the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Evaporative controls on Antarctic precipitation: an ECHAM6 model study using innovative water tracer diagnostics
Qinggang Gao
Louise C. Sime
Alison J. McLaren
Thomas J. Bracegirdle
Emilie Capron
Rachael H. Rhodes
Hans Christian Steen-Larsen
Xiaoxu Shi
Martin Werner
Related authors
For 1 century, the hemispheric summer insolation is proposed as a key pacemaker of astronomical climate change. However, an increasing number of geologic records reveal that the low-latitude hydrological cycle shows asynchronous precessional evolutions that are very often out of phase with the summer insolation. Here, we propose that the astronomically driven low-latitude hydrological cycle is not paced by summer insolation but by shifting perihelion.
Related subject area
In Antarctica, supraglacial lakes often form near grounding lines due to surface melting. We model viscoelastic tidal flexure in these regions to assess its contribution to lake drainage via hydrofracturing. Results show that tidal flexure and lake-water pressure jointly control drainage near unconfined grounding lines. Sensitivity analysis indicates the importance of the Maxwell time of ice in modulating the tidal response.
We investigated the influence of several regional climate models on the Antarctic Ice Sheet when applied as forcing for the Parallel Ice Sheet Model (PISM). Our study shows that the choice of regional climate model forcing results in uncertainties of around a tenth of those in future sea level rise projections and also affects the extent of grounding line retreat in West Antarctica.