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Blue Intensity for Dendroclimatology: Should We Have the Blues?
Dendrochronologia 32 (2014) 191–204 Contents lists available at ScienceDirect Dendrochronologia jou rnal homepage: www.elsevier.com/locate/dendro ORIGINAL ARTICLE Blue intensity for dendroclimatology: Should we have the blues? Experiments from Scotland a,∗ b c c Milosˇ Rydval , Lars-Åke Larsson , Laura McGlynn , Björn E. Gunnarson , d d a Neil J. Loader , Giles H.F. Young , Rob Wilson a School of Geography and Geosciences, University of St Andrews, UK b Cybis Elektronik & Data AB, Saltsjöbaden, Sweden c Department of Physical Geography and Quaternary Geology, Stockholm University, Stockholm, Sweden d Department of Geography, Swansea University, Swansea, UK a r t i c l e i n f o a b s t r a c t Article history: Blue intensity (BI) has the potential to provide information on past summer temperatures of a similar Received 1 April 2014 quality to maximum latewood density (MXD), but at a substantially reduced cost. This paper provides Accepted 27 April 2014 a methodological guide to the generation of BI data using a new and affordable BI measurement sys- tem; CooRecorder. Focussing on four sites in the Scottish Highlands from a wider network of 42 sites Keywords: developed for the Scottish Pine Project, BI and MXD data from Scots pine (Pinus sylvestris L.) were used Blue intensity to facilitate a direct comparison between these parameters. A series of experiments aimed at identify- Maximum latewood density ing and addressing the limitations of BI suggest that while some potential limitations exist, these can Scots pine Dendroclimatology be minimised by adhering to appropriate BI generation protocols. The comparison of BI data produced using different resin-extraction methods (acetone vs. -
An Archaeological Inventory of Alamance County, North Carolina
AN ARCHAEOLOGICAL INVENTORY OF ALAMANCE COUNTY, NORTH CAROLINA Alamance County Historic Properties Commission August, 2019 AN ARCHAEOLOGICAL INVENTORY OF ALAMANCE COUNTY, NORTH CAROLINA A SPECIAL PROJECT OF THE ALAMANCE COUNTY HISTORIC PROPERTIES COMMISSION August 5, 2019 This inventory is an update of the Alamance County Archaeological Survey Project, published by the Research Laboratories of Anthropology, UNC-Chapel Hill in 1986 (McManus and Long 1986). The survey project collected information on 65 archaeological sites. A total of 177 archaeological sites had been recorded prior to the 1986 project making a total of 242 sites on file at the end of the survey work. Since that time, other archaeological sites have been added to the North Carolina site files at the Office of State Archaeology, Department of Natural and Cultural Resources in Raleigh. The updated inventory presented here includes 410 sites across the county and serves to make the information current. Most of the information in this document is from the original survey and site forms on file at the Office of State Archaeology and may not reflect the current conditions of some of the sites. This updated inventory was undertaken as a Special Project by members of the Alamance County Historic Properties Commission (HPC) and published in-house by the Alamance County Planning Department. The goals of this project are three-fold and include: 1) to make the archaeological and cultural heritage of the county more accessible to its citizens; 2) to serve as a planning tool for the Alamance County Planning Department and provide aid in preservation and conservation efforts by the county planners; and 3) to serve as a research tool for scholars studying the prehistory and history of Alamance County. -
Oxygen Isotope Evidence for Paleoclimate Change During The
