Arctic Ice Cap Inquiry

Total Page:16

File Type:pdf, Size:1020Kb

Arctic Ice Cap Inquiry ARCTIC ICE CAP INQUIRY By: Lexi Aizer This Photo by Unknown Author is licensed under CC BY-NC PART A INTRODUCTION: WHAT IS AN ARCTIC ICE CAP? An Arctic ice cap (also known as a Polar ice cap) is a region of land made up of thick ice in the North and South Pole, which is found in the Arctic region. WHY IS THE ARCTIC ICE CAP MELTING? The melting is caused by the overall increase in global temperature, which has caused serious consequences for all organisms. The warming is mainly caused by carbon dioxide. This Photo by Unknown Author is licensed under CC BY PART B: EFFECTS OF THE MELTING OF THE ARCTIC ICE CAP ON THE GEOSPHERE HOW DOES THE MELTING ICE CAP AFFECT THE EXTRACTION OF OIL, NATURAL GAS AND MINERALS? The melting of the polar ice cap is creating more burning of fossil fuels, coal, gas and oil; which causes the earths temperature to go up significantly. This Photo by Unknown Author is licensed under CC BY-SA HOW DOES THE MELTING ICE CAP AFFECT THE RATE OF EROSION AND WEATHERING IN COASTAL AREAS? The Arctic sea ice helps to regulate the climate by keeping it cool, so the ice doesn’t melt. As this sea ice melts, heat from the sun is absorbed by the oceans melting the ice. Small temperature changes in the Arctic can effect weather all over the world. As the ice melts the climate changes. This Photo by Unknown Author is licensed under CC BY-SA HOW IS SUSTAINABILITY OF THE GEOSPHERE AFFECTED BY THE MELTING OF THE ARCTIC ICE CAP? Erosion occurs through a continuous movement, which is created from the oceans waves. The movement results in something called a “wave cut” that can affect the melting of the ice cap. The wave cut will cause cracks and large indents in the ice caps letting in more sunlight melting it at a faster pace. The wave cut could eventually cause the ice cap to collapse from all of the heat and pressure. This could lead to a loss of stability and capsizing. PART C: EFFECTS OF THE MELTING OF THE ARCTIC ICE CAP ON THE ATMOSPHERE This Photo by Unknown Author is licensed under CC BY-NC-ND HOW COULD THE MELTING OF THE ARCTIC ICE CAP AFFECT THE CLIMATE IN OTHER PARTS OF THE WORLD? Climate change will drastically affect multiple natural resources in a variety of ways. Some Coastal regions (including a bunch of countries around the world) will be flooded due to the climate change. The flooding is caused by the drastic changes in the rising ocean levels. Some of the effects include: rising ocean levels, coastal regions of countries being impacted, ocean currents being disrupted and the climate change has been altered. This Photo by Unknown Author is licensed under CC BY-SA-NC HOW COULD THE MELTING OF THE ARCTIC ICE CAP CONTRIBUTE TO CARBON IN THE ATMOSPHERE? Scientists are concerned that carbon dioxide and methane that are being released could cause additional warming by adding extra greenhouse gases already in the atmosphere. Carbon dioxide is already causing some of the warming and melting of the ice cap., so extra greenhouse gases being released will make the problem even worse. This Photo by Unknown Author is licensed under CC BY HOW IS THE SUSTAINABILITY OF THE ATMOSPHERE AFFECTED BY THE MELTING OF THE ARCTIC ICE CAP? Its affecting the animals that live in the icy region, if the ice is melting and continues to melt it will affect their habitats and the way they live. The types of animals include: polar bears, seals, whales and walruses. This Photo by Unknown Author is licensed under CC BY-SA PART D: EFFECTS OF THE MELTING OF THE ARCTIC ICE CAP ON THE HYDROSPHERE This Photo by Unknown Author is licensed under CC BY HOW WILL GREENLAND’S ICE SHEET BE AFFECTED BY THE ARCTIC ICE CAP MELT? Greenland’s ice sheet is melting at a fast rate. The melting will affect the sea life, fisheries, and the coastal communities worldwide. This Photo by Unknown Author is licensed under CC BY-ND WHAT EFFECTS WILL THE CHANGES TO GREENLAND’S ICE SHEET HAVE ON THE HYDROSPHERE? The melting of the Greenland ice sheet will severely raise the sea levels. As land ice melts it will add even more water to the oceans along with the ice on the surface. This causes the water to rise, and potentially flood. HOW IS THE SUSTAINABILITY OF THE HYDROSPHERE AFFECTED BY THE MELTING OF THE ARCTIC ICE CAP? The ice caps help regulate the global temperatures and sea levels. When ice melts it expands, so if all of the ice was to melt the sea level