Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence
The hydrographic situation for a region north of Svalbard is investigated using observations from the Norwegian Young Sea Ice Cruise (N-ICE2015). Observations from January to June 2015 are compared to historical observations with a particular focus on the warm and salty Atlantic Water (AW) entering...
Main Author: | |
---|---|
Format: | Master Thesis |
Language: | English |
Published: |
The University of Bergen
2016
|
Subjects: | |
Online Access: | https://hdl.handle.net/1956/12661 |
id |
ftunivbergen:oai:bora.uib.no:1956/12661 |
---|---|
record_format |
openpolar |
spelling |
ftunivbergen:oai:bora.uib.no:1956/12661 2023-05-15T14:51:54+02:00 Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence Muilwijk, Morven Korneel 2016-05-24 13773691 bytes application/pdf https://hdl.handle.net/1956/12661 eng eng The University of Bergen https://hdl.handle.net/1956/12661 Copyright the Author. All rights reserved Atlantic water Oceanography Nansen Basin Arctic Sea Ice Lance Global warming Climate change Svalbard Hydrography ADCP CTD Mixed Layer N-ICE2015 Fram Bottom Melting PHC World Ocean Atlas AOTIM Circulation NorESM Model Ocean Nautilus Tides TEOS-10 Freshwater 756213 Master thesis 2016 ftunivbergen 2023-03-14T17:38:52Z The hydrographic situation for a region north of Svalbard is investigated using observations from the Norwegian Young Sea Ice Cruise (N-ICE2015). Observations from January to June 2015 are compared to historical observations with a particular focus on the warm and salty Atlantic Water (AW) entering the Arctic Ocean through the Fram Strait. Here we discuss how the AW has changed over time, what governs its characteristics, and how it might influence the sea ice cover. We find that AW characteristics north of Svalbard are mainly controlled by the distance along the inflow path, and by changes in inflowing AW temperature in the Fram Strait. AW characteristics north of Svalbard are also largely affected by local processes such as sea ice growth, melting and tidal induced mixing. Furthermore, one dimensional model results and observations show that AW has a direct impact on the sea ice cover north of Svalbard. Shallow and warm AW efficiently reduces sea ice growth and results in bottom melting throughout the whole year. The historical observations and outcome from a fully coupled earth system model show a warming trend of AW core temperature over the last few decades. We believe that the AW warming trend in the Arctic Ocean may be part of long term multi-decadal variability, which is influenced by anthropogenic forcing. Simulations suggest that approximately 30 % of the recent warming may be attributed to global warming. Master i Meteorologi og oseanografi MAMN-GEOF GEOF399 Master Thesis Arctic Arctic Ocean Climate change Fram Strait Global warming Nansen Basin Sea ice Svalbard University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Arctic Ocean Nautilus ENVELOPE(-67.167,-67.167,-67.650,-67.650) Svalbard |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Atlantic water Oceanography Nansen Basin Arctic Sea Ice Lance Global warming Climate change Svalbard Hydrography ADCP CTD Mixed Layer N-ICE2015 Fram Bottom Melting PHC World Ocean Atlas AOTIM Circulation NorESM Model Ocean Nautilus Tides TEOS-10 Freshwater 756213 |
spellingShingle |
Atlantic water Oceanography Nansen Basin Arctic Sea Ice Lance Global warming Climate change Svalbard Hydrography ADCP CTD Mixed Layer N-ICE2015 Fram Bottom Melting PHC World Ocean Atlas AOTIM Circulation NorESM Model Ocean Nautilus Tides TEOS-10 Freshwater 756213 Muilwijk, Morven Korneel Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence |
topic_facet |
Atlantic water Oceanography Nansen Basin Arctic Sea Ice Lance Global warming Climate change Svalbard Hydrography ADCP CTD Mixed Layer N-ICE2015 Fram Bottom Melting PHC World Ocean Atlas AOTIM Circulation NorESM Model Ocean Nautilus Tides TEOS-10 Freshwater 756213 |
description |
The hydrographic situation for a region north of Svalbard is investigated using observations from the Norwegian Young Sea Ice Cruise (N-ICE2015). Observations from January to June 2015 are compared to historical observations with a particular focus on the warm and salty Atlantic Water (AW) entering the Arctic Ocean through the Fram Strait. Here we discuss how the AW has changed over time, what governs its characteristics, and how it might influence the sea ice cover. We find that AW characteristics north of Svalbard are mainly controlled by the distance along the inflow path, and by changes in inflowing AW temperature in the Fram Strait. AW characteristics north of Svalbard are also largely affected by local processes such as sea ice growth, melting and tidal induced mixing. Furthermore, one dimensional model results and observations show that AW has a direct impact on the sea ice cover north of Svalbard. Shallow and warm AW efficiently reduces sea ice growth and results in bottom melting throughout the whole year. The historical observations and outcome from a fully coupled earth system model show a warming trend of AW core temperature over the last few decades. We believe that the AW warming trend in the Arctic Ocean may be part of long term multi-decadal variability, which is influenced by anthropogenic forcing. Simulations suggest that approximately 30 % of the recent warming may be attributed to global warming. Master i Meteorologi og oseanografi MAMN-GEOF GEOF399 |
format |
Master Thesis |
author |
Muilwijk, Morven Korneel |
author_facet |
Muilwijk, Morven Korneel |
author_sort |
Muilwijk, Morven Korneel |
title |
Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence |
title_short |
Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence |
title_full |
Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence |
title_fullStr |
Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence |
title_full_unstemmed |
Bottom melting of Arctic Sea Ice in the Nansen Basin due to Atlantic Water influence |
title_sort |
bottom melting of arctic sea ice in the nansen basin due to atlantic water influence |
publisher |
The University of Bergen |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/12661 |
long_lat |
ENVELOPE(-67.167,-67.167,-67.650,-67.650) |
geographic |
Arctic Arctic Ocean Nautilus Svalbard |
geographic_facet |
Arctic Arctic Ocean Nautilus Svalbard |
genre |
Arctic Arctic Ocean Climate change Fram Strait Global warming Nansen Basin Sea ice Svalbard |
genre_facet |
Arctic Arctic Ocean Climate change Fram Strait Global warming Nansen Basin Sea ice Svalbard |
op_relation |
https://hdl.handle.net/1956/12661 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766323047110803456 |