- 365: leaf area index, Site all, Sat 09-Jun-2007 20:06:33 PDT, leaf area measurements and tower climbing
Performed a final set of leaf area density (actually plant area density)
measurements this evening. Was on the towers for a total time of about
7:30pm till about 8pm.
File 44: East array
File 45: West array
File 46: 30m tower
- 325: leaf area index, Site all, Thu 31-May-2007 19:46:12 PDT, LAI profile
File 41 starts at East tower at 6:02 PM. Ends at 6:22 PM on 5/31/2007.
File 42 starts at West tower at 6:38 PM. Ends at 6:53 PM. Last value
is at 1 m height. That is, it seems I did one level too many coming down the
tower. The problem seems to be that as I descended from 6 m to 5 m, it seemed
that there was a marker missing at 5 m. That is, the next mark below 6 m
seemed to be 2 m lower, so I took a reading between the two marks, thinking thatthe mark at 5 m may have been rubbed out. I still don't know how this could
have happened, but I'm pretty sure that that is where the problem occurred.
On 6/01/07 I returned to the W tower and rechecked the markings on the tower.
There is no marking at the 5 m level; the markings at 4 and 6 m are there. So,
what I did last night seemed to have been the correct strategy. That is, I
interpolated between 4 and 6 m and took a reading at 5 m. So, I am now at a
loss as to where the extra reading occurred. Perhaps the read button was
accidentally pushed while traversing the tower.
File 43 starts at N tower at 7:11 PM. Ends at 7:34 PM.
Sonic at 6 m level has more blockage than sonic at 7.5 m. The sonic at
7.5 m is almost free of the canopy for a considerable distance upwind.
There's some branches to the S, but for a S wind, the flow does not have
a lot of restriction. In contrast, at 7.5 m, there's blockage a meter or
so upwind by branches.
Don Lenschow
- 317: leaf area index, Site all, Wed 30-May-2007 11:44:01 PDT, demo
Files 39 and 40 were used to provide a demo for Don so the data is not useable.
- 261: leaf area index, Site all, Fri 18-May-2007 19:58:09 PDT, leaf area measurements
Took leaf area density measurements this evening 7:00-7:40pm LT
Data remains in the data logger.
File 35: bad data (remembering how to work the system)
File 36: east leg of east array
File 37: west leg of west array
File 38: 30m tower
All profiles were taken on the north side of the towers.
Occasional measurements locations on the east and west side
of the array were obstructed by leaves (i.e. leaves completely
covering the sensor). In this case, I used my other hand to
move the branch away so that those leaves were not covering
the sensor.
- 168: leaf area index, Site horizontal array, Thu 19-Apr-2007 15:24:16 MDT, Walnut Tree Characteristics South of the Horiz Array
---- CHATS TREE Measurements on 9 April 2007 ----
Measurement Location: South of the CHATS horizontal array.
Measurements by: Jielun Sun (jsun@ucar.edu)
Data File Created by: Sean Burns (sean@ucar.edu)
NOTES:
1. "Tree ID" refers to the NS and EW row of the tree
2. Tree S1 E0 is the tree one row south and in the center of the "wide" array
3. "Lower bole" refers to the root stock of the tree (there is an obvious change
in tree diamter above and below the graft)
4. These are walnut trees (with Black Walnut (?) root stock and Chandler Walnut grafted above)
5. "Ht to Lowest Branch" is from the ground to the lowest major branch
6. Example tree photos:
S1 E0 = http://www.mmm.ucar.edu/abl/chats/photos_spb/tree_s1_e0.jpg
S1 (looking EAST) = http://www.mmm.ucar.edu/abl/chats/photos_spb/tree_row_s1.jpg
7. All units are in centimeters
LOWER BOLE:
Tree ID DBH DIA Height Ht to Lowest Branch
------- ----- ---- ------ --------------------
S1 W5 46 127 46 97
S1 W4 28 114 28 78
S1 W3 60 135 60 98
S1 W2 22 151 22 92
S1 W1 54 110 54 84
S1 E0 22 106 22 74
S1 E1 66 118 66 90
S1 E2 32 115 32 93
S1 E3 76 122 76 101
S1 E4 32 125 32 67
S1 E5 60 140 60 107
S1 E6 26 110 26 78
S2 W5 27 112 27 85
S2 W4 65 114 65 85
S2 W3 37 100 37 90
S2 W2 60 114 60 82
S2 W1 15 115 15 82
S2 E0 56 109 56 82
S2 E1 32 107 32 85
S2 E2 52 111 52 84
S2 E3 29 96 29 70
S2 E4 65 108 65 74
S2 E5 40 138 40 72
S3 W5 50 113 50 86
S3 W4 23 115 23 82
S3 W3 58 109 58 76
S3 W2 26 124 26 71
S3 W1 40 107 40 76
S3 E0 34 111 34 79
S3 E1 60 117 60 85
S3 E2 13 111 13 82
S3 E3 49 137 49 101
S3 E4 22 108 22 78
S3 E5 49 118 49 90
S4 W5 31 97 31 71
S4 W4 62 118 62 86
S4 W3 27 113 27 72
S4 W2 66 121 66 88
S4 W1 31 115 31 79