would rise a ton. This would cause a lot of flooding, ruining homes causing many people to go homeless. Without regulations the hydrosphere wouldn’t be sustainable, and people wouldn’t be able to live. This Photo by Unknown Author is licensed under CC BY-NC-ND PART E: EFFECTS OF THE MELTING OF THE ARCTIC ICE CAP ON THE BIOSPHERE This Photo by Unknown Author is licensed under CC BY-SA HOW MUCH HAVE ANIMALS SUCH AS POLAR BEARS, WALRUSES AND SEALS BEEN AFFECTED? Polar bears need ice to travel from one region to another. The polar bears will have to go longer without food if there was less/no ice left. Polar bears are unlikely to survive if there was an ice loss, they will die without it. This Photo by Unknown Author is licensed under CC BY-SA-NC SEALS: The seals give birth and nurse their pups on the ice. Seals live near and under the ice. It is very unlikely they will be able to adapt on land, they rarely go on land in the first place. It would be a very dramatic change for them to have to live on land. Its more dangerous for them to give birth on land because it exposes the pups to a higher risk of being killed by predators. The seals need the ice to survive. This Photo by Unknown Author is licensed under CC BY-SA-NC WALRUSES: The walruses are very sensitive to climate change. Ice is the ideal location for resting and feeding because walruses are the bottom feeders that eat clams and other shellfish. They need ice to get from one region to another, also to get closer to their food. Without ice they wouldn’t be able to feed themselves. This Photo by Unknown Author is licensed under CC BY-SA HOW DOES THE MELTING ICE CAP AFFECT HUNTING AND FISHING BY ABORIGINAL PEOPLE? There are invasive species never seen before that are appearing, species that usually don’t live in the North pole are. It makes it harder for native people to hunt them, villages will be unprotected because of the flooding problem. They are in danger. This Photo by Unknown Author is licensed under CC BY-SA HOW IS THE SUSTAINABILITY OF THE BIOSPHERE AFFECTED BY THE MELTING OF THE ARCTIC ICE CAP? The Greenland and Antarctic ice sheets influence day to day weather and long term climate. The sun contributes to warm oceans which melts the ice cap; as well as the sun reflecting of the water. This Photo by Unknown Author is licensed under CC BY-SA-NC PART F: ANALYZE AND INTERPRET This Photo by Unknown Author is licensed under CC BY-SA HOW DOES THE MELTING OF THE ARCTIC ICE CAP SHOW THAT THE EARTH’S SPHERES ARE INTERCONNECTED? All four spheres can be included in a single location. The Arctic ice cap shows that in the Arctic region the hydrosphere is the ice, snow, and ocean water. The atmosphere is the air, the biosphere are the living organisms, and the geosphere is every part of the region (structure). As the ice is melting it affects the hydrosphere by adding to the rising ocean levels. The melting of the Arctic ice cap is affected by the sun’s warming of the atmosphere. The melting of the Arctic ice cap is also negatively affecting the biosphere by impacting the lifestyles of humans and animals. DO YOU THINK THE MELTING OF THE ARCTIC ICE CAP COULD BE CONSIDERED A GLOBAL PROBLEM? WHY OR WHY NOT? Yes, I believe the melting of the Arctic ice cap is a global problem because it impacts the atmosphere, hydrosphere, biosphere and the geosphere. These spheres are all over the world and not just in the Arctic region. If something was to change drastically like the melting of the ice, all oceans around the world would be impacted as well as all the surrounding animals and people. It is also a global problem because the melting of the Arctic ice cap affects the atmosphere by adding extra greenhouse gases. The melting also contributes to an increase in global warming which melts the ice caps even more at a faster rate. https://www.bing.com/search?q=what+is+the+arctic+ice+cap&qs=HS&pq=wh&sc=8- 2&cvid=2BCDF44D3BBE4F9793A6838C546F8D83&FORM=QBRE&sp=1 https://www.bing.com/search?q=what+is+causing+the+arctic+ice+cap+to+melt&qs=HS& pq=what+is+ca&sc=8- 10&cvid=DD6BFCFA26EA40FAA898455647CCFA2D&FORM=QBRE&sp=1 https://www.greenandgrowing.org/polar-ice-caps-melting/ https://www.greenfacts.org/en/arctic-climate-change/l-3/5-arctic-animals.htm#1p6 https://prezi.com/n4jbts1tizln/effects-of-arctic-ice-cap-melting/ https://sciencing.com/how-does-polar-ice-melting-affect-the-environment-13400295.html https://prezi.com/gqbjuo2m_xxl/effects-of-arctic-ice-cap-melting/ https://www.britannica.com/science/iceberg/Erosion-and-melting https://www.climatehotmap.org/global-warming-locations/greenland-ice-sheet.html WORKS CITED: https://prezi.com/gcksldb1uj61/effects-of-the-melting-arctic-ice-cap/ https://www.greenfacts.org/en/arctic-climate-change/l-3/3-sea-level-rise.htm\ https://brainly.com/question/10376709 https://www.carbonbrief.org/five-reasons-why-the-speed-of-arctic-sea-ice-loss-matters https://prezi.com/zxqbwgmhzrgy/how-does-melting-ice-affect-earths-spheres-and- sustainabilit/ https://blogs.egu.eu/network/geosphere/tag/arctic/ https://www.thoughtco.com/the-four-spheres-of-the-earth-1435323.
