FULLTEXT01.Pdf
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Quantitative Composition and Granulometry of Aeolian Bedforms in Endeavour and Gale Craters Inferred from Visible Near-Infrared Spectra
45th Lunar and Planetary Science Conference (2014) 1431.pdf QUANTITATIVE COMPOSITION AND GRANULOMETRY OF AEOLIAN BEDFORMS IN ENDEAVOUR AND GALE CRATERS INFERRED FROM VISIBLE NEAR-INFRARED SPECTRA. Mathieu G.A. Lapotre1, Bethany L. Ehlmann1,2, Raymond E. Arvidson3. 1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA. 2Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA, 3Department of Earth & Planetary Sciences, Washington University in St. Louis, MO, USA. Introduction: Modern Mars is a wind world. Its ing Spectrometer for Mars (CRISM) visible near- surface hosts a variety of aeolian features, such as line- infrared spectra (VISIR). The goal of this study is to ar, barchan and star dunes, ripples, granule ripples, compare inversions made from orbit to ground truth yardangs and ventifacts [1]. Even though active sand provided by instruments aboard Opportunity at En- transport was observed at the surface [2], it is not clear deavour Crater, Terra Meridiani and Curiosity in Gale whether all of the preserved aeolian bedforms are ac- crater. tive. In particular, transverse aeolian ridges have been We use Hapke’s bidirectional reflectance spectros- suggested to be remnant dunes that formed under past copy theory [6] to invert for optical constants of miner- climatic conditions [3]. als from laboratory spectra [e.g., 7, 8]. These are used Sand transport is largely controlled by the size and to compute single scattering albedos of mineral the density of the grains [4]. Moreover, dunes and rip- endmember components of varying grain sizes. We use ples form in unimodally distributed sand particles from an atmospheric radiative transfer approach, DISORT different instabilities, and the wavelengths of these [9], to correct the CRISM spectra for the effects of the different bedforms do not have the same dependence Martian atmosphere. -
Sitka National Historical Park the Archeology of the Fort Unit: Volume I: Results of the 2005-2008 Inventory
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln U.S. National Park Service Publications and Papers National Park Service 2010 Sitka National Historical Park The Archeology Of The Fort Unit: Volume I: Results Of The 2005-2008 Inventory William J. Hunt Jr. National Park Service, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/natlpark Hunt, William J. Jr., "Sitka National Historical Park The Archeology Of The Fort Unit: Volume I: Results Of The 2005-2008 Inventory" (2010). U.S. National Park Service Publications and Papers. 89. https://digitalcommons.unl.edu/natlpark/89 This Article is brought to you for free and open access by the National Park Service at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in U.S. National Park Service Publications and Papers by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. SITKA NATIONAL HISTORICAL PARK THE ARCHEOLOGY OF THE FORT UNIT VOLUME I: RESULTS OF THE 2005-2008 INVENTORY by William J. Hunt, Jr. Midwest Archeological Center Occasional Studies No. 35 Volume 1 NATIONAL PARK SERVICE Midwest Archeological Center United States Department of the Interior National Park Service Midwest Archeological Center Lincoln, Nebraska 2010 This report has been reviewed against the criteria contained in 43CFR Part 7, Subpart A, Section 7.18 (a) (1) and, upon recommendation of the Midwest Regional Office and the Midwest Archeological Center, has been classified as Available Making the report available meets the criteria of 43CFR Part 7, Subpart A, Section 7.18 (a) (1). ABSTRACT In 2005, SITK invited the National Park Service’s (NPS) Midwest Archeological Center (MWAC) to conduct a Systemwide Archeological Inventory Program (SAIP) parkwide inventory at the park’s Fort Site Unit. -
Sustaining America's Urban Trees and Forests
