Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years
A high-resolution marine sediment core NP16-Kro1-MCB from Krossfjorden, Western Svalbard is studied to investigate changes in sea surface conditions in the fjord during the last 60 years (1953–2014). The diatom-based reconstruction of August sea surface temperature (aSST) demonstrates a clear warmin...
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ftunivmaynooth:oai:mural.maynoothuniversity.ie:13602 2023-05-15T14:53:37+02:00 Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years Guruvayoorappan, Harikrishnan Miettinen, Arto Divine, Dmitry Moros, Matthias Orme, Lisa C. Mohan, Rahul 2019 text https://mural.maynoothuniversity.ie/13602/ https://mural.maynoothuniversity.ie/13602/1/LO_ocean.pdf en eng Springer https://mural.maynoothuniversity.ie/13602/1/LO_ocean.pdf Guruvayoorappan, Harikrishnan and Miettinen, Arto and Divine, Dmitry and Moros, Matthias and Orme, Lisa C. and Mohan, Rahul (2019) Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years. Arktos. ISSN 2364-9453 Article PeerReviewed 2019 ftunivmaynooth 2022-06-13T18:47:59Z A high-resolution marine sediment core NP16-Kro1-MCB from Krossfjorden, Western Svalbard is studied to investigate changes in sea surface conditions in the fjord during the last 60 years (1953–2014). The diatom-based reconstruction of August sea surface temperature (aSST) demonstrates a clear warming trend of 0.6 °C through the record. As inferred from Marginal Ice Zone (MIZ) diatoms, surface warming occurs in parallel with a decline in sea ice extent (SIE) during recent decades. Factor analysis identified variations in diatom assemblages representing different water masses, showing a dominance of Arctic water diatoms throughout the period and decadal variations in the sea ice assemblage during periods of peak sea ice extent. The strong dominance of Arctic water diatoms along with increasing aSST suggest prolonged open-water conditions and increased sea ice melting in the region throughout the observed period. The reconstructed ocean surface changes are in line with the background warming occurring over the Arctic region. A comparison with instrumental records from neighboring regions supports the quality of the reconstructions, including the average reconstructed aSST and the magnitude of the warming trend. We suggest that increased CO2 forcing together with ocean–atmospheric interaction have caused the increasing SST trend and decreasing sea ice presence in Krossfjorden rather than an increasing influence from Atlantic Water, which has amplified changes in many regions of Svalbard. Article in Journal/Newspaper Arctic Krossfjord* Sea ice Svalbard Maynooth University ePrints and eTheses Archive (National University of Ireland) Arctic Krossfjorden ENVELOPE(11.742,11.742,79.141,79.141) Svalbard |
institution |
Open Polar |
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Maynooth University ePrints and eTheses Archive (National University of Ireland) |
op_collection_id |
ftunivmaynooth |
language |
English |
description |
A high-resolution marine sediment core NP16-Kro1-MCB from Krossfjorden, Western Svalbard is studied to investigate changes in sea surface conditions in the fjord during the last 60 years (1953–2014). The diatom-based reconstruction of August sea surface temperature (aSST) demonstrates a clear warming trend of 0.6 °C through the record. As inferred from Marginal Ice Zone (MIZ) diatoms, surface warming occurs in parallel with a decline in sea ice extent (SIE) during recent decades. Factor analysis identified variations in diatom assemblages representing different water masses, showing a dominance of Arctic water diatoms throughout the period and decadal variations in the sea ice assemblage during periods of peak sea ice extent. The strong dominance of Arctic water diatoms along with increasing aSST suggest prolonged open-water conditions and increased sea ice melting in the region throughout the observed period. The reconstructed ocean surface changes are in line with the background warming occurring over the Arctic region. A comparison with instrumental records from neighboring regions supports the quality of the reconstructions, including the average reconstructed aSST and the magnitude of the warming trend. We suggest that increased CO2 forcing together with ocean–atmospheric interaction have caused the increasing SST trend and decreasing sea ice presence in Krossfjorden rather than an increasing influence from Atlantic Water, which has amplified changes in many regions of Svalbard. |
format |
Article in Journal/Newspaper |
author |
Guruvayoorappan, Harikrishnan Miettinen, Arto Divine, Dmitry Moros, Matthias Orme, Lisa C. Mohan, Rahul |
spellingShingle |
Guruvayoorappan, Harikrishnan Miettinen, Arto Divine, Dmitry Moros, Matthias Orme, Lisa C. Mohan, Rahul Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years |
author_facet |
Guruvayoorappan, Harikrishnan Miettinen, Arto Divine, Dmitry Moros, Matthias Orme, Lisa C. Mohan, Rahul |
author_sort |
Guruvayoorappan, Harikrishnan |
title |
Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years |
title_short |
Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years |
title_full |
Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years |
title_fullStr |
Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years |
title_full_unstemmed |
Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years |
title_sort |
ocean surface warming in krossfjorden, svalbard, during the last 60 years |
publisher |
Springer |
publishDate |
2019 |
url |
https://mural.maynoothuniversity.ie/13602/ https://mural.maynoothuniversity.ie/13602/1/LO_ocean.pdf |
long_lat |
ENVELOPE(11.742,11.742,79.141,79.141) |
geographic |
Arctic Krossfjorden Svalbard |
geographic_facet |
Arctic Krossfjorden Svalbard |
genre |
Arctic Krossfjord* Sea ice Svalbard |
genre_facet |
Arctic Krossfjord* Sea ice Svalbard |
op_relation |
https://mural.maynoothuniversity.ie/13602/1/LO_ocean.pdf Guruvayoorappan, Harikrishnan and Miettinen, Arto and Divine, Dmitry and Moros, Matthias and Orme, Lisa C. and Mohan, Rahul (2019) Ocean surface warming in Krossfjorden, Svalbard, during the last 60 years. Arktos. ISSN 2364-9453 |
_version_ |
1766325219892396032 |