Greenland & Wild Labrador 2014 Aboard the Sea Adventurer
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The Concentration of in Situ 10Be in Fluvial Sediments As a Tool for Deciphering 6 My of Greenland Ice Sheet History from a Marine Sediment Core
THE CONCENTRATION OF IN SITU 10BE IN FLUVIAL SEDIMENTS AS A TOOL FOR DECIPHERING 6 MY OF GREENLAND ICE SHEET HISTORY FROM A MARINE SEDIMENT CORE A Progress Report By Alice Heller Nelson To The Faculty of the Geology Department Of The University of Vermont 4th of October 2012 Accepted by the Faculty of the Geology Department, the University of Vermont, in partial fulfillment of the requirements for the degree of Master of Science specializing in Geology. The following members of the Thesis Committee have read and approved this document before it was circulated to the faculty: _________________________ Chair Jason D. Stockwell, Ph.D. _________________________ Advisor Paul R. Bierman, Ph.D. _________________________ Andrea Lini, Ph.D. Date Accepted: ________________ I. Introduction 1.1. Motivation My research involves measuring the concentration of in situ 10Be in glacio- fluvial sediments from Greenland and an adjacent ocean sediment core spanning the past 6 Myr (Figure 1). Knowing the concentration of 10Be in modern continental sediment samples will help me interpret the down core record, which may provide a new way of estimating timing of Greenland Ice Sheet (GIS) inception and inferring past ice extent and erosivity. Linking this ice sheet variability with records of past climate change may help to determine thresholds for ice loss and regrowth, which is an important step towards predicting how the ice sheet might respond to future climate change. 1.2. Project Goals The first component of my research is to measure the 10Be concentration in sediment sourced from different places on the Greenlandic landscape. Ice shields rock from cosmic rays, so I expect sediments sourced from glaciated versus ice-free terrain will contain different amounts of 10Be and that sediments from different source areas will mix as they are transported through the landscape. -
Road Construction in Greenland – the Greenlandic Case
THIS PROJECT IS BEING PART-FINANCED BY THE EUROPEAN UNION EUROPEAN REGIONAL DEVELOPMENT FUND ROAD CONSTRUCTION IN GREENLAND – THE GREENLANDIC CASE October 2007 Arne Villumsen Anders Stuhr Jørgensen Abdel Barten Janne Fritt-Rasmussen Laust Løgstrup Niels Brock Niels Hoedeman Ragnhildur Gunnarsdóttir Sara Borre Thomas Ingeman-Nielsen ROAD CONSTRUCTION IN GREENLAND – THE GREENLANDIC CASE October 2007 Arne Villumsen Anders Stuhr Jørgensen Abdel Barten Janne Fritt-Rasmussen Laust Løgstrup Niels Brock Niels Hoedeman Ragnhildur Gunnarsdóttir Sara Borre Thomas Ingeman-Nielsen Translation: J. Richard Wilson CONTENTS 1. GEOLOGY, NatURE AND CLIMate OF GREENLAND ........................... 4 1.1. GEOLOGY. 4 1.2. CLIMate . .5 1.3. Weather AND CLIMate IN AND AROUND GREENLAND . .5 1.4. Precipitation . .5 1.5. Weather- AND CLIMate REGIONS IN GREENLAND . .6 1.6. PERMAFROST. .9 1.7. Vegetation. .10 2. Relevant INFORMation FOR ROAD-BUILDING PROJECTS IN GREENLAND ........................................................................................... 11 3. EXISTING ROADS IN towns AND VILLAGES IN GREENLAND ......... 17 3.1. EXAMination OF EXISTING ROADS IN towns AND VILLAGES IN GREENLAND. 19 3.1.1. ROADS IN SISIMIUT town. .19 3.1.2. SISIMIUT Airport . 19 3.1.3. THE ROAD FROM KANGERLUSSSUAQ to THE INLAND ICE. 20 3.1.4. KANGERLUSSUAQ Airport. 21 3.2. STUDIES OF ROADS ELSEWHERE IN GREENLAND. .22 3.2.1. SOUTH GREENLAND . 23 3.2.2. ILLORSUIT. .27 4. THE SISIMIUT-KANGERLUSSUAQ ROAD ............................................ 32 4.1. GEOLOGICAL AND GEOGRAPHICAL overview. .32 4.2. SUitable Materials FOR ROAD CONSTRUCTION AND PERMAFROST. .35 4.3. GEOLOGICAL MODEL FOR THE AREA. 39 4.4. SUMMARY. .55 4.5. ENVIRONMental AND conservation ASPECTS. .55 4.6. ROUTE PROPOSAL – GENERAL ASPECTS. -
AMERICAN MUSEUM NOVITATES Published by Number 895 the AMERICAN MUSEUM of NATURAL HISTORY Dec
