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    <title>OPUS 4 Latest Documents RSS Feed</title>
    <description>Latest documents</description>
    <link>http://opus4.kobv.de/opus4-ubbayreuth/index/index/</link>
    <pubDate>Fri, 05 Jul 2013 07:48:21 +0200</pubDate>
    <lastBuildDate>Fri, 05 Jul 2013 07:48:21 +0200</lastBuildDate>
    <item>
      <title>Tibet Plateau Atmosphere-Ecology-Glaciology Cluster  Joint Kobresia Ecosystem Experiment: Documentation of the second Intensive Observation Period, Summer 2012 in KEMA, Tibet</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/1162</link>
      <description>Experiment documentation of the second joined Kobresia ecosystem experiment conducted by the Atmosphere-Ecology-Glaciology Cluster within DFG SPP 1372 (Tibetan Plateau)in Kema, Tibet, China. The report provides background information about the field side, conducted measurements and participants.</description>
      <author>Tobias Biermann</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/1162</guid>
      <pubDate>Tue, 07 May 2013 07:48:21 +0200</pubDate>
    </item>
    <item>
      <title>Documentation of the Atmospheric Boundary Layer Experiment, Nam Tso, Tibet, 08th of July – 08th of August 2012</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/1139</link>
      <description>no abstract</description>
      <author>Tobias Gerken; Kathrin Fuchs; Wolfgang Babel</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/1139</guid>
      <pubDate>Tue, 16 Apr 2013 13:21:46 +0200</pubDate>
    </item>
    <item>
      <title>Jahresbericht 2010-11 zum Förderprojekt  01879 Untersuchung der Veränderung der Konzentration von Luftbeimengungen und Treibhausgasen im hohen Fichtelgebirge 2007 – 2014</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/1046</link>
      <description>no abstract</description>
      <author>Thomas Foken; Lisa Dirks</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/1046</guid>
      <pubDate>Mon, 07 Jan 2013 10:08:37 +0100</pubDate>
    </item>
    <item>
      <title>Whole-air relaxed eddy accumulation for the measurement of isotope and trace-gas fluxes </title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/775</link>
      <description>Measuring the isotopic composition of trace gas fluxes can provide additional information on ecosystem gas exchange, when ecosystem processes, like assimilation, discriminate against heavier isotopes. In the case of CO2 exchange, different mass-balances for bulk CO2 and its 13CO2 or CO18O isotopes can be used to separate respiration from photosynthetic assimilation. Up to now, detectors for direct isotope measurements in the field lack the precision needed for fast eddy covariance (EC) flux measurements. The collection of updraft and downdraft whole-air samples using the relaxed eddy accumulation technique (REA) allows simultaneously determining trace gas concentrations and isotope ratios by high precision laboratory analysis. At the same time whole-air REA relaxes several of the technical problems related to REA sampling on traps. In tests using air from a tank the complete whole-air REA sampling system and its foil balloon bag reservoirs showed no signs of contamination after cleaning. The standard deviations of δ13C and δ18O isotope ratios were only slightly higher than the precision specified for the laboratory analysis procedure. First experiment results showed that isotopic differences (up-drafts−downdrafts) were large enough to yield signal to noise ratios greater than five when applying hyperbolic deadbands during REA sampling (HREA). The performance of the instrument and the HREA sampling method are investigated by simulation of the sampling process for bulk CO2, which serves as proxy scalar. Measurements by whole-air HREA in combination with high precision isotope analysis can quantify the isofluxes of 13CO2 and CO18O. Furthermore, additional information is collected on the scalar correlation of bulk CO2 and its stable isotopes, which represents the relatively short timescale of updrafts and downdrafts in the turbulent exchange above an ecosystem. This information is essential to check the scalar similarity assumptions made in the HREA and EC/flask method for the quan-tification of isofluxes.</description>
      <author>Johannes Ruppert; Michael Riederer; Willi A. Brand; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/775</guid>
      <pubDate>Thu, 21 Jun 2012 08:59:39 +0200</pubDate>
    </item>
    <item>
      <title>The Arctic Turbulence Experiment 2009 - additional laser Scintillometer measurement campaign 2009 at the Bayelva catchment on Svalbard: Technical documentation and visualization of the near surface measurements during the ARCTEX-2009 campaign, August, 10th to August, 20th 2009</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/756</link>
