17:00 Mar 4 Sage
Near B.
Fresh(4 Mar) Dry(5 Mar) %(wet/total)
A sample taken 16:00 which broke, but I recovered some:
0-~5 80.3 56.9 29.1
56.9 49.7 12.7
The real sample:
0-3 cm EI 28.0 18.4 34.3
EII 30.0 19.8 34.0
EIII 28.7 19.8 31.0
Mean: 33.1
Total sample: 88.6 [59.3]
Density: [0.86]
3-8 cm FI 52.8 44.1 16.5
FII 54.0 44.5 17.6
FIII 48.8 38.4 21.3
Mean: 18.5
Total sample: 179.3 [146.1]
Density: [1.28]
12:45 Mar 4 Lake
Close to B!
Dug down through 28 cm of snow - broke up ice coating surface
Fresh(4 Mar) Dry(5 Mar)
(has some ice/snow on the top, but mostly solid frozen)
0-3 cm AI 38.0 28.5 25.0
AII 35.9 27.3 24.0
AIII 23.3 17.8 23.6
Mean: 24.2
Total sample: 99.8 [75.6]
Density [1.10]
(peaty: root and stem)
3-8 cm BI 19.3 14.7 23.8
BII 15.7 11.3 28.0
BIII 16.0 11.2 30.0
Mean: 27.3
Total sample: 87.8 [63.8]
Density: [0.56]
15:00 Mar 5 Grass site:
Close to B:
Dug down through 28 cm of snow - broke up ice coating surface
Fresh(5 Mar) Dry(6 Mar)
(has some ice/snow on the top, but mostly solid frozen)
0-3 cm CI 18.3 4.4 76.0
CII 10.9 3.1 71.6
CIII 12.9 2.9 77.5
Mean: [75.0]
Total sample: 42.9 [10.7]
Density 0.62 0.16
(peaty: root and stem)
3-8 cm DI 28.3 22.1 21.9
DII 19.8 13.1 33.8
DIII 29.4 24.0 18.4
Mean: [24.7]
Total sample: 111.2 [83.7]
Density: 0.97 0.73
17:00 Mar 5 Lake site:
Close to C:
Fresh(5 Mar) Dry(
(has some ice/snow on the top, but mostly solid frozen)
0-3 cm EI 32.8 23.5 28.4 [had a grub inside!]
EII 26.9 19.7 26.8
EIII 28.4 20.6 27.5
Mean: [27.5]
Total sample: 92.5 [67.1]
Density 1.35 0.98
(peaty: root and stem)
3-8 cm FI 39.4 24.7 37.3
FII 44.8 32.3 27.9
FIII 39.8 22.7 43.0
Mean: [36.1]
Total sample: 157.9 [100.9]
Density: 1.38 0.88
09:30 Mar 6 Grass site:
Close to A:
Fresh(6 Mar) Dry(7 Mar)
(has some ice/snow on the top, but mostly solid frozen)
0-3 cm AI 14.5 1.6 89.0
AII 10.6 1.0 90.6
AIII 11.1 1.1 90.1
89.8
Mean:
Total sample: 37.0 3.8 (but not complete volume)
Density 0.54 0.06
(peaty: root and stem)
3-8 cm BI 22.2 9.8 55.9
BII 16.5 7.5 54.5
BIII 17.9 4.6 74.3
Mean: 61.3
Total sample: 87.8 34.0
Density: 0.77 0.30
13:00 Mar 6 Sage site:
Close to A:
I took two cores that broke (along with the corer), so I only recovered about
6cm deep cores twice.
Fresh(6 Mar) Dry(7 Mar)
0-~6 cm EI 44.2 34.3 22.4
EII 34.5 27.3 20.9
EIII 42.4 34.0 19.8
Mean: 21.1
Total sample: 138.7 109.4 (very crude estimate)
Density 1.01 0.80
0-~6 cm FI 42.8 34.5 19.4
FII 37.7 31.4 16.7
FIII 39.4 31.8 19.3
Mean: 18.5
Total sample: 168.1 137.0 (very crude estimate)
Density: 1.22 1.00
[] values are calculated from other variables
Diameter of corer is 5.4cm
At Lake site at 15:00- 16:00. Level with the middle soil installations, 6 - 7m
north of the center of the radiometer stand.