AMERICAN MUSEUM NOVITATES Published by Number 895 THE AMERICAN MUSEUM OF NATURAL HISTORY Dec. 31 1936 New York City THE NEARCTIC ATYPIDAE By W. J. GERTSCH The curious spiders now comprising the Atypidae were set apart many years ago by various authors as representing a group which, though obviously closely related to the other mygalomorph species, was worthy of separation from them in some way, either as a genus, a sub- family, or a family. The genus Atypus dates from 1804, when Latreille used the name for the first time in a generic sense. Aranea subterranea Roemer, now placed as a synonym of Atypus piceus (Sulzer), was desig- nated as the genotype by this same author in 1810. Ausserer in his 'Beitrage zur Kenntniss der Arachniden-Familie der Territelariae' recognized a subfamily Atypinae, which name had been used pro- visionally by Thorell in 1869-1870, and included three generic cate- gories, Calommata Lucas, its synonym Pelecodon Doleschal, and Atypus Latreille. This author placed two of the American species in Atypus but erected the new genus Madognatha for Sphodros abbotii Walckenaer, assigning it to the subfamily Theraphosinae. The family name, Atypidae, was proposed by P. Bertkau in 1878 and was based on the characters presented in the German species of Atypus. A little later Thorell (1889-1890) divided his Territelariae into five families and for some reason substituted the name Calommatoidae for the Atypidae of Bertkau. In the 'Historie Naturelle des Araginees' Simon restored the name Atypidae and considerably enlarged the limits of the family by including twenty-four species representing six genera, and placed them in three subfamilies, the Brachybothrinae, Hexurinae, and Atypinae. -
Large Surface Meltwater Discharge from the Kangerlussuaq Sector Of
The Cryosphere, 6, 199–209, 2012 www.the-cryosphere.net/6/199/2012/ The Cryosphere doi:10.5194/tc-6-199-2012 © Author(s) 2012. CC Attribution 3.0 License. Large surface meltwater discharge from the Kangerlussuaq sector of the Greenland ice sheet during the record-warm year 2010 explained by detailed energy balance observations D. van As1, A. L. Hubbard2, B. Hasholt3, A. B. Mikkelsen3, M. R. van den Broeke4, and R. S. Fausto1 1Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 Copenhagen K, Denmark 2Institute of Geography and Earth Sciences, Aberystwyth University, Llandinam Building, Penglais Campus, Aberystwyth, SY23 3DB, Wales 3Department of Geography and Geology, Øster Voldgade 10, 1350 Copenhagen K, Denmark 4Institute for Marine and Atmospheric Research, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands Correspondence to: D. van As ([email protected]) Received: 15 August 2011 – Published in The Cryosphere Discuss.: 6 September 2011 Revised: 28 December 2011 – Accepted: 3 January 2012 – Published: 13 February 2012 Abstract. This study uses data from six on-ice weather sta- 1 Introduction tions, calibrated MODIS-derived albedo and proglacial river gauging measurements to drive and validate an energy bal- Greenland stores nearly three million cubic kilometres of ice, ance model. We aim to quantify the record-setting positive a large potential contribution to sea level rise. In recent years, temperature anomaly in 2010 and its effect on mass bal- increasingly large areas of the ice sheet have been losing ance and runoff from the Kangerlussuaq sector of the Green- mass, as determined from its satellite-derived gravity field ◦ land ice sheet. -
Vejprojekt Mellem Kangerlussuaq Og Sisimiut
Vej mellem Sisimiut og Kangerlussuaq Konsekvensanalyse af fordele og ulemper Sisimiut Kommune 1 Vej mellem Sisimiut og Kangerlussuaq Konsekvensanalyse af fordele og ulemper Udarbejdet af: Laust Løgstrup Naja Joelsen Anette G. Lings Inunnguaq Lyberth Peter Evaldsen Rasmus Frederiksen Klaus Georg Hansen Morten H. Johansen Finn E. Petterson Larseraq Skifte Sisimiut Kommune Marts 2003 2 Vej mellem Sisimiut og Kangerlussuaq - konsekvensanalyse af fordel og ulemper © Sisimiut Kommune Sisimiut marts 2003 Printet hos Sisimiut Kommune Printede eksemplarer af rapporten kan rekvireres ved henvendelse til: Sisimiut Kommune Postboks 1014 DK-3911 Sisimiut Grønland E-mail: [email protected] Rapporten kan også hentes som PDF-fil på adressen: http://www.sisimiut.gl/vej Redaktionen er afsluttet den 21. marts 2003. Mekanisk, fotografisk eller anden gengivelse af denne rapport eller dele af den er tilladt med angivelse af kilde. Fotoet på forsiden er fra Haines i Yukon i Canada og er venligst stillet til rådighed af Yukons Regering. 3 Indholdsfortegnelse INDHOLDSFORTEGNELSE.................................................................................................3 SAMMENDRAG ......................................................................................................................5 INDLEDNING ..........................................................................................................................9 BAGGRUND...............................................................................................................................9 -
