Potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets

first_imgWe use the Shreve hydraulic potential equation as a simplified approach to investigate potential subglacial lake locations and meltwater drainage pathways beneath the Antarctic and Greenland ice sheets. We validate the method by demonstrating its ability to recall the locations of >60% of the known subglacial lakes beneath the Antarctic Ice Sheet. This is despite uncertainty in the ice-sheet bed elevation and our simplified modelling approach. However, we predict many more lakes than are observed. Hence we suggest that thousands of subglacial lakes remain to be found. Applying our technique to the Greenland Ice Sheet, where very few subglacial lakes have so far been observed, recalls 1607 potential lake locations, covering 1.2% of the bed. Our results will therefore provide suitable targets for geophysical surveys aimed at identifying lakes beneath Greenland. We also apply the technique to modelled past ice-sheet configurations and find that during deglaciation both ice sheets likely had more subglacial lakes at their beds. These lakes, inherited from past ice-sheet configurations, would not form under current surface conditions, but are able to persist, suggesting a retreating ice-sheet will have many more subglacial lakes than advancing ones. We also investigate subglacial drainage pathways of the present-day and former Greenland and Antarctic ice sheets. Key sectors of the ice sheets, such as the Siple Coast (Antarctica) and NE Greenland Ice Stream system, are suggested to have been susceptible to subglacial drainage switching. We discuss how our results impact our understanding of meltwater drainage, basal lubrication and ice-stream formation.last_img read more

Assimilation of sea surface temperature, sea ice concentration and sea ice drift in a model of the Southern Ocean

first_imgCurrent ocean models have relatively large errors and biases in the Southern Ocean. The aim of this study is to provide a reanalysis from 1985 to 2006 assimilating sea surface temperature, sea ice concentration and sea ice drift. In the following it is also shown how surface winds in the Southern Ocean can be improved using sea ice drift estimated from infrared radiometers. Such satellite observations are available since the late seventies and have the potential to improve the wind forcing before more direct measurements of winds over the ocean are available using scatterometry in the late nineties. The model results are compared to the assimilated data and to independent measurements (the World Ocean Database 2009 and the mean dynamic topography based on observations). The overall improvement of the assimilation is quantified, in particular the impact of the assimilation on the representation of the polar front is discussed. Finally a method to identify model errors in the Antarctic sea ice area is proposed based on Model Output Statistics techniques using a series of potential predictors. This approach provides new directions for model improvements.last_img read more

USOC moves to take over USA Gymnastics in wake of sexual abuse scandal

first_img Written by FacebookTwitterLinkedInEmailiStock/Thinkstock(NEW YORK) — The U.S. Olympic Committee is seeking to revoke USA Gymnastics’ status as a member of the national governing body.The move comes in the wake of the sex abuse scandal involving USA Gymnastics national team doctor Larry Nassar, who was sentenced to up to 175 years in prison earlier this year. In a statement Monday, USOC CEO Sarah Hirshland said the decision was “not a conclusion that we have come to easily.”“In the short-term, we have to work to ensure that USAG gymnasts have the support necessary to excel on and off the field of play. We are building plans to do just that,” Hirshland said. “In the long-term, it will be the critically important responsibility of the recognized Gymnastics NGB, whether the existing organization or a new one, to lead gymnastics in the United States and build on the supportive community of athletes and clubs that can carry the sport forward for decades to come. We are prepared to identify and help build such an organization,” she added.Copyright © 2018, ABC Radio. All rights reserved. November 6, 2018 /Sports News – National USOC moves to take over USA Gymnastics in wake of sexual abuse scandalcenter_img Beau Lundlast_img read more