PALEOCLIMATE RECONSTRUCTION IN NORTHWEST SCOTLAND AND SOUTHWEST FLORIDA DURING THE LATE HOLOCENE Ting Wang A dissertation submitted to the faculty of the University of North Carolina at Chapel Hill in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Geological Sciences. Chapel Hill 2011 Approved by: Dr. Donna M. Surge Dr. Joseph G. Carter Dr. Jose A. Rial Dr. Justin B. Ries Dr. Karen J. Walker © 2011 Ting Wang ALL RIGHTS RESERVED ii ABSTRACT TING WANG: Paleoclimate Reconstruction in Northwest Scotland and Southwest Florida during the Late Holocene (Under the direction of Dr. Donna M. Surge) The study reconstructed seasonal climate change in mid-latitude northwest Scotland during the climate episodes Neoglacial (~3300-2500 BP) and Roman Warm Period (RWP; ~2500-1600 BP) and in subtropical southwest Florida during the latter part of RWP (1-550 AD) based on archaeological shell accumulations in two study areas. In northwest Scotland, seasonal sea surface temperature (SST) during the Neoglacial and RWP was estimated from high-resolution oxygen isotope ratios (δ18O) of radiocarbon-dated limpet (Patella vulgata) shells accumulated in a cave dwelling on the Isle of Mull. The SST results revealed a cooling transition from the Neoglacial to RWP, which is supported by earlier studies of pine pollen in Scotland and European glacial events and also coincident with the abrupt climate deterioration at 2800-2700 BP. The cooling transition might have been driven by decreased solar radiation and weakened North Atlantic Oscillation (NAO) conditions. In southwest Florida, seasonal-scale climate conditions for the latter part of RWP were reconstructed by using high-resolution δ18O of archaeological shells (Mercenaria campechiensis) and otoliths (Ariopsis felis). -
The Disclosure of Climate Data from the Climatic Research Unit at the University of East Anglia
House of Commons Science and Technology Committee The disclosure of climate data from the Climatic Research Unit at the University of East Anglia Eighth Report of Session 2009–10 Volume II Oral and written evidence Ordered by The House of Commons to be printed 24 March 2010 HC 387-II Published on 31 March 2010 by authority of the House of Commons London: The Stationery Office Limited £0.00 The Science and Technology Committee The Science and Technology Committee is appointed by the House of Commons to examine the expenditure, administration and policy of the Government Office for Science. Under arrangements agreed by the House on 25 June 2009 the Science and Technology Committee was established on 1 October 2009 with the same membership and Chairman as the former Innovation, Universities, Science and Skills Committee and its proceedings were deemed to have been in respect of the Science and Technology Committee. Current membership Mr Phil Willis (Liberal Democrat, Harrogate and Knaresborough)(Chair) Dr Roberta Blackman-Woods (Labour, City of Durham) Mr Tim Boswell (Conservative, Daventry) Mr Ian Cawsey (Labour, Brigg & Goole) Mrs Nadine Dorries (Conservative, Mid Bedfordshire) Dr Evan Harris (Liberal Democrat, Oxford West & Abingdon) Dr Brian Iddon (Labour, Bolton South East) Mr Gordon Marsden (Labour, Blackpool South) Dr Doug Naysmith (Labour, Bristol North West) Dr Bob Spink (Independent, Castle Point) Ian Stewart (Labour, Eccles) Graham Stringer (Labour, Manchester, Blackley) Dr Desmond Turner (Labour, Brighton Kemptown) Mr Rob Wilson (Conservative, Reading East) Powers The Committee is one of the departmental Select Committees, the powers of which are set out in House of Commons Standing Orders, principally in SO No.152. -
Volume 3: Process Issues Raised by Petitioners
EPA’s Response to the Petitions to Reconsider the Endangerment and Cause or Contribute Findings for Greenhouse Gases under Section 202(a) of the Clean Air Act Volume 3: Process Issues Raised by Petitioners U.S. Environmental Protection Agency Office of Atmospheric Programs Climate Change Division Washington, D.C. 1 TABLE OF CONTENTS Page 3.0 Process Issues Raised by Petitioners............................................................................................5 3.1 Approaches and Processes Used to Develop the Scientific Support for the Findings............................................................................................................................5 3.1.1 Overview..............................................................................................................5 3.1.2 Issues Regarding Consideration of the CRU E-mails..........................................6 3.1.3 Assessment of Issues Raised in Public Comments and Re-Raised in Petitions for Reconsideration...............................................................................7 3.1.4 Summary............................................................................................................19 3.2 Response to Claims That the Assessments by the USGCRP and NRC Are Not Separate and Independent Assessments.........................................................................20 3.2.1 Overview............................................................................................................20 3.2.2 EPA’s Response to Petitioners’ -