United States Department of SSustainingustaining AAmerica’smerica’s Agriculture Forest Service UUrbanrban TTreesrees andand ForestsForests Northern Research Station State and Private Forestry General Technical DDavidavid J.J. NNowak,owak, SusanSusan M.M. Stein,Stein, PaulaPaula B.B. Randler,Randler, EricEric J.J. GreenGreenfi eeld,ld, Report NRS-62 SSaraara JJ.. CComas,omas, MMaryary AA.. CCarr,arr, aandnd RRalphalph J.J. AligAlig June 2010 A Forests on the Edge Report ABSTRACT Nowak, David J.; Stein, Susan M.; Randler, Paula B.; Greenfi eld, Eric J.; Comas, Sara J.; Carr, Mary A.; Alig, Ralph J. 2010. Sustaining America’s urban trees and forests: a Forests on the Edge report. Gen. Tech. Rep. NRS-62. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 27 p. Close to 80 percent of the U.S. population lives in urban areas and depends on the essential ecological, economic, and social benefi ts provided by urban trees and forests. However, the distribution of urban tree cover and the benefi ts of urban forests vary across the United States, as do the challenges of sustaining this important resource. As urban areas expand across the country, the importance of the benefi ts that urban forests provide, as well as the challenges to their conservation and maintenance, will increase. The purpose of this report is to provide an overview of the current status and benefi ts of America’s urban forests, compare differences in urban forest canopy cover among regions, and discuss challenges facing urban forests and their implications for urban forest management. Key Words: Urban forest, urbanization, land Lisa DeJong The Plain Dealer, Photo: AP management, ecosystem services Urban forests offer aesthetic values and critical services. -
Interpretations of Gravity Anomalies at Olympus Mons, Mars: Intrusions, Impact Basins, and Troughs
Lunar and Planetary Science XXXIII (2002) 2024.pdf INTERPRETATIONS OF GRAVITY ANOMALIES AT OLYMPUS MONS, MARS: INTRUSIONS, IMPACT BASINS, AND TROUGHS. P. J. McGovern, Lunar and Planetary Institute, Houston TX 77058-1113, USA, ([email protected]). Summary. New high-resolution gravity and topography We model the response of the lithosphere to topographic loads data from the Mars Global Surveyor (MGS) mission allow a re- via a thin spherical-shell flexure formulation [9, 12], obtain- ¡g examination of compensation and subsurface structure models ing a model Bouguer gravity anomaly ( bÑ ). The resid- ¡g ¡g ¡g bÓ bÑ in the vicinity of Olympus Mons. ual Bouguer anomaly bÖ (equal to - ) can be Introduction. Olympus Mons is a shield volcano of enor- mapped to topographic relief on a subsurface density interface, using a downward-continuation filter [11]. To account for the mous height (> 20 km) and lateral extent (600-800 km), lo- cated northwest of the Tharsis rise. A scarp with height up presence of a buried basin, we expand the topography of a hole Ö h h ¼ ¼ to 10 km defines the base of the edifice. Lobes of material with radius and depth into spherical harmonics iÐÑ up h with blocky to lineated morphology surround the edifice [1-2]. to degree and order 60. We treat iÐÑ as the initial surface re- Such deposits, known as the Olympus Mons aureole deposits lief, which is compensated by initial relief on the crust mantle =´ µh c Ñ c (hereinafter abbreviated as OMAD), are of greatest extent to boundary of magnitude iÐÑ . These interfaces the north and west of the edifice. -
FPS Sitegrid Methods for Forest Inventory, Forest Growth and Forest Planning
FPS SiteGrid Methods for Forest Inventory, Forest Growth And Forest Planning Extract from The Forester’s Guidebook December 14, 2015 by James D. Arney, Ph.D. Forest Biometrics Research Institute 4033 SW Canyon Road Portland, Oregon 97221 (503) 227-0622 www.forestbiometrics.org Information contained in this document is subject to change without notice and does not represent a commitment on behalf of the Forest Biometrics Research Institute, Portland, Oregon. No part of this document may be transmitted in any form or by any means, electronic or mechanical, including photocopying, without the expressed written permission of the Forest Biometrics Research Institute, 4033 SW Canyon Road, Portland, Oregon 97221. Copyright 2010 – 2015 Forest Biometrics Research Institute. All rights reserved worldwide. Printed in the United States. Forest Biometrics Research Institute (FBRI) is an IRS 501 (c) 3 tax-exempt public research corporation dedicated to research, education and service to the forest