SPS-JHSV 15 Commences in Honduras

first_img July 22, 2015 SPS-JHSV 15 Commences in Honduras Authorities View post tag: Navy View post tag: americas View post tag: SPS-JHSV 15 Back to overview,Home naval-today SPS-JHSV 15 Commences in Honduras center_img Share this article View post tag: Honduras View post tag: News by topic Joint forces arrive in Honduras, July 12, in support of Southern Partnership Station-Joint High Speed Vessel 2015 (SPS-JHSV 15).SPS-JHSV 15 is a joint force comprised of adapted forces including divers, explosive ordnance disposal (EOD) technicians, corpsmen, Seabees, intel personnel, preventive medicine specialists, and communication specialists, from the Navy, Marines, Army and Air Force.Through subject matter expert exchanges (SMEE), construction projects and medical engagements with the host nation’s military personnel and civilians, Southern Partnership Station is able to create strong ties between the U.S and its partners.SPS-JHSV is an annual series of U.S. Navy deployments, fostering a lasting relationship with host nations by promoting and enhancing regional stability and security through the sharing experiences.Southern Partnership Station’s primary objectives are countering illicit trafficking, theater security cooperation, and building partner capacity through subject matter expert exchanges, construction projects and medical engagements with the host nations’ military and civilian personnel. SPS-JHSV 15 ashore forces will be traveling to Honduras, Belize, Guatemala and Columbia.This mission exemplifies the U.S. commitment to cooperative partnership in the Caribbean, Central and South America.[mappress mapid=”16540″]Image: US Navy View post tag: Navallast_img read more

CHANNEL 44 NEWS: Mayor Winnecke Talks About the Growth of Evansville

first_imgMayor Winnecke Talks About the Growth of EvansvilleFrom a laundry list of downtown developments to new transportation services to the ongoing fight against blight. In his sixth State of the City Address, Mayor Lloyd Winnecke touched on all that happened during his time in office. He said there is…FacebookTwitterCopy LinkEmailSharelast_img

Modest Mouse Plays An Old-School Show At A Sold-Out Denver’s Fillmore Auditorium [Photos]

first_imgLoad remaining images On Tuesday night, the alt-rock legends Modest Mouse took to the Fillmore Auditorium in Denver, Colorado, for a walk-down memory lane for the many fans who packed into the venue, many of which who have been following the group since their inception in 1992. While the group most recently released the critically acclaimed Strangers To Ourselves back in 2015, the group’s setlist primarily focused on crowd pleasers from their earlier discography, such as 2004’s Good News For People Who Love Bad News, 2000’s The Moon & Antartica, and appropriate for the Colorado show, 1997’s The Lonesome Crowded West, including one of the highlights of the night “Doin’ The Cockroach” off The Lonesome Crowded West. You can check out photos from last night’s Modest Mouse performance in Denver below, courtesy of photographer Andrew Rios.last_img read more

New lifestyles for Stone Hall

first_imgSince students moved back into Quincy House’s Stone Hall in August, after 15 months of construction, they have explored and utilized the new academic, social, and study spaces in creative ways.“What’s special about Harvard is there is a lot of learning that goes on in the classroom, but it doesn’t end there. I can go to a lecture on the history of Western music and when I come back here to Stone Hall and walk past the music practice room I can hear a piece by Mozart that we just talked about in class,” said Sarah Ward ’16.“One of the things I am most impressed with about Stone Hall is the diversity of community spaces we have here available to us,” Ward said. “There are alcoves for quiet study and bigger study spaces where you can work together as a group, or just hang out. They’ve really provided space for any kind of need we would have, whether it be an academic need or a social need.”In a few short months, Stone Hall has shown how House renewal will provide undergraduates with an array of improved spaces, each designed to better support learning, exploration, relaxation, and fun.The new smart classroom and the Rothenberg Conference Room are hosting about half a dozen classes this semester alone. The new music practice rooms, study alcoves, and the Kates/Tobin Community Room have proven popular for study, as well as for gatherings.  Residents also have benefited from modern amenities in their rooms.“It’s Harvard’s nature to think about the students and the need of the students, but to also maintain tradition. So I love the fact they kept the architecture and kept the old keys, but it’s a new space that’s conducive to what students need today,” said Vanessa Martinez ’16. “I really think they kept all the students in mind with all the decisions that went into this.”Harvard’s residential Houses — where undergraduates, graduate students, and faculty live, eat, work, and learn together — are the foundation of the College experience. As multigenerational communities, each House provides residents with an intellectual as well as a physical home.  The House renewal program is designed to ensure that each House can best support the learning and living needs of modern students.One of the largest capital improvement projects in the College’s history, House renewal is guided by five principles: preserving the historic character of the Houses; invigorating House life; connecting spaces and nurturing community; providing modern accommodations and sustainable operations; and accommodating the future.Leverett’s McKinlock Hall, the second test project, is currently under construction and scheduled to be completed when students arrive for the fall 2014 term. Construction on Dunster, the first full House to undergo renewal, will begin after Commencement in the spring. Faculty of Arts and Sciences Dean Michael D. Smith recently announced that the renewal of Winthrop House will follow the completion of Dunster.last_img read more

