Spatial Variability and Biogeochemical Implications of Seawater Carbonate Chemistry in an Upwelling Filament of the Benguela Upwelling System from High-Resolution Underway Measurements

durch Li Qiu

Mittwoch 18.06.2025, 13:00 → 14:30 Europe/Berlin

8A-002 - Hörsaal Ostufer / Lecture Hall East (GEOMAR - Standort Ostufer / GEOMAR - East Shore)

Given the widespread occurrence of filaments in upwelling systems and other coastal regions, their influence on carbonate chemistry should be explicitly accounted for in regional carbon budgets and global biogeochemical models to improve understanding of oceanic carbon dynamics. Capturing these influences requires high-temporal and high-spatial resolution observations. Our objective was to develop a filament-scale analytical framework using high-resolution underway measurements to explore the specific impacts of filaments on seawater carbonate chemistry. Based on high-resolution measurements obtained from a series of sensors, we were able to show carbonate chemistry variations along and across the filament and the driver mechanisms behind them. By calculating air-sea flux, we were able to show CO₂ emissions of upwelling filaments.