Light Under Arctic Sea Ice in Observations and Earth System Models

Abstract

The changes in Arctic phytoplankton activity observed in recent decades related to changing Arctic sea ice and ocean conditions (Ardyna & Arrigo, 2020;Arrigo & van Dijken, 2015;Lewis et al., 2020) are expected to continue in this century (SIMIP Community, 2020;Vancoppenolle et al., 2013), with important implications for the Arctic marine food web (Post, 2017). However, large uncertainties remain, mostly due to a lack of knowledge of phytoplankton activity in the subglacial environment, hardly observable from satellites . Earth System Models (ESMs) and their sub-components foster progress in the knowledge of the Arctic Ocean phytoplankton and help quantifying pan-Arctic marine primary production (

Mapping Potential Timing of Ice Algal Blooms From Satellite

“…We also update the extinction coefficients based on Lebrun et al. (2023) and split the snow into two categories depending on if the snow is wet or dry (Table S1 in Supporting Information ).…”

“…The introduction of this progressively increasing SSL thickness increases the amount of PAR transmitted through snow-free thin ice, especially in the MIZ where the ice is often thinner than 80 cm. We also update the extinction coefficients based on Lebrun et al (2023) and split the snow into two categories depending on if the snow is wet or dry (Table S1 in Supporting Information S1).…”