DOCSLIB.ORG

CNC/IUGG: 2019 Quadrennial Report

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
CNC/IUGG: 2019 Quadrennial Report CNC/IUGG: 2019 Quadrennial Report Geodesy and Geophysics in Canada 2015-2019 Quadrennial Report of the Canadian National Committee for the International Union of Geodesy and Geophysics Prepared on the Occasion of the 27th General Assembly of the IUGG Montreal, Canada July 2019 INTRODUCTION This report summarizes the research carried out in Canada in the fields of geodesy and geophysics during the quadrennial 2015-2019. It was prepared under the direction of the Canadian National Committee for the International Union of Geodesy and Geophysics (CNC/IUGG). The CNC/IUGG is administered by the Canadian Geophysical Union, in consultation with the Canadian Meteorological and Oceanographic Society and other Canadian scientific organizations, including the Canadian Association of Physicists, the Geological Association of Canada, and the Canadian Institute of Geomatics. The IUGG adhering organization for Canada is the National Research Council of Canada. Among other duties, the CNC/IUGG is responsible for: • collecting and reconciling the many views of the constituent Canadian scientific community on relevant issues • identifying, representing, and promoting the capabilities and distinctive competence of the community on the international stage • enhancing the depth and breadth of the participation of the community in the activities and events of the IUGG and related organizations • establishing the mechanisms for communicating to the community the views of the IUGG and information about the activities of the IUGG. The aim of this report is to communicate to both the Canadian and international scientific communities the research areas and research progress that has been achieved in geodesy and geophysics over the last four years. The main body of this report is divided into eight sections: one for each of the eight major scientific disciplines as represented by the eight sister societies of the IUGG. Each section is titled with the name of the corresponding society and was complied by, and under the direction of, a member of the CNC/IUGG affiliated with that society. In the interest of compiling and disseminating this report in a timely fashion, no attempt has been made to harmonize the styles of the different sections. The full text of the report is only available electronically. It is available through the web site of the CNC/IUGG at: http://www.cgu-ugc.ca/cnc_iugg/ MEMBERS of the CNC/IUGG Chair of the CNC/IUGG and Nationally Accredited Council Delegate: Dr. Gordon Young; 225 Ricardo St., unit 312, Niagara on the Lake, Ontario, L0S 1J0 +1 905 468 5896; [email protected] Representatives for Scientific Associations: International Association of Geodesy (IAG) Dr. Jeong Woo University of Calgary, Dept. of T: 1 403 220 4858 KIM Geomatic Engineering, 2500 F: 1 403 284 1980 (National Rep) University Drive NW, Calgary, AB, [email protected] T2N 1N4 Dr. Georgia Queen’s University, Dept. of T: 1 613 533 6639 FOTOPOULOS Geological Sciences and Geological [email protected] (Alternate) Engineering, 36 Union Street, Miller Hall/Bruce Wing Kingston, Ontario, K7L 3N6 International Association of Geomagnetism and Aeronomy (IAGA) Dr. Phil J. A. University of Western Ontario T: 1 519 661 2111 Ex. McCAUSLAND Dept. of Earth Sciences 88008 (National Rep) 1151 Richmond Str., London, ON, F: 1 519 661 3198 N6A 5B7 [email protected] Dr. David I.U.C. Physics/Admin, T: 1-506-453-4998 THEMENS 209, Department of [email protected] (Alternate) Physics, University of New Brunswick, P.O. Box 4400, Fredericton, N.B., E3B 5A3 International Association of Hydrological Sciences (IAHS) Dr. Richard University of Waterloo, Dept. of T: 1 519 888 4567 Ex. PETRONE