industry. Forest Projection and Planning System (FPS) is a registered trademark of Forest Biometrics Research Institute (FBRI), Portland, Oregon. Microsoft Access is a registered trademark of Microsoft Corporation. Windows and Windows 7 are registered trademarks of Microsoft Corporation. Open Database Connectivity (ODBC) is a registered trademark of Microsoft Corporation. ArcMap is a registered trademark of the Environmental Services Research Institute. MapInfo Professional is a registered trademark of MapInfo Corporation. Stand Visualization System (SVS) is a product of the USDA Forest Service, Pacific Northwest Forest and Range Experiment Station. Trademark names are used editorially, to the benefit of the trademark owner, with no intent to infringe on the Trademark. Technical Support: Telephone: (406) 541-0054 Forest Biometrics Research Institute Corporate: (503) 227-0622 URL: http://www.forestbiometrics.org e-mail: [email protected] Access: 08:00-16:00 PST Monday to Friday ii FBRI – FPS Forester’s SiteGrid 2015 Background of Author: In summary, Dr. -
Sinuous Ridges in Chukhung Crater, Tempe Terra, Mars: Implications for Fluvial, Glacial, and Glaciofluvial Activity Frances E.G
Sinuous ridges in Chukhung crater, Tempe Terra, Mars: Implications for fluvial, glacial, and glaciofluvial activity Frances E.G. Butcher, Matthew Balme, Susan Conway, Colman Gallagher, Neil Arnold, Robert Storrar, Stephen Lewis, Axel Hagermann, Joel Davis To cite this version: Frances E.G. Butcher, Matthew Balme, Susan Conway, Colman Gallagher, Neil Arnold, et al.. Sinuous ridges in Chukhung crater, Tempe Terra, Mars: Implications for fluvial, glacial, and glaciofluvial activity. Icarus, Elsevier, 2021, 10.1016/j.icarus.2020.114131. hal-02958862 HAL Id: hal-02958862 https://hal.archives-ouvertes.fr/hal-02958862 Submitted on 6 Oct 2020 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. 1 Sinuous Ridges in Chukhung Crater, Tempe Terra, Mars: 2 Implications for Fluvial, Glacial, and Glaciofluvial Activity. 3 Frances E. G. Butcher1,2, Matthew R. Balme1, Susan J. Conway3, Colman Gallagher4,5, Neil 4 S. Arnold6, Robert D. Storrar7, Stephen R. Lewis1, Axel Hagermann8, Joel M. Davis9. 5 1. School of Physical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6 6AA, UK. 7 2. Current address: Department of Geography, The University of Sheffield, Sheffield, S10 8 2TN, UK ([email protected]). -
Article 3 Definitions
1 Commentary is for information only. Proposed new language is double-underlined; Proposed deleted language is stricken. ORDINANCE NO. XX AMENDMENTS TO VOLUME 3 DEVELOPMENT CODE OF THE GRESHAM COMMUNITY DEVELOPMENT PLAN, REGARDING THE DEVELOPMENT CODE IMPROVEMENT PROJECT-6 TREE CODE UPDATE THE CITY OF GRESHAM DOES ORDAIN AS FOLLOWS Section 1. Volume 3, Section 3.0100 is amended as follows: Proposed Text Amendment Commentary ARTICLE 3 DEFINITIONS 3.0150 Tree Related Terms and Definitions [3.01]-1 *** ” D. Tree Related Terms and Definitions. Section 3.0150 *** Buffer Tree – See Tree [3.01]-2 - [3.01]-6 *** Tree Caliper – See Tree *** Clear Cutting – See Tree Related Section 3.0150 Definitions, *** Critical Root Zone – See Tree Related Definitions, Section 3.0150 Crosswalk *** Crown Cover – See Tree Related Definitions, Section 3.0150 *** Diameter Breast Height – See Tree Related Definitions, Section 3.0150 *** DRAFT - City of Gresham Development Code (10/29/14 open house review) 2 Dripline – See Tree Related Section 3.0150 Definitions, *** Major Tree – See Tree *** Hazardous Tree – See Tree *** Hogan Cedar Tree – See Tree *** Imminent Hazard Tree – See *** Tree *** Pruning – See Tree Related Definitions, Section 3.0150 *** Regulated Tree – See Tree *** Ornamental Tree – See Tree *** – See Tree Parking Lot Tree *** Perimeter Tree – See Tree *** Severe Crown Reduction – See Tree Related Definitions, Section 3.0150 *** Shade Tree – See Tree *** Significant Tree, Significant Grove – See Tree *** Stand - See Tree Related Definitions, Section -
Site Potential Tree Heights WP