Cleared the 15 cm snow for a 1m diameter circle.
There was an ice crust a cm or so thick. This was broken up and discarded.
Then carefully excluding
loose snow dug a 20 cm wide, 35 cm deep pit using a digging bar. The loose dirt
was sccoped out by hand and thrown to the north, away from the rad stand.
Using trowel took samples of 0-5cm,5-10cm,10-15cm,15-20cm,20-25cm,and 25-30 cm
Returned to base and weighed aliquots
Into oven 16:40 on 24 Feb''03
Out of oven for weighing 09:00 on 26 Feb''03
Aliquots Fresh Dry Different Gravmoist
0-5cm A I 33.4 25.4 8.0 0.315
A II 36.1 27.5 8.6 0.313 30.4%
AIII 30.6 23.8 6.8 0.286
5-10cm BI 28.4 23.7 4.7 0.198
BII 26.5 22.2 4.3 0.194 20.1%
BIII 27.5 22.7 4.8 0.211
10-15cm CI 26.4 23.0 3.4 0.148
CII 29.1 25.4 3.7 0.146 14.9%
CIII 25.8 22.4 3.4 0.152
15-20cm DI 24.0 20.7 3.3 0.159
DII 23.0 19.7 3.3 0.168 16.4%
DIII 22.0 18.9 3.1 0.164
20-25cm EI 28.3 23.8 4.5 0.189
EII 26.2 22.0 4.2 0.191 18.9%
EIII 24.1 20.3 3.8 0.187
25-30cm FI 30.6 25.1 5.5 0.219
FII 24.7 20.3 4.4 0.217 21.8%
FIII 24.1 19.8 4.3 0.217
There is a minimum soil moisture at ~ 15 cm. Note that below this depth the soil
changes from "sandy" to "clayey".
From 1300-1400 added regulators to the switched 12V signals from the CR10s at all 3 sites (grass, then sage, then lake). I'm not sure about some of the electrical contacts -- the daily plots show that I did make a change -- hopefully, it was for the good!
To investigate the soil moisture down to the 35 cm depth, a pit was dug at the
Sage site. The pit was 5m or so south of the Darkhorse. near the fence.
It was in a small clear patch with 20-30cm sage bushes some 20-30 cm away.
Several cm of snow was brushed away and with digging bars the ground was broken
to a depth, then the loose dirt collected.
Samples were collected for:
0 - 6 cm
6 - 10 cm
10 - 15 cm
15 - 20 cm
20 - 25 cm
30 - 35 cm
Triplicate aliquots were separated and introduced into the oven at 12:00
The dried aliquots were removed and weighed the next day at 09:45.
Note that the ordering of the aliquots C, B, A, D, E, F is correct
Sample Aliquot Fresh Dry Difference Gravmoist
g g g
0 - 6 cm C I 22.7 19.0 3.7 0.195
C II 27.5 23.4 4.1 0.175 18.7%
C III 25.6 21.5 4.1 0.191
6 - 10 cm B I 21.8 19.0 2.8 0.147
B II 18.2 15.8 2.4 0.152 15.0%
B III 24.3 21.1 3.2
10 - 15 cm A I 24.5 21.5 3.0 0.140
A II 23.0 20.3 2.7 0.152 13.6%
A III 20.9 18.4 2.5 0.152
15 - 20 cm D I 28.0 24.7 3.3 0.134
D II 25.5 22.5 3.0 0.133 13.2%
D III 26.1 23.1 3.0 0.130
20 - 25 cm E I 21.3 19.0 2.3 0.121
E II 24.0 21.3 2.7 0.127 12.7%
E III 24.7 22.0 2.7 0.123
30 - 35 cm F I 19.9 17.9 2.0 0.112
F II 26.2 23.6 2.6 0.110 11.2%
F III 25.7 23.1 2.6 0.113
7/28/03 we examined the soil problems noted in the 'todo' list. SAGE: Very little snow on ground, mostly bare with patches of snow. gsoil.c.10cm yes indeed the cable was spliced and it appears dicey to try to fix it where it enters the frozen ground. Tsoil.a.2.5cm appeared ok and not disturbed even though someone said it looks 'wierd' took pictures. LAKE: crusted snow cover all over. Perhaps 4-8" deep. Gsoil.c.10cm has a wiring break and we were supposed to resolder it. We played a bit trying to pull out the cable to find the 'tape job' but decided we were impacting the surface and jeopardizing the other sensors so stopped. Qsiol.c.10cm ditto. Logger connections are secure and look good.
