ub.xmlui.mirage2.page-structure.muninLogoub.xmlui.mirage2.page-structure.openResearchArchiveLogo
    • EnglishEnglish
    • norsknorsk
  • Velg spraaknorsk 
    • EnglishEnglish
    • norsknorsk
  • Administrasjon/UB
Vis innførsel 
  •   Hjem
  • Fakultet for biovitenskap, fiskeri og økonomi
  • Institutt for arktisk og marin biologi
  • Artikler, rapporter og annet (arktisk og marin biologi)
  • Vis innførsel
  •   Hjem
  • Fakultet for biovitenskap, fiskeri og økonomi
  • Institutt for arktisk og marin biologi
  • Artikler, rapporter og annet (arktisk og marin biologi)
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Marine CO2 system variability in a high arctic tidewater-glacier fjord system, Tempelfjorden, Svalbard

Permanent lenke
https://hdl.handle.net/10037/17832
DOI
https://doi.org/10.1016/j.csr.2019.04.013
Thumbnail
Åpne
article.pdf (6.125Mb)
Akseptert manusversjon (PDF)
Dato
2019-05-04
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Ericson, Ylva; Falck, Eva; Chierici, Melissa; Fransson, Agneta Ingrid; Kristiansen, Svein
Sammendrag
The marine CO2 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 CO2 (pCO2, 140 μatm) and the saturation state of aragonite (ΩAr, 0.9). Over the period of peak freshwater discharge (June to August), the freshwater addition and air-sea CO2 uptake (on average 15.5 mmol m−2 day−1 in 2017) governed the surface pCO2. About one fourth of the uptake was driven by the freshening. The sensitivity of ΩAr to the freshwater addition was investigated using robust regressions. If the effect of air-sea CO2 exchange was removed from ΩAr, a freshwater fraction larger than 50% (lower range of uncertainty) was needed to provide aragonite undersaturated waters. This study shows that ΩAr and freshwater fraction relationships that are derived from regression techniques and the interpretation thereof are sensitive to the effect of air-sea CO2 exchange. Since the freshening in itself only drives a fraction of the air-sea CO2 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 CO2 uptake and brine release during the period of sea ice growth.
Beskrivelse
Accepted manuscript version, licensed CC BY-NC-ND 4.0.
Forlag
Elsevier
Sitering
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
Metadata
Vis full innførsel
Samlinger
  • Artikler, rapporter og annet (arktisk og marin biologi) [1636]
© 2019 Elsevier Ltd. All rights reserved.

Bla

Bla i hele MuninEnheter og samlingerForfatterlisteTittelDatoBla i denne samlingenForfatterlisteTittelDato
Logg inn

Statistikk

Antall visninger
UiT

Munin bygger på DSpace

UiT Norges Arktiske Universitet
Universitetsbiblioteket
uit.no/ub - munin@ub.uit.no

Tilgjengelighetserklæring