARdif = pardif;
16	PREC = -6999.; * prec - not provided;
17	PRESS = press; * press;
18	RH = rh; * rh above the canopy;
19	Rg = rg; * rg above canopy;
20	RgOut = rgout; * rgout above canopy;
21	Rgl = rgl; * rgl above canopy;
22	RglOut = rglout; * rglout above canopy;
23	Rn = rn; * rn above canopy;
24	SFC = 0; * sfc = 0, short canopy;
25	SWC1 = swc; * swc at first depth;
26	SWC2 = swc_20; * swc at second depth;
27	SWCdepth1 = 10.; * first swc depth;
28	SWCdepth2 = 20; * second swc depth;
29	TA = ta; * ta above the canopy;
30	TS1 = ts; * ts at first depth;
31	TS2 = ts_4; * ts at second depth;
32	TSdepth1 = 2; * first ts depth value;
33	TSdepth2 = 4; * second ts depth value;
34	UST = ust; * ust;
35	VPD = vpd; * vpd;
36	WD = wd; * wd above the canopy;
37	WS = ws; * ws above the canopy;
38	ZL = zl;
39	APAR = -6999.; * apar;
40	APARpct = -6999.; * aparpct;
41	GPP = -6999.; * gpp;
42	Rgdif = -6999.; * diffuse radiation;
43	RE = -6999.; * re;
44	SH = -6999.; * sh;
45	SLE = -6999.; * sle;

Twitchell Alfalfa, California, USA

Ameriflux L2 variables mapped into standardized files

gap filled

Obs rec

1 /* filename twitchell_alfalfa_gf.sas */

2 /* Modis name *** */

3 CO2top = co2; * co2 above the canopy;

4 CO2 = co2; * co2;

5 CO2height = 2.7; * co2_top height;

6 FC = fc_fill; * fc above the canopy;

7 if fc_fill ne . then GAP = 0; else GAP = -1;

8 FG = fg; * fg;

9 GPP = gpp_fill;

10 H = h_fill; * h;

11 H2O = h2o; * h2o above the canopy;

12 LE = le_fill; * le;

13 NEE = nee_fill; * nee;

14 PAR = par; * par above canopy;

15 PARout = parout; * parout above canopy;

16 PARdif = pardif;

17 PREC = -6999.; * prec - not provided;

18 PRESS = press; * press;

19 RE = re_fill; * re;

20 RH = rh; * rh above the canopy;

21 Rg = rg; * rg above canopy;

22 RgOut = rgout; * rgout above canopy;

23 Rgl = rgl; * rgl above canopy;

24 RglOut = rglout; * rglout above canopy;

25 Rn = rn; * rn above canopy;

26 SFC = 0; * sfc negligible, short canopy;

27 SWC1 = swc; * swc at first depth;

28 SWC2 = swc_20; * swc at second depth;

29 SWCdepth1 = 10; * first swc depth;

30 SWCdepth2 = 20; * second swc depth;

31 TA = ta; * ta above the canopy;

32 TS1 = ts; * ts at first depth;

33 TS2 = ts_4; * ts at second depth;

34 TSdepth1 = 2; * first ts depth value;

35 TSdepth2 = 4; * second ts depth value;

36 UST = ust; * ust;

37 VPD = vpd; * vpd;

38 WD = wd; * wd above the canopy;

39 WS = ws; * ws above the canopy;

40 ZL = zl;

41 APAR = -6999.; * apar;

42 APARpct = -6999.; * aparpct;

43 Rgdif = -6999.; * diffuse radiation;

44 SH = -6999.; * sh;

45 SLE = -6999.; * sle;

Obs	rec
1	/* filename twitchell_alfalfa_gf.sas */
2	/* Modis name *** */
3	CO2top = co2; * co2 above the canopy;
4	CO2 = co2; * co2;
5	CO2height = 2.7; * co2_top height;
6	FC = fc_fill; * fc above the canopy;
7	if fc_fill ne . then GAP = 0; else GAP = -1;
8	FG = fg; * fg;
9	GPP = gpp_fill;
10	H = h_fill; * h;
11	H2O = h2o; * h2o above the canopy;
12	LE = le_fill; * le;
13	NEE = nee_fill; * nee;
14	PAR = par; * par above canopy;
15	PARout = parout; * parout above canopy;
16	PARdif = pardif;
17	PREC = -6999.; * prec - not provided;
18	PRESS = press; * press;
19	RE = re_fill; * re;
20	RH = rh; * rh above the canopy;
21	Rg = rg; * rg above canopy;
22	RgOut = rgout; * rgout above canopy;
23	Rgl = rgl; * rgl above canopy;
24	RglOut = rglout; * rglout above canopy;
25	Rn = rn; * rn above canopy;
26	SFC = 0; * sfc negligible, short canopy;
27	SWC1 = swc; * swc at first depth;
28	SWC2 = swc_20; * swc at second depth;
29	SWCdepth1 = 10; * first swc depth;
30	SWCdepth2 = 20; * second swc depth;
31	TA = ta; * ta above the canopy;
32	TS1 = ts; * ts at first depth;
33	TS2 = ts_4; * ts at second depth;
34	TSdepth1 = 2; * first ts depth value;
35	TSdepth2 = 4; * second ts depth value;
36	UST = ust; * ust;
37	VPD = vpd; * vpd;
38	WD = wd; * wd above the canopy;
39	WS = ws; * ws above the canopy;
40	ZL = zl;
41	APAR = -6999.; * apar;
42	APARpct = -6999.; * aparpct;
43	Rgdif = -6999.; * diffuse radiation;
44	SH = -6999.; * sh;
45	SLE = -6999.; * sle;