Thread by @ProtectSlr

#Publication | #Subglacial #hydrology modulates basal sliding response of the #AntarcticIceSheet to climate forcing

🔗doi.org/10.5194/tc-16-…

👇THREAD!

We use a state of the art coupled 4 subglacial water representations and ice dynamics model to investigate their impact on the future contribution to global mean #SeaLevel of the #AntarcticIceSheet

The basal sliding law is the most controlling factor.
👉Subglacial hydrology and till deformation modulate basal sliding response of the Antarctic ice sheet to climate forcing.

However, subglacial hydrology reduces the effective pressure (N) in the grounding zone. Generally, this increases the ice sheet sensitivity, especially for extreme forcing scenarios (ABUMIP). This dependency is less clear under realistic forcing scenarios (ISMIP6).

Subglacial hydrological models reducing N values in grounding zones (HAB,SWD) increase ice sheet sensitivity to forcing. In the limit case, where N➡️0 at the grounding line (Tsai et al., 2015), sensitivity is largely increased and becomes independent on the type of sliding law.

by @Sainan_Sun @ViolaineCoulon @FrankPattyn