      <description>Accurate quantification of turbulent fluxes between the surface and the atmospheric boundary layer in polar environments, characterized by frequent change of weather and exchange conditions (stable to very stable or intermittent; rapid, short term neutral to unstable stratified conditions) is a fundamental problem in soil-snow-ice-vegetation-atmosphere interaction processes. The observed rapid climate warming in the Arctic requires improvements in the permafrost and carbon cycle monitoring. To address these problems, it is essential to improve the databases with high-quality in-situ measurements of turbulent fluxes above tundra landscape surfaces applying the Eddy-Covariance method and the laser scintillometry. Results from the Arctic Turbulence Experiment 2006 on Svalbard helped to better understand physical exchange processes of energy and matter transport and to improve instrumentation standards as well as quality assessment techniques (Lüers and Bareiss 2010, 2011; http://www.arctex.uni-bayreuth.de). Therefore, the primary goal of this additional laser scintillometer measurement campaign is to estimate the flux contributions covering typical tundra surfaces across the Bayelva catchment during a summer season south-west of the Ny-Ålesund village, Kongsfjord, Svalbard. This effort makes it possible to define the spatial context of the fluxes, and to include land use features of the surrounding terrain in the quality assessment of all observations in the Bayelva catchment over the last 10 years performed by the Alfred Wegener Institute for Polar and Marine Research (AWI).</description>
      <author>Johannes Lüers; Jörg Bareiss; Martin Wagner</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/756</guid>
      <pubDate>Fri, 23 Mar 2012 12:38:53 +0100</pubDate>
    </item>
    <item>
      <title>Documentation and Instruction Manual for the Horizontal Mobile Measuring System (HMMS)</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/740</link>
      <description/>
      <author>Jörg Hübner; Johannes Olesch; Hubert Falke; Franz X. Meixner; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/740</guid>
      <pubDate>Wed, 11 Jan 2012 09:09:35 +0100</pubDate>
    </item>
    <item>
      <title>ExchanGE processes in mountainous Regions (EGER)- Documentation of the Intensive Observation Period (IOP3) June, 13th to July, 26th 2011</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/726</link>
      <description/>
      <author>Andrei Serafimovich; Fabian Eder; Jörg Hübner; Eva Falge; Linda Voß; Matthias Sörgel; Andreas Held; Qianqian Liu; Rafael Eigenmann; Kilian Huber; Henrique F. Duarte; Peter Werle; Eckhard Gast; Stanislaw Cieslik; Liu Heping; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/726</guid>
      <pubDate>Tue, 15 Nov 2011 10:19:53 +0100</pubDate>
    </item>
    <item>
      <title>Documentation and Instruction Manual of the Eddy-Covariance Software Package TK3</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/681</link>
      <description>no abstract</description>
      <author>Matthias Mauder; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/681</guid>
      <pubDate>Tue, 31 May 2011 09:36:12 +0200</pubDate>
    </item>
    <item>
      <title>Comparison ot the sonic anemometer Young Model 81000 during VOITEX-99</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/660</link>
      <description>no abstract</description>
      <author>Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/660</guid>
      <pubDate>Fri, 01 Apr 2011 12:23:51 +0200</pubDate>
    </item>
    <item>
      <title>Proceedings of the International Conference of "Atmospheric Transport and chemistry in Forest Ecosystems" Castle of Thurnau, Germany Oct 5 to Oct 8, 2009</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/659</link>
      <description>no abstract</description>
      <author>Johannes Lüers; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/659</guid>
      <pubDate>Fri, 01 Apr 2011 12:02:14 +0200</pubDate>
    </item>
    <item>
      <title>ATEM Software for Athmospheric Turbulence Exchange Measurements using Eddy Covariance and Relaxed Eddy Accumulation Systems and Bayreuth whole-air REA system setup</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/657</link>
      <description>no abstract</description>
      <author>Johannes Ruppert</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/657</guid>
      <pubDate>Tue, 29 Mar 2011 11:06:17 +0200</pubDate>
    </item>
    <item>
      <title>Complex TERRain and ECOlogical Heterogeneity (TERRECO);WP 1-02: Spatial assessment of atmosphere-ecosystem exchanges via micrometeorological measurements, footprint modeling and mesoscale simulations ; Documentation of the Observation Period May 12th to Nov. 8th, 2010, Haean, South Korea</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/653</link>
      <description>no abstract</description>
      <author>Peng Zhao; Johannes Lüers; Johannes Olesch; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/653</guid>
      <pubDate>Wed, 23 Mar 2011 10:40:45 +0100</pubDate>
    </item>
    <item>
      <title>Characterisation of a complex measuring site for flux measurements</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/646</link>
      <description>no abstract</description>
      <author>Matthias Göckede; Corinna Rebmann; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/646</guid>
      <pubDate>Wed, 16 Mar 2011 12:06:35 +0100</pubDate>
    </item>
    <item>
      <title>Documentation of the WALDATEM-2003 Experiment April, 28th to August, 03rd 2003</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/641</link>
      <description>no abstract</description>
      <author>Christoph Thomas; Johannes Ruppert; Johannes Lüers; Joel Schröter; Jens-Christopher Mayer; Theresa Bertolini</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/641</guid>
