Potential controls of isoprene in the surface ocean.

Hackenberg, SC; Andrews, SJ; Chance, RJ; Brewin, RJW; Tarran, GA; Tilstone, GH; Manaeian, JK; Small, A; Bouman, H; Dall'Olmo, GD; Reifel, KM; Airs, RL; Cummings, DG; Lewis, AC; Carpenter, LJ. 2017 Potential controls of isoprene in the surface ocean.. Global Biogeochemical Cycles. 644-662. 10.1002/2016GB005531

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Abstract/Summary

Isoprene surface ocean concentrations and vertical distribution, atmospheric mixing ratios and calculated sea-to-air fluxes spanning approximately 125 degrees of latitude (80 °N - 45 °S) over the Arctic and Atlantic Oceans are reported. Oceanic isoprene concentrations were associated with a number of concurrently monitored biological variables including chlorophyll a (Chl a), photo-protective pigments, integrated primary production (intPP) and cyanobacterial cell counts, with higher isoprene concentrations relative to all respective variables found at sea surface temperatures greater than 20 °C. The correlation between isoprene and the sum of photo-protective carotenoids, which is reported here for the first time, was the most consistent across all cruises. Parameterisations based on linear regression analyses of these relationships perform well for Arctic and Atlantic data, producing a better fit to observations than an existing Chl a–based parameterisation. Global extrapolations of isoprene surface water concentrations using satellite-derived Chl a and intPP were able to reproduce general trends in the in situ data and absolute values within a factor of 2 between 60% and 85% of the time, depending on the data set and algorithm used.

Item Type: Publication - Article
Subjects: Atmospheric Sciences
Biology
Chemistry
Ecology and Environment
Marine Sciences
Oceanography
Divisions: Plymouth Marine Laboratory > National Capability categories > Atlantic Meridional Transect
Depositing User: Glen Tarran
Date made live: 13 Mar 2017 14:27
Last Modified: 31 Jul 2017 01:58
URI: http://plymsea.ac.uk/id/eprint/7419

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