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(1)

Formation of Antarctic Bottom Water on the continental shelf off

Larsen ice shelf

Mathias van Caspel, RalphTimmermann, Michael Schröder, Hartmut Hellmer

(2)

Weddell Sea: AABW source

Ronne Filchner Larsen

South Scotia Ridge AABW

Weddell Sea WSDW

(3)

Weddell Sea Deep Water origin

• Inflow from the East

Ronne Filchner Larsen

South Scotia Ridge

(4)

Weddell Sea Deep Water origin

• Inflow from the East

• Filchnner- Ronne

Ronne Filchner Larsen

South Scotia Ridge

(5)

Weddell Sea Deep Water origin

• Inflow from the East

• Filchnner- Ronne

• Larsen

Ronne Filchner Larsen

South Scotia Ridge

(6)

Hydrographic Data

• Three

Sections

• T, S, O2

van Caspel et al., 2015

(7)

Hydrographic Data

van Caspel et al., 2015

• T S

(8)

Hydrographic Data

van Caspel et al., 2015

• Densest water

(9)

Hydrographic Data

van Caspel et al., 2015

• along 1800m

isobath

(10)

Hydrographic Data

van Caspel et al., 2015

• along 1800m

isobath

(11)

Optimum Multiparameter Analysis

van Caspel et al., 2015

• Source water types:

• WSBW

• WDW

• LABW WSBW

WDW

LABW

(12)

Optimum Multiparameter Analysis

van Caspel et al., 2015

• Source water types:

• WSBW

• WDW

• LABW WSBW

WDW

LABW

(13)

Optimum Multiparameter Analysis

van Caspel et al., 2015

• Source water types:

• WSBW

• WDW

• LABW

(14)

Optimum Multiparameter Analysis

van Caspel et al., 2015

• Source water types:

• WSBW

• WDW

• LABW

• LCW

WSBW

WDW

LABW LCW

(15)

Optimum Multiparameter Analysis

van Caspel et al., 2015

• Source water types:

• WSBW

• WDW

• LABW

• LCW

(16)

Optimum Multiparameter Analysis

van Caspel et al., 2015

• along 1800m

isobath

(17)

Larsen: AABW source

• Increased

thickness of AABW layer

• More

AABW can leave the Weddell Sea

Ronne Filchner Larsen

South Scotia Ridge

(18)

Model experiment, FEOM

• Larsen Water Plume

Plume Water Tracer

(19)

Model experiment, FEOM

• Larsen Plume

• flows down in LIS-C

Plume Water Tracer

(20)

Model experiment, FEOM

• Larsen Plume

• flows down in LIS-C

• flows down in RT

Plume Water Tracer

(21)

the continental shelf off Larsen is important for Antarctic Bottom Water formation

Summary

(22)

the continental shelf off Larsen is important for Antarctic Bottom Water formation

van Caspel, et al, 2015

The flow of dense water plumes in the western Weddell Sea simulated with the Finite Element Ocean Model (FEOM).

in: Towards an Interdisciplinary Approach in Earth System Science. Springer, pp. 125-129.

Summary

van Caspel et al, 2015

Precursors of Antarctic Bottom Water formed on the continental shelf off Larsen ice shelf.

Deep Sea Research Part I: Oceanographic Research Papers 99, 1-9.

Referenzen

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