Recommended publications
  • Ice Flow Impacts the Firn Structure of Greenland's Percolation Zone
    University of Montana ScholarWorks at University of Montana Graduate Student Theses, Dissertations, & Professional Papers Graduate School 2019 Ice Flow Impacts the Firn Structure of Greenland's Percolation Zone Rosemary C. Leone University of Montana, Missoula Follow this and additional works at: https://scholarworks.umt.edu/etd Part of the Glaciology Commons Let us know how access to this document benefits ou.y Recommended Citation Leone, Rosemary C., "Ice Flow Impacts the Firn Structure of Greenland's Percolation Zone" (2019). Graduate Student Theses, Dissertations, & Professional Papers. 11474. https://scholarworks.umt.edu/etd/11474 This Thesis is brought to you for free and open access by the Graduate School at ScholarWorks at University of Montana. It has been accepted for inclusion in Graduate Student Theses, Dissertations, & Professional Papers by an authorized administrator of ScholarWorks at University of Montana. For more information, please contact [email protected]. ICE FLOW IMPACTS THE FIRN STRUCTURE OF GREENLAND’S PERCOLATION ZONE By ROSEMARY CLAIRE LEONE Bachelor of Science, Colorado School of Mines, Golden, CO, 2015 Thesis presented in partial fulfillMent of the requireMents for the degree of Master of Science in Geosciences The University of Montana Missoula, MT DeceMber 2019 Approved by: Scott Whittenburg, Dean of The Graduate School Graduate School Dr. Joel T. Harper, Chair DepartMent of Geosciences Dr. Toby W. Meierbachtol DepartMent of Geosciences Dr. Jesse V. Johnson DepartMent of Computer Science i Leone, RoseMary, M.S, Fall 2019 Geosciences Ice Flow Impacts the Firn Structure of Greenland’s Percolation Zone Chairperson: Dr. Joel T. Harper One diMensional siMulations of firn evolution neglect horizontal transport as the firn column Moves down slope during burial.
    [Show full text]
  • High Arctic Holocene Temperature Record from the Agassiz Ice Cap and Greenland Ice Sheet Evolution
    High Arctic Holocene temperature record from the Agassiz ice cap and Greenland ice sheet evolution Benoit S. Lecavaliera,1, David A. Fisherb, Glenn A. Milneb, Bo M. Vintherc, Lev Tarasova, Philippe Huybrechtsd, Denis Lacellee, Brittany Maine, James Zhengf, Jocelyne Bourgeoisg, and Arthur S. Dykeh,i aDepartment of Physics and Physical Oceanography, Memorial University, St. John’s, Canada, A1B 3X7; bDepartment of Earth and Environmental Sciences, University of Ottawa, Ottawa, Canada, K1N 6N5; cCentre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark, 2100; dEarth System Science and Departement Geografie, Vrije Universiteit Brussel, Brussels, Belgium, 1050; eDepartment of Geography, University of Ottawa, Ottawa, Canada, K1N 6N5; fGeological Survey of Canada, Natural Resources Canada, Ottawa, Canada, K1A 0E8; gConsorminex Inc., Gatineau, Canada, J8R 3Y3; hDepartment of Earth Sciences, Dalhousie University, Halifax, Canada, B3H 4R2; and iDepartment of Anthropology, McGill University, Montreal, Canada, H3A 2T7 Edited by Jeffrey P. Severinghaus, Scripps Institution of Oceanography, La Jolla, CA, and approved April 18, 2017 (received for review October 2, 2016) We present a revised and extended high Arctic air temperature leading the authors to adopt a spatially homogeneous change in reconstruction from a single proxy that spans the past ∼12,000 y air temperature across the region spanned by these two ice caps. 18 (up to 2009 CE). Our reconstruction from the Agassiz ice cap (Elles- By removing the temperature signal from the δ O record of mere Island, Canada) indicates an earlier and warmer Holocene other Greenland ice cores (Fig. 1A), the residual was used to thermal maximum with early Holocene temperatures that are estimate altitude changes of the ice surface through time.
