Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard
Accepted manuscript version, licensed CC BY-NC-ND 4.0. The marine CO 2 system in Tempelfjorden (Svalbard) was investigated between August 2015 and December 2017 using total alkalinity, pH, temperature, salinity, oxygen isotopic ratio, and nutrient data. Primary production resulted in the largest cha...
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ftunivtroemsoe:oai:munin.uit.no:10037/17832 2023-05-15T14:27:19+02:00 Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard Ericson, Ylva Falck, Eva Chierici, Melissa Fransson, Agneta Ingrid Kristiansen, Svein 2019-05-04 https://hdl.handle.net/10037/17832 https://doi.org/10.1016/j.csr.2019.04.013 eng eng Elsevier Continental Shelf Research Norges forskningsråd: 10662 info:eu-repo/grantAgreement/RCN/SSF/269998/Norway/Seasonal variability in glacial meltwater and sea-air CO2 fluxes in Tempelfjorden, Svalbard (RiS ID 10662)// Ericson Y, Falck E, Chierici M, Fransson AI, Kristiansen S. Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard. Continental Shelf Research. 2019;181:1-13 FRIDAID 1706544 doi:10.1016/j.csr.2019.04.013 0278-4343 1873-6955 https://hdl.handle.net/10037/17832 openAccess © 2019 Elsevier Ltd. All rights reserved. VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2019 ftunivtroemsoe https://doi.org/10.1016/j.csr.2019.04.013 2021-06-25T17:57:06Z Accepted manuscript version, licensed CC BY-NC-ND 4.0. The marine CO 2 system in Tempelfjorden (Svalbard) was investigated between August 2015 and December 2017 using total alkalinity, pH, temperature, salinity, oxygen isotopic ratio, and nutrient data. Primary production resulted in the largest changes that were observed in the partial pressure of CO 2 ( p CO 2 , 140 μatm) and the saturation state of aragonite (Ω Ar , 0.9). Over the period of peak freshwater discharge (June to August), the freshwater addition and air-sea CO 2 uptake (on average 15.5 mmol m −2 day −1 in 2017) governed the surface p CO 2 . About one fourth of the uptake was driven by the freshening. The sensitivity of Ω Ar to the freshwater addition was investigated using robust regressions. If the effect of air-sea CO 2 exchange was removed from Ω Ar , a freshwater fraction larger than 50% (lower range of uncertainty) was needed to provide aragonite undersaturated waters. This study shows that Ω Ar and freshwater fraction relationships that are derived from regression techniques and the interpretation thereof are sensitive to the effect of air-sea CO 2 exchange. Since the freshening in itself only drives a fraction of the air-sea CO 2 uptake, studies that do not account for this exchange will overestimate the impact of freshwater on ΩAr. Finally, in the summer an excess in the salinity normalized dissolved inorganic carbon, corrected for aerobic primary production/respiration, of on average 86 μmol kg −1 was found in the deepest water of the fjord. This excess is suggested to be a result of enhanced CO 2 uptake and brine release during the period of sea ice growth. Article in Journal/Newspaper Arctic Arctic glacier Sea ice Svalbard Tempelfjord* Tempelfjorden Tidewater University of Tromsø: Munin Open Research Archive Arctic Svalbard Tempelfjorden ENVELOPE(17.076,17.076,78.404,78.404) Continental Shelf Research 181 1 13 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 |
spellingShingle |
VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 Ericson, Ylva Falck, Eva Chierici, Melissa Fransson, Agneta Ingrid Kristiansen, Svein Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard |
topic_facet |
VDP::Mathematics and natural science: 400 VDP::Matematikk og Naturvitenskap: 400 |
description |
Accepted manuscript version, licensed CC BY-NC-ND 4.0. The marine CO 2 system in Tempelfjorden (Svalbard) was investigated between August 2015 and December 2017 using total alkalinity, pH, temperature, salinity, oxygen isotopic ratio, and nutrient data. Primary production resulted in the largest changes that were observed in the partial pressure of CO 2 ( p CO 2 , 140 μatm) and the saturation state of aragonite (Ω Ar , 0.9). Over the period of peak freshwater discharge (June to August), the freshwater addition and air-sea CO 2 uptake (on average 15.5 mmol m −2 day −1 in 2017) governed the surface p CO 2 . About one fourth of the uptake was driven by the freshening. The sensitivity of Ω Ar to the freshwater addition was investigated using robust regressions. If the effect of air-sea CO 2 exchange was removed from Ω Ar , a freshwater fraction larger than 50% (lower range of uncertainty) was needed to provide aragonite undersaturated waters. This study shows that Ω Ar and freshwater fraction relationships that are derived from regression techniques and the interpretation thereof are sensitive to the effect of air-sea CO 2 exchange. Since the freshening in itself only drives a fraction of the air-sea CO 2 uptake, studies that do not account for this exchange will overestimate the impact of freshwater on ΩAr. Finally, in the summer an excess in the salinity normalized dissolved inorganic carbon, corrected for aerobic primary production/respiration, of on average 86 μmol kg −1 was found in the deepest water of the fjord. This excess is suggested to be a result of enhanced CO 2 uptake and brine release during the period of sea ice growth. |
format |
Article in Journal/Newspaper |
author |
Ericson, Ylva Falck, Eva Chierici, Melissa Fransson, Agneta Ingrid Kristiansen, Svein |
author_facet |
Ericson, Ylva Falck, Eva Chierici, Melissa Fransson, Agneta Ingrid Kristiansen, Svein |
author_sort |
Ericson, Ylva |
title |
Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard |
title_short |
Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard |
title_full |
Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard |
title_fullStr |
Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard |
title_full_unstemmed |
Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard |
title_sort |
marine co2 system variability in a high arctic tidewater-glacier fjord system, tempelfjorden, svalbard |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/17832 https://doi.org/10.1016/j.csr.2019.04.013 |
long_lat |
ENVELOPE(17.076,17.076,78.404,78.404) |
geographic |
Arctic Svalbard Tempelfjorden |
geographic_facet |
Arctic Svalbard Tempelfjorden |
genre |
Arctic Arctic glacier Sea ice Svalbard Tempelfjord* Tempelfjorden Tidewater |
genre_facet |
Arctic Arctic glacier Sea ice Svalbard Tempelfjord* Tempelfjorden Tidewater |
op_relation |
Continental Shelf Research Norges forskningsråd: 10662 info:eu-repo/grantAgreement/RCN/SSF/269998/Norway/Seasonal variability in glacial meltwater and sea-air CO2 fluxes in Tempelfjorden, Svalbard (RiS ID 10662)// Ericson Y, Falck E, Chierici M, Fransson AI, Kristiansen S. Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard. Continental Shelf Research. 2019;181:1-13 FRIDAID 1706544 doi:10.1016/j.csr.2019.04.013 0278-4343 1873-6955 https://hdl.handle.net/10037/17832 |
op_rights |
openAccess © 2019 Elsevier Ltd. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.csr.2019.04.013 |
container_title |
Continental Shelf Research |
container_volume |
181 |
container_start_page |
1 |
op_container_end_page |
13 |
_version_ |
1766300993997242368 |