Development and calibration of a high dynamic range and autonomous ocean-light instrument to measure sub-surface profiles in ice-covered waters

Bernhard Schartmüller, Philip Anderson, David Mckee, Stacey Connan-Mcginty, Tomasz p. Kopec, Malin Daase, Geir Johnsen, Jørgen Berge

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
37 Downloads (Pure)

Abstract

The optical chain and logger (OptiCAL) is an autonomous ice-tethered observatory equipped with multiple light sensors for mapping the variation of light with depth. We describe the instrument and present an ensemble calibration for downwelling irradiance EPAR in [µmolm−2s−1]. Results from a long-term deployment in the Arctic Ocean demonstrate that the OptiCAL can cover the high dynamic range of under-ice light levels from July to November and produce realistic values in terms of magnitude when compared to modeled surface irradiance. Transient features of raised light levels at specific depths associated with nearby leads in the ice underline the importance of depth-resolved light measurements.
Original languageEnglish
Article number8308
Number of pages8
JournalApplied Optics
Volume62
Issue number31
DOIs
Publication statusPublished - 23 Oct 2023

Fingerprint

Dive into the research topics of 'Development and calibration of a high dynamic range and autonomous ocean-light instrument to measure sub-surface profiles in ice-covered waters'. Together they form a unique fingerprint.

Cite this