    [Show full text]
  • “Mining” Water Ice on Mars an Assessment of ISRU Options in Support of Future Human Missions
    National Aeronautics and Space Administration “Mining” Water Ice on Mars An Assessment of ISRU Options in Support of Future Human Missions Stephen Hoffman, Alida Andrews, Kevin Watts July 2016 Agenda • Introduction • What kind of water ice are we talking about • Options for accessing the water ice • Drilling Options • “Mining” Options • EMC scenario and requirements • Recommendations and future work Acknowledgement • The authors of this report learned much during the process of researching the technologies and operations associated with drilling into icy deposits and extract water from those deposits. We would like to acknowledge the support and advice provided by the following individuals and their organizations: – Brian Glass, PhD, NASA Ames Research Center – Robert Haehnel, PhD, U.S. Army Corps of Engineers/Cold Regions Research and Engineering Laboratory – Patrick Haggerty, National Science Foundation/Geosciences/Polar Programs – Jennifer Mercer, PhD, National Science Foundation/Geosciences/Polar Programs – Frank Rack, PhD, University of Nebraska-Lincoln – Jason Weale, U.S. Army Corps of Engineers/Cold Regions Research and Engineering Laboratory Mining Water Ice on Mars INTRODUCTION Background • Addendum to M-WIP study, addressing one of the areas not fully covered in this report: accessing and mining water ice if it is present in certain glacier-like forms – The M-WIP report is available at http://mepag.nasa.gov/reports.cfm • The First Landing Site/Exploration Zone Workshop for Human Missions to Mars (October 2015) set the target
    [Show full text]
  • Polar Ice in the Solar System
    Recommended Reading List for Polar Ice in the Inner Solar System Compiled by: Shane Byrne Lunar and Planetary Laboratory, University of Arizona. April 23rd, 2007 Polar Ice on Airless Bodies................................................................................................. 2 Initial theories and modeling results for these ice deposits: ........................................... 2 Observational evidence (or lack of) for polar ice on airless bodies:............................... 3 Martian Polar Ice................................................................................................................. 4 Good (although dated) introductory material ................................................................. 4 Polar Layered Deposits:...................................................................................................... 5 Ice-flow (or lack thereof) and internal structure in the polar layered deposits............... 5 North polar basal-unit ..................................................................................................... 6 Geologic Mapping and impact cratering......................................................................... 6 Connection of polar layered deposits (PLD) to climate.................................................. 7 Formation of troughs, scarps and chasmata.................................................................... 7 Surface Properties of the PLD ........................................................................................ 8 Eolian Processes
    [Show full text]
  • Greenland's Ice Cap Super Melting Is Currently Losing 200 Cubic Kilometres Our Swiss Army Kit for of Ice Each Year — and Accelerating
    MORE GOOD STUFF Speeding up! ADSL DIY We show you how to make Turbocharge your Internet your PC run faster. without having to call in the geeks. Communities: Mon, 21 Aug 2006 You are in: Cooltech > Science & Nature BLOGS CLASSIFIEDS ENVIRONMENT CONVERTERS Greenland's ice cap super DOWNLOADS melting FEATURES Fri, 11 Aug 2006 GAMES MOBILE MAGIC The vast ice cap that covers most of NEW IDEAS Greenland is melting at a spectacular rate, and three times faster than five NEWSLETTER years ago, reports National Geographic SCIENCE & NATURE News. Swiss Army Kit SPACE SWISS ARMY KIT This is according to a new study, Frustrated published online by the journal Science, More Science & Nature TECH NEWS with your PC? which further indicates that Greenland Check out THE GADGET CORNER Greenland's ice cap super melting is currently losing 200 cubic kilometres our Swiss Army Kit for of ice each year — and accelerating. 'Warrior' gene 'linked' to Maori violence the answer! eMail the Ads by Goooooogle Where there's muck, there's Monet Cooltech Editor if you The study also finds that the melting Electric Snow Melt have a problem, and polar ice is raising sea levels around the Elephants show capacity for compassion we'll do our best to Cables globe. This could have a serious impact First koala born in Africa help! Waterproof Electric as global sea levels will rise by 6.5 Heating Cable Thick metres if all the ice on Greenland were China promises smog-free Olympics means durability.Since The Tech Set to melt, which could result in many Adventurer finishes 327km Thames swim 1930 islands being wiped out and even low- www.WarmYourFloor.com lying countries such as the Netherlands.