GREENLAND Summer and Winter Adventures
GREENLAND summer and winter adventures Greenland summer and winter adventures 1 Greenland with Albatros Travel With a strong foothold in Kangerlussuaq, we can provide your clients with a seamless experience of Greenland. Three Table of decades ago, we were one of the first travel operators to venture into the arctic wilderness of Greenland. Today, we CONTENTS have cemented our presence there in the form of a local office, restaurant, gift shop and two hostels. 2 INTRODUCTION 4-5 YOUR GATEWAY TO GREEENLAND Find out more about our Greenland operations on page 4. 8-9 SHIP: OCEAN DIAMOND Why Albatros 6-7 SUMMER TOURS Greenland holds a special place in our hearts here at Albatros Travel. With headquarters 8-9 GREENLAND’S MAGICAL MIDNIGHT SUN in Copenhagen, Denmark, our connection to this vast continent is like that of all Danes. 10-11 MAGNIFICENT GREENLAND The joint history has been murky and at times dark. However, we are determined to show - ICE SHEET AND ICEBERGS guests from abroad how incredibly beautiful and untouched Greenland is. 12-13 SUMMER IN ICELAND AND ILULISSAT We cherish the wide, open spaces, the long, dark winters only brightened by the sparkling 14-15 TREASURES OF SOUTH GREENLAND snow, breathtaking northern lights (the aurora borealis), the short, and surprisingly green summers lit by the midnight sun, the seemingly endless icescapes and the warmth of the 16-17 WINTER TOURS Greenlandic people. Yes, the list is long and we could go on. 18-19 WINTER WONDERLAND IN GREENLAND We don’t just know Greenland’s history, the names of its birds, wildlife and its nature. -
Location Privacy Without Mutual Trust: the Spatial Bloom Filter
CORE Metadata, citation and similar papers at core.ac.uk Provided by Bournemouth University Research Online Location privacy without mutual trust: the Spatial Bloom Filter a, b a Luca Calderoni ∗, Paolo Palmieri , Dario Maio aDepartment of Computer Science and Engineering, University of Bologna, Cesena, FC, 47521 Italy bBournemouth University, Poole, Dorset, BH12 5BB, UK Abstract Location-aware applications are one of the biggest innovations brought by the smartphone era, and are effectively changing our everyday lives. But we are only starting to grasp the privacy risks associated with constant tracking of our whereabouts. In order to continue using location-based services in the future without compromising our privacy and security, we need new, privacy-friendly applications and protocols. In this paper, we propose a new compact data structure based on Bloom filters, designed to store location information. The Spatial Bloom Filter (SBF), as we call it, is designed with privacy in mind, and we prove it by presenting two private positioning protocols based on the new primitive. The protocols keep the user’s exact position private, but allow the provider of the service to learn when the user is close to specific points of interest, or inside predefined areas. At the same time, the points and areas of interest remain oblivious to the user. The two proposed protocols are aimed at different scenarios: a two-party setting, in which communication happens directly between the user and the service provider, and a three-party setting, in which the service provider outsources to a third party the communication with the user. A detailed evaluation of the efficiency and security of our solution shows that privacy can be achieved with minimal computational and communication overhead. -
Next Generation Space Defense May 2021