Geography and Environmental 39174 (National Rep) Management, 200 University Ave W, [email protected] Waterloo, ON, N2L 3G1 Dr. Genevieve ALI University of Guelph, School of T: 1 519 824 4120, ex (Alternate) Environmental Sciences, 50 Stone 52740 Road East, Guelph, Ontario, N1G [email protected] 2W1, Canada International Association of Meteorology and Atmospheric Sciences (IAMAS) Dr. Paul University of Toronto, Department T:1 416-946-3683 KUSHNER of Physics, 60 St. George St., paul.kushner@utoronto. (National Rep) Toronto, ON M5S 1X7 ca Dr. Tim MERLIS McGill University, Atmospheric and T: 1 514 398-3140 (Alternate) Climate Dynamics, 815 Burnside [email protected] Hall, 805 Sherbrooke Street West, Montreal, QC H3A 0B9, Canada International Association of Physical Sciences of the Ocean (IAPSO) Dr. Jody KLYMAK University of Victoria T: 1 250 472 5969 (National Rep) School of Earth Sciences and Ocean F: 1 250 721 6200 Sciences, P.O. Box 3055 STN CSC, [email protected] Victoria, BC, V8W 3P6 Dr. Peter Maurice Lamontagne Institute, Dept. T: 1 418 775 0852 GALBRAITH of Fisheries and Oceans, Pelagic and Peter.Galbraith@dfo- (Alternate) Ecosystem Science Branch mpo.gc.ca P.O. Box 1000, Mont-Joli QC, G5H 3Z4 International Association of Seismology and Physics of the Earth’s Interior (IASPEI) Dr. Fiona Université du Québec à Montréal, T: 1 514 987 3000 Ex. DARBYSHIRE Département des Sciences de la 5054 (National Rep) Terre et de l’Atmosphère, CP 888 darbyshire.fiona_ann@u Succursale Centre-Ville, Montré al, qam.ca QC, H3C 3P8 Dr. Sheri University of Western Ontario T: 1 514 661 2111 Ex. MOLNAR Dept. Earth Sciences (Geophysics) 87031 (Alternate) 1151 Richmond St. N London, ON, [email protected] N6A 5B7 International Association of Vulcanology and Chemistry of the Earth’s Interior (IAVCEI) Dr. Glyn Simon Fraser University, Dept. of T: 1 778 782 3306 WILLIAMS-JONES Earth Sciences, 8888 University [email protected] (National Rep) Drive, Burnaby, British Columbia, V5A 186 Dr. Nathalie Douglas College, Dept. of Earth and T: 1 604 527 5860 VIGOUROUX Environmental Sciences, PO Box vigourouxcaillibotn@do (Alternate) 2503, New Westminster, BC, V3L uglascollege.ca 5B2 International Association of Cryospheric Sciences (IACS) Dr. Richard University of Waterloo, Dept. of T: 1 519 888 4567 Ex. KELLY Geography & Environmental 35451 (National Rep) Management , 200 University Ave. [email protected] W., Waterloo, ON, N2L 3G1 Dr. Randy University of Victoria, Department T: 1 250-853-3577 SCHARIEN of Geography, PO Box 1700, Stn CSC, [email protected] (Alternate) Victoria, BC, V8W 2Y2 Member of the Bureau of IUGG 2015-2019 Dr Michael Sideris, President, IUGG Department of Geomatics Engineering University of Calgary 2500 University Drive N.W. Calgary, AB T2N 1N4 Canada. REPORTS of the ASSOCIATIONS Section 1 International Association of Geodesy (IAG) Activities in Canada: 2014 – 2018 This report was compiled by Georgia Fotopoulos, Department of Geological Sciences and Geological Engineering, Queen’s University, Kingston, Ontario, Canada as the Canadian national correspondent for the IAG. The following institutions have provided input for this report: • Natural Resources Canada, Canadian Geodetic Survey • University of Calgary, Department of Geomatics Engineering • York University, Department of Earth and Space Science and Engineering • Ryerson University, Department of Civil Engineering • Queen’s University, Department of Geological Sciences and Geological Engineering • University of Laval, Department of Geomatics Sciences • University of New Brunswick, Department of Geodesy and Geomatics Engineering 1. List of Researchers and Research Interests Natural Resources Canada, Canadian Geodetic Survey Status as Research Interests Employee Name of 2018- 12-01 Dr. Simon BANVILLE GNSS, Precise Point Positioning Mario BERUBE (Retired) GNSS, VLBI GNSS, RTK Networks, Applications of Dr. Jason BOND Geodesy GNSS, Real-Time Wide Area Marc CAISSY Augmentation GNSS, Real-Time Wide Area Paul COLLINS Augmentation Reference Frames, Geodynamics, Dr. Mike CRAYMER Applications of Geodynamics Gravimetry, Applications in Dr. John CROWLEY Hydrosphere/Cryosphere GNSS, Reference Frames, Applications Brian DONAHUE of Geodesy GHODDOUSI- GNSS, Ionosphere Dr. Reza FARD Dr. Ali GOUDARZI GNSS, Precise orbit Determination Dr. Joe HENTON GNSS, Geodynamics, Seismic Strain Pierre HEROUX (Retired) GNSS, Precise Point Positioning Dr. Geoid modelling, Gravimetry Jianliang HUANG Gravity, Gravity applications in Diane JOBIN resource development GNSS, Precise Point Positioning, Dr. Omid KAMALI Precise orbit Determination Dr. Calvin KLATT Geodetic Applications Dr. Jan KOUBA (Retired) GNSS, Precise Point Positioning Francois LAHAYE GNSS, Precise Point Positioning Ken MACLEOD GNSS Antenna Calibration GNSS Precise Orbit and Clock Yves MIREAULT determination Goran PAVLIC Gravity, Applications of Gravity Dr. Bill PETRACHENKO (Retired) VLBI Dr. Mike PIRASZEWSKI Reference Frames, Geodynamics Dr. Reference Frames, Geodynamics Catherine ROBIN Toni SEARLE (Retired) GNSS, Precise Point Positioning, VLBI Jason SILLIKER Gravity, Applications of Gravity Pierre TETREAULT GNSS Marc VERONNEAU Geoid, Gravity, Applications of Gravity Dr. Yanlai ZHAO Reference Frames, Geodynamics University of Calgary, Department of Geomatics Engineering Name Research Interests Prof. Michael G. Sideris Gravity field approximation, industrial surveys, geoid determination Dr. Elena Rangelova Geodesy, surveying engineering York University, Department of Earth and Space Science and Engineering Name Research Interests Prof. Spiros Pagiatakis Earth system dynamics, gravity field determination, Earth’s atmosphere using GNSS/LEO Prof. Sunil Bisnath GNSS, positioning and navigation, PPP, geodesy Ryerson University, Department of Civil Engineering Name Research Interests Prof. Ahmed El-Rabbany GNSS, multi-sensor integration, mobile
Load more

Recommended publications
  • Taylor University Catalog 1916
    Taylor University Pillars at Taylor University Undergraduate Catalogs Taylor University Catalogs 1916 Taylor University Catalog 1916 Taylor University Follow this and additional works at: https://pillars.taylor.edu/catalogs Part of the Higher Education Commons Recommended Citation Taylor University, "Taylor University Catalog 1916" (1916). Undergraduate Catalogs. 93. https://pillars.taylor.edu/catalogs/93 This Book is brought to you for free and open access by the Taylor University Catalogs at Pillars at Taylor University. It has been accepted for inclusion in Undergraduate Catalogs by an authorized administrator of Pillars at Taylor University. For more information, please contact [email protected]. Tavlor University' BULLETIN UPLAND. INDIANA 1 9 1 () 1-3 < K H K c < K VOL. 8 MAY. 1916 NO. 1 Taylor University BULLETIN TERMS OPEN September 20, 1916 December 27, 1916 March 21, 1917 CATALOG NUMBER 1915-1916 ANNOUNCEMENT for 1916-1917 MAY 1916 UPLAND, INDIANA Entered as Second Class Matter at Upland, Indiana, April 8th, 1909, Under Act of Congress of July 16, 1894. ... GALENBAR FOR 1916 JULY AUGUST SEPTEMBER 1 .. .. 12 3 4 5 1 2 2 3 4 5 6 7 8 6 7 8 9 10 11 12 3 4 5 6 7 8 9 9 10 11 12 13 14 15 13 14 15 16 17 18 19 10 11 12 13 14 15 16 16 17 18 19 20 21-22 20 21 22 23 24 25 26 17 18 19 20 21 22 23 23 24 25 26 27 28 29 27 28 29 30 31 . 24 25 26 27 28 29 30 30 31 OCTOBEK NOVEMBER DECEMBER 12 3 4 5 6 7 12 3 4 1 2 8 9 10 11 12 13 14 5 6 7 8 9 10 11 3 4 5 6 7 8 9 15 16 17 18 19 20 21 12 13 14 15 16 17 18 10 11 12 13 14 15 16 22 23 24 25 26 27 28 19 20 21 22 23 24 25 17 18 19 20 21 22 23 29 30 31 26 27 28 29 30 .