S4 E0 74 127 74 97
S4 E1 31 87 31 66
S4 E2 60 122 60 90
S4 E3 22 100 22 72
S4 E4 14 113 14 85
S4 E5 40 110 40 85
S5 W5 70 141 70 106
S5 W4 20 106 20 51
S5 W3 60 121 60 85
S5 W2 35 171 35 100
S5 W1 62 86 62 64
S5 E0 33 140 33 91
S5 E1 72 125 72 86
S5 E2 30 100 30 58
S5 E3 56 129 56 89
S5 E4 9 132 9 96
S5 E5 63 110 63 79
------- ----- ---- ------ --------------------
MEAN = 42.8 117.0 42.8 83.1 (56 trees)
STD = 18.4 15.0 18.4 11.4 (56 trees)
- 91: leaf area index, Site all, Mon 02-Apr-2007 18:53:31 PDT, LAI profiles
[numbers correspond to file numbers in LAI instrument]
4/2/07
Keith made LAI profile measurements from ~17:45 - 18:45 at 12 heights from
0 to 11 m:
16: vertical tower
17: east tower of horizontal array
18: west tower of horizontal array
All measurements made pointing sensor to the north
4/4/07
Keith repeated the LAI measurements from ~8:30 - 9:00 PDT. Sun was partly
obscured by thin, high cirrus.
19: west tower
20: east tower
21: 30 m tower (north)
4/5/07
Keith (with Don looking) made LAI measurements from 0730-0800.
Sky 8/10 obscured by cirrus and altostratus
22: west tower
23: east tower
24: north
4/6/07
LAI measurements started 0737-0808 (with a small break between east and north
while Steve was working on the p' port).
Sky clear (0 clouds; 6 balloons)
25: west tower 0737-
26: east -~0800
27: north 0808-0818
4/9/07
LAI measurements started 0727-0756. Sky clear.
28: west tower 0727-
29: east -~0738
30: north 0748-0756
4/11/07
LAI measurements started 0755-0803. Sky 80-85% cloudy. Ended early due to
rain.
31: west tower
4/12/07
LAI measurements 0823-0922. Sky clear. Took longer since first time for
Sean and SteveO to do this. Also had to re-measure upper heights on east
(perhaps washed off in rain??)
32: north [Steve], 8:23-8:35
33: east [Steve], 8:48-8:57
34: west [Sean], 9:02-9:22
- 81: leaf area index, Site base, Sun 01-Apr-2007 16:12:35 PDT, LAI sensor demo
File 15 is not good data; it was used for demo by Ned
- 53: leaf area index, Site all, Sun 25-Mar-2007 11:32:50 PDT, leaf area density profiles
Took out the LAI-2000 yesterday (3/24).
Drove the Cherry Picker south-ease down the angled road from
the yard until it turns east. I went south four trees.
First measurement is contained in file #6 on the logger. I did not
have a measuring tape at this time.
I then drove the cherry picker over to the 30m tower. At the tall
tower, I took three measurement profiles. Two were one tree north
of the tower and the last was three trees south of the tower.
The measurements were taken such that the LAI-2000 probe was located
at the top of the booms that hold the TRH sensors. These profiles
are contained in files #7, #8 and #9. In taking these measurements, I
had the sensor 90deg blocked (270deg open) to block me out of the
measurement. The highest measurement was at the 9m height because
the cherry picker would only go that high.
Returned this morning (3/25) to improve on the profiles taken yesterday.
These profiles were now taken from the eastern-most and western-most
towers of the horizontal array. I used the 180deg blocker for these
measurements to block both myself and the towers from the sensor.
The highest measurement for these profiles was 11m. I then took a
measurement every meter as I descended the tower. So there are now
twelve measurements per profile (from 11 -> 0 m). The good measurements
are contained in Files #13 (east, pointed south) and #14 (west, pointed
north).
I had to stop taking measurements because the sun came out. However,
in the future, I recommend another profile be take from the 30m tower.
I also recommend staying with this structure of once per meter.
To take the measurements:
1) power on by pressing: 'Power'
2) start logging data by pressing: 'Log'
3) press 'Enter' twice to take the entries as they are.
4) start at 11 m, point and level the sensor, press and let
go of the button on the wand. you'll hear a beep that
starts the measurement, followed by a beep that the
measurement is complete.
5) move down 1 m. repeat.
6) last measurement is with the sensor sitting on the ground.
7) the logger will store the info. Will offload later.
If you change the number of levels in the profile, you need to modify
the stored program.
Ned
- 48: leaf area index, Site all, Sat 24-Mar-2007 15:19:01 PDT, tree observations
Ned asked me to enter that he first saw buds last Sunday, March 18, and first
saw leaves on Thursday, March 22.