How dynamic are ice-stream beds?

first_imgProjections of sea-level rise contributions from West Antarctica’s dynamically thinning ice streams contain high uncertainty because some of the key processes involved are extremely challenging to observe. An especially poorly observed parameter is sub-decadal stability of ice-stream beds. Only two previous studies have made repeated geophysical measurements of ice-stream beds at the same locations in different years, but both studies were limited in spatial extent. Here, we present the results from repeat radar measurements of the bed of Pine Island Glacier, West Antarctica, conducted 3–6 years apart, along a cumulative ~ 60 km of profiles. Analysis of the correlation of bed picks between repeat surveys show that 90 % of the ice-stream bed displays no significant change despite the glacier increasing in speed by up to 40 % over the last decade. We attribute the negligible detection of morphological change at the bed of Pine Island Glacier to the ubiquitous presence of a deforming till layer, wherein sediment transport is in steady state, such that sediment is transported along the basal interface without inducing morphological change to the radar-sounded bed. Significant change was only detected in one 500 m section of the bed where a change in bed morphology occurs with a difference in vertical amplitude of 3–5 m. Given the precision of our measurements, the maximum possible erosion rate that could go undetected along our profiles is 500 mm a-1, far exceeding erosion rates reported for glacial settings from proglacial sediment yields, but substantially below subglacial erosion rates of 1000 mm a-1 previously reported from repeat geophysical surveys in West Antarctica.last_img read more

Watch Butch & Derek Trucks, Oteil & Kofi Burbridge, Jimmy Herring, John Popper Perform As Frogwings At Wetlands In 1999

first_imgFrogwings existed in the mid-1990s and early-2000s as a jam band staple. It was drummer Butch Trucks‘ side-project outside of the Allman Brothers Band, that brought together his nephew guitarist Derek Trucks and members of Aquarium Rescue Unit Jimmy Herring, Oteil Burbridge, and Kofi Burbridge together before Derek and Oteil would go on to join Butch and Marc Quiñones in the Allman Brothers Band.The group had a few different variations, with vocalist Edwin McCain starting out with the band before going off and succumbing to his own industry fame. Blues Travelers’ John Popper was his replacement, tying the knot for what would become one of the best jam bands those times were capable of.The band name came from a quote from Duane Allman, “If a frog had wings, he wouldn’t bump his ass when he jumped.” And thus, continuing on to preach the sermon of Duane Allmanism, Butch named this band after so.Frogwings performed two nights at the Wetlands Preserve in February of 1999, featuring guitarist Warren Haynes on night one. Watch full-show videos of both nights below:Frogwings – 2/9/99Frogwings – 2/10/99[Videos: Kevin Tobin]Setlist: Frogwings | Wetlands Preserve | New York City, NY | 2/19/1999I: Kickin’ J.S. Bach, Wetlands Shuffle, Hurdy Gurdy Fandango, Feel For You, PatternII: Cut Mullet, Among Your Pillows, Just One, Ganja, Deviant Dreams, Nomad, Hot Lanta **w/Warren HaynesSetlist: Frogwings | Wetlands Preserve | New York City, NY | 2/10/1999I: Kickin’ J.S. Bach, Wetlands Shuffle, Hurdy Gurdy Fandango, Feel For You, PatternII: Cut Mullet, Among Your Pillows, Just One, Ganja, ??, Superstition, Nomadlast_img read more

The Temptations & The Four Tops Set for Broadway

first_imgGet ready for more Motown! Two legendary Motown groups will join forces on Broadway for one week only. The Temptations and The Four Tops will play the Palace Theatre from December 29 through January 4, 2015 for seven performances, celebrating their 50-year career of classic hits. The Temptations started in the early ‘60s in Detroit and rose to fame in 1964 with “The Way You Do The Things You Do.” They became the first Motown group to win a Grammy—for “Cloud Nine” in 1969. They won again in 1973 for “Papa Was a Rollin’ Stone” and in 2001 for the album Ear-Resistable. Last year, they were honored with the Grammy Lifetime Achievement Award. The Temptations singers currently consist of founding member Otis Williams, as well as Ron Tyson, Terry Weeks, Joe Herndon and Bruce Williamson. The Temptations and The Four Tops Both The Temptations and The Four Tops are portrayed on stage in the Broadway musical Motown. View Commentscenter_img Related Shows The Four Tops began as Four Aims in 1956 under Chess Records, singing everything from pop, to blues, to Broadway and jazz. The quartet’s “Baby I Need Your Loving” marked their first Motown hit in 1964; it was soon followed by such chart-toppers as “I Can’t Help Myself (Sugar Pie, Honey Bunch),” “It’s The Same Old Song” and “”Reach Out I’ll Be There.” They were inducted into the Rock and Roll Hall of Fame in 1990 and received the 2009 Grammy Lifetime Achievement Award. Original member Abdul “Duke” Fakir is joined by Ronnie McNeir, Harold Bonhart and Lawrence Payton, Jr. Show Closed This production ended its run on Jan. 4, 2015last_img read more