    [Show full text]
  • Chapter 7 Seasonal Snow Cover, Ice and Permafrost
    I Chapter 7 Seasonal snow cover, ice and permafrost Co-Chairmen: R.B. Street, Canada P.I. Melnikov, USSR Expert contributors: D. Riseborough (Canada); O. Anisimov (USSR); Cheng Guodong (China); V.J. Lunardini (USA); M. Gavrilova (USSR); E.A. Köster (The Netherlands); R.M. Koerner (Canada); M.F. Meier (USA); M. Smith (Canada); H. Baker (Canada); N.A. Grave (USSR); CM. Clapperton (UK); M. Brugman (Canada); S.M. Hodge (USA); L. Menchaca (Mexico); A.S. Judge (Canada); P.G. Quilty (Australia); R.Hansson (Norway); J.A. Heginbottom (Canada); H. Keys (New Zealand); D.A. Etkin (Canada); F.E. Nelson (USA); D.M. Barnett (Canada); B. Fitzharris (New Zealand); I.M. Whillans (USA); A.A. Velichko (USSR); R. Haugen (USA); F. Sayles (USA); Contents 1 Introduction 7-1 2 Environmental impacts 7-2 2.1 Seasonal snow cover 7-2 2.2 Ice sheets and glaciers 7-4 2.3 Permafrost 7-7 2.3.1 Nature, extent and stability of permafrost 7-7 2.3.2 Responses of permafrost to climatic changes 7-10 2.3.2.1 Changes in permafrost distribution 7-12 2.3.2.2 Implications of permafrost degradation 7-14 2.3.3 Gas hydrates and methane 7-15 2.4 Seasonally frozen ground 7-16 3 Socioeconomic consequences 7-16 3.1 Seasonal snow cover 7-16 3.2 Glaciers and ice sheets 7-17 3.3 Permafrost 7-18 3.4 Seasonally frozen ground 7-22 4 Future deliberations 7-22 Tables Table 7.1 Relative extent of terrestrial areas of seasonal snow cover, ice and permafrost (after Washburn, 1980a and Rott, 1983) 7-2 Table 7.2 Characteristics of the Greenland and Antarctic ice sheets (based on Oerlemans and van der Veen, 1984) 7-5 Table 7.3 Effect of terrestrial ice sheets on sea-level, adapted from Workshop on Glaciers, Ice Sheets and Sea Level: Effect of a COylnduced Climatic Change.
    [Show full text]
  • INTERNATIONAL Greenland's Ice Cap Melting at Accelerating Rate by Finfacts Team Aug 11, 2006, 14:17
    Rutherford Roofing Inc. Roofing & Rain Gutters California Roofing Aluminium Composite Panel Roofing Contractor in Los Angeles Serving Long Beach, LA & the 15% Senior Discount! Free Construction, Wall Cladding Re-Roofs, Repairs, New South Bay areas of Southern Estimate. Emergency Repairs. Curtain Wall, Building Materials Construction California Seal Coating. Ads by Goooooogle Advertise on this site INTERNATIONAL Greenland's ice cap melting at accelerating rate By Finfacts Team Aug 11, 2006, 14:17 The Greenland ice sheet experienced record melting in September 2002, as did much of the Arctic. A comparison of images from 2001 through 2003 and 2004 shows the changes in Greenland’s ice sheet over the past few years. In this image, the melt zone appears along the western edge of the ice. In this zone, water has saturated the ice, darkening its color from white to blue-gray. The colored lines indicate the approximate melt zone extents for June 2001 through June 2005. Between June 2001 and June 2003, the melt zone increased substantially, then shrank somewhat in June 2004. The melt zone for June 2005 appears roughly equivalent to that of June 2002, the same year that later set a record in Greenland Ice Sheet melting. These images show the Greenland Ice Sheet midway through the seasonal melt. Summer melting begins in late April and reaches its maximum in late August or early September. As in previous years, blue melt ponds liberally dot the surface. Though they may look pretty, too many ponds spell trouble for the ice sheet. These ponds serve as reservoirs of water that can speed the ice’s journey to the sea.