Temporal Scales and Signal Modeling in Dendroclimatology Joel Guiot
Temporal scales and signal modeling in dendroclimatology Joel Guiot To cite this version: Joel Guiot. Temporal scales and signal modeling in dendroclimatology. Past Global Changes Mag- azine, Past Global Changes (PAGES) project, 2017, 25 (3), pp.142-143. 10.22498/pages.25.3.142. insu-02269697 HAL Id: insu-02269697 https://hal-insu.archives-ouvertes.fr/insu-02269697 Submitted on 23 Aug 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. 142 SCIENCE HIGHLIGHTS: CENTENNIAL TO MILLENNIAL CLIMATE VARIABILITY https://doi.org/10.22498/pages.25.3.142 Temporal scales and signal modeling in dendroclimatology Joël Guiot Tree rings are demonstrably good proxies for temperature or precipitation at timescales less than a century. Reconstruction based on multiple proxies and process-based modeling approaches are needed to estimate the climate signal at lower frequencies. Paleoclimatological proxies "represent component of the trend. Afterwards, the method is complex and needs a large records of climate that were generated tree leaf area stabilizes, and a fairly con- number of replicated series for the same through physical, chemical and/or biologi- stant quantity of xylem is distributed along species. No method is perfect and some cal processes. -
Global Dendroclimatology in Sight from A
780 Nature Vol. 287 30 October 1980 Global dendroclimatology in sight from A. Barrie Pittock Dendroclimatology, the systematic study pressure and that sampling should be con calibration and earlier instrumental and of past climates using tree growth centrated in regions which are historical data for verification, it should be characteristics as proxy climate data, is a climatologically important and/or where possible to produce a detailed and relatively young science. It is often there are gaps in coverage from instru continuous climate reconstruction from confused with the much older and related mental, historical or other proxy data. 1750. Because of the abundance of data for science of dendrochronology, the dating of There is growing confidence that with some calibration and verification, this could specimens by the use of tree-ring modification existing methods can extract prove the best continent-wide proxy sequences. Dendroclimatology has only useful climatic information from trees in climate data set in existence and Europe really developed as a science since the many different parts of the world. could become a test bed for refining 1940s, primarily as a result of the As dendroclimatology has expanded dendroclimatic methods. pioneering efforts of workers at the into new geographical areas over the last Five-hundred-year long chronologies Laboratory of Tree-Ring Research at the decade, techniques have been modified are available already from living conifers in University of Arizona. Elsewhere, the and refined. One example is the use of the Alps and at the northern tree-line and serious application of dendroclimatic density as well as ring-width measurements are expected from living oaks in Scotland, methods has only begun in the last five for climate reconstructions. -
ICLEA Final Symposium 2017
STR17/03 Markus J. Schwab, Mirosław Błaszkiewicz, Thomas Raab, Martin Wilmking, Achim Brauer (eds.) ICLEA Final Symposium 2017 Climate Change, Human Impact and Landscape Evolution in the Southern Baltic Lowlands Abstract Volume & Excursion Guide Scientific Technical Report STR17/03 ISSN 2190-71101610-0956 2017 Final Symposium ICLEA al., et Schwab M. J. www.gfz-potsdam.de Recommended citation: Schwab, M. J., Błaszkiewicz, M., Raab, T., Wilmking, M., Brauer, A. (Eds.) (2017), ICLEA Final Symposium 2017: Abstract Volume & Excursion Guide. Scientific Technical Report STR 17/03, GFZ German Research Centre for Geosciences. DOI: http://doi.org/10.2312/GFZ.b103-17037. Imprint Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences Telegrafenberg D-14473 Potsdam Published in Potsdam, Germany