Sökning: onr:"swepub:oai:gup.ub.gu.se/178165" >
Coralline algal Bar...
Coralline algal Barium as indicator for 20th century northwestern North Atlantic surface ocean freshwater variability
-
Hetzinger, S. (författare)
-
Halfar, J. (författare)
-
- Zack, Thomas, 1968 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
-
visa fler...
-
Mecking, J. V. (författare)
-
Kunz, B. E. (författare)
-
Jacob, D. E. (författare)
-
Adey, W. H. (författare)
-
visa färre...
-
(creator_code:org_t)
- 2013-05-02
- 2013
- Engelska.
-
Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 3
- Relaterad länk:
-
https://www.nature.c...
-
visa fler...
-
https://gup.ub.gu.se...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- During the past decades climate and freshwater dynamics in the northwestern North Atlantic have undergone major changes. Large-scale freshening episodes, related to polar freshwater pulses, have had a strong influence on ocean variability in this climatically important region. However, little is known about variability before 1950, mainly due to the lack of long-term high-resolution marine proxy archives. Here we present the first multidecadal-length records of annually resolved Ba/Ca variations from Northwest Atlantic coralline algae. We observe positive relationships between algal Ba/Ca ratios from two Newfoundland sites and salinity observations back to 1950. Both records capture episodical multi-year freshening events during the 20th century. Variability in algal Ba/Ca is sensitive to freshwater-induced changes in upper ocean stratification, which affect the transport of cold, Ba-enriched deep waters onto the shelf (highly stratified equals less Ba/Ca). Algal Ba/Ca ratios therefore may serve as a new resource for reconstructing past surface ocean freshwater changes.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas