10 research outputs found

    Data Descriptor: A global multiproxy database for temperature reconstructions of the Common Era

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    Reproducible climate reconstructions of the Common Era (1 CE to present) are key to placing industrial-era warming into the context of natural climatic variability. Here we present a community-sourced database of temperature-sensitive proxy records from the PAGES2k initiative. The database gathers 692 records from 648 locations, including all continental regions and major ocean basins. The records are from trees, ice, sediment, corals, speleothems, documentary evidence, and other archives. They range in length from 50 to 2000 years, with a median of 547 years, while temporal resolution ranges from biweekly to centennial. Nearly half of the proxy time series are significantly correlated with HadCRUT4.2 surface temperature over the period 1850-2014. Global temperature composites show a remarkable degree of coherence between high-and low-resolution archives, with broadly similar patterns across archive types, terrestrial versus marine locations, and screening criteria. The database is suited to investigations of global and regional temperature variability over the Common Era, and is shared in the Linked Paleo Data (LiPD) format, including serializations in Matlab, R and Python.(TABLE)Since the pioneering work of D'Arrigo and Jacoby1-3, as well as Mann et al. 4,5, temperature reconstructions of the Common Era have become a key component of climate assessments6-9. Such reconstructions depend strongly on the composition of the underlying network of climate proxies10, and it is therefore critical for the climate community to have access to a community-vetted, quality-controlled database of temperature-sensitive records stored in a self-describing format. The Past Global Changes (PAGES) 2k consortium, a self-organized, international group of experts, recently assembled such a database, and used it to reconstruct surface temperature over continental-scale regions11 (hereafter, ` PAGES2k-2013').This data descriptor presents version 2.0.0 of the PAGES2k proxy temperature database (Data Citation 1). It augments the PAGES2k-2013 collection of terrestrial records with marine records assembled by the Ocean2k working group at centennial12 and annual13 time scales. In addition to these previously published data compilations, this version includes substantially more records, extensive new metadata, and validation. Furthermore, the selection criteria for records included in this version are applied more uniformly and transparently across regions, resulting in a more cohesive data product.This data descriptor describes the contents of the database, the criteria for inclusion, and quantifies the relation of each record with instrumental temperature. In addition, the paleotemperature time series are summarized as composites to highlight the most salient decadal-to centennial-scale behaviour of the dataset and check mutual consistency between paleoclimate archives. We provide extensive Matlab code to probe the database-processing, filtering and aggregating it in various ways to investigate temperature variability over the Common Era. The unique approach to data stewardship and code-sharing employed here is designed to enable an unprecedented scale of investigation of the temperature history of the Common Era, by the scientific community and citizen-scientists alike

    North Atlantic climate variability recorded in reef corals from Bermuda.

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    Climate sensitive proxies can open windows into tines, for which instrumental observations are lacking. A strong tool for gaining insight into climate changes through the most recent geological period of the past several centuries, is the use of massive reef coral skeletons. The research reported in this thesis analyzes climate sensitive coral proxy records from Bermuda and is directed at characterizing seasonal, inter-annual and long-term climate fluctuations relevant to the western Sargasso Sea. The type of climate proxies used include skeletal growth parameters, i.e. annual growth rates and density, and the stable oxygen and carbon isotope composition (g18O and g13C, respectively) of coral skeletons. Chronologies of annual density and growth rate were analyzed m the skeletons of two colonies of Diploria labyrinthiformis. The records cover the last 150 years, a period where instrumental climate data are available for comparison and evaluation of the proxy records. Annual values of skeletal density and growth rate reveal response to changes in sea surface temperature and the sea surface convective activity near Bermuda, and large-scale North Atlantic atmospheric mass oscillations.13

    Analyse von Verhaltensmustern/Lebensstilen als Teil einer Bildung fuer Nachhaltigkeit im Alltag