    [Show full text]
  • The Method of Gauss-Newton to Compute Power Series Solutions of Polynomial Homotopies∗
    The Method of Gauss-Newton to Compute Power Series Solutions of Polynomial Homotopies∗ Nathan Bliss Jan Verschelde University of Illinois at Chicago Department of Mathematics, Statistics, and Computer Science 851 S. Morgan Street (m/c 249), Chicago, IL 60607-7045, USA fnbliss2,[email protected] Abstract We consider the extension of the method of Gauss-Newton from com- plex floating-point arithmetic to the field of truncated power series with complex floating-point coefficients. With linearization we formulate a lin- ear system where the coefficient matrix is a series with matrix coefficients, and provide a characterization for when the matrix series is regular based on the algebraic variety of an augmented system. The structure of the lin- ear system leads to a block triangular system. In the regular case, solving the linear system is equivalent to solving a Hermite interpolation problem. In general, we solve a Hermite-Laurent interpolation problem, via a lower triangular echelon form on the coefficient matrix. We show that this solu- tion has cost cubic in the problem size. With a few illustrative examples, we demonstrate the application to polynomial homotopy continuation. Key words and phrases. Linearization, Gauss-Newton, Hermite inter- polation, polynomial homotopy, power series. 1 Introduction 1.1 Preliminaries A polynomial homotopy is a family of polynomial systems which depend on one parameter. Numerical continuation methods to track solution paths defined by a homotopy are classical, see e.g.: [3] and [23]. Our goal is to improve the algorithms to track solution paths in two ways: ∗This material is based upon work supported by the National Science Foundation under Grant No.
    [Show full text]
  • Results of the Alpha-Particle-X-Ray Spectrometer on Board of the Mars Exploration Rovers
    Lunar and Planetary Science XXXVI (2005) 1997.pdf Results of the Alpha-Particle-X-ray Spectrometer on Board of the Mars Exploration Rovers. R.Gellert1, J. Zipfel1, J.Brückner1, G. Dreibus1, G. Lugmair1, R. Rieder1, H. Wänke1, G. Klingelhöfer2, B. C. Clark3, D. W. Ming4, A. Yen5, S. Squyres6, and the Athena Science Team, 1Max-Planck-Institut für Chemie, J. J. Becher Weg 27, D-55128 Mainz, Germany, e-mail: [email protected], 2Instit. f. Anorgan. Analyt. Chemie, Univ. of Mainz, Germany, 3Lockheed Martin Corp., Littleton, CO, USA, 4Johnson Space Center, Houston, TX, USA 5Jet Propulsion Lab., Pasadena, CA, USA, 6Center f. Radiophys. Space Res., Cornell University, Ithaca, NY, USA. Overview: The Mars Exploration Rovers Spirit ments during a 3 km traverse showed no significant and Opportunity landed at Gusev crater and Meridiani change although the local rocks are different (Fig. 1). Planum [1]. The Alpha Particle X-ray Spectrometer Meridiani outcrop: Composition of outcrop rocks (APXS) is part of the instrument suite on both rovers exposed in three impact craters at Meridiani Planum [2]. It is equipped with six 244Cm sources which pro- was investigated. Most analyses were taken after rock vide x-ray excitation with alpha-particles (PIXE) and surfaces were abraded in order to eliminate surface x-ray radiation (XRF). This combination allows x-ray contamination. These rocks have a relatively uniform spectroscopy of elements from Na to Br in the energy composition, characterized by a very high S content, range of 0.9 to 16 keV. X-ray detectors with a high assumed to be SO3.
