Flashcard library · Earth & Climate Science · PaperFren

Ice-core oleic acid tracks sub-Antarctic sea ice

Oleic acid in a Bouvet Island ice core covaries with MSA and winter–spring sea ice, suggesting a new marine biomarker.

Keep what you just learned

Save these 11 cards to your NoteFren library. Your first review starts right away, and each card links back to the study it came from.

Which new organic is proposed as a sea-ice marker?

Oleic acid, a phytoplankton fatty acid.

Where and how long is the Bouvet core?

Eastern slope ~350 m altitude, 14.2 m, dated 2001–2016.

What does PC4 group together?

MSA and oleic acid.

What is the oleic acid–MSA correlation?

r = 0.79 (p < 0.01).

Where is the SIC correlation region?

Along the maximum sea-ice-extent margin west of Bouvet, matching westerly transport.

What organics correlate with later-season ice farther south?

Oxalate, formate, and acetate.

Were terpene SOA preserved in the core?

No continuous terpene SOA records; many SOA compounds were not detected.

Why were C27–C30 fatty acids absent?

They mark terrestrial sources at a remote marine site.

How long were NAME back trajectories?

5-day trajectories for February and September in 2008–2010.

How much PCA variance do the first four components explain?

93%.

Could penguin colonies explain Bouvet oxalate?

Unlikely; 5-day trajectories do not reach Antarctic coastal colonies.