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    The research project 'Analysis of behavioral patterns and life styles as an element of education for sustainability in everyday life' has examined the work of sustainability initiatives in the subject area of energy saving both by the Bremen Protestant Church, by Bremen administration authorities and by the Bremen school project '3/4-plus' and in the subject area of 'Local Agenda 21' in Syke and other communities in Lower Saxony. The central objective was to reach new target groups by new educational methods during an intervention phase and to evaluate the successes and failures of these methods. The research principle is based on methods of action research. The goal was to research changes in every-day practice of sustainability initiatives, to document these early in the research process and to reflect them back to the persons concerned in order to optimize the total process. (orig.)Das Forschungsvorhaben 'Analyse von Verhaltensmustern/Lebensstilen als Teil einer Bildung fuer Nachhaltigkeit im Alltag' hat die Arbeit von Nachhaltigkeitsinitiativen im Themenfeld Energiesparen bei der Bremischen Evangelischen Kirche, den Verwaltungen in Bremen und dem Bremer Schulprojekt '3/4-plus' sowie im Themenfeld 'Lokale Agenda 21' in Syke und anderen niedersaechsischen Kommunen begleitet und untersucht. Im Zentrum stand die Absicht, in einer Interventionsphase ueber neue Verfahren von Bildung weitere Zielgruppen fuer nachhaltige Lebensweisen zu gewinnen und dabei die Erfolge und Misserfolge dieser Verfahren zu evaluieren. Der Forschungsansatz basiert auf Methoden der Aktionsforschung. Ziel war es, die Veraenderungen in der Alltagspraxis von Nachhaltigkeitsinitiativen zu erforschen, diese im Verlauf des Forschungsprozesses fruehzeitig zu dokumentieren und an die Betroffenen zurueckzuspiegeln, um den Gesamtprozess zu optimieren. (orig.)SIGLEAvailable from TIB Hannover: RN 8908(2000,386) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Berlin (Germany)DEGerman

    Moeglichkeiten zur Erhoehung des Dynamikpotenzials in Nachhaltigkeitsinitiativen

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    The research project 'Analysis of behavioral patterns and life styles as an element of education for sustainability in everyday life' has examined the work of sustainability initiatives in the subject area of energy saving both by the Bremen Protestant Church, by Bremen administration authorities and by the Bremen school project '3/4-plus' and in the subject area of 'Local Agenda 21' in Syke and other communities in Lower Saxony. The central objective was to reach new target groups by new educational methods during an intervention phase and to evaluate the successes and failures of these methods. The research principle is based on methods of action research. The goal was to research changes in every-day practice of sustainability initiatives, to document these early in the research process and to reflect them back to the persons concerned in order to optimize the total process. (orig.)Das Forschungsvorhaben 'Analyse von Verhaltensmustern/Lebensstilen als Teil einer Bildung fuer Nachhaltigkeit im Alltag' hat die Arbeit von Nachhaltigkeitsinitiativen im Themenfeld Energiesparen bei der Bremischen Evangelischen Kirche, den Verwaltungen in Bremen und dem Bremer Schulprojekt '3/4-plus' sowie im Themenfeld 'Lokale Agenda 21' in Syke und anderen niedersaechsischen Kommunen begleitet und untersucht. Im Zentrum stand die Absicht, in einer Interventionsphase ueber neue Verfahren von Bildung weitere Zielgruppen fuer nachhaltige Lebensweisen zu gewinnen und dabei die Erfolge und Misserfolge dieser Verfahren zu evaluieren. Der Forschungsansatz basiert auf Methoden der Aktionsforschung. Ziel war es, die Veraenderungen in der Alltagspraxis von Nachhaltigkeitsinitiativen zu erforschen, diese im Verlauf des Forschungsprozesses fruehzeitig zu dokumentieren und an die Betroffenen zurueck zu spiegeln, um den Gesamtprozess zu optimieren. (orig.)SIGLEAvailable from TIB Hannover: F03B1570 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Berlin (Germany)DEGerman

    Report and preliminary results of RV Victor Hensen Cruise Jops 2: Leg 6 Fortaleza - Recife, 13.03. - 26.03.95 and Leg 8 Vitoria - Vitoria, 10.04. -23.04.95

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    SIGLEAvailable from TIB Hannover: RO 7630(76) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany); Ministerio de Ciencia e Tecnologia, Brasilia, DF (Brazil); Senckenbergische Naturforschende Gesellschaft (Natur-Museum und Forschungs-Institut), Frankfurt am Main (Germany); Deutsche Forschungsgemeinschaft (DFG), Bonn (Germany)DEGerman

    The Coral Trait Database, a curated database of trait information for coral species from the global oceans.

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    Trait-based approaches advance ecological and evolutionary research because traits provide a strong link to an organism's function and fitness. Trait-based research might lead to a deeper understanding of the functions of, and services provided by, ecosystems, thereby improving management, which is vital in the current era of rapid environmental change. Coral reef scientists have long collected trait data for corals; however, these are difficult to access and often under-utilized in addressing large-scale questions. We present the Coral Trait Database initiative that aims to bring together physiological, morphological, ecological, phylogenetic and biogeographic trait information into a single repository. The database houses species- and individual-level data from published field and experimental studies alongside contextual data that provide important framing for analyses. In this data descriptor, we release data for 56 traits for 1547 species, and present a collaborative platform on which other trait data are being actively federated. Our overall goal is for the Coral Trait Database to become an open-source, community-led data clearinghouse that accelerates coral reef research

    Regression I

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