Temperature and Precipitation History of the Arctic
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North America Other Continents
Arctic Ocean Europe North Asia America Atlantic Ocean Pacific Ocean Africa Pacific Ocean South Indian America Ocean Oceania Southern Ocean Antarctica LAND & WATER • The surface of the Earth is covered by approximately 71% water and 29% land. • It contains 7 continents and 5 oceans. Land Water EARTH’S HEMISPHERES • The planet Earth can be divided into four different sections or hemispheres. The Equator is an imaginary horizontal line (latitude) that divides the earth into the Northern and Southern hemispheres, while the Prime Meridian is the imaginary vertical line (longitude) that divides the earth into the Eastern and Western hemispheres. • North America, Earth’s 3rd largest continent, includes 23 countries. It contains Bermuda, Canada, Mexico, the United States of America, all Caribbean and Central America countries, as well as Greenland, which is the world’s largest island. North West East LOCATION South • The continent of North America is located in both the Northern and Western hemispheres. It is surrounded by the Arctic Ocean in the north, by the Atlantic Ocean in the east, and by the Pacific Ocean in the west. • It measures 24,256,000 sq. km and takes up a little more than 16% of the land on Earth. North America 16% Other Continents 84% • North America has an approximate population of almost 529 million people, which is about 8% of the World’s total population. 92% 8% North America Other Continents • The Atlantic Ocean is the second largest of Earth’s Oceans. It covers about 15% of the Earth’s total surface area and approximately 21% of its water surface area. -
Papers Published And/Or Accepted for Publication in 2018-2019 (List Incomplete)
Papers published and/or accepted for publication in 2018-2019 (list incomplete) Allington, G. R. H., Fernandez-Gimenez M. E., Chen Belt (ADB). In: (G Gutman, J Chen, GM Henebry, J, and Brown and D G 2018: Combining M Kappas, eds.) Landscape Dynamics across participatory scenario planning and systems Drylands of Greater Central Asia: People, modeling to identify drivers of future sustainability Societies and Ecosystems. Springer. Chapter 10. on the Mongolian Plateau. Ecology and Chen Y, Tao Y, Cheng Y, Ju W, Ye J, Hickler T, Liao Society 23(2):9. C, Feng L and Ruan H 2018: Great uncertainties https://doi.org/10.5751/ES-10034-230209 in modeling grazing impact on carbon An S, Chen X, Zhang XY, Yan D and Henebry GM sequestration: a multi-model inter-comparison in 2018. An exploration of terrain effects on land temperate Eurasian Steppe Environ. Res. surface phenology across the Qinghai-Tibetan Lett. 13 075005 Plateau using Landsat ETM+ and OLI Chen Y, Fei X, Groisman P, Sun Z, Zhang J, and Qin data Remote Sensing 10(7):1069. Z, 2019: Contrasting policy shifts influence the https://doi.org/10.3390/rs10071069 pattern of vegetation production and C Bastos A , Peregon A, Gani ÉA, Khudyaev S, Yue C, sequestration over pasture systems: a regional- Li W, Gouveia CM and Ciais P 2018 Influence of scale comparison in Temperate Eurasian Steppe. high-latitude warming and land-use changes in the Agricultural Systems, Accepted. early 20th century northern Eurasian CO2 sink Deppermann A, Balkovič J, Bundle S-C, di Fulvio F, Environ. Res. -
Meltwater Routing and the Younger Dryas
Meltwater routing and the Younger Dryas Alan Condrona,1 and Peter Winsorb aClimate System Research Center, Department of Geosciences, University of Massachusetts, Amherst, MA 01003; and bInstitute of Marine Science, School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775 Edited by James P. Kennett, University of California, Santa Barbara, CA, and approved September 27, 2012 (received for review May 2, 2012) The Younger Dryas—the last major cold episode on Earth—is gen- to correct another. A separate reconstruction of the drainage erally considered to have been triggered by a meltwater flood into chronology of North America by Tarasov and Peltier (8) found the North Atlantic. The prevailing hypothesis, proposed by Broecker that rather than being to the east, the geographical release point of et al. [1989 Nature 341:318–321] more than two decades ago, sug- meltwater to the