    [Show full text]
  • October 2003 SOCIETY
    ISSN 0739-4934 NEWSLETTER HISTORY OF SCIENCE VOLUME 32 NUMBER 4 October 2003 SOCIETY those with no interest in botany, the simple beauty of the glass is enough. Natural History Delights in Cambridge From modern-life in glass to long-ago life, it’s only a short walk. The museum houses ant to discuss dinosaurs, explore microfossils of some of the Earth’s earliest life Wancient civilizations, learn wild- forms, as well as fossil fish and dinosaurs – flower gardening, or study endangered such as the second ever described Triceratops, species? If variety is the spice of life, then and the world’s only mounted Kronosaurus, a the twenty-one million specimens at the 42-foot-long prehistoric marine reptile. Harvard Museum of Natural History show a Among its 90,000 zoological specimens the museum bursting with life, much of it unnat- museum also has the pheasants once owned urally natural. by George Washington. And many of the The museum will be the site of the opening mammal collections were put together in the reception for the 2003 HSS annual meeting. 19th century by “lions” in the history of sci- The reception begins at 7 p.m. Thursday, 20 ence, like Louis Agassiz. November, and tickets will be available at the Much of the museum’s collection of rocks and meeting registration desk. Buses will run from ores is the result of field work, but the museum the host hotel to the museum. houses not only that which has been dug up, but The Harvard MNH is an ideal spot for his- also that which has fallen out of the sky.
    [Show full text]
  • Pingualuit Crater Lake): Diatom Inferred Paleoenvironmental Record for Three Previous Interglacial Periods
    THE “CRYSTAL EYE OF NUNAVIK” (PINGUALUIT CRATER LAKE): DIATOM INFERRED PALEOENVIRONMENTAL RECORD FOR THREE PREVIOUS INTERGLACIAL PERIODS 1,2Jessica L. Black, 1Sonja Hausmann, 2Reinhard Pienitz, 3Veli-Pekka Salonen, 4Guillame St-Onge, 5Michel Bouchard, 6Laura Cunningham, 7Pierre Francus, and 8Michel Lamothe 1Department of Geosciences, University of Arkansas, 113 Ozark Hall, Fayetteville, AR 72701, [email protected], 2Université Laval, Québec, G1V 0A6, Canada, 3Department of Geology, Univ of Helsinki, P.O. BOX 64, Helsinki, FIN-00014, Finland, 4ISMER/GEOTOP, University of Quebec at Rimouski, Rimouski, QC G5L 3A1, Canada, 5Centre des Technologies de l'Environment de Tunis (CITET), Université de Montréal, Montréal, QC H3T 1J4, Canada, 6Abisko Scientific Research Station, Umea University, Abisko, SE-981 07, Sweden, 7Centre Eau, Terre et Environnement, Institut national de la recherche scientifique, 490 rue de la couronne, Québec, QC G1K 9A9, Canada 8Département des sciences de la Terre et de l’Atmosphère, Université du Québec à Montréal, CP 8888 Centre-ville, Montréal, QC H3C 3P8, Canada The sediments of the 1.4. Ma old Pingualuit Crater Lake known as the “Crystal Eye of Nunavik” offer the unique opportunity to study terrestrial climate dynamics not only during the postglacial period, but over several hundreds of thousands of years as its deep sediment infill yields an uninterrupted arctic paleoclimate record. The Pingualuit meteoritic crater (Nunavik, Canada; 61o17' N, 73o41' W) is located in the northernmost part of the Ungava Peninsula in northern Quebec - close to the area where the Laurentide Ice Sheet reached maximum thickness during the last (Wisconsinan) glaciation. In May, 2007 ~10 m of sediments was recovered from the crater lake at a water depth of 270 m using a UWITEC piston percussion corer system.