7/28/03 ~1pm TP01 should now be up. We haven't seen a pulse on the Vheat yet but it's still set to 3-hour cycling and we didn't change that. Checked wiring after examining sage site which is working. CR10 wiring OK. I did note the C7 - Switched 12 goes to the access point 2 positions away instead of the access across the terminal blocks adjacent to the +12 input. Amp-9 connector from probe was bad. It could never have worked and apparently wasn't checked in Boulder before coming up here. Pin 2 (gnd) was crimped with the insulation preventing contact. Pin 1/4 were in wrong positions. Pin 8 with 150 ohm connector had and has a tenuous solder to the wire. We probably broke off when unscrewing the backshell. Wiring correct now. NOTE: the 150ohm connection needs to be redone so it's more secure.
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Graphic: 
To view the configuration of the soil sensors at Grass, Sage and Lake: Hit "Graphics Viewer", and then the little diamond.
- 116: Soil, Site all stns, Wed 22-Jan-2003 12:57:12 MST, TP01 wiring
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Graphic: 
The graphics file shows the wiring ofr the TP01 probe. The color code for the wires corrresponds to the probe wires and NOT the wires in the logger box.
- 101: Soil, Site all stns, Tue 07-Jan-2003 13:40:58 MST, testing of thermal properties probes
At sage, 11:59 am, Jan 7, set the thermal properties cycle to 10 minutes (from 180 minutes) so that Steve/Cody could check the voltages. At 12:05, did the same at lake. Steve determined at sage that the variation seen on Vheat is due to the charging system. At 1:30 pm, changed sage back to 180 minute cycle. At 1:32, changed lake back. At 1:37pm, changed grass to 10 minutes. At 3:51pm, changed grass back to 180 minutes. The TP instructions are numbers 68 and 72 The values for normal 3 hour cycling are: MODE 01:0000 68\r\n 68:P92 \r\n 01:0000 \r\n 02:0180 \r\n 03:30 \r\n \r\n MODE 01:0000 72\r\n 72:P92 \r\n 01:0003 \r\n 02:0180 10\r\n 03:30 \r\n \r\n For 10 minute cycling, change the second parameter from 180 to 10.
- 84: Soil, Site lake, Thu 19-Dec-2002 11:56:01 MST, Corrected therm prop. timing at lake
The logger at lake was looping through the thermal properties code every 3 minutes, instead of every 3 hours. The code was changed to 3 hour looping at 11:30am, Dec 19
- 80: Soil, Site all stns, Wed 18-Dec-2002 14:13:04 MST, Soil gravimetric/bulk density
The Sage, Lake and Grass C soil samples were not treated the same as were the A and B. Rather, the cores were extracted in toto and will be used for bulk density determination. Because of the limitation of the balance the cores were broken in two. The core portions were put into larger Al container, were weighed and then left to dry until the next visit. In all cases the ~20 cm of snow was removed and the ice crust atop the soil surface was broken and removed. At Grass dead grass stalks were also removed. Sage C Tare Fresh(18 Dec) Dry(1/7/03) 0 - 8cm ZI 8.0 143.2 122.0 ZII 8.0 149.0 115.2 Lake C Tare Fresh(18 Dec) Dry(1/7/03) 0 - 8 cm ZIII 8.0 120.5 87.0 ZIV 8.0 168.8 127.2 Grass C Tare Fresh(18 Dec) Dry(1/7/03) 0 - 8 cm ZV 8.0 76.2 top 4 cm peaty 34.3 ZVI 8.0 136.1 bottom 4 cm 106.4- 70: Soil, Site all stns, Tue 17-Dec-2002 16:21:07 MST, Gravimetric soil samples
