[Global Biogeochemical Cycles]
Supporting Information for
Short-term variability in euphotic zone biogeochemistry and primary productivity
at Station ALOHA: A case study of summer 2012
Samuel T. Wilson1,2, Benedetto Barone1,2, Francois Ascani1,3, Robert R. Bidigare1,4,
Matthew J. Church1,2, Daniela A. del Valle1,2, Sonya T. Dyhrman5, Sara Ferrón1,2, Jessica
N. Fitzsimmons6, Laurie W. Juranek7, Zbigniew S. Kolber8, Ricardo M. Letelier7, Sandra
Martínez-Garcia1,2, David P. Nicholson9, Kelvin J. Richards1, Yoshimi M. Rii1,2, Mónica
Rouco5, Donn A. Viviani1,2, Angelicque E. White7, Jonathan P. Zehr8 and David M.
Karl1,2
Department of Oceanography, University of Hawai‘i at Manoa, Honolulu, Hawai‘i, USA.
1
2
Daniel K. Inouye Center for Microbial Oceanography: Research and Education (C-MORE),
University of Hawai‘i at Manoa, Honolulu, Hawai‘i, USA.
3
Marine Science Department, University of Hawaii at Hilo, Hilo, USA.
Hawaii Institute of Marine Biology, University of Hawai‘i, Kaneohe, Hawai‘i, USA.
4
5
Department of Earth and Environmental Sciences and the Lamont-Doherty Earth Observatory,
Columbia University, Palisades, New York, USA
6
Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, New Jersey, USA
7
College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis,
Oregon, USA
8
Department of Ocean Sciences, University of California, Santa Cruz, California, USA
1
9
Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution,
Woods Hole, Massachusetts, USA
2
The two Tables included in the Supporting Information include the relevant hydrographic
parameters used to calculate the rates of net community production (NCP) and gross primary
production (GPP).
Table S1. Water-column properties and additional parameters used to calculate net
community production based on O2/Ar measurements (O2/AR-NCP).
Table S2. Water-column properties and additional parameters used to calculate 17Δ-GPP.
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Date
7/8/12
7/9/12
7/10/12
7/11/12
7/12/12
7/13/12
7/15/12
7/16/12
7/17/12
7/19/12
7/20/12
7/20/12
7/21/12
7/22/12
7/23/12
7/24/12
8/5/12
8/6/12
8/7/12
8/8/12
8/9/12
8/10/12
8/11/12
8/12/12
8/22/12
8/23/12
8/24/12
8/25/12
8/26/12
8/27/12
8/28/12
8/29/12
8/30/12
8/31/12
9/1/12
9/2/12
9/3/12
9/4/12
9/5/12
9/6/12
Temp
oC
24.67
24.70
24.71
24.71
24.62
24.64
24.63
24.64
24.65
24.72
24.72
24.94
24.76
24.87
24.95
24.94
25.06
25.04
25.08
25.10
25.19
25.24
25.16
25.31
25.46
25.51
25.51
25.56
25.55
25.60
25.57
25.52
25.50
25.51
25.49
25.41
25.45
25.45
25.44
25.40
Sal
35.38
35.39
35.36
35.31
35.29
35.30
35.28
35.26
35.26
35.22
35.21
35.31
35.25
35.27
35.25
35.24
35.25
35.25
35.27
35.23
35.21
35.25
35.25
35.16
35.35
35.40
35.35
35.29
35.22
35.18
35.16
35.17
35.19
35.21
35.19
35.28
35.29
35.09
35.04
35.02
O2_m
mol/kg
209.7
208.9
208.6
208.3
209.0
209.6
209.6
208.8
208.8
208.1
209.3
209.3
207.6
207.0
206.8
206.6
206.8
206.5
206.3
206.0
205.4
205.1
205.6
204.8
206.1
206.3
205.9
205.6
205.4
205.6
205.5
205.7
205.3
205.5
205.2
206.0
205.1
204.5
204.9
204.6
O2_eq
mol/kg
207.4
207.3
207.3
207.4
207.7
207.6
207.7
207.7
207.6
207.5
207.5
206.6
207.3
206.9
206.6
206.7
206.2
206.3
206.2
206.1
205.9
205.6
205.9
205.5
204.7
204.5
204.6
204.5
204.6
204.5
204.6
204.8
204.8
204.7
204.8
205.0
204.9
205.1
205.2
205.4
MLD
m
73
80
71
62
61
68
62
66
63
53
54
