02348nas a2200253   4500008004100000022001400041245009900055210006900154260001200223300001100235520137700246653002501623653001901648653002401667653003201691653001701723100002601740700002401766700002501790700002501815700003201840700002001872856020201892       2023                        eng d  a0022-143000aMeteorological drivers of melt at two nearby glaciers in the McMurdo Dry Valleys of Antarctica0 aMeteorological drivers of melt at two nearby glaciers in the McM  c12/2023  a1 - 133 a<p>We study the meteorological drivers of melt at two glaciers in Taylor Valley, Antarctica, using 22 years of weather station observations and surface energy fluxes. The glaciers are located only 30 km apart, but have different local climates; Taylor Glacier is generally drier and windier than Commonwealth Glacier, which receives more snowfall due to its proximity to the coast. Commonwealth Glacier shows more inter-annual melt variability, explained by variable albedo due to summer snowfall events. A significant increase in surface melt at Commonwealth Glacier is associated with a decrease in summer minimum albedo. Inter-annual variability in melt at both glaciers is linked to degree-days above freezing during föhn events, occurring more frequently at Taylor Glacier. At Taylor Glacier melt occurs most often with positive air temperatures, but föhn conditions also favour sublimation, which cools the surface and prevents melt for the majority of the positive air temperatures. At Commonwealth Glacier, most of the melt instead occurs with sub-zero air temperatures, driven by strong solar radiative heating. Future melt at Taylor Glacier will likely be more sensitive to changes in föhn events, while Commonwealth Glacier will be impacted more by changes in near coastal weather, where moisture inputs can drive cloud cover, snowfall and change albedo.</p>10aAntarctic glaciology10aenergy balance10aglacier meteorology10aice/atmosphere interactions10amelt-surface1 aHofsteenge, Marte, G.1 aCullen, Nicolas, J.1 aConway, Jonathan, P.1 aReijmer, Carleen, H.1 avan den Broeke, Michiel, R.1 aKaturji, Marwan  uhttps://www.cambridge.org/core/journals/journal-of-glaciology/article/meteorological-drivers-of-melt-at-two-nearby-glaciers-in-the-mcmurdo-dry-valleys-of-antarctica/2B8ED17DEC26AB5F0905BC4C7ACA02FA02112nas a2200229   4500008004100000245006600041210006600107260001200173490000700185520130800192653001901500653001901519653002001538653002301558653001301581100002801594700002201622700002201644700002401666700002301690856016901713       2020                        eng d00aModeling present and future ice covers in two Antarctic lakes0 aModeling present and future ice covers in two Antarctic lakes  c02/20200 v663 a<p>Antarctic lakes with perennial ice covers provide the opportunity to investigate in-lake processes without direct atmospheric interaction, and to study their ice-cover sensitivity to climate condi- tions. In this study, a numerical model &ndash; driven by radiative, atmospheric and turbulent heat fluxes from the water body beneath the ice cover &ndash; was implemented to investigate the impact of climate change on the ice covers from two Antarctic lakes: west lobe of Lake Bonney (WLB) and Crooked Lake. Model results agreed well with measured ice thicknesses of both lakes (WLB &ndash; RMSE= 0.11 m over 16 years of data; Crooked Lake &ndash; RMSE= 0.07 m over 1 year of data), and had acceptable results with measured ablation data at WLB (RMSE= 0.28 m over 6 years). The differences between measured and modeled ablation occurred because the model does not consider interannual variability of the ice optical properties and seasonal changes of the lake&rsquo;s thermal structure. Results indicate that projected summer air temperatures will increase the ice-cover annual melting in WLB by 2050, but that the ice cover will remain peren- nial through the end of this century. Contrarily, at Crooked Lake the ice cover becomes ephem- eral most likely due to the increase in air temperatures.</p>10aclimate change10aenergy balance10aice and climate10aice-sheet modeling10alake ice1 aEcheverría, Sebastián1 aHausner, Mark, B.1 aBambach, Nicolás1 aVicuña, Sebastián1 aSuárez, Francisco  uhttps://www.cambridge.org/core/journals/journal-of-glaciology/article/modeling-present-and-future-ice-covers-in-two-antarctic-lakes/9306439ADD5492BC05F3BAF0E076B1C3