South Dayton Man Charged In Identity Theft Case

first_imgShare:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to email this to a friend (Opens in new window) Pixabay Stock Image.SOUTH DAYTON – A South Dayton man faces several charges following an investigation into identity theft, according to the Cattaraugus County Sheriff’s Office. Deputies say Joseph Gierszewski, 26, was arrested at his 37 Main St. residence Tuesday afternoon. Gierszewski allegedly used the credit/debit card information of another person without their permission to make online purchases worth $1,300 on or around Feb. 16.Deputies allege Gierszewski possessed around 3.8 grams of methamphetamine during his arrest. He is charged with fourth-degree grand larceny, second-degree identity theft and seventh-degree criminal possession of a controlled substance.Gierszewski was taken to the Cattaraugus County Sheriff office where he was processed and issued an appearance ticket to appear in the Village of South Dayton court on March 19 at 7:30pm. last_img read more

Bird battle

first_imgBy Stephanie SchupskaUniversity of GeorgiaThey look like pinecones with feet. But the baby quail, pheasants and chukar partridges that wobble around the University of Georgia poultry science farm in Athens will help save game birds everywhere.Coccidia parasites can decimate a generation of farm-raised birds. In Pennsylvania, Wisconsin, Illinois and Iowa, where large numbers of pheasants and chukars are raised, farmers report a 50 percent loss in severe outbreaks, said Larry McDougald, a poultry parasitologist with the UGA College of Agricultural and Environmental Sciences.Birds that survive an outbreak typically don’t grow as large as uninfected birds. McDougald has spent 30 years studying coccidiosis, the disease caused by coccidia, in chickens and turkeys. “The problem with parasites was brought under control in chickens,” he said. He now wants to help game birds. And the North American Game Bird Association and the Midwest Poultry Consortium have provided funding to control the parasites in their industry, he said.Just like dogs and cats get sick from different germs than humans, different parasites affect different kinds of birds. A vaccine developed to fight coccidiosis in a chicken, for example, wouldn’t help pheasants, chukars or quail.But a vaccine developed for each of these top game birds would work. It would also save farmers money. McDougald and molecular biologist Robert Beckstead, also with CAES, are guessing that each bird will have two to three important parasites.A vaccine is the long-term goal. The first step in their work will be to identify which coccidia are most deadly for quail, pheasants and chukars. They will then identify parasite-controlling drugs for more short-term relief.To do the testing, they’re using technology Beckstead is an expert in – polymerized chain reaction. It can quickly identify the parasites they’re seeing in the field.“Until now, the only way to tell was to infect a bird,” Beckstead said. “Through PCR, we’re reducing times and also reducing the number of birds used in the study.”By developing vaccines and treatments to control parasites in farm-raised birds, they can also help reduce the potential for wild birds to become contaminated with coccidiosis, Beckstead said.The UGA researchers are getting help from undergraduate and graduate UGA students, a veterinary scholar from Iowa State University and two high school students in the summer Young Scholars Program. Researchers from North Dakota State University, Iowa State and Pennsylvania State University will send samples and help with grant applications.Georgia farmers don’t raise many pheasants or chukars. But they do raise quail. Last year, farm-raised quail production in Georgia was worth $31 million, four times more than it was seven years ago, according to the recent UGA Georgia Farm Gate Value Report. The jump is due to the decline of the wild quail population, which has faded in recent decades because of land development and reduction of their habitat.The birds are raised for specialty food markets as well as hunting.“Game birds are a growing industry,” McDougald said. “Some people are raising several million birds per year. They get more for those than for chickens. It’s a good cash crop.” (Stephanie Schupska is a news editor with the University of Georgia College of Agricultural and Environmental Sciences.)last_img read more