    [Show full text]
  • Summit Station Skiway Review
    6 - 13 - TR L RRE C ERDC/ Engineering for Polar Operations, Logistics and Research (EPOLAR) Summit Station Skiway Review Margaret A. Knuth, Terry D. Melendy, March 2013 and Amy M. Burzynski Laboratory Research Research Engineering Engineering ld Regions Co and Approved for public release; distribution is unlimited. Engineering for Polar Operations, Logistics ERDC/CRREL TR-13-6 and Research (EPOLAR) February 2013 Summit Station Skiway Review Margaret A. Knuth, Terry D. Melendy, and Amy M. Burzynski Cold regions Research and Engineering Laboratory US Army Engineer Research and Development Center 72 Lyme Road Hanover, NH 03755 Final report Approved for public release; distribution is unlimited. Prepared for National Science Foundation, Office of Polar Programs, Arctic Research Support and Logistics Program Under Engineering for Polar Operations, Logistics and Research (EPOLAR) ERDC/CRREL TR-13-6 ii Abstract: Summit Station, located at the peak of the Greenland ice cap, is a scientific research station maintained by the National Science Founda- tion. Transportation to and from the station, for the delivery of personnel and materials, is by skied airplanes or by annual traverse. To support air- craft, the station staff uses heavy equipment to maintain a 5120.6 × 61.0 m (16,800 × 200 ft) skiway. When the station is open for the summer season, from mid-April through August, the skiway sees regular use. This report defines procedures and identifies equipment to strengthen and smooth the skiway surface. Effective skiway maintenance has the potential to help re- duce the overall skiway maintenance time, decrease the number of slides per flight period, increase ACLs, and reduce the need for Jet Assisted Take-Offs (JATO).
    [Show full text]
  • Topography of the North and South Polar Ice Caps on Mars
    TOPOGRAPHY OF THE NORTH AND SOUTH POLAR ICE CAPS ON MARS. Anton B. Ivanov, Duane O. Muhleman, California Institute of Technology, Pasadena, CA, 91125, USA, [email protected]. Recent observations by Mars Orbiter Laser Altimeter have of the underlying topography under the ice cap or some other provided high resolution view of the Northern Ice cap [7], large scale process. We know from Viking observations that compiled on the basis of data returned during Science Phasing there is substantially less amounts of water vapor observed Orbit. Starting in March 1999, Mars Global Surveyor was over the south pole than over the north pole. On the other hand transferred into its mapping configuration and began system- the albedo of the southern ice cap is lower, so we can expect atic observations of Mars. Data returned during the mapping higher temperatures on the surface and hence more extensive orbit allowed compilation of high resolution topography grid evaporation. Possibly, an insulating layer of dust prevents for the southern ice cap ( [5]). This paper will concentrate on water ice from escape. Relative age estimates, obtained from description of observations of the southern ice cap topography craters by [4] suggest older ages for the southern polar layered and comparison with the northern ice cap. We will com- deposits, than for the northern polar layered deposits. We do pare topography across the ice caps and apply a sublimation not know well composition of the south polar layered deposits model ( [2]), which was developed to explain the shape of the and it is hard to hypothesize on evaporation rates at this point.