Weighed the soil samples collected on Mon 16 Dec (see log entry 67) 11:40 Sage site. .At B, dug away 10 cm of snow. There was a 2 -3 cm ice crust on the soil surface. Very hard going to sink the core as the ground was frozen. Although the snow was completely removed from the surface before coring the ice incorporated in the soil melted in the base to yield mud. The corer stem broke and had to be replaced with a pice of pipe. Fresh Dry (18 Dec) 0-3 cm AI 25.3 17.6 AII 20.9 14.7 AIII 21.9 16.1 3-8 cm BI 26.1 21.6 BII 22.6 18.8 BIII 22.3 18.8 13:30 Lake site At B dug down through 30 cm of snow and brushed soil surface clear of snow Fresh Dry (18 Dec) 0-3 cm CI 13.3 11.5 CII 16.6 14.4 CIII 14.6 12.5 3-8 cm DI 13.9 11.3 DII 15.7 12.7 DIII 19.1 15.3 14:00 Grass site. At B 25 - 30 cm of snow. Dug down and then broke up crust incorporating dead grass stems and ice. Cleaned this away and started core at peaty surface. Fresh Dry (18 Dec) 0-3 cm EI 8.2 2.5 EII 7.4 2.4 EIII 6.7 2.4 3-8 cm FI 15.9 12.3 FII 17.3 12.7 FIII 19.7 15.3- 67: Soil, Site all stns, Mon 16-Dec-2002 17:55:08 MST, Gravimetric soil samples
Gravimetric soil samples are to be: top 3 cm next 5 cm The plan is to do Sage A, Lake A and Grass A on Mon, 16 Dec, dry overnight ......................B.......B B Tue 17.................. .......................C ......C.......... C....Wed..18 leave in oven Also to take total cores from three sites for bulk density and leave in oven 11:20 Sage site. Approx 10 cm of snow between bushes with almost no snow under some bushes.At A, under a bush with no snow cover, core sample. Fresh Dry (17 Dec) 0-3 cm AI 16.6 11.7 AII 12.4 8.5 AIII 13.1 8.8 3-8 cm BI 22.7 20.6 BII 23.7 21.6 BIII 24.2 21.9 12:00 Lake site Fairly uniform 20 -25 cm snow. Couldnt locate A so went approx the correct distance from box. Dug down through snow to soil and brushed the surface clear. Fresh Dry (17 Dec) 0-3 cm CI 15.6 11.0 CII 14.5 10.4 CIII 17.1 12.5 3-8 cm DI 23.4 21.5 DII 25.8 23.8 DIII 25.4 23.2 12:40 Grass site. Grass sticking out of 0-8 cm snow. Note that the top 1 cm was grass stalks. I discarded this and separated the dirtr component from the next 3 cm. The lower 5 cm was mostly dirt. Fresh Dry (17 Dec) 0-3 cm EI 5.5 2.9 EII 4.6 2.4 EIII 5.0 2.7 3-8 cm FI 9.5 6.8 FII 11.3 8.3 FIII 12.7 9.2- 61: Soil, Site lake, Mon 16-Dec-2002 17:40:33 MST, TP01 installed
TP01 SN 200235 installed at lake site ~1645. It is installed about at 5cm in the frozen sand. It still has an air gap, though somewhat neater (and thus smaller) than at the tower site -- I'm learning.
- 60: Soil, Site tower, Mon 16-Dec-2002 17:34:16 MST, TP01 installed
TP01 SN 200234 installed at tower site ~1345. (It was connected an hour earlier, but it was on top of the snow.) It is installed about at 5cm in the (peat-like) dirt. I'm sure that there is an air-gap beside it, but hopefully this will heal with time.
- 54: Soil, Site lake, Thu 12-Dec-2002 16:46:33 MST, Changed Tsoil sampling at sage,lake
Dec 12, 16:45 MST As in logbook entry #51 at the grass site, changed the CR10x logger code at lake and sage so that there is a 10 msec delay before sampling the Tsoil probes.