Next Generation Space Defense MilsatMagazineMilsatMagazine May 2021 Cover image: United Launch Alliance’s Delta IV Heavy rocket carrying the NROL-82 mission for the National Reconnaissance Office lifts off from Space Launch Complex-6 at Vandenberg Air Force Base in California. Image Source: United Launch Alliance Beyond Secure Satcoms Publishing OPeratiOns disPatChes Features Eutelsat + OneWeb .................................................. 4 How SATCOM Vastly Improves .............................. 12 Silvano Payne, Publisher + Executive Writer Small UAV Flexibility Simon Payne, Chief Technical Officer Author: Get SAT Hartley G. Lesser, Editorial Director ULA + NRO ............................................................... 6 Pattie Lesser, Executive Editor Donald McGee, Production Manager USSF/SMC + Raytheon I&S ...................................... 8 Teresa Sanderson, Operations Director Sean Payne, Business Development Manager Lockheed Martin ....................................................... 8 Dan Makinster, Technical Advisor High Availability Maritime SATCOM....................... 18 Starts On The Ship Space Flight Laboratory ......................................... 10 Author: Dr. Rowan Gilmore, EM Solutions seniOr COlumnists Virgin Orbit ............................................................ 11 and COntributOrs Hughes + OneWeb ................................................. 15 Delivering Mission-Critical Connectivity with ........ 28 Chris Forrester, Broadgate Publications Reliability and Resilience Loft Orbital -
Éditeur Officiel Du Québec Updated to August 1 2016 This Document Has Official Status
0 0 8 1 © Éditeur officiel du Québec Updated to August 1 2016 This document has official status. chapter R-20, r. 6.1 Regulation respecting the hiring and mobility of employees in the construction industry L A Act respecting labour relations, vocational training and workforce management in the construction industry B O(chapter R-20, s. 123.1, subpar. 13) RU 1O-R 2D.R eC0E TABLE OF CONTENTS c.L e1A m9 DIVISION I T DEFINITIONS.................................................................................................... 1 b4I e6O DIVISION II r-N DIVISION III 38S 02— DIVISION IV ,;C SO DIVISION V 1.N HIRING............................................................................................................... 35 8QS DIVISION VI 9.T GENERAL PROVISIONS.................................................................................. 40 91R 9U 9C 3T ,I cO .N 6— 1H ,I sR .I 7N 2G .A N D M O B I L I T Y Updated to 0August 01 2016 © Éditeur officiel8 du1 Québec R-20, r. 6.1 / 1 of 23 LABOUR RELATIONS — CONSTRUCTION — HIRING AND MOBILITY DIVISION I DEFINITIONS 1. In this Regulation, unless the context requires otherwise, “apprentice” means a person holding an apprentice competency certificate issued under the Regulation respecting the issuance of competency certificates (chapter R-20, r. 5); “remote site” means a site inaccessible by a passable road connected to the roads network of the Province of Québec and the James Bay region; “graduate” means a person with a secondary school diploma granted for one of the construction trades and issued by an institution recognized by the Ministère de l’Éducation, du Loisir et du Sport; “remote area” means an area inaccessible by a passable road connected to the roads network of the Province of Québec, and an island situated along the St. -
Validation of Globsnow-2 Snow Water Equivalent Over Eastern Canada
1 Validation of GlobSnow-2 snow water equivalent over 2 Eastern Canada 3 Fanny Larue1,2,3, Alain Royer1,2, Danielle De Sève3, Alexandre Langlois1,2, Alexandre 4 Roy1,2 and Ludovic Brucker4,5 5 1 Centre d’Applications et de Recherches en Télédétection, Université de Sherbrooke, 6 Sherbrooke, Québec, Canada 7 2 Centre for Northern Studies, Québec, Canada 8 3 IREQ Hydro-Québec, Varenne, Québec, Canada 9 4 NASA GSFC, Cryospheric Sciences Laboratory, Greenbelt, MD 20771, USA 10 5 Universities Space Research Association, Goddard Earth Sciences Technology and Research 11 Studies and Investigations, Columbia, MD 21044, USA 12 13 * Correspondance: Fanny Larue, CARTEL, Département de Géomatique Appliquée, 14 Université de Sherbrooke, 2500 Blvd. de l’Université, Sherbrooke, QC J1K 2R1, Canada. 