The Antarctic Ice Sheet's response to idealised geoengineering scenarios ...

• Main Authors: Adhikari, Mira, Martin, Daniel F., Edwards, Tamsin, Payne, Antony J., O'Neill, James
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Antarctic; The Antarctic; Antarc*; Ice Sheet
• Online Access: https://dx.doi.org/10.57757/iugg23-2914; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018967

<!--!introduction!--> Sea level will continue to rise beyond the 22 nd century due to inertia in the climate system, even if temperatures were immediately stabilised, leading to the proposal of more dramatic measures, such as geoengineering. To provide initial sea level contribution (SLC) estimates from the AIS and address long-term commitment and reversibility questions, a set of idealized geoengineering scenarios were performed with the BISICLES ice sheet model. Climate forcings were extended beyond 2100 to 2200 by either fixing the climate at 2100 (2050) levels at the end (middle) of the century (commitment scenarios), or immediately returning to 2015 levels (e.g. via an instantaneous implementation of geoengineering). Results show that for both high (RCP8.5) and low (RCP2.6) forcing scenarios, reverting back to 2015 climate does not prevent significant loss from the AIS. However, if geoengineering methods are adopted in 2050, SLC is lower than in the commitment scenarios. If geoengineering is ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...