Figures

Stenseth-Plate1.qxd 31#12#03 3:29 PM Page 1
NAO +
Russian rivers
farther east
°
60
°
60
–CHL
Warmer Atlantic
inflow to A.O.
Ice flux+
50
°
50
°
NwAC Narrow
Fast
Small
Calanus fin.
stock
Min. Baltic
ice
Max. Baltic
inflow
+
RA
IN
Storm centre in
Lab-Nordic Seas
L
+LSW
PRODN.
FST
MAX
ies
+Westerl
65Mts NAC
Warm
H
+Sah
ara d
ust
+Coastal
upwelling
+Trades
cold
Base map: Inst. of Geography, U. Berne
40°
Plate 1a A schematic of the Atlantic–Arctic sector under NAO-positive conditions. The following will explain the abbreviated text and symbols
and provide references to the sources of information.
Stenseth-Plate1.qxd 31#12#03 3:29 PM Page 2
Russian rivers
to Eurasian
basin. +CHL
60
°
60
°
NAO –
Ice flux50
°
°
50
H
NwAC broad
slow
Sea ice
+650k km
40
+GSDW
PRODN
°
Large
Calanus fin.
stock
Warm
L
Storm
centre off
US coast
+ 300 k km
Baltic Ice
FST
MIN
LC+1 Sv
50Mts NAC
+18 W
PRODN
Westerlies
+Rain
H
Warm - Trades
30 °
Base map: Inst. of Geography, U. Berne
40 °
Plate 1b A schematic of the Atlantic–Arctic sector under NAO-negative conditions. The following will explain the abbreviated text and symbols
and provide references to the sources of information.
Stenseth-Plate1.qxd 31#12#03 3:29 PM Page 3
(a)
1
0.6
0.2
–0.2
–0.6
–1
(b)
1
0.6
0.2
–0.2
–0.6
–1
Plate 2 Spatial distribution of the Pearson correlation coefficient between the NAO index and (a) local scalar windspeed and (b) local SST for
winter (January–March) over 1950–95 (courtesy of Ben Planque).
Pressure, db
Pressure, db
Stenseth-Plate1.qxd 31#12#03 3:29 PM Page 4
0
–200
–400
–600
–800
–1000
–1200
–1400
–1600
–1800
–2000
–2200
–2400
–2600
–2800
–3000
–3200
–3400
–3600
0
–200
–400
–600
–800
–1000
–1200
–1400
–1600
–1800
–2000
–2200
–2400
–2600
–2800
–3000
–3200
–3400
–3600
1940
1945
1960
1965
1970
1975
1980
1985
1990
1995
2000
1940 1945 1950 1955 1960
S medians (Sigma2-year)
1965
1970
Year
1975
1980
1985
1990
1995
2000
1940
1960
1965
1970
1975
1980
1985
1990
1995
2000
1940 1945 1950 1955 1960
T medians (Sigma2-year)
1965
1970
Year
1975
1980
1985
1990
1995
2000
1945
1950
1950
1955
1955
0
–200
–400
–600
–800
–1000
–1200
–1400
–1600
–1800
–2000
–2200
–2400
–2600
–2800
–3000
–3200
–3400
–3600
34.96
34.95
34.94
34.93
34.92
34.91
34.90
34.89
34.88
34.87
34.85
34.86
34.85
34.84
34.83
34.82
34.81
34.80
34.75
34.70
34.60
34.40
34.20
34.00
33.50
33.00
32.00
0
–200
–400
–600
–800
–1000
–1200
–1400
–1600
–1800
–2000
–2200
–2400
–2600
–2800
–3000
–3200
–3400
–3600
9.0
7.0
6.0
5.0
4.0
3.6
3.4
3.2
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
Plate 3 Changes in the potential temperature (; upper panel) and salinity (lower panel) of the watercolumn in the Central Labrador Sea over
the complete period of the hydrographic record since 1938. The data set was selected to lie within the 3300-m isobath of the Labrador Sea, and
the plots represent the median values of vertical property profiles, binned according to 2 density intervals. Kindly provided by Igor Yashayaev.