Dr. Kunal Chakraborty is recognized for his outstanding and sustained contributions to ocean science, particularly in marine biogeochemistry, ecosystem modeling, and their societal applications. He is internationally acclaimed for pioneering research that has advanced scientific understanding of the Indian Ocean’s biogeochemical evolution across both short- and long-term timescales. His research has been instrumental in revealing the complex linkages between ocean physics and ecosystem functioning, particularly under conditions of environmental change. Dr. Chakraborty developed a high-resolution, coupled ocean-ecosystem model that has been incorporated into the Regional Carbon Cycle Assessment and Processes Phase 2 (RECCAPv2) assessment, where it outperformed many existing models in accurately reproducing Indian Ocean carbon dynamics. To address persistent observational gaps, he has pioneered the integration of dynamical modeling with artificial intelligence and machine learning. By combining all available observations he has produced high-resolution estimates of air-sea carbon dioxide fluxes, advancing understanding of ocean carbon cycling, ocean acidification, and regional processes in the Indian Ocean. His research also supports ocean forecasting and advisory services, guiding fisheries toward efficient practices, reduced fuel use, and lower emissions, contributing directly to sustainable development goals and the U.N. Decade of Ocean Science. Beyond his scientific excellence, Dr. Chakraborty has supervised eight Ph.D. scholars and mentored 27 marine science students. He serves as a faculty member at a United Nations Educational, Scientific and Cultural Organization Category 2 training center, the International Training Centre for Operational Oceanography at the Indian National Center for Ocean Information Services, advancing equitable access to marine science education in underrepresented and developing regions. He actively promotes science outreach through the Indian National Science Academy’s Science & Society Programme, inspiring students and educators in rural and underserved areas, and upholds scientific integrity through his service on editorial boards and as a reviewer for leading journals, including those of AGU. Dr. Chakraborty is an active contributor to major international collaborations such as the Global Ocean Acidification Observing Network, OceanPredict’s Marine Ecosystem Analysis and Prediction Task Team, the RECCAPv2 initiative of the Global Carbon Project, and the World Climate Research Programme’s Working Group on Observations for Researching Climate. Through these efforts, he ensures that Indian science contributes meaningfully to global climate governance under the U.N. Decade of Ocean Science. As a regular associate of the Abdus Salam International Centre for Theoretical Physics and a leader in international collaboration, he advances ocean science and scientific diplomacy. Through his pioneering research, leadership, outreach, and commitment to mentoring, Dr. Chakraborty has significantly advanced ocean science and its applications, and we are thankful for his exceptional contributions to the global scientific community. —Swadhin Behera, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan