Table 2.3. Temperature and underwater irradiance, Lawrence Lake, Barry County, Michigan.
April 9, 1974
April 23, 1974
May 7,1974
May 21, 1974
Inc.
Refl.
Inc.
Refl.
Inc.
Refl.
Inc.
Refl.
Depth
light
light
light
light
light
light
light
light
(m)
°C
(%)
(%)
°C
(%)
(%)
°C
(%)
(%)
C
(%)
(%)
0
4.9
100
100
10.9
100
100
12.2
100
100
16.9
100
100
0.1
43.2
87.5
65.6
70.0
52.7
16.6
52.3
11.3
1
4.9
28.2
75.0
10.9
32.2
65.6
12.1
35.2
12.1
16.9
31.4
9.4
2
4.9
16.8
42.0
10.8
25.6
56.1
12.0
20.9
9.3
15.2
22.1
7.1
3
4.9
10.5
31.0
10.8
18.9
43.9
11.9
15.4
5.9
13.1
18.4
4.8
4
4.9
6.6
20.5
10.8
13.3
32.2
11.8
13.6
3.8
12.7
13.5
3.5
5
4.9
3.5
13.5
10.7
8.9
22.2
11.1
10.1
2.4
12.2
9.8
2.3
6
4.9
2.6
8.8
9.4
6.1
13.3
9.8
7.3
1.8
12.0
6.5
1.8
7
4.9
1.8
5.0
7.8
4.4
7.8
8.7
4.5
1.4
10.5
5.1
1.2
8
4.9
1.2
3.0
6.9
3.2
5.0
7.4
3.0
1.0
8.3
3.4
0.9
9
4.9
0.8
2.0
6.1
2.3
3.3
6.3
2.1
0.7
7.1
2.4
0.7
10
4.9
0.5
1.3
5.2
1.6
2.8
5.7
1.4
0.6
6.2
1.7
0.6
11
4.9
0.3
0.8
4.9
1.1
2.2
5.1
1.2
0.5
5.8
1.3
0.6
12
4.8
0.2
0.3
4.8
0.7
1.7
5.0
1.0
0.5
5.5
1.0
0.6
12.5
4.8
<0.1
4.8
<0.3
5.0
<0.5
5.5
<0.5
I nco
Light
= incident-scattered light of upward-directed hemisphere; Refl. light
= reflected-scattered light of downward-directed hemisphere.
June 4, 1974
Inc.
light
°C
(%)
20.8
100
54.1
20.5
35.3
19.6
23.5
17.4
15.3
14.9
13.8
13.1
8.9
12.1
6.0
10.8
4.6
8.7
2.9
7.0
2.1
6.2
1.5
5.9
1.2
5.5
0.9
5.5
<0.4
Refl.
light
(%)
100
18.8
16.3
11.7
8.3
5.4
3.0
2.4
1.8
1.2
0.8
0.7
0.7
0.7
N
Q)
m
><
CD
...
0
iii·
CD
I\)