June 2017 ISSN 2190-7110 DOI: http://doi.org/10.2312/GFZ.b103-17037 URN: urn:nbn:de:kobv:b103-17037 This work is published in the GFZ series Scientific Technical Report (STR) and electronically available at GFZ website www.gfz-potsdam.de Markus J. Schwab, Mirosław Błaszkiewicz, Thomas Raab, Martin Wilmking, Achim Brauer (eds.) ICLEA Final Symposium 2017 Climate Change, Human Impact and Landscape Evolution in the Southern Baltic Lowlands Abstract Volume & Excursion Guide Scientific Technical Report STR17/03 Virtual Institute of Integrated Climate and Landscape Evolution Analyses ‐ICLEA‐ A Virtual Institute within the Helmholtz Association ICLEA Final Symposium 2017 Climate Change, Human Impact and Landscape Evolution in the Southern Baltic Lowlands Abstract Volume & Excursion Guide Edited by Markus J. Schwab, Mirosław Błaszkiewicz, Thomas Raab, Martin Wilmking, Achim Brauer 7‐9 June 2017, GFZ German Research Centre for Geosciences, Potsdam, Germany 2 ICLEA Final Symposium 2017 ‐ GFZ German Research Centre for Geosciences, Potsdam, Germany Table of Contents Page Table of Contents ……………………………………………………….……………………..…...….…………………………. -
Bibliography [PDF]
Bibliography, Ancient TL, Vol. 36, No. 2, 2018 Bibliography _____________________________________________________________________________________________________ Compiled by Sebastien Huot From 15th May 2018 to 30th November 2018 Various geological applications - aeolian Bernhardson, M., Alexanderson, H., 2018. Early Holocene NW-W winds reconstructed from small dune fields, central Sweden. Boreas 47, 869-883, http://doi.org/10.1111/bor.12307 Bosq, M., Bertran, P., Degeai, J.-P., Kreutzer, S., Queffelec, A., Moine, O., Morin, E., 2018. Last Glacial aeolian landforms and deposits in the Rhône Valley (SE France): Spatial distribution and grain-size characterization. Geomorphology 318, 250-269, http://doi.org/10.1016/j.geomorph.2018.06.010 Breuning-Madsen, H., Bird, K.L., Balstrøm, T., Elberling, B., Kroon, A., Lei, E.B., 2018. Development of plateau dunes controlled by iron pan formation and changes in land use and climate. CATENA 171, 580- 587, http://doi.org/10.1016/j.catena.2018.07.011 Ellwein, A., McFadden, L., McAuliffe, J., Mahan, S., 2018. Late Quaternary Soil Development Enhances Aeolian Landform Stability, Moenkopi Plateau, Southern Colorado Plateau, USA. Geosciences 8, 146, http://www.mdpi.com/2076-3263/8/5/146 Kasse, C., Tebbens, L.A., Tump, M., Deeben, J., Derese, C., De Grave, J., Vandenberghe, D., 2018. Late Glacial and Holocene aeolian deposition and soil formation in relation to the Late Palaeolithic Ahrensburg occupation, site Geldrop-A2, the Netherlands. 97, 3-29, http://doi.org/10.1017/njg.2018.1 Pilote, L.-M., Garneau, M., Van Bellen, S., Lamothe, M., 2018. Multiproxy analysis of inception and development of the Lac-à-la-Tortue peatland complex, St Lawrence Lowlands, eastern Canada. -
Rach Et Al QSR Revised
1 Hydrological and ecological changes in Western Europe between 3200 2 and 2000 years BP derived from lipid biomarker δD values in Lake 3 Meerfelder Maar sediments 4 5 6 O. Rach1,2*, S. Engels3, A. Kahmen4, A. Brauer5, C. Martín-Puertas5,6, B. van 7 Geel7, D. Sachse1 8 9 1GFZ German Research Centre for Geosciences, Section 5.1, 10 Geomorphology, Organic Surface Geochemistry Lab, Telegrafenberg, D- 11 14473 Potsdam, Germany 12 2Institute for Earth- and Environmental Science, University of Potsdam, Karl- 13 Liebknecht-Strasse 24-25, 14476 Potsdam (Germany) 14 3Centre for Environmental Geochemistry, School of Geography, University of 15 Nottingham, University Park, Nottingham (UK) 16 4Botany – Department of Environmental Sciences, University of Basel, 17 Schönbeinstrasse 6, 4056 Basel (Switzerland) 18 5GFZ German Research Centre for Geosciences, Section 5.2 Climate 19 Dynamics and Landscape Evolution, Telegrafenberg, 14473 Potsdam 20 (Germany) 21 6Department of Geography, Royal Holloway, University of London, Egham, 22 Surrey TW20 0EX, United Kingdom. 