    [Show full text]
  • Dynamic/Thermodynamic Simulations of the North Polar Ice Cap of Mars
    First International Conference on Mars Polar Science 3001.pdf DYNAMIC/THERMODYNAMIC SIMULATIONS OF THE NORTH POLAR ICE CAP OF MARS. R. Greve, Institut fur¨ Mechanik III, Technische Universitat¨ Darmstadt, D-64289 Darmstadt, Germany, [email protected]. Ice-sheet model SICOPOLIS times mean-density ratio Mars/Earth). The bedrock response to changing ice loads is modelled by a delayed local isostatic = 3000 The present permanent north polar water ice cap of Mars is in- balance with the time lag V yr. vestigated with the dynamic/thermodynamic ice-sheet model According to the data listed by Budd et al. (1986), the mean SICOPOLIS (SImulation COde for POLythermal Ice Sheets), T annual air temperature above the ice, ma , is described by a ~ h which was originally developped for and applied to terrestrial parameterization depending on elevation, , and co-latitude, ~ =90 ice sheets like Greenland, Antarctica and the glacial northern ( N ,where is the latitude), hemisphere (Greve, 1997b, c; Calov et al., 1998; Greve et al., 0 ~ T = T + h + c ; 3 ma ma ma 1998). The model is based on the continuum-mechanical the- ma ory of polythermal ice masses (Hutter, 1982, 1993; Greve, 0 T = 90 = 2:5 ma 1997a), which describes the material ice as a density-preser- with ma C, the mean lapse rate C/km, c = 1:5 ving, heat-conducting power-law fluid with thermo-mechani- and ma C/ lat. The accumulation of water ice on cal coupling due to the strong temperature dependence of the the surface of the ice cap is assumed to be spatially con- stant.
    [Show full text]
  • Changes in Glacier Facies Zonation on Devon Ice Cap, Nunavut, Detected
    The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-250 Manuscript under review for journal The Cryosphere Discussion started: 26 November 2018 c Author(s) 2018. CC BY 4.0 License. 1 Changes in glacier facies zonation on Devon Ice Cap, Nunavut, detected from SAR imagery 2 and field observations 3 4 Tyler de Jong1, Luke Copland1, David Burgess2 5 1 Department of Geography, Environment and Geomatics, University of Ottawa, Ottawa, Ontario 6 K1N 6N5, Canada 7 2 Natural Resources Canada, 601 Booth St., Ottawa, Ontario K1A 0E8, Canada 8 9 Abstract 10 Envisat ASAR WS images, verified against mass balance, ice core, ground-penetrating radar and 11 air temperature measurements, are used to map changes in the distribution of glacier facies zones 12 across Devon Ice Cap between 2004 and 2011. Glacier ice, saturation/percolation and pseudo dry 13 snow zones are readily distinguishable in the satellite imagery, and the superimposed ice zone can 14 be mapped after comparison with ground measurements. Over the study period there has been a 15 clear upglacier migration of glacier facies, resulting in regions close to the firn line switching from 16 being part of the accumulation area with high backscatter to being part of the ablation area with 17 relatively low backscatter. This has coincided with a rapid increase in positive degree days near 18 the ice cap summit, and an increase in the glacier ice zone from 71% of the ice cap in 2005 to 92% 19 of the ice cap in 2011. This has significant implications for the area of the ice cap subject to 20 meltwater runoff.
    [Show full text]
  • Solar-System-Wide Significance of Mars Polar Science
    Solar-System-Wide Significance of Mars Polar Science A White Paper submitted to the Planetary Sciences Decadal Survey 2023-2032 Point of Contact: Isaac B. Smith ([email protected]) Phone: 647-233-3374 York University and Planetary Science Institute 4700 Keele St, Toronto, Ontario, Canada Acknowledgements: A portion of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). © 2020. All rights reserved. 1 This list includes many of the hundreds of current students and scientists who have made significant contributions to Mars Polar Science in the past decade. Every name listed represents a person who asked to join the white paper or agreed to be listed and provided some comments. Author List: I. B. Smith York University, PSI W. M. Calvin University of Nevada Reno D. E. Smith Massachusetts Institute of Technology C. Hansen Planetary Science Institute S. Diniega Jet Propulsion Laboratory, Caltech A. McEwen Lunar and Planetary Laboratory N. Thomas Universität Bern D. Banfield Cornell University T. N. Titus U.S. Geological Survey P. Becerra Universität Bern M. Kahre NASA Ames Research Center F. Forget Sorbonne Université M. Hecht MIT Haystack Observatory S. Byrne University of Arizona C. S. Hvidberg University of Copenhagen P. O. Hayne University of Colorado LASP J. W. Head III Brown University M. Mellon Cornell University B. Horgan Purdue University J. Mustard Brown University J. W. Holt Lunar and Planetary Laboratory A. Howard Planetary Science Institute D. McCleese Caltech C. Stoker NASA Ames Research Center P. James Space Science Institute N.
    [Show full text]