Detecting rift basins in the Evans Ice Stream region of West Antarctica using airborne gravity data

first_imgA total of 11,500 line km of aerogravity data have been used to construct an free-air gravity anomaly map for the Antarctic region that may contain the microplate boundary between the Haag Nunataks block and southern Antarctic Peninsula. Along-line free-air gravity anomaly data resolved wavelengths of 9 km or greater with better than 5 mGal accuracy. Coincident radio echo soundings provided data to construct a digital terrain model. The gravity effect of the terrain was calculated by Gauss-Legendre quadrature (GLQ) and spectrally correlated with the free-air gravity data. Terrain-correlated free-air anomalies related to possible isostatic imbalances of the crust were separated from terrain-decorrelated anomalies that may reflect intra-crustal density contrasts. Subtracting terrain-correlated free-air anomalies from the gravity effects of the terrain yielded compensated terrain gravity effects (CTGE) that were used to model the Moho by inversion. The results indicate moderate but significant crustal thinning below the Evans Ice Stream that is consistent with an extensional origin for the deep, wide, steep-sided trough that contains the ice stream as well as the continued elevation of the footwall flank of the basin, Changes along the axis of the rift, both in the gravity anomaly field and the distribution of Moho topography, can be explained by processes associated with continental lithospheric extension. Subsequently, many of the features produced by extension have been modified by glacial erosion and the sub-ice topography and gravity data reflect this.last_img read more

Bogdanovic’s 28 leads Jazz past injury-depleted Cavaliers

first_img FacebookTwitterLinkedInEmailCLEVELAND (AP) — Bojan Bogdanovic scored 28 points, Rudy Gobert added 20 and the Utah Jazz began a four-game trip with a 126-113 win over the short-handed Cavaliers.Cleveland dressed only nine players because of injuries and used just seven.Donovan Mitchell added 17 points for the Jazz. Utah was flat for long stretches against Cleveland’s depleted roster. The Jazz didn’t put the Cavs away until midway through the final quarter, when Bogdanovic hit a pair of 3-pointers.Collin Sexton scored a career-high 32 points for the Cavs. Tags: Bojan Bogdanovich/NBA/Utah Jazz March 2, 2020 /Sports News – Local Bogdanovic’s 28 leads Jazz past injury-depleted Cavaliers Written by Associated Presslast_img read more

Center for the Environment welcomes new cohort of environmental fellows

first_imgHUCE extends a warm welcome to its newest cohort of environmental fellows, who will join a current group of scholars embarking on their second year of the program. Now in its fifth season, the fellows program recruits a diverse group of intellectually-curious, top-achieving scholars to tackle complex environmental challenges in a wide array of disciplines.Each of the six incoming fellows will work closely with a faculty mentor during their two-year stint at Harvard, in addition to attending a variety of group meetings, faculty-led discussions, and the center’s environmental fellows dinner series.Returning for their final year of the program are fellows Daniel Barber, Jacob Krich, Elizabeth Landis, Alexander Stine, and Rich Wildman. For more information on the program.The 2011 environmental fellows are Emily V. Fischer, an atmospheric chemist; Chris Golden, an ecologist and epidemiologist; Francis Ludlow, a historical climatologist; Fabien Paulot, an atmospheric chemist; Jenny Suckale, a geophysicist; and Hillary Young, a community ecologist. Read Full Storylast_img read more