Variable

Method

Algal Cell Densities

Flow Cytometry

Alkalinity

Gran Electrotitration

Alkenon concentration

Gas chromatography

Alkenone ^δ13C

GCirmMS.

Bacterial Abundance

Microscopy

¹⁴C Primary production

Radiography

CDOM

Spectrophotometrically

Chlorophyll a

Fluorometry

Coccosphere/Coccolith size

SEM

Coccolith weight

SEM

pCO₂

Infra-red analyser (Li-Cor₇ 6262)

DOC

Shimadzu TOC analyzer

DIC

Calculated from pH & CO2

Light Intensity

Li-Cor spherical sensor (LI-193SA)

Mono- & Polysaccharides

Colorimetrically with TPTZ

Net Primary Production

Winkler titration

Nutrients

Autoanalyzer

O₂

Winkler titration

pH

Sensor

PIC

CHN-analyzer (TOC-POC)

POC

CHN-analyzer

PON

CHN-analyzer

POP

Colorimetrically

d¹³C-POC

Mass spectrometry

Salinity

CTD

Temperature

CTD

TEP

Colorimetrically, microscopy

Viral Densities

Flow cytometry