Exploring ocean biogeochemistry using a lab-on-chip phosphate analyser on an underwater glider
- Birchill, Antony J.
- Beaton, A. D.
- Hull, Tom
- Kaiser, Jan
- Mowlem, Matt
- Pascal, R.
- Schaap, A.
- Voynova, Yoana G.
- Williams, C.
- Palmer, M.
DOIAbstract
The ability to make measurements of phosphate (PO43–) concentrations at temporal and spatial scales beyond those offered by shipboard observations offers new opportunities for investigations of the marine phosphorus cycle. We here report the first in situ PO43– dataset from an underwater glider (Kongsberg Seaglider) equipped with a PO43– Lab-on-Chip (LoC) analyser. Over 44 days, a 120 km transect was conducted in the northern North Sea during late summer (August and September). Surface depletion of PO43– (<0.2 μM) was observed above a seasonal thermocline, with elevated, but variable concentrations within the bottom layer (0.30–0.65 μM). Part of the variability in the bottom layer is attributed to the regional circulation and across shelf e...
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