ORCID
0000-0003-3392-0316 (Turner)
Document Type
Article
Publication Date
2025
DOI
10.1002/lol2.70043
Publication Title
Limnology and Oceanography Letters
Volume
Advance online publication
Pages
12 pp.
Abstract
Ocean color-based estimates of Antarctic net primary productivity (NPP) have indicated low nearshore productivity in ice-adjacent waters, contrasting with coupled physical–biogeochemical models. To understand this discrepancy, we assessed satellite records of polynya NPP by comparing field data with two satellite imagery datasets derived using different processing schemes. Our results indicate historical underestimation of chlorophyll a for imagery obtained using default atmospheric correction processing within approximately 100 km of ice-covered coastlines due to adjacency effects. Using radiative transfer modeling, we find that biases in ocean color polynya observations due to adjacency effects correspond to the high albedo of ice and snow. When applying an atmospheric correction processing scheme more robust to adjacency contamination, estimates of NPP more than doubled in 65% of polynyas, especially smaller eastern Antarctic polynyas. Adjacency effects should therefore be accounted for when analyzing spatial and temporal trends in Antarctic coastal primary productivity.
Rights
© 2025 The Authors.
This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Data Availability
Article states: "All derived and modeled 10-yr climatologies (OBPG/L2gen Chl a, OBPG/L2gen nFLH, OC-CCI Chl a, OBPG/L2gen modeled VGPM NPP, and OC-CCI modeled VGPM NPP) and satellite/in situ data matchups are archived at Zenodo at https://doi.org/10.5281/zenodo.15231504."
Original Publication Citation
Oliver, H., Turner, J. S., Castagna, A., Houskeeper, H., & Dierssen, H. (2025). High antarctic coastal productivity in polynyas revealed by considering remote sensing ice-adjacency effects. Limnology and Oceanography Letters. Advance online publication. https://doi.org/10.1002/lol2.70043
Repository Citation
Oliver, Hilde; Turner, Jessica S.; Castagna, Alexandre; Houskeeper, Henry; and Dierssen, Heidi, "High Antarctic Coastal Productivity in Polynyas Revealed by Considering Remote Sensing Ice-Adjacency Effects" (2025). OES Faculty Publications. 556.
https://digitalcommons.odu.edu/oeas_fac_pubs/556
Supporting Information
Included in
Oceanography Commons, Optics Commons, Remote Sensing Commons, Theory and Algorithms Commons