Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf
Increased oceanic heat transport plays a key role in the accelerated mass loss of Greenland's marine-terminating glaciers. The melt rate of major glaciers in Northeast Greenland (NEG) is controlled by ocean variability, in particular warm Atlantic Intermediate Water (AIW), on the continental sh...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Geophysical Union (AGU)
2023
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/59111/ https://epic.awi.de/id/eprint/59111/1/JGR%20Oceans%20-%202023%20-%20McPherson%20-%20Shifts%20of%20the%20Recirculation%20Pathways%20in%20Central%20Fram%20Strait%20Drive%20Atlantic%20Intermediate.pdf https://doi.org/10.1029/2023jc019915 https://hdl.handle.net/10013/epic.b575fd52-420a-4500-a161-622c20e36b92 |
id |
ftawi:oai:epic.awi.de:59111 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:59111 2024-09-15T17:54:03+00:00 Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf McPherson, RA Wekerle, C Kanzow, T 2023-10 application/pdf https://epic.awi.de/id/eprint/59111/ https://epic.awi.de/id/eprint/59111/1/JGR%20Oceans%20-%202023%20-%20McPherson%20-%20Shifts%20of%20the%20Recirculation%20Pathways%20in%20Central%20Fram%20Strait%20Drive%20Atlantic%20Intermediate.pdf https://doi.org/10.1029/2023jc019915 https://hdl.handle.net/10013/epic.b575fd52-420a-4500-a161-622c20e36b92 unknown American Geophysical Union (AGU) https://epic.awi.de/id/eprint/59111/1/JGR%20Oceans%20-%202023%20-%20McPherson%20-%20Shifts%20of%20the%20Recirculation%20Pathways%20in%20Central%20Fram%20Strait%20Drive%20Atlantic%20Intermediate.pdf McPherson, R. , Wekerle, C. and Kanzow, T. (2023) Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf , Journal of Geophysical Research - Oceans, 128 (10) . doi:10.1029/2023jc019915 <https://doi.org/10.1029/2023jc019915> , hdl:10013/epic.b575fd52-420a-4500-a161-622c20e36b92 EPIC3Journal of Geophysical Research - Oceans, American Geophysical Union (AGU), 128(10), ISSN: 2169-9275 Article isiRev 2023 ftawi https://doi.org/10.1029/2023jc019915 2024-09-02T14:07:29Z Increased oceanic heat transport plays a key role in the accelerated mass loss of Greenland's marine-terminating glaciers. The melt rate of major glaciers in Northeast Greenland (NEG) is controlled by ocean variability, in particular warm Atlantic Intermediate Water (AIW), on the continental shelf. A high-resolution configuration of the ocean sea-ice model FESOM2.1 is assessed at local and regional scales, and used to investigate the drivers of AIW temperature variability on the NEG continental shelf. The seasonal to decadal variability of AIW is characterized, featuring both pronounced interannual fluctuations and a long-term warming trend. A major source of AIW is Atlantic Water (AW) originating from the West Spitsbergen Current that recirculates in Fram Strait. AW anomalies are advected westwards and partly control the AIW temperatures on the continental shelf. Increased AIW temperatures are also connected to pronounced northern and central branches of recirculating AW in Fram Strait, and enhanced AW temperatures more regionally. The strengthening of the pathways brings more warmer AIW onto the northern part of the NEG continental shelf. There, it circulates anti-cyclonically and results in shelf-wide warming. Regional atmospheric forcing is connected to the changes in the AW circulation. The strengthening of the northern AW branches is likely caused by anticyclonic wind anomalies over the Barents Sea that drive an enhanced northward AW transport in Fram Strait. Thus, controlled by a combination of both upstream and regionally forced circulation conditions, the changes in local AIW temperatures may also affect the oceanic heat transport reaching the Central Arctic Ocean. Article in Journal/Newspaper Arctic Ocean Barents Sea Fram Strait Greenland Sea ice Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Oceans 128 10 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Increased oceanic heat transport plays a key role in the accelerated mass loss of Greenland's marine-terminating glaciers. The melt rate of major glaciers in Northeast Greenland (NEG) is controlled by ocean variability, in particular warm Atlantic Intermediate Water (AIW), on the continental shelf. A high-resolution configuration of the ocean sea-ice model FESOM2.1 is assessed at local and regional scales, and used to investigate the drivers of AIW temperature variability on the NEG continental shelf. The seasonal to decadal variability of AIW is characterized, featuring both pronounced interannual fluctuations and a long-term warming trend. A major source of AIW is Atlantic Water (AW) originating from the West Spitsbergen Current that recirculates in Fram Strait. AW anomalies are advected westwards and partly control the AIW temperatures on the continental shelf. Increased AIW temperatures are also connected to pronounced northern and central branches of recirculating AW in Fram Strait, and enhanced AW temperatures more regionally. The strengthening of the pathways brings more warmer AIW onto the northern part of the NEG continental shelf. There, it circulates anti-cyclonically and results in shelf-wide warming. Regional atmospheric forcing is connected to the changes in the AW circulation. The strengthening of the northern AW branches is likely caused by anticyclonic wind anomalies over the Barents Sea that drive an enhanced northward AW transport in Fram Strait. Thus, controlled by a combination of both upstream and regionally forced circulation conditions, the changes in local AIW temperatures may also affect the oceanic heat transport reaching the Central Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
McPherson, RA Wekerle, C Kanzow, T |
spellingShingle |
McPherson, RA Wekerle, C Kanzow, T Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf |
author_facet |
McPherson, RA Wekerle, C Kanzow, T |
author_sort |
McPherson, RA |
title |
Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf |
title_short |
Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf |
title_full |
Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf |
title_fullStr |
Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf |
title_full_unstemmed |
Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf |
title_sort |
shifts of the recirculation pathways in central fram strait drive atlantic intermediate water variability on northeast greenland shelf |
publisher |
American Geophysical Union (AGU) |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/59111/ https://epic.awi.de/id/eprint/59111/1/JGR%20Oceans%20-%202023%20-%20McPherson%20-%20Shifts%20of%20the%20Recirculation%20Pathways%20in%20Central%20Fram%20Strait%20Drive%20Atlantic%20Intermediate.pdf https://doi.org/10.1029/2023jc019915 https://hdl.handle.net/10013/epic.b575fd52-420a-4500-a161-622c20e36b92 |
genre |
Arctic Ocean Barents Sea Fram Strait Greenland Sea ice Spitsbergen |
genre_facet |
Arctic Ocean Barents Sea Fram Strait Greenland Sea ice Spitsbergen |
op_source |
EPIC3Journal of Geophysical Research - Oceans, American Geophysical Union (AGU), 128(10), ISSN: 2169-9275 |
op_relation |
https://epic.awi.de/id/eprint/59111/1/JGR%20Oceans%20-%202023%20-%20McPherson%20-%20Shifts%20of%20the%20Recirculation%20Pathways%20in%20Central%20Fram%20Strait%20Drive%20Atlantic%20Intermediate.pdf McPherson, R. , Wekerle, C. and Kanzow, T. (2023) Shifts of the Recirculation Pathways in Central Fram Strait Drive Atlantic Intermediate Water Variability on Northeast Greenland Shelf , Journal of Geophysical Research - Oceans, 128 (10) . doi:10.1029/2023jc019915 <https://doi.org/10.1029/2023jc019915> , hdl:10013/epic.b575fd52-420a-4500-a161-622c20e36b92 |
op_doi |
https://doi.org/10.1029/2023jc019915 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
128 |
container_issue |
10 |
_version_ |
1810430241800192000 |