-65 -60 -55 -50 -45 -400
10
20
30
40N
itrat
e co
ncen
tratio
n [m
mol
m]
-3(a)
NdeepWinterSummer
-65 -60 -55 -50 -45 -400
20
40
60
80
100
Silic
ate
conc
entra
tion
[mm
ol m
]-3
(b)SideepSummerWinter
-65 -60 -55 -50 -45 -40Latitude [°N]
0
0.2
0.4
0.6
0.8
1
1.2
Iron
con
cent
ratio
n [
mol
m
]-3
(c)FedeepWinterSummer
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