WHITE PAPER F14-SO-WP-SILV-33 Site Potential Tree Height Estimates for the Pomeroy and Walla Walla Ranger Districts 1 David C. Powell and Betsy Kaiser, Silviculturists Supervisor’s Office; Pendleton, OR Initial Version: NOVEMBER 2006 Most Recent Revision: FEBRUARY 2017 CONTENTS Introduction .................................................................................................................................... 2 Analysis assumptions ...................................................................................................................... 2 Table 1: Source of site index curves for tree species of the Umatilla National Forest ............ 3 Data Sources ................................................................................................................................... 4 Figure 1 – Location and distribution of CVS plots, and river and stream segments ................ 5 Analysis Methodology ..................................................................................................................... 6 Results ............................................................................................................................................. 6 Table 2 – Site index measurements for CVS site trees within buffered stream areas ............. 8 Table 3 – CVS site trees not used in the site potential tree height analysis ........................... 15 References ................................................................................................................................... -
Sass Forestecomgt 2018.Pdf
Forest Ecology and Management 419–420 (2018) 31–41 Contents lists available at ScienceDirect Forest Ecology and Management journal homepage: www.elsevier.com/locate/foreco Lasting legacies of historical clearcutting, wind, and salvage logging on old- T growth Tsuga canadensis-Pinus strobus forests ⁎ Emma M. Sassa, , Anthony W. D'Amatoa, David R. Fosterb a Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT 05405, USA b Harvard Forest, Harvard University, 324 N Main St, Petersham, MA 01366, USA ARTICLE INFO ABSTRACT Keywords: Disturbance events affect forest composition and structure across a range of spatial and temporal scales, and Coarse woody debris subsequent forest development may differ after natural, anthropogenic, or compound disturbances. Following Compound disturbance large, natural disturbances, salvage logging is a common and often controversial management practice in many Forest structure regions of the globe. Yet, while the short-term impacts of salvage logging have been studied in many systems, the Large, infrequent natural disturbance long-term effects remain unclear. We capitalized on over eighty years of data following an old-growth Tsuga Pine-hemlock forests canadensis-Pinus strobus forest in southwestern New Hampshire, USA after the 1938 hurricane, which severely Pit and mound structures damaged forests across much of New England. To our knowledge, this study provides the longest evaluation of salvage logging impacts, and it highlights developmental trajectories for Tsuga canadensis-Pinus strobus forests under a variety of disturbance histories. Specifically, we examined development from an old-growth condition in 1930 through 2016 across three different disturbance histories: (1) clearcut logging prior to the 1938 hurricane with some subsequent damage by the hurricane (“logged”), (2) severe damage from the 1938 hurricane (“hurricane”), and (3) severe damage from the hurricane followed by salvage logging (“salvaged”). -
Sitka Area Fishing Guide
THE SITKA AREA ................................................................................................................................................................... 3 ROADSIDE FISHING .............................................................................................................................................................. 4 ROADSIDE FISHING IN FRESH WATERS .................................................................................................................................... 4 Blue Lake ........................................................................................................................................................................... 4 Beaver Lake ....................................................................................................................................................................... 