58
64
50
40
41
59
53
65
62
46
47
51
54
62
71
61
41
36
40
50
52
50
56
53
66
87
56
58
42
kw
m/d
7.7
7.6
7.3
7.2
7.3
7.3
7.2
7.3
7.3
6.8
6.6
6.3
6.1
6.0
6.1
6.2
5.7
5.7
5.9
5.8
5.7
5.6
5.6
5.7
4.9
4.9
4.8
4.8
4.9
5.0
5.2
5.3
5.4
5.5
5.6
5.9
6.1
6.3
6.2
6.1
O2/Ar
delta
0.0058
0.0064
0.0048
0.0037
0.0051
0.0074
0.0049
0.0042
0.0041
0.0058
0.0022
-0.0017
0.0011
0.0047
0.0037
-0.0001
-0.0070
-0.0113
-0.0096
-0.0060
-0.0048
-0.0070
-0.0027
-0.0029
-0.0033
-0.0005
0.0005
-0.0020
0.0002
0.0029
-0.0004
0.0044
0.0000
-0.0049
-0.0013
0.0022
0.0044
-0.0028
-0.0044
-0.0036
O2/Ar-NCP
mmol/m2/d
8.6
10.0
8.2
6.4
7.6
11.2
8.2
6.2
6.6
6.7
3.1
-1.1
1.8
5.8
4.5
2.8
-7.6
-15.4
-12.1
-4.2
-7.5
-6.3
-4.1
-3.5
-1.5
-0.5
0.3
-1.6
0.5
2.5
-0.6
2.7
-2.1
-3.6
-1.1
4.1
5.7
-4.6
-5.6
-2.3
Table S1. Water-column properties and additional parameters used to calculate net
community production based on O2/Ar measurements (O2/AR-NCP). [O2] is the
measured dissolved O2 concentrations for the mixed layer; [O2]eq is the equilibrium O2
concentration; MLD is the mixed layer depth calculated using the 0.125 kg m-3density
offset; kw is the weighted gas transfer velocity for O2, using the wind speed
4
parameterization of Wanninkhof [2014] and a 20-day weighting technique following
Reuer et al. [2007]; (O2/Ar) delta is the O2/Ar deviation from equilibrium.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Date
(Local)
8/23/12
8/24/12
8/26/12
8/28/12
8/28/12
8/29/12
8/30/12
8/31/12
8/31/12
8/31/12
8/31/12
8/31/12
8/31/12
9/1/12
9/1/12
9/1/12
9/1/12
9/3/12
9/4/12
9/5/12
9/6/12
9/7/12
Time
(Local)
0800
0800
0800
0800
0800
0800
0800
0001
0400
0800
1200
1600
2000
0001
0400
1200
1600
0800
0800
0800
0800
0800
Temp
oC
24.75
25.50
25.54
25.68
25.68
25.57
25.52
25.55
25.52
25.50
25.52
25.59
25.58
25.53
25.51
25.51
25.50
25.43
25.44
25.44
25.42
25.41
Sal
35.38
35.40
35.30
35.17
35.17
35.16
35.17
35.18
35.17
35.18
35.21
35.19
35.19
35.22
35.21
35.20
35.18
35.28
35.28
35.10
35.05
35.02
MLD
m
62
70
40
39
39
50
51
50
54
49
47
55
61
54
63
53
32
48
66
86
58
42
kw
m/d
4.9
4.9
4.8
5.0
5.0
5.2
5.3
5.4
5.4
5.4
5.4
5.4
5.4
5.5
5.5
5.5
5.5
5.9
6.1
6.3
6.2
6.1
17
Δ-GPP
mmol/m2/d
97.3
74.3
131.1
62.1
71.3
132.8
69.4
38.1
65.6
98.0
103.4
167.7
122.2
128.1
127.3
70.9
92.0
143.7
54.4
47.6
72.8
65.3
Table S2. Water-column properties and additional parameters used to calculate 17Δ-GPP
as per the method of Luz and Barkan [2000]. MLD is the mixed layer depth calculated
using the 0.125 kg m-3density offset; kw is the weighted gas transfer velocity for O2,
using the wind speed parameterization of Wanninkhof [2014] and a 20-day weighting
technique following Reuer et al. [2007].
References:
1
2
Luz, B., and E. Barkan (2000), Assessment of oceanic productivity with the triple-isotope
composition of dissolved oxygen, Science 288, 2028–2031, doi: 10.1126/science.288.5473.2028.
Reuer, M. K., B. A. Barnett, M. L. Bender, P. G. Falkowski, and M. B. Hendricks (2007), New
estimates of Southern Ocean biological production rates from O2/Ar ratios and the triple isotope
composition of O2, Deep-Sea Res., Part I, 54(6), 951–974, doi:910.1016/j.dsr.2007.1002.1007.
5
1
2
Wanninkhof, R. (2014), Relationship between wind speed and gas exchange over the ocean
revisited, Limnol. Oceanogr:Methods, 12(6), 351–362, doi: 10.4319/lom.2014.12.351
6