ocean at this time might have been toward the gests that an abrupt rerouting of Lake Agassiz overflow through Arctic. Further support for a northward drainage route has since the Great Lakes and St. Lawrence Valley inhibited deep water for- been provided by Peltier et al. (9). Using a numerical model, the mation in the subpolar North Atlantic and weakened the strength authors showed that the response of the AMOC to meltwater of the Atlantic Meridional Overturning Circulation (AMOC). More re- placed directly over the North Atlantic (50° N to 70° N) and the cently, Tarasov and Peltier [2005 Nature 435:662–665] showed that entire Arctic Ocean were almost identical. This result implies that meltwater could have discharged into the Arctic Ocean via the meltwater released into the Arctic might be capable of cooling the Mackenzie Valley ∼4,000 km northwest of the St. -
Baffin Bay Sea Ice Extent and Synoptic Moisture Transport Drive Water Vapor
Atmos. Chem. Phys., 20, 13929–13955, 2020 https://doi.org/10.5194/acp-20-13929-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Baffin Bay sea ice extent and synoptic moisture transport drive water vapor isotope (δ18O, δ2H, and deuterium excess) variability in coastal northwest Greenland Pete D. Akers1, Ben G. Kopec2, Kyle S. Mattingly3, Eric S. Klein4, Douglas Causey2, and Jeffrey M. Welker2,5,6 1Institut des Géosciences et l’Environnement, CNRS, 38400 Saint Martin d’Hères, France 2Department of Biological Sciences, University of Alaska Anchorage, 99508 Anchorage, AK, USA 3Institute of Earth, Ocean, and Atmospheric Sciences, Rutgers University, 08854 Piscataway, NJ, USA 4Department of Geological Sciences, University of Alaska Anchorage, 99508 Anchorage, AK, USA 5Ecology and Genetics Research Unit, University of Oulu, 90014 Oulu, Finland 6University of the Arctic (UArctic), c/o University of Lapland, 96101 Rovaniemi, Finland Correspondence: Pete D. Akers ([email protected]) Received: 9 April 2020 – Discussion started: 18 May 2020 Revised: 23 August 2020 – Accepted: 11 September 2020 – Published: 19 November 2020 Abstract. At Thule Air Base on the coast of Baffin Bay breeze development, that radically alter the nature of rela- (76.51◦ N, 68.74◦ W), we continuously measured water va- tionships between isotopes and many meteorological vari- por isotopes (δ18O, δ2H) at a high frequency (1 s−1) from ables in summer. On synoptic timescales, enhanced southerly August 2017 through August 2019. Our resulting record, flow promoted by negative NAO conditions produces higher including derived deuterium excess (dxs) values, allows an δ18O and δ2H values and lower dxs values. -
1922 Elizabeth T
co.rYRIG HT, 192' The Moootainetro !scot1oror,d The MOUNTAINEER VOLUME FIFTEEN Number One D EC E M BER 15, 1 9 2 2 ffiount Adams, ffiount St. Helens and the (!oat Rocks I ncoq)Ora,tecl 1913 Organized 190!i EDITORlAL ST AitF 1922 Elizabeth T. Kirk,vood, Eclttor Margaret W. Hazard, Associate Editor· Fairman B. L�e, Publication Manager Arthur L. Loveless Effie L. Chapman Subsc1·iption Price. $2.00 per year. Annual ·(onl�') Se,·ent�·-Five Cents. Published by The Mountaineers lncorJ,orated Seattle, Washington Enlerecl as second-class matter December 15, 19t0. at the Post Office . at . eattle, "\Yash., under the .-\0t of March 3. 1879. .... I MOUNT ADAMS lllobcl Furrs AND REFLEC'rION POOL .. <§rtttings from Aristibes (. Jhoutribes Author of "ll3ith the <6obs on lltount ®l!!mµus" �. • � J� �·,,. ., .. e,..:,L....._d.L.. F_,,,.... cL.. ��-_, _..__ f.. pt",- 1-� r�._ '-';a_ ..ll.-�· t'� 1- tt.. �ti.. ..._.._....L- -.L.--e-- a';. ��c..L. 41- �. C4v(, � � �·,,-- �JL.,�f w/U. J/,--«---fi:( -A- -tr·�� �, : 'JJ! -, Y .,..._, e� .,...,____,� � � t-..__., ,..._ -u..,·,- .,..,_, ;-:.. � --r J /-e,-i L,J i-.,( '"'; 1..........,.- e..r- ,';z__ /-t.-.--,r� ;.,-.,.....__ � � ..-...,.,-<. ,.,.f--· :tL. ��- ''F.....- ,',L � .,.__ � 'f- f-� --"- ��7 � �. � �;')'... f ><- -a.c__ c/ � r v-f'.fl,'7'71.. I /!,,-e..-,K-// ,l...,"4/YL... t:l,._ c.J.� J..,_-...A 'f ',y-r/� �- lL.. ��•-/IC,/ ,V l j I '/ ;· , CONTENTS i Page Greetings .......................................................................tlristicles }!}, Phoiitricles ........ r The Mount Adams, Mount St. Helens, and the Goat Rocks Outing .......................................... B1/.ith Page Bennett 9 1 Selected References from Preceding Mount Adams and Mount St. -
