Projected impacts of Antarctic meltwater anomalies over the 21st Century ...

• Main Authors: Purich, Ariaan, England, Matthew
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; Southern Ocean; Antarc*; Ice Sheet; Sea ice
• Online Access: https://dx.doi.org/10.57757/iugg23-3656; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020886

<!--!introduction!--> Southern Ocean surface freshening has been observed in recent decades and is projected to continue over the 21st Century. Surface freshening due to precipitation and sea ice changes are represented in coupled climate models, however Antarctic ice sheet/shelf meltwater contributions are not. As Antarctic melting is projected to accelerate over the 21st Century this constitutes a fundamental shortcoming in present-day projections of high-latitude climate. Southern Ocean surface freshening has been shown to cause a surface cooling by reducing both ocean convection and the entrainment of warm subsurface waters to the surface. Over the 21st Century Antarctic meltwater is expected to alter the pattern of projected surface warming as well as having other climatic effects. However, there remains considerable uncertainty in projected Antarctic meltwater amounts, and previous findings could be model-dependent. Here, we use the ACCESS-ESM1.5 coupled model to investigate global climate ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...