Professor Shubha Sathyendranath has received the 2026 Nansen Polar Bear Award – one of the most prestigious honours in environmental remote sensing research. Presented by the Nansen Environmental and Remote Sensing Center in Bergen on 12 May, the award recognises her contributions to marine optics, satellite oceanography and ocean-colour remote sensing – a field that allows scientists to read the ocean's biology from space by analysing the light it reflects. Sathyendranath is a long-standing contributor to ESA's Climate Change Initiative (CCI), where she leads multiple ocean science projects.
From ocean colour to tipping points
Sathyendranath has led the CCI’s Ocean Colour project for ten years, where she has helped build one of the most comprehensive long-term satellite records to chart global chlorophyll-a concentration used to chart phytoplankton: microscopic algae that play a critical role in the ocean's carbon cycle. Beyond that, she heads the project “Tipping Points and Abrupt Changes in Marine Ecosystems” (TIME), improving methodologies for assessing resilience in marine ecosystems, with the goal of providing early warnings of abrupt changes. She contributes to developing satellite-based data products for phytoplankton carbon biomass and pigment diversity with the Phytoplankton Biomass and Diversity project (PHYTO) and co-leads the Climate and Marine Production (CAMP) project to improve marine ecosystem and biogeochemical models.
“The climate team at ESA and I congratulate Professor Shubha Sathyendranath to this well-deserved award. Her work and influence greatly shaped the ESA Climate Change Initiative and it projects. We thank her for her incredible contribution to ocean science,” says Clement Albergel, Head of ESA’s Actionable Climate Information section.
Her research has strengthened the links between biology and physics, between the ocean and the atmosphere, and between observations and climate research – shaping how the science community understands the ocean's role in the climate system. Her contribution to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change in particular stands as a testament to the global reach of that work: she served as Lead Author of Chapter 2 – "Changing State of the Climate System" – in the Working Group I report on the Physical Science Basis of climate change.
A career built on collaboration
Tore Furevik, Director of the Nansen Centre adds: "Shubha Sathyendranath has helped change how we observe and understand the ocean. Through her work on ocean colour from satellites, she has contributed new knowledge about phytoplankton, primary production and the ocean's importance for the climate. She combines scientific excellence with a strong ability to build international collaboration and new generations of researchers."
Sathyendranath now chairs the International Ocean Colour Coordinating Committee and holds close to 300 scientific publications. Her work has been recognised with several international honours, including the Grande Médaille Albert I de Monaco, the Huntsman Award for Excellence in Marine Science, the UNESCO/IOC Panikkar Memorial Medal, the Order of Cultural Merit of Monaco, and membership of the Order of the British Empire.