    [Show full text]
  • Approximate Newton's Method for Tomographic Image Reconstruction
    Approximate Newton's method for Tomographic Image Reconstruction Yao Xie Reports for EE 391 Fall 2007 { 2008 December 14, 2007 Abstract In this report we solved a regularized maximum likelihood (ML) image reconstruction problem (with Poisson noise). We considered the gradient descent method, exact Newton's method, pre-conditioned conjugate gradient (CG) method, and an approximate Newton's method, with which we can solve a million variable problem. However, the current version of approximate Newton's method converges slow. We could possibly improve by ¯nding a better approximate to the Hessian matrix, and still easy to compute its inverse. 1 Introduction Deterministic Filtered backprojection (FBP) and regularized Maximum-Likelihood(ML) es- timation are two major approaches to transmission tomography image reconstruction, such as CT [KS88]. Though the latter method typically yields higher image quality, its practical application is yet limited by its high computational cost (0.02 second per image for FBP versus several hours per image for ML-based method). This study works towards solving large scale ML imaging problem. We consider several versions of the Newton's algorithm, including an approximate Newton's method. We tested our methods on one simulated example and one real data set. Our method works, but converges relatively slow. One possible remedy is to ¯nd a better approximation to the Hessian matrix. 2 Problem Formulation We consider a computed tomographic (CT) system. The object to be imaged is a square region, which we divide into an n £n array of square pixels. The pixels are indexded column 1 ¯rst, by a single index i ranging from 1 to n2.
    [Show full text]
  • Deep-Sea Life Issue 8, November 2016 Cruise News Going Deep: Deepwater Exploration of the Marianas by the Okeanos Explorer
    Deep-Sea Life Issue 8, November 2016 Welcome to the eighth edition of Deep-Sea Life: an informal publication about current affairs in the world of deep-sea biology. Once again we have a wealth of contributions from our fellow colleagues to enjoy concerning their current projects, news, meetings, cruises, new publications and so on. The cruise news section is particularly well-endowed this issue which is wonderful to see, with voyages of exploration from four of our five oceans from the Arctic, spanning north east, west, mid and south Atlantic, the north-west Pacific, and the Indian Ocean. Just imagine when all those data are in OBIS via the new deep-sea node…! (see page 24 for more information on this). The photo of the issue makes me smile. Angelika Brandt from the University of Hamburg, has been at sea once more with her happy-looking team! And no wonder they look so pleased with themselves; they have collected a wonderful array of life from one of the very deepest areas of our ocean in order to figure out more about the distribution of these abyssal organisms, and the factors that may limit their distribution within this region. Read more about the mission and their goals on page 5. I always appreciate feedback regarding any aspect of the publication, so that it may be improved as we go forward. Please circulate to your colleagues and students who may have an interest in life in the deep, and have them contact me if they wish to be placed on the mailing list for this publication.
    [Show full text]
  • On the Use of Neural Networks to Solve Differential Equations Alberto García Molina
    Máster Universitario en Modelización e Investigación Matemática, Estadística y Computación 2019/2020 Trabajo Fin de Máster On the use of Neural Networks to solve Differential Equations Alberto García Molina Tutor/es Carlos Gorria Corres Lugar y fecha de presentación prevista 12 de Octubre del 2020 Abstract English. Artificial neural networks are parametric models, generally adjusted to solve regression and classification problem. For a long time, a question has laid around regarding the possibility of using these types of models to approximate the solutions of initial and boundary value problems, as a means for numerical integration. Recent improvements in deep-learning have made this approach much attainable, and integration methods based on training (fitting) artificial neural networks have begin to spring, motivated mostly by their mesh-free natureand scalability to high dimensions. In this work, we go all the way from the most basic elements, such as the definition of artificial neural networks and well-posedness of the problems, to solving several linear and quasi-linear PDEs using this approach. Throughout this work we explain general theory concerning artificial neural networks, including topics such as vanishing gradients, non-convex optimization or regularization, and we adapt them to better suite the initial and boundary value problems nature. Some of the original contributions in this work include: an analysis of the vanishing gradient problem with respect to the input derivatives, a custom regularization technique based on the network’s parameters derivatives, and a method to rescale the subgradients of the multi-objective of the loss function used to optimize the network. Spanish. Las redes neuronales son modelos paramétricos generalmente usados para resolver problemas de regresiones y clasificación.