Recent Declines in Warming and Vegetation Greening Trends Over Pan-Arctic Tundra
Remote Sens. 2013, 5, 4229-4254; doi:10.3390/rs5094229 OPEN ACCESS Remote Sensing ISSN 2072-4292 www.mdpi.com/journal/remotesensing Article Recent Declines in Warming and Vegetation Greening Trends over Pan-Arctic Tundra Uma S. Bhatt 1,*, Donald A. Walker 2, Martha K. Raynolds 2, Peter A. Bieniek 1,3, Howard E. Epstein 4, Josefino C. Comiso 5, Jorge E. Pinzon 6, Compton J. Tucker 6 and Igor V. Polyakov 3 1 Geophysical Institute, Department of Atmospheric Sciences, College of Natural Science and Mathematics, University of Alaska Fairbanks, 903 Koyukuk Dr., Fairbanks, AK 99775, USA; E-Mail: [email protected] 2 Institute of Arctic Biology, Department of Biology and Wildlife, College of Natural Science and Mathematics, University of Alaska, Fairbanks, P.O. Box 757000, Fairbanks, AK 99775, USA; E-Mails: [email protected] (D.A.W.); [email protected] (M.K.R.) 3 International Arctic Research Center, Department of Atmospheric Sciences, College of Natural Science and Mathematics, 930 Koyukuk Dr., Fairbanks, AK 99775, USA; E-Mail: [email protected] 4 Department of Environmental Sciences, University of Virginia, 291 McCormick Rd., Charlottesville, VA 22904, USA; E-Mail: [email protected] 5 Cryospheric Sciences Branch, NASA Goddard Space Flight Center, Code 614.1, Greenbelt, MD 20771, USA; E-Mail: [email protected] 6 Biospheric Science Branch, NASA Goddard Space Flight Center, Code 614.1, Greenbelt, MD 20771, USA; E-Mails: [email protected] (J.E.P.); [email protected] (C.J.T.) * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +1-907-474-2662; Fax: +1-907-474-2473. -
AMAP Update on Selected Climate Issues of Concern: Observations, Short-Lived Climate Forcers, Arctic Carbon Cycle, and Predictive Capability
DRAFT: FOR RESTRICTED CIRCULATION FOR REVIEW PURPOSES ONLY. DO NO CITE, COPY OR DISTRIBUTE Version approved by AMAP WG, 14 January 2009 AMAP Update on Selected Climate Issues of Concern: Observations, Short-lived Climate Forcers, Arctic Carbon Cycle, and Predictive Capability EXECUTIVE SUMMARY C1. The Arctic Climate Impact Assessment and the Intergovernmental Panel on Climate Change have established the importance of climate change in the Arctic both regionally and globally. Following those reports, emphasis has been placed on continued observations, a new assessment of the Arctic carbon cycle, the role of short lived climate forcers in the Arctic, and the need for improved predictive capacity at the regional level in the Arctic. C2. The Arctic continues to warm. Since publication of the Arctic Climate Impact Assessment in 2005, several indicators show further and extensive climate change at rates faster than previously anticipated. Air temperatures are increasing in the Arctic. Sea ice extent has decreased sharply, with a record low in 2007 and ice-free conditions in both the Northeast and Northwest sea passages for first time in recorded history in 2008. As ice that persists for several years (multi- year ice) is replaced by newly formed (first-year) ice, the Arctic sea-ice is becoming increasingly vulnerable to melting. Surface waters in the Arctic Ocean are warming. Permafrost is warming and, at its margins, thawing. Snow cover in the Northern Hemisphere is decreasing by 1-2% per year. Glaciers are shrinking and the melt area of the Greenland Ice Cap is increasing. The treeline is moving northwards in some areas up to 3-10 meters per year, and there is increased shrub growth north of the treeline. -
Safeguarding the Arctic Why the U.S