      <pubDate>Wed, 16 Mar 2011 09:14:23 +0100</pubDate>
    </item>
    <item>
      <title>Documentation and Instruction Manual of the Eddy Covariance Software Package TK2</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/639</link>
      <description>no abstract</description>
      <author>Matthias Mauder; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/639</guid>
      <pubDate>Tue, 15 Mar 2011 13:06:51 +0100</pubDate>
    </item>
    <item>
      <title>The OP-2 open path infrared gas analyser for CO2 and H2O</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/638</link>
      <description>no abstract</description>
      <author>Gesa M. Herold; Christoph Thomas; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/638</guid>
      <pubDate>Tue, 15 Mar 2011 12:55:34 +0100</pubDate>
    </item>
    <item>
      <title>Footprint synthesis for the FLUXNET site Waldstein/Weidenbrunnen (DE-Bay) during the EGER experiment</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/637</link>
      <description>no abstract</description>
      <author>Lukas Siebicke</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/637</guid>
      <pubDate>Tue, 15 Mar 2011 12:27:07 +0100</pubDate>
    </item>
    <item>
      <title>ExchanGE processes in mountainous Regions (EGER) Documentation of the Intensive Observation Period (IOP2) June, 1st to July, 15th 2008</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/636</link>
      <description>no abstract</description>
      <author>Andrei Serafimovich; Lukas Siebicke; Katharina Staudt; Johannes Lüers; Martina Hunner; Tobias Gerken; Stephanie Schier; Tobias Biermann; Friederike Rütz; Jannis von Buttlar</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/636</guid>
      <pubDate>Mon, 14 Mar 2011 13:22:55 +0100</pubDate>
    </item>
    <item>
      <title>ExchanGE processes in mountainous Regions (EGER)-  Documentation of the Intensive Observation Period (IOP1) September, 6th to October, 7th 2007</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/635</link>
      <description>no abstract</description>
      <author>Andrei Serafimovich; Lukas Siebicke; Katharina Staudt; Johannes Lüers; Tobias Biermann; Stephanie Schier; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/635</guid>
      <pubDate>Mon, 14 Mar 2011 12:52:29 +0100</pubDate>
    </item>
    <item>
      <title>Documentation of reference data for the experimental areas of the Bayreuth Centre for Ecology and Environmental Research (BayCEER) at the Waldstein site</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/634</link>
      <description>no abstract</description>
      <author>Katharina Staudt; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/634</guid>
      <pubDate>Mon, 14 Mar 2011 12:25:43 +0100</pubDate>
    </item>
    <item>
      <title>COPS experiment - Convective and orographically induced precipitation study, 01 June 2007 – 31 August 2007 </title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/633</link>
      <description>no abstract</description>
      <author>Stefan Metzger; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/633</guid>
      <pubDate>Mon, 14 Mar 2011 12:09:17 +0100</pubDate>
    </item>
    <item>
      <title>The Arctic Turbulence Experiment 2006, Direct measurements of turbulent fluxes in the near surface environment at high latitudes applying the eddy-covariance method, Part 3</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/632</link>
      <description>no abstract</description>
      <author>Johannes Lüers; Jörg Bareiss</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/632</guid>
      <pubDate>Mon, 14 Mar 2011 10:54:13 +0100</pubDate>
    </item>
    <item>
      <title>The Arctic Turbulence Experiment 2006, Direct measurements of turbulent fluxes in the near surface environment at high latitudes applying the eddy-covariance method, Part 2</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/630</link>
      <description>no abstract</description>
      <author>Johannes Lüers; Jörg Bareiss</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/630</guid>
      <pubDate>Mon, 14 Mar 2011 10:34:50 +0100</pubDate>
    </item>
    <item>
      <title>The Arctic Turbulence Experiment 2006, Direct measurements of turbulent fluxes in the near surface environment at high latitudes applying the eddy-covariance method, Part 1</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/629</link>
      <description/>
      <author>Johannes Lüers; Jörg Bareiss</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/629</guid>
      <pubDate>Mon, 14 Mar 2011 10:19:21 +0100</pubDate>
    </item>
    <item>
      <title>Mesoscale Circulations and Energy and GaS Exchange Over the Tibetan Plateau Documentation of the Micrometeorological Experiment, Nam Tso, Tibet</title>
      <link>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/626</link>
      <description/>
      <author>Tobias Biermann; Wolfgang Babel; Johannes Olesch; Thomas Foken</author>
      <category>report</category>
      <guid>http://opus4.kobv.de/opus4-ubbayreuth/frontdoor/index/index/docId/626</guid>
      <pubDate>Fri, 11 Mar 2011 12:56:03 +0100</pubDate>
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