Winter seal-based observations reveal glacial meltwater surfacing in the southeastern Amundsen Sea

Yixi Zheng*, Karen Heywood, Benjamin Webber, David Stevens, Louise Biddle, Lars Boehme, Brice Loose

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Downloads (Pure)

Abstract

Determining the injection of glacial meltwater into the polar oceans is crucial for quantifying the response of the climate system to ice sheet mass loss. However, meltwater is poorly observed and its pathways poorly known, especially in winter. Here we present winter meltwater distribution in the eastern Amundsen Sea near Pine Island Glacier, revealing a highly variable meltwater distribution with two meltwater-rich layers in the upper 250 m and at around 450 m, connected by scattered meltwater-rich columns. We show that the hydrographic signature of meltwater is clearest in winter, when its presence can be unambiguously mapped throughout the water column. We argue that the buoyant meltwater provides near-surface nutrient that enhances productivity and heat that helps maintain polynyas, close to ice shelves across the Amundsen Sea. Therefore, although the processes determining the distribution of meltwater are challenging, they are important to represent in Earth system models.
Original languageEnglish
Article number40
Number of pages9
JournalCommunications Earth & Environment
Volume2
DOIs
Publication statusPublished - 5 Mar 2021

Fingerprint

Dive into the research topics of 'Winter seal-based observations reveal glacial meltwater surfacing in the southeastern Amundsen Sea'. Together they form a unique fingerprint.

Cite this