8
Land-Ocean Systems in the Siberian Arctic: Dynamics and History
We used this model for diagnostic calculation of three-dimensional fields of wind-driven,
thermohaline water circulation and sea level in the Laptev Sea.
Horizontal spatial resolution for our calculation was 55.6 km. We have simulated currents at
following 15 levels:
0,5, 10, 15,20,25,30, 50, 100, 150,200,300,400,500 and 1000 m.
Sigma-t L, em
30
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2
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Mally Taimyr 151
Sigma-t L,em
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month
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10 11 12
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2
3
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PreobraJenia 151.
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25 1.
20 •
15 10
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month
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7
8
9
10 11 12
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10·20 ... , -r, ---",--.-...--..., -'.;.:-' -r--r--.,--",mr~ntc:::.;h,
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8 •
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Sigma-t L,cm
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12 -10
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2
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Sannlkova
Figure 2: ___ Seasonal variability of the Laptev Sea level; - - - - - Seasonal variability of the Laptev Sea
water density (sigma t).
Seasonal variability of the level surface and water circulation
The variability of the Laptev Sea level within a year from observational data at some coastal and
island stations is given in Figure 2, has the features, that are also typical for other Siberian shelf
seas. In particular, the minimum sea level values are recorded everywhere in April and the
maximum in July. The difference in the level between these extremes ranges from 15 to 30 cm,
depending on the location of the stations. The general tendency is that amplitudes of seasonal
level variations are rising from north to south (Figure 3). Maximum amplitudes of seasonal
level variations are observed at the island stations, in inlets and river mouths and the minimum
amplitudes are recorded at the island stations in the open sea area. The most intense level
increase occurs in May.
In August-September at most coastal and island stations there is a relatively small sea level
drop and in October almost everywhere the second local extreme value is observed. At this time
Land-Ocean Systems in the Siberian Arctic: Dynamics and History
We used this model for diagnostic calculation of three-dimensional fields of wind-driven,
thermohaline water circulation and sea level in the Laptev Sea.
Horizontal spatial resolution for our calculation was 55.6 km. We have simulated currents at
following 15 levels:
0,5, 10, 15,20,25,30, 50, 100, 150,200,300,400,500 and 1000 m.
Sigma-t L, em
30
,.
20
·1.
15
,
i
I
1
2
3
Mally Taimyr 151
Sigma-t L,em
25
23 10
20
t8
15
1.
13
"
month
•
i
,
10 11 12
Sigma..t L, em
30
,.
.. .........
20
·1.
15
I
i i i
1
2
3
4
PreobraJenia 151.
Sigma.t L,cm
30 2.
25 1.
20 •
15 10
,
, ~
\
,
..
month
, , , , , ,
7
8
9
10 11 12
"
10·20 ... , -r, ---",--.-...--..., -'.;.:-' -r--r--.,--",mr~ntc:::.;h,
10... ..., -r, --'-"'-"'--'''''-'"T":---,,-...--r, .-:::m,;::on~th,
1
2
3
B
7
10 11
12
1
2
6
7
8
10 11
12
Terplay-Tumsa
Dunay 151.
Sigma-t L, em
15 20
13 1.
10
8 •
'.
Sigma-t L,cm
20 20
18
---'"
1.
18
14
12 -10
10.20 ~, ~,_~~~-r~_~~~,,...-'!mon:;::, :.:=.;th,
1
2
10 11
12
Sannlkova
Figure 2: ___ Seasonal variability of the Laptev Sea level; - - - - - Seasonal variability of the Laptev Sea
water density (sigma t).
Seasonal variability of the level surface and water circulation
The variability of the Laptev Sea level within a year from observational data at some coastal and
island stations is given in Figure 2, has the features, that are also typical for other Siberian shelf
seas. In particular, the minimum sea level values are recorded everywhere in April and the
maximum in July. The difference in the level between these extremes ranges from 15 to 30 cm,
depending on the location of the stations. The general tendency is that amplitudes of seasonal
level variations are rising from north to south (Figure 3). Maximum amplitudes of seasonal
level variations are observed at the island stations, in inlets and river mouths and the minimum
amplitudes are recorded at the island stations in the open sea area. The most intense level
increase occurs in May.
In August-September at most coastal and island stations there is a relatively small sea level
drop and in October almost everywhere the second local extreme value is observed. At this time