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In-ice light measurements during the MOSAiC expedition.

Niels Fuchs¹, Philipp Anhaus², Mario Hoppmann²

¹Institute of Oceanography, Center for Earth System Research and Sustainability (CEN), Universität Hamburg, 20146, Hamburg, Germany. niels.fuchs@uni-hamburg.de.

Scientific Data

|June 27, 2024

Summary

We measured light in Arctic sea ice during the MOSAiC expedition. This data reveals how light penetrates the ice, crucial for understanding Arctic climate and ecosystems.

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Area of Science:

Oceanography
Climate Science
Remote Sensing

Background:

Arctic sea ice is critical for global climate and ecosystems.
Understanding light penetration in sea ice is vital for primary productivity and thermodynamic processes.
Vertical light partitioning data within sea ice is scarce.

Purpose of the Study:

To present novel light measurements within Arctic sea ice.
To detail the methods for retrieving optical properties and creating a data product.
To highlight the capabilities of the new 'lightharp' measurement system.

Main Methods:

Autonomous, multi-spectral light intensity measurements at various depths within the ice.
Utilized two distinct measurement systems: 'lightharp' and 'lightchain'.
Data collection occurred during the year-long MOSAiC drift expedition (2019-2020).

Main Results:

A comprehensive dataset of light measurements in Arctic sea ice was collected.
Methods for deriving optical properties and standardizing the data product are detailed.
Specifications of the newly developed 'lightharp' system are presented.

Conclusions:

The presented dataset offers a unique resource for studying light transmission and reflection in sea ice.
This data will enhance understanding of sea ice-air-ocean interactions and ecosystem impacts.
The findings contribute to the broader interdisciplinary research of the MOSAiC expedition.