23 7Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, 24 Science Park 904, 1098 XH Amsterdam (Netherlands) 25 26 * Corresponding author’s email address: [email protected] 27 28 29 Highlights 30 - We present a high-resolution late Holocene biomarker δD record from 31 W Europe 1 32 - Terrestrial biomarker δDterr records minor hydrological changes 33 between 3.2-2.0 cal ka BP 34 - δDterr data are in agreement with other paleoecological data 35 - We observe significant effects of aquatic lipid source changes on the 36 δDaq record 37 - Multiproxy approaches are essential to avoid hydrological 38 misinterpretations 39 40 41 Keywords 42 Holocene; Climate dynamics; Paleoclimatology; Western Europe; Continental 43 biomarkers; Organic geochemistry; Stable isotopes; Vegetation dynamics 44 45 46 47 Abstract 48 One of the most significant Late Holocene climate shifts occurred around 49 2800 years ago, when cooler and wetter climate conditions established in 50 western Europe. -
Application of Dendroclimatology in Evaluation of Climatic Changes
JOURNAL OF FOREST SCIENCE, 64, 2018 (3): 139–147 https://doi.org/10.17221/79/2017-JFS Application of dendroclimatology in evaluation of climatic changes Mohammad Reza KHALEGHI* Department of Watershed Management Engineering, Faculty of Natural Resources, Torbat-e-Jam Branch, Islamic Azad University, Torbat-e-Jam, Iran *Corresponding author: [email protected] Abstract Khaleghi M.R. (2018): Application of dendroclimatology in evaluation of climatic changes. J. For. Sci., 64: 139–147. The present study tends to describe the survey of climatic changes in the case of the Bojnourd region of North Kho- rasan, Iran. Climate change due to a fragile ecosystem in semi-arid and arid regions such as Iran is one of the most challenging climatological and hydrological problems. Dendrochronology, which uses tree rings to their exact year of formation to analyse temporal and spatial patterns of processes in the physical and cultural sciences, can be used to evaluate the effects of climate change. In this study, the effects of climate change were simulated using dendrochro- nology (tree rings) and an artificial neural network (ANN) for the period from 1800 to 2015. The present study was executed using the Quercus castaneifolia C.A. Meyer. Tree-ring width, temperature, and precipitation were the input parameters for the study, and climate change parameters were the outputs. After the training process, the model was verified. The verified network and tree rings were used to simulate climatic parameter changes during the past times. The results showed that the integration of dendroclimatology and an ANN renders a high degree of accuracy and ef- ficiency in the simulation of climate change. -
A Stable Isotope-Based Approach to Tropical Dendroclimatology
Geochimica et Cosmochimica Acta, Vol. 68, No. 16, pp. 3295–3305, 2004 Copyright © 2004 Elsevier Ltd Pergamon Printed in the USA. All rights reserved 0016-7037/04 $30.00 ϩ .00 doi:10.1016/j.gca.2004.01.006 A stable isotope-based approach to tropical dendroclimatology 1, 2 MICHAEL N. EVANS * and DANIEL P. SCHRAG 1Laboratory of Tree-Ring Research, The University of Arizona, 105 W. Stadium, Tucson, AZ 85721, USA 2Department of Earth and Planetary Sciences, Harvard University, 20 Oxford St., Cambridge, MA 02138, USA (Received June 6, 2003; accepted in revised form January 6, 2004) Abstract—We describe a strategy for development of chronological control in tropical trees lacking demon- strably annual ring formation, using high resolution ␦18O measurements in tropical wood. The approach applies existing models of the oxygen isotopic composition of alpha-cellulose (Roden et al., 2000), a rapid method for cellulose extraction from raw wood (Brendel et al., 2000), and continuous flow isotope ratio mass spectrometry (Brenna et al., 1998) to develop proxy chronological, rainfall and growth rate estimates from tropical trees lacking visible annual ring structure. Consistent with model predictions, pilot datasets from the temperate US and Costa Rica having independent chronological control suggest that observed cyclic isotopic signatures of several permil (SMOW) represent the annual cycle of local rainfall and relative humidity. Additional data from a plantation tree of known age from ENSO-sensitive northwestern coastal Peru suggests that the 1997-8 ENSO warm phase event was recorded as an 8‰ anomaly in the ␦18Oof␣-cellulose. The results demonstrate reproducibility of the stable isotopic chronometer over decades, two different climatic zones, and three tropical tree genera, and point to future applications in paleoclimatology.