Basin-Scale Observations of Monoterpenes in the Arctic and Atlantic Oceans

TY - JOUR

T1 - Basin-Scale Observations of Monoterpenes in the Arctic and Atlantic Oceans

AU - Hackenberg, Sina

AU - Andrews, Stephen Joseph

AU - Airs, Ruth L.

AU - Arnold, Steve R.

AU - Bouman, Heather A.

AU - Cummings, Denise

AU - Lewis, Alastair

AU - Minaeian, Jamie K

AU - Reifel, Kristen M.

AU - Small, Alison

AU - Tarran, Glen A.

AU - Tilstone, Gavin H.

AU - Carpenter, Lucy Jane

N1 - © 2017 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2017/9/19

Y1 - 2017/9/19

N2 - We report novel in situ speciated observations of monoterpenes (α- and β-pinene, myrcene, δ3-carene, ocimene, limonene) in seawater and air during three cruises in the Arctic and Atlantic Oceans, in/over generally oligotrophic waters. Oceanic concentrations of the individual monoterpenes ranged from below the detection limit of <1 pmol L -1 to 5 pmol L -1, with average concentrations of between 0.5 and 2.9 pmol L -1. After careful filtering for contamination, atmospheric mixing ratios varied from below the detection limit (<1 pptv) to 5 pptv, with averages of 0.05-5 pptv; these levels are up to 2 orders of magnitude lower than those reported previously. This could be at least partly due to sampling over waters with much lower biological activity than in previous studies. Unlike in previous studies, no clear relationships of the monoterpenes with biological variables were found. Based on our measured seawater concentrations and a global model simulation, we estimate total global marine monoterpene emissions of 0.16 Tg C yr -1, similar to a previous bottom-up estimate based on laboratory monoculture studies but 2 orders of magnitude lower than a previous top-down estimate of 29.5 Tg C yr -1.

AB - We report novel in situ speciated observations of monoterpenes (α- and β-pinene, myrcene, δ3-carene, ocimene, limonene) in seawater and air during three cruises in the Arctic and Atlantic Oceans, in/over generally oligotrophic waters. Oceanic concentrations of the individual monoterpenes ranged from below the detection limit of <1 pmol L -1 to 5 pmol L -1, with average concentrations of between 0.5 and 2.9 pmol L -1. After careful filtering for contamination, atmospheric mixing ratios varied from below the detection limit (<1 pptv) to 5 pptv, with averages of 0.05-5 pptv; these levels are up to 2 orders of magnitude lower than those reported previously. This could be at least partly due to sampling over waters with much lower biological activity than in previous studies. Unlike in previous studies, no clear relationships of the monoterpenes with biological variables were found. Based on our measured seawater concentrations and a global model simulation, we estimate total global marine monoterpene emissions of 0.16 Tg C yr -1, similar to a previous bottom-up estimate based on laboratory monoculture studies but 2 orders of magnitude lower than a previous top-down estimate of 29.5 Tg C yr -1.

UR - http://www.scopus.com/inward/record.url?scp=85029671788&partnerID=8YFLogxK

U2 - 10.1021/acs.est.7b02240

DO - 10.1021/acs.est.7b02240

M3 - Article

SN - 0013-936X

VL - 51

SP - 10449

EP - 10458

JO - Environmental science & technology

JF - Environmental science & technology

IS - 18

ER -