Safeguarding the Arctic Why the U.S. Must Lead in the High North By Cathleen Kelly and Miranda Peterson January 22, 2015 “As the United States assumes the Chairmanship of the Arctic Council, it is more important than ever that we have a coordinated national effort that takes advantage of our combined expertise and efforts in the Arctic region to promote our shared values and priorities.” — President Obama, Executive Order on Enhancing Coordination of National Efforts in the Arctic, January 21, 20151 While many Americans do not consider the United States to be an Arctic nation, Alaska—which constitutes 16 percent of the country’s landmass and sits on the Arctic Circle—puts the country solidly in that category.2 Consequently, it is with good reason that the United States has a seat on the Arctic Council. As Arctic warming accelerates, U.S. leadership in the High North is key not only to the public health and safety of Americans and other people in the region, but also to U.S. national security and the fate of the planet. In just three months, U.S. Secretary of State John Kerry will become chairman of the Arctic Council. The two-year position rotates among the eight Arctic nations3—Canada, Finland, Iceland, Norway, Russia, Sweden, the United States, and Denmark, including Greenland and the Faroe Islands—and is a powerful platform for shaping how the risks and opportunities of increasing commercial activity at the top of the world are managed. To ready the administration for Secretary Kerry’s turn to hold the Arctic Council gavel from 2015 to 2017, President Barack Obama recently issued an executive order to better coordinate national efforts in the Arctic.4 The executive order is the latest signal from the White House that President Obama and Secretary Kerry are focused on preparing the nation for dramatic changes in the Arctic and protecting U.S. -
Canada GREENLAND 80°W
DO NOT EDIT--Changes must be made through “File info” CorrectionKey=NL-B Module 7 70°N 30°W 20°W 170°W 180° 70°N 160°W Canada GREENLAND 80°W 90°W 150°W 100°W (DENMARK) 120°W 140°W 110°W 60°W 130°W 70°W ARCTIC Essential Question OCEANDo Canada’s many regional differences strengthen or weaken the country? Alaska Baffin 160°W (UNITED STATES) Bay ic ct r le Y A c ir u C k o National capital n M R a 60°N Provincial capital . c k e Other cities n 150°W z 0 200 400 Miles i Iqaluit 60°N e 50°N R YUKON . 0 200 400 Kilometers Labrador Projection: Lambert Azimuthal TERRITORY NUNAVUT Equal-Area NORTHWEST Sea Whitehorse TERRITORIES Yellowknife NEWFOUNDLAND AND LABRADOR Hudson N A Bay ATLANTIC 140°W W E St. John’s OCEAN 40°W BRITISH H C 40°N COLUMBIA T QUEBEC HMH Middle School World Geography A MANITOBA 50°N ALBERTA K MS_SNLESE668737_059M_K.ai . S PRINCE EDWARD ISLAND R Edmonton A r Canada legend n N e a S chew E s kat Lake a as . Charlottetown r S R Winnipeg F Color Alts Vancouver Calgary ONTARIO Fredericton W S Island NOVA SCOTIA 50°WFirst proof: 3/20/17 Regina Halifax Vancouver Quebec . R 2nd proof: 4/6/17 e c Final: 4/12/17 Victoria Winnipeg Montreal n 130°W e NEW BRUNSWICK Lake r w Huron a Ottawa L PACIFIC . t S OCEAN Lake 60°W Superior Toronto Lake Lake Ontario UNITED STATES Lake Michigan Windsor 100°W Erie 90°W 40°N 80°W 70°W 120°W 110°W In this module, you will learn about Canada, our neighbor to the north, Explore ONLINE! including its history, diverse culture, and natural beauty and resources. -
Assessing Snow Phenology Over the Large Part of Eurasia Using Satellite Observations from 2000 to 2016
remote sensing Article Assessing Snow Phenology over the Large Part of Eurasia Using Satellite Observations from 2000 to 2016 Yanhua Sun 1, Tingjun Zhang 1,2,*, Yijing Liu 1, Wenyu Zhao 1 and Xiaodong Huang 3 1 Key Laboratory of West China’s Environment (DOE), College of Earth and Environment Sciences, Lanzhou University, Lanzhou 730000, China; [email protected] (Y.S.); [email protected] (Y.L.); [email protected] (W.Z.) 2 University Corporation for Polar Research, Beijing 100875, China 3 School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China; [email protected] * Correspondence: [email protected]; Tel.: +86-138-9337-2955 Received: 25 May 2020; Accepted: 23 June 2020; Published: 26 June 2020 Abstract: Snow plays an important role in meteorological, hydrological and ecological processes, and snow phenology variation is critical for improved understanding of climate feedback on snow cover. The main purpose of the study is to explore spatial-temporal changes and variabilities of the extent, timing and duration, as well as phenology of seasonal snow cover across the large part of Eurasia from 2000 through 2016 using a Moderate Resolution Imaging Spectroradiometer (MODIS) cloud-free snow product produced in this study. The results indicate that there are no significant positive or negative interannual trends of snow cover extent (SCE) from 2000 to 2016, but there are large seasonal differences. SCE shows a significant negative trend in spring (p = 0.01) and a positive trend in winter. The stable snow cover areas accounting for 78.8% of the large part of Eurasia, are mainly located north of latitude 45◦ N and in the mountainous areas. -