    [Show full text]
  • Deglacial and Postglacial Evolution of the Pingualuit Crater Lake Basin, Northern Québec (Canada)
    Geomorphology 248 (2015) 327–343 Contents lists available at ScienceDirect Geomorphology journal homepage: www.elsevier.com/locate/geomorph Deglacial and postglacial evolution of the Pingualuit Crater Lake basin, northern Québec (Canada) Pierre-Arnaud Desiage a,b,⁎, Patrick Lajeunesse b,c, Guillaume St-Onge a,b, Alexandre Normandeau b, Grégoire Ledoux c,HervéGuyarda,b,d, Reinhard Pienitz c a Institut des sciences de la mer de Rimouski (ISMER), Canada Research Chair in Marine Geology, Université du Québec à Rimouski, Rimouski, Canada b GEOTOP Research Center, Canada c Centre d'études Nordiques (CEN) & Département de Géographie, Université Laval, Québec, Canada d Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR CNRS 7154, Paris, France article info abstract Article history: The Pingualuit Crater, located in the Ungava Peninsula (northern Québec, Canada) is a 1.4-Ma-old impact crater Received 15 January 2015 hosting a ~245-m-deep lake. The lake has a great potential to preserve unique paleoclimatic and paleoecological Received in revised form 9 July 2015 sedimentary records of the last glacial/interglacial cycles in the terrestrial Canadian Arctic. In order to investigate Accepted 10 July 2015 the stratigraphy in the lake and the late Quaternary glacial history of the Pingualuit Crater, this study compiles Available online 29 July 2015 data from three expeditions carried out in May 2007 (~9-m-long sediment core), in August 2010 (~50 km of seismic lines), and in September 2012 (high-resolution terrestrial LiDAR topography of the inner slopes). Despite Keywords: fi lake levels the weak penetration (~10 m) of the 3.5-kHz subbottom pro ling caused by the presence of boulders in the Mass movements sedimentary column, seismic data coupled with the stratigraphy established from the sediment core enabled Laurentide Ice Sheet the identification of two glaciolacustrine units deposited during the final stages of the Laurentide Ice Sheet Sedimentological processes (LIS) retreat in the crater.
    [Show full text]
  • Results of Recent Sediment Drilling Activities in Deep Crater Lakes
    of the subtropical region of South Ameri- beyond the instrumental record, as well del Puerto, L, García-Rodríguez, F., Inda H., Bracco, R., Castiñeira, C., J.B. and Adams, J.B., 2006: Paleolimnological evidence of Holocene ca (i.e., the transition between the tropics as to design new strategies for the sus- paleoclimatic changes in Lake Blanca, southern Uruguay, Journal and the extra tropics) in deciphering the tainable development of ecosystems and of Paleolimnology, 36: 151-163. forcing factors of past changes in atmo- natural resources. García-Rodríguez, F., 2006: Inferring paleosalinity changes using the chrysophyte cyst to diatom ratio in coastal shallow temperate/ spheric circulation. Both Argentinean and subtropical lagoons influenced by sea level changes, Journal of Uruguayan Holocene paleolimnologi- Acknowledgements Paleolimnology, 36,165-173. PEDECIBA, SNI-ANII and CSIC-Program Piovano, E., Ariztegui, D., Bernasconi, S.M. and McKenzie, J.A., 2004: cal records indicate similar paleoclimatic Stable isotopic record of hydrological changes in subtropical trends, i.e. dominant dry conditions were “Contratación de investigadores provenientes Laguna Mar Chiquita (Argentina) over the last 230 years, The del exterior” (Uruguay) are thanked for finan- observed during cold phases, whereas Holocene, 14(4): 525-535. cial support. Part of this study was supported Piovano, E.L., Ariztegui, D., Córdoba, F., Cioccale, M. and Sylvestre, F., wet conditions prevailed during warm by Argentina through funding of CONICET (PIP 2009: Hydrological variability in South America below the Tropic climatic phases. To our knowledge, this is 5947; PIP 112-200801-00808), FONCYT (PICT Nº of Capricorn (Pampas and Patagonia, Argentina) during the last 13.0 In: Vimeux, F.
