Crevasse advection increases glacier calving

Abstract Iceberg calving, the process where icebergs detach from glaciers, remains poorly understood. Moreover, few parameterizations of calving can easily be integrated into numerical models to accurately capture observations, resulting in large uncertainties projected sea level rise. Recent efforts have focused on estimating crevasse depths assuming tensile failure occurs when crevasses fully penetrate glacier thickness. However, these approaches often ignore role advecting calculations depth. Here, we examine a more general depth model that includes advection. We apply this idealized prograde and retrograde bed geometries as well geometry with sill. Neglecting advection results steady advance ice tongue formation for all temperatures, sliding law coefficients constant slope considered. In contrast, suppresses increases rates, leading retreat. Furthermore, allows grounded front stabilize top sills. These suggest radically alter rates hint future fracture need carefully consider lifecycle plays process.