- 51: Soil, Site tower, Wed 11-Dec-2002 10:27:54 MST, Modifed grass logger Tsoil sampling
Dec 11, 10:27 MST: Added 10 millisecond delay to P11 instruction (#50) which is used to sample T107 Tsoil probes. This is the 03 parameter, which we changed from 1 to 21. Lab testing showed that this reduces noise, and so we hope this will reduce the noise on Tsoil that we see when the radiometer fans are on. This changed reduced the noise significantly, except on the 10cm probes, which are sampled at another point in the CR10 code. Dec 11, 15:13 MST Changed the P11 instruction for the 10cm probes too (instruction 60). Here is the rserial output: MODE 01:0000 60\r\n 60:P11 \r\n 01:01 \r\n 02:05 \r\n 03:01 \r\n 04:0027--\r\n 05:+1.0000 \r\n 06:+0.0000 \r\n MODE 01:0000 60\r\n 60:P11 \r\n 01:01 \r\n 02:05 \r\n 03:01 21\r\n 04:0027--\r\n 05:+1.0000 \r\n MODE 01:0000 60\r\n 60:P11 \r\n 01:01 \r\n 02:05 \r\n 03:21 \r\n 04:0027--\r\n 05:+1.0000 \r\n 06:+0.0000 \0x7f\r\n Oops: looks like I didn't restart the logger with a "*0" and it didn't resume until I rserial'd to it again at about 16:20.
- 46: Soil, Site tower, Mon 09-Dec-2002 09:09:34 MST, soil profile array cable installed
the soil profile array interface cable was installed on Wed, Dec 4th we are now receiving data
- 7: Soil, Site all stns, Mon 14-Oct-2002 10:02:32 MDT, FLOSS02 soil sensors
On Thurs, 10 Oct''02 Tony and John visited the FLOSS site The Echo soil sensors at Sage, Lake and Grass were reinstalled. They had been installed horizontally the previous week and had been watered to help them meld into the soil. This melding was apparently sucessful at Sage and Lake, where the soil was suitable, but not so sucessful at Grass, where the soil was actually peat. The Echo probes were reinstalled vertically, with their midlines at the designated depths of 5 cm and 10 cm. They were positions at right angles to each other with ~12cm between their cabled ends. Sage A 1 @ 5cm A 2 @ 10cm Sage B 3 @ 5cm B 4 @ 10cm Sage C 5 @ 5cm C 6 @ 10cm Each set of Echo probes waterd with 1 gallon Lake A 1 @ 5cm A 2 @ 10cm Lake B 3 @ 5cm B 4 @ 10cm Lake C 5 @ 5cm C 6 @ 10cm Each set of Echo probes watered with 1 gallon Grass A 1 @ 5cm (It is possible that A1 is actually at 10cm) A 2 @ 10cm (It is possible that A2 is actually at 5cm) Grass B 3 @ 5cm B 4 @ 10cm Grass C 5 @ 5cm C 6 @ 10cm Each set of Echo probes watered with 2 gallons- 4: Soil, Site lake, Fri 11-Oct-2002 14:51:44 MDT, Hft Probes 1,2 upside down
10/10/02 The sensors apparently didn't have the white dot and were installed up-side down. This is very apparent in the data. Fix: can either be swap wires in logger, or change sign of logger coef.
- 3: Soil, Site all stns, Fri 11-Oct-2002 14:48:08 MDT, Soil Echo Probes Rotated to Vertical
10/10/02 Soil Echo Probes Rotated: from Horizontal to Vertical orientation at Sage/Lake/Grass. Water was dumped on to help bed the sensors in. Tony said they already were looking good in that respect. The logger cable was added to the Lake site. Both Sage/Lake are now reporting data through goes.
- 1: Soil, Site all stns, Tue 08-Oct-2002 08:48:09 MDT, Installation of soil sensors
On 2 Oct''02 the locations for the soil sensors for Grass, Sage and Lake soil sensor arrays were chosen by Tony, Steve O and Jielun. Tony installed the sensors at Grass and Sge on 2 Oct and installed the sensors at Lake on the 3 Oct. After installation the sensors were wetted down with approximately 6 liters of water to "bed them in". It is anticipated that given another month of warm weather the local soil moisture will come to equilibrium before the start of the program in December. For the schematic of the placement see