The recent disintegration of Antarctic Peninsula ice shelves, and the associated accelerated discharge and retreat of continental glaciers, has highlighted the necessity of quantifying the current rate of Antarctic ice mass loss and the regional contributions to future sea-level rise. Observations of present day ice mass change need to be corrected for ongoing glacial isostatic adjustment, a process which must be constrained by geological data. However, there are relatively little geological data on the geometry, volume and melt history of the Antarctic Peninsula Ice Sheet (APIS) after Termination 1, and during the Holocene so the glacial isostatic correction remains poorly constrained. To address this we provide field constraints on the timing and rate of APIS deglaciation, and changes in relative sea-level (RSL) for the north-eastern Antarctic Peninsula based on geomorphological evidence of former marine limits, and radiocarbon-dated marine-freshwater transitions from a series of isolation basins at different altitudes on Beak Island. Relative sea-level fell from a maximum of c. 15 m above present at c. 8000 cal yr BP, at a rate of 3.91 mm yr−1 declining to c. 2.11 mm yr−1 between c. 6900–2900 cal yr BP, 1.63 mm yr−1 between c. 2900–1800 cal yr BP, and finally to 0.29 mm yr−1 during the last c. 1800 years. The new Beak Island RSL curve improves the spatial coverage of RSL data in the Antarctic. It is in broad agreement with some glacio-isostatic adjustment models applied to this location, and with work undertaken elsewhere on the Antarctic Peninsula. These geological and RSL constraints from Beak Island imply significant thinning of the north-eastern APIS by the early Holocene. Further, they provide key data for the glacial isostatic correction required by satellite-derived gravity measurements of contemporary ice mass loss, which can be used to better assess the future contribution of the APIS to rising sea-levels.
[Video: Roy Loeffler]Setlist: Brain Damaged Eggmen | Resonance Music Festival | Legend Valley, OH | 9/21/2018Set: Sgt. Peppers Lonely Heart’s Club Band, Mean Mister Mustard > Polythene Pam > She Came In Through The Bathroom Window > Baby You’re A Rich Man* > Dear Prudence, I Am The Walrus > I’ve Got A Feeling, In The Flesh Part 1 > Run Like Hell > Have A Cigar > Young Lust, Comfortably Numb, Brain Damage* with Nick Gerlach on saxophone[H/T Jambase] At Resonance Music & Arts Festival in September, members of Umphrey’s McGee and The Disco Biscuits revived their long-inactive side project, Brain Damaged Eggmen. The rare all-star supergroup finds Brendan Bayliss, Jake Cinninger, and Kris Myers of Umphrey’s McGee and Marc Brownstein and Aron Magner of The Disco Biscuits joining forces to pay tribute to two iconic rock-and-roll outfits, Pink Floyd and The Beatles.The long-running spinoff band’s special performance at Resonance Music & Arts Festival this year marked Brain Damaged Eggmen’s first performance since 2012, when the band performed at Summer Camp Music Festival after an unofficial hiatus spanning six years. After debuting on Jam Cruise in 2006, the Umphrey’s McGee/Disco Biscuits tribute to The Beatles and Pink Floyd was particularly active from 2006 to 2008 before more or less dropping off the map, save for rare performances in the years since. As noted during the set’s official announcement, last month’s show at Resonance will be the project’s only performance in 2018.During Brain Damaged Eggmen’s set at Resonance, the all-star collaboration tended to focus on The Beatles’ songbook for the first half of the show. The group kicked things off with “Sgt. Pepper’s Lonely Heart’s Club Band”, using it as a launching point to run through a number of Abbey Road tunes, including “Mean Mister Mustard”, “Polythene Pam”, and “She Came In Through The Bathroom Window” before saxophonist Nick Gerlach emerged to aid the ensemble on “Baby You’re A Rich Man” from Magical Mystery Tour. After classics like “Dear Prudence” and “I Am The Walrus”, Brain Damaged Eggmen finished off their Beatles portion with a rendition of “I’ve Got A Feeling” before transitioning into the Pink Floyd portion of the performance.After a brief pause following “I’ve Got A Feeling”, the Umphrey’s McGee/Disco Biscuits collaboration kicked off their Pink Floyd tunes with “In Tthe Flest Part 1”, marking the start of a well-segued run through four fan-favorite Floyd songs. From there, the band worked through “Rull Like Hell”, “Have A Cigar”, and “Young Lust” before finishing off their performance with “Comfortably Numb” and “Brain Damage”.You can watch the full the performance below, courtesy of Roy Loeffler.