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Phytoplankton Chlorophyll trends in the Arctic (1998-2022) at the local, regional, and pan-Arctic scales
  • Camila Serra,
  • Camila Serra-Pompei,
  • Stephanie Dutkiewicz
Camila Serra

Corresponding Author:[email protected]

Author Profile
Camila Serra-Pompei
Center for Climate Change Science, Massachusetts Institute of Technology, National Institute for Aquatic Resources, Technical University of Denmark
Stephanie Dutkiewicz
Center for Climate Change Science, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology

Abstract

We analyzed the temporal trends (1998-2022) of surface phytoplankton Chlorophyll (Chl) concentration in the Arctic at the local, regional, and pan-Arctic scales. We used four empirically-derived Chl satellite ocean color products: three calibrated at the global scale, and one  algorithm calibrated to Arctic waters. Depending on the months considered, between 10-40\% of the area with valid pixels showed statistically significant Chl trends, with $\sim2/3$ of those pixels showing Chl increases, and the other third indicating a decrease. At the pan-Arctic level, three of the Chl products suggest median Chl has increased by 12-16\% since 1998. However, the product calibrated to the Arctic did not show a statistically significant trend. Our findings suggest that Chl trends in the Arctic are heterogeneous, and that magnitude and significance of trends can vary depending on the satellite product used.
09 Sep 2024Submitted to ESS Open Archive
09 Sep 2024Published in ESS Open Archive