    [Show full text]
  • 9–22–00 Vol. 65 No. 185 Friday Sept. 22, 2000 Pages 57277–57536
    9±22±00 Friday Vol. 65 No. 185 Sept. 22, 2000 Pages 57277±57536 VerDate 11-MAY-2000 19:36 Sep 21, 2000 Jkt 190000 PO 00000 Frm 00001 Fmt 4710 Sfmt 4710 E:\FR\FM\22SEWS.LOC pfrm11 PsN: 22SEWS 1 II Federal Register / Vol. 65, No. 185 / Friday, September 22, 2000 The FEDERAL REGISTER is published daily, Monday through SUBSCRIPTIONS AND COPIES Friday, except official holidays, by the Office of the Federal Register, National Archives and Records Administration, PUBLIC Washington, DC 20408, under the Federal Register Act (44 U.S.C. Subscriptions: Ch. 15) and the regulations of the Administrative Committee of Paper or fiche 202±512±1800 the Federal Register (1 CFR Ch. I). The Superintendent of Assistance with public subscriptions 512±1806 Documents, U.S. Government Printing Office, Washington, DC 20402 is the exclusive distributor of the official edition. General online information 202±512±1530; 1±888±293±6498 Single copies/back copies: The Federal Register provides a uniform system for making available to the public regulations and legal notices issued by Paper or fiche 512±1800 Federal agencies. These include Presidential proclamations and Assistance with public single copies 512±1803 Executive Orders, Federal agency documents having general FEDERAL AGENCIES applicability and legal effect, documents required to be published Subscriptions: by act of Congress, and other Federal agency documents of public interest. Paper or fiche 523±5243 Assistance with Federal agency subscriptions 523±5243 Documents are on file for public inspection in the Office of the Federal Register the day before they are published, unless the issuing agency requests earlier filing.
    [Show full text]
  • Pre-Mission Insights on the Interior of Mars Suzanne E
    Pre-mission InSights on the Interior of Mars Suzanne E. Smrekar, Philippe Lognonné, Tilman Spohn, W. Bruce Banerdt, Doris Breuer, Ulrich Christensen, Véronique Dehant, Mélanie Drilleau, William Folkner, Nobuaki Fuji, et al. To cite this version: Suzanne E. Smrekar, Philippe Lognonné, Tilman Spohn, W. Bruce Banerdt, Doris Breuer, et al.. Pre-mission InSights on the Interior of Mars. Space Science Reviews, Springer Verlag, 2019, 215 (1), pp.1-72. 10.1007/s11214-018-0563-9. hal-01990798 HAL Id: hal-01990798 https://hal.archives-ouvertes.fr/hal-01990798 Submitted on 23 Jan 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Open Archive Toulouse Archive Ouverte (OATAO ) OATAO is an open access repository that collects the wor of some Toulouse researchers and ma es it freely available over the web where possible. This is an author's version published in: https://oatao.univ-toulouse.fr/21690 Official URL : https://doi.org/10.1007/s11214-018-0563-9 To cite this version : Smrekar, Suzanne E. and Lognonné, Philippe and Spohn, Tilman ,... [et al.]. Pre-mission InSights on the Interior of Mars. (2019) Space Science Reviews, 215 (1).
    [Show full text]