4 Sawmill Creek .................................................................................................................................................................... 5 Thimbleberry and Heart Lakes .......................................................................................................................................... 5 Indian River ....................................................................................................................................................................... 5 Swan Lake ......................................................................................................................................................................... -
Acidic Fluids Across Mars: Detections of Magnesium-Nickel Sulfates
ACIDIC FLUIDS ACROSS MARS: DETECTIONS OF MAGNESIUM-NICKEL SULFATES. A. S. Yen1, D. W. Ming2, R. Gellert3, D. W. Mittlefehldt2, E. B. Rampe4, D. T. Vaniman5, L. M. Thompson6, R. V. Morris2, B. C. Clark7, S. J. VanBommel3, R. E. Arvidson8, 1JPL- Caltech ([email protected]), 2NASA-JSC, 3University of Guelph, 4Aerodyne Industries, 5Planetary Science Institute, 6University of New Brunswick, 7Space Science Insti- tute, 7Washington University in St. Louis. Introduction: Calcium, magnesium and ferric iron sulfates have been detected by the instrument suites on the Mars rovers. A subset of the magnesium sulfates show clear associations with nickel. These associations indicate Ni2+ co-precipitation with or substitution for Mg2+ from sulfate-saturated solutions. Nickel is ex- tracted from primary rocks almost exclusively at pH values less than 6, constraining the formation of these Mg-Ni sulfates to mildly to strongly acidic conditions. There is clear evidence for aqueous alteration at the rim of Endeavour Crater (Meridiani Planum), in the Murray formation mudstone (Gale Crater), and near Home Plate (Gusev Crater). The discovery of Mg-Ni sulfates at these locations indicates a history of fluid- rock interactions at low pH. Fig 1: Histogram showing significant concentrations Mars Rovers: The Mars Exploration Rovers of sulfur in APXS analyses by the three Mars rovers (MER), Spirit and Opportunity, landed in January 2004 (mean value: 6.6%). at Gusev Crater and Meridiani Planum, respectively. Spirit traversed over 7.7 km through 2210 sols of sur- face operations, and Opportunity is currently on the degraded rim of Endeavour Crater after 4600 sols and 44 km of traverse. -
Mars Reconnaissance Orbiter and Opportunity Observations Of
PUBLICATIONS Journal of Geophysical Research: Planets RESEARCH ARTICLE Mars Reconnaissance Orbiter and Opportunity 10.1002/2014JE004686 observations of the Burns formation: Crater Key Point: hopping at Meridiani Planum • Hydrated Mg and Ca sulfate Burns formation minerals mapped with MRO R. E. Arvidson1, J. F. Bell III2, J. G. Catalano1, B. C. Clark3, V. K. Fox1, R. Gellert4, J. P. Grotzinger5, and MER data E. A. Guinness1, K. E. Herkenhoff6, A. H. Knoll7, M. G. A. Lapotre5, S. M. McLennan8, D. W. Ming9, R. V. Morris9, S. L. Murchie10, K. E. Powell1, M. D. Smith11, S. W. Squyres12, M. J. Wolff3, and J. J. Wray13 1 2 Correspondence to: Department of Earth and Planetary Sciences, Washington University in Saint Louis, Missouri, USA, School of Earth and Space R. E. Arvidson, Exploration, Arizona State University, Tempe, Arizona, USA, 3Space Science Institute, Boulder, Colorado, USA, 4Department of [email protected] Physics, University of Guelph, Guelph, Ontario, Canada, 5Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA, 6U.S. Geological Survey, Astrogeology Science Center, Flagstaff, Arizona, USA, 7 8 Citation: Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts, USA, Department Arvidson, R. E., et al. (2015), Mars of Geosciences, Stony Brook University, Stony Brook, New York, USA, 9NASA Johnson Space Center, Houston, Texas, USA, Reconnaissance Orbiter and Opportunity 10Applied Physics Laboratory, Johns Hopkins University, Laurel, Maryland, USA, 11NASA Goddard Space Flight Center, observations of the Burns formation: Greenbelt, Maryland, USA, 12Department of Astronomy, Cornell University, Ithaca, New York, USA, 13School of Earth and Crater hopping at Meridiani Planum, J.