Auxiliary material for
Small-scale variability patterns of DMS and phytoplankton in surface waters of the
tropical and subtropical Atlantic, Indian and Pacific oceans
S-J.Royer1, A.S. Mahajan2, M. Galí1†, E. Saltzman3, R. Simó1*
1. Institut de Ciències del Mar (CSIC), Barcelona, Catalonia, Spain
2. Indian Institute of Tropical Meteorology (IITM), Pune, India
3. University of California, Irvine, Dept of Earth System Science, Irvine, USA
† Now at Takuvik Joint International Laboratory and Québec-Océan,
Université Laval, Québec, Canada
*Correspondence to:
Rafel Simó
Institut de Ciències del Mar (CSIC)
Passeig Marítim de la Barceloneta 37-49
08003 Barcelona, Catalonia, Spain
Email: rsimo@icm.csic.es
Office: +34 932309590
Figure S1: Circumnavigation track and leg numbers of the Malaspina 2010
expedition Continuous DMS data exist for parts of legs 2, 3, 4, 5 and 6. The
background shows the biogeographical (Longhurst) provinces visited during the
expedition. The acronyms refer to Longhurst’s biogeographical provinces: SPSG is
South Pacific Subtropical Gyre; PEQD is Pacific Equatorial Divergence; PNEC is
North Pacific Equatorial Countercurrent; NPTG is North Pacific Tropical Gyre;
SATL is South Atlantic Gyre; EAFR is East Africa Coastal; ISSG is Indian South
Subtropical Gyre; AUSW is Australia-Indonesia Coastal; SSTC is South Subtropical
Convergence; AUSE is East Australian Coastal; TASM is Tasman Sea.
Table S1. List of biogeogeographical (Longhurst) provinces visited during Malaspina 2010, ordered by date, number and mean length of the
transects analyzed per province, and the corresponding mean variability length scale (VLS - km) for salinity, sea-surface temperature (SST),
potential density (sigma-T), DMS, phytoplankton fluorescence (Fluo) and the efficiency of photosystem II (FvFm).
a
Longhurst provinces
#
Province name
transects
analyzed
Variability length scale (km)
Date 2011
Mean
transect
length (km)
Salinity
SST
Sigma-T
DMS
Fluo
FvFm
4
21/01-03/02
679
54±1
53±4
53±4
40±1
38
40
Coastal: E Africa Coastal
3
05/02-15/02
115
22±3
20
21±1
19±1
22
23±2
Trades: Indian S Subtropical Gyre
4
17/02-05/03
400
40
38±3
38±1
38±1
38
38
AUSW
Coastal: Australia-Indonesia Coastal
2
07/03-12/03
314
28±4
26±1
19±2
15
20
25
SSTC
Westerlies: S Subtropical Convergence
1
21/03-23/03
453
33
30
30
22
22
22
49
AUSE
Coastal: E Australian Coastal
4
24/03-26/03
312
30
27
28
20
18±2
20
36
TASM
Westerlies: Tasman Sea
3
12/04-14/04
218
19±1
21±1
23±5
21±1
27±6
30
37
SPSG
Westerlies: S Pacific Subtropical Gyre
1
20/04-24/04
1132
80
73
70
30
20
20
40
PEQD
Trades: Pacific Equatorial Divergence
2
29/04-04/05
503
50
50
50
50
40±1
37±2
39
PNEC
Trades: N Pacific Equatorial Countercurrent
2
05/05-19/05
268
20
20
18±3
21
20
25
38
NPTG
Trades: N Pacific Tropical Gyre
3
22/05-28/05
626
47±1
57±2
57±2
35±1
34
33
Province #
Acronym
10
SATL
Trades: S Atlantic Gyral
24
EAFR
23
ISSG
29
51
Errors represent standard deviations; when absent, it means all sections had the same VLS.
Table S2: Pearson’s correlation coefficients between province-averaged variability
length scales (VLS) of DMS and phytoplankton fluorescence (Fluo), and the
province-averaged magnitudes of several variables.
Provinces
VLS
Salinity
SST
Sigma-T
DMS
Fluo
FvFm
Latitude
DMS
0.26
0.48 *
(-)0.27
(-)0.04
(-)0.17
(-)0.69 **
(-)0.71 ***
Fluo
0.36
0.29
(-)0.07
(-)0.21
(-)0.22
(-)0.47 *
(-)0.50*
DMS
0.34
0.66
(-)0.40
(-)0.42
(-)0.86 **
(-)0.89 **
(-)0.64
Fluo
0.31
0.33
(-)0.14
(-)0.65 *
(-)0.61 *
(-)0.61 *
(-)0.43
Alla
DMS VLS
biologically
drivenb
(n=5)
a
Correlations using all biogeographical provinces.
b
Correlations using only the biologically driven provinces highlighted in Figure 2.
Probabilities of significance are: *** > 99%; ** > 95%; * > 90%.