15 E-mail address: [email protected] 16 17 Abstract: In Québec, Eastern Canada, snowmelt runoff contributes more than 30% of 18 the annual energy reserve for hydroelectricity production, and uncertainties in annual 19 maximum snow water equivalent (SWE) over the region are one of the main 20 constraints for improved hydrological forecasting. Current satellite-based methods for 21 mapping SWE over Québec's main hydropower basins do not meet Hydro-Québec 22 operational requirements for SWE accuracies with less than 15% error. This paper 23 assesses the accuracy of the GlobSnow-2 (GS-2) SWE product, which combines 24 microwave satellite data and in situ measurements, for hydrological applications in 25 Québec. GS-2 SWE values for a 30-year period (1980 to 2009) were compared with 26 space- and time-matched values from a comprehensive dataset of in situ SWE 27 measurements (a total of 38 990 observations in Eastern Canada). -
Why Should We Care About Greenland Watersheds? Reactions, Runoff, and Rising Sea Level
Why should we care about Greenland watersheds? Reactions, runoff, and rising sea level Jon Martin Ellen Martin Cecilia Scribner Kelly Deuerling Daniel Collazo Adam Marshall Greenland Watersheds Subglacial Proglacial Deglacial Subglacial Proglacial Deglacial Water Melt water Modified from system discharged Water from annual Anderson, 2007, under the from the ice precipitation and Ann. Rev. Earth permafrost melt ice sheet Planet Sci Significance: Watershed Variations ~20ky Now Last Glacial Maximum Mostly deglacial All sub- & pro-glacial Much weathered material Much fresh material Implication 1: Sea level rise • Spectacular events: – (MWP1A) 14.5 – 14.0 ka BP > 40 mm/yr – Reflect rapid collapse of continental ice sheets • Change in the material fluxes: – To ocean: isotopes & nutrients (?) – With atmosphere: CO2 Forward in time Lambeck et al., 2014, PNAS Implication 2: Runoff (and fluxes) • Systematic shifts in Pb isotopes in North Atlantic sediments: Sea level – Rapid increase during rapid SL rise Orphan knoll – Gradual drift down following SL rise Laurentian Fan • Reflect changes in Blake Ridge runoff composition (reactions) Lambeck et al., 2014, PNAS; Gutjahr et al., 2009, EPSL; Kurzweil et al., 2010, EPSL; Crocket et al., 2012 Implications 3: Reactions Large D values • Offset between whole rock and leached material Small D – Represent weathering values products • Offset increases with younger material Large D • Causes: values – Change in minerals being weathered (Sr) – Availability of radiogenic Small D isotopes in damaged values crystal lattices (Pb) Upper: Harlavan et al., 1998, GCA; Lower: Blum and Erel, 1997, GCA Hypotheses • Hypothesis 1: • Weathering Laurentian Fan, North Atlantic extent/products should vary across watershed types • Hypothesis 2: • Solutes in addition to Pb should vary with Kurzweil et al. -
A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland
A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland Vermassen, Flor; Bjørk, Anders A.; Sicre, Marie Alexandrine; Jaeger, John M.; Wangner, David J.; Kjeldsen, Kristian K.; Siggaard-Andersen, Marie Louise; Klein, Vincent; Mouginot, Jeremie; Kjær, Kurt H.; Andresen, Camilla S. Published in: Geophysical Research Letters DOI: 10.1029/2019GL085954 Publication date: 2020 Document version Publisher's PDF, also known as Version of record Document license: CC BY Citation for published version (APA): Vermassen, F., Bjørk, A. A., Sicre, M. A., Jaeger, J. M., Wangner, D. J., Kjeldsen, K. K., Siggaard-Andersen, M. L., Klein, V., Mouginot, J., Kjær, K. H., & Andresen, C. S. (2020). A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland. Geophysical Research Letters, 47(4), [e2019GL085954]. https://doi.org/10.1029/2019GL085954 Download date: 04. okt.. 2021 RESEARCH LETTER A Major Collapse of Kangerlussuaq Glacier's Ice Tongue 10.1029/2019GL085954 Between 1932 and 1933 in East Greenland Key Points: Flor Vermassen1,2 , Anders A. Bjørk2 , Marie‐Alexandrine Sicre3, John M. Jaeger4, • Historical evidence reveals a major 1,2 1 2 collapse of Kangerlussuaq Glacier's David J. Wangner , Kristian K. Kjeldsen , Marie‐Louise Siggaard‐Andersen , ice tongue between 1932 and 1933 Vincent Klein3, Jeremie Mouginot5,6 , Kurt H. Kjær2, and Camilla S. Andresen1 • The collapse was likely triggered by increasing air and ocean 1Department of Glaciology and Climate, GEUS, Copenhagen, Denmark,