THE POLAR THAW: an Analysis of the Impacts of Climate Change on the Environment and Geopolitics of the Arctic Polar Region
THE POLAR THAW: An Analysis Of The Impacts Of Climate Change On The Environment And Geopolitics Of The Arctic Polar Region Alexandra Stoicof Spring 2008 ________________________________________________________________________ SIT Geneva: International Studies, Organizations and Social Justice Adrian Herrera, Arctic Power Alexandre Lambert, School for International Training The George Washington University International Affairs and Geography Stoicof 2 Copyright permission The author hereby does grant the School for International Training the permission to electronically reproduce and transmit this document to the students, alumni, staff, and faculty of the World Learning Community. The author hereby does grant the School for International Training the permission to electronically reproduce and transmit this document to the public via the World Wide Web or other electronic means. The author hereby does grant the School for International Training the permission to reproduce this document to the public in print format. Student (please print name): Alexandra Stoicof Signature: Date: Abstract The issues facing the Arctic region today are of relatively new importance on the agendas of environmentalists, lawyers, and national governments. Global warming is affecting the polar regions at a faster pace than the rest of the world, and is drastically changing the ecosystem and viability of the indigenous groups who depend on the environment of the tundra. The forced adaptation of the natives has lead to convictions of human rights and debates over the accountability of the world to affected communities. The retreat of Arctic sea-ice also exposes another area of controversy; the claims to the resources and passageways that are becoming increasingly accessible. The beginnings of an international race to claim sea territory has lead to interpretations of the law of the sea. -
Speleothem Paleoclimatology for the Caribbean, Central America, and North America
quaternary Review Speleothem Paleoclimatology for the Caribbean, Central America, and North America Jessica L. Oster 1,* , Sophie F. Warken 2,3 , Natasha Sekhon 4, Monica M. Arienzo 5 and Matthew Lachniet 6 1 Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37240, USA 2 Department of Geosciences, University of Heidelberg, 69120 Heidelberg, Germany; [email protected] 3 Institute of Environmental Physics, University of Heidelberg, 69120 Heidelberg, Germany 4 Department of Geological Sciences, Jackson School of Geosciences, University of Texas, Austin, TX 78712, USA; [email protected] 5 Desert Research Institute, Reno, NV 89512, USA; [email protected] 6 Department of Geoscience, University of Nevada, Las Vegas, NV 89154, USA; [email protected] * Correspondence: [email protected] Received: 27 December 2018; Accepted: 21 January 2019; Published: 28 January 2019 Abstract: Speleothem oxygen isotope records from the Caribbean, Central, and North America reveal climatic controls that include orbital variation, deglacial forcing related to ocean circulation and ice sheet retreat, and the influence of local and remote sea surface temperature variations. Here, we review these records and the global climate teleconnections they suggest following the recent publication of the Speleothem Isotopes Synthesis and Analysis (SISAL) database. We find that low-latitude records generally reflect changes in precipitation, whereas higher latitude records are sensitive to temperature and moisture source variability. Tropical records suggest precipitation variability is forced by orbital precession and North Atlantic Ocean circulation driven changes in atmospheric convection on long timescales, and tropical sea surface temperature variations on short timescales. On millennial timescales, precipitation seasonality in southwestern North America is related to North Atlantic climate variability.