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  • 2020-2024  (4)
  • 2015-2019  (117)
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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Biogeochemistry--Baltic Sea. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (119 pages)
    Edition: 1st ed.
    ISBN: 9783319616995
    Series Statement: Springer Oceanography Series
    Language: English
    Note: Intro -- Preface -- Contents -- About the Authors -- Abbreviations -- 1 Introduction -- 1.1 History of CO2 System Research in the Baltic Sea -- 1.2 Objectives of This Book -- References -- 2 The Marine CO2 System and Its Peculiarities in the Baltic Sea -- 2.1 Atmospheric CO2 Over the Baltic Sea -- 2.2 Aqueous Equilibrium Chemistry of CO2 -- 2.3 Measurable Variables of the Marine CO2 System -- 2.3.1 CO2 Equilibrium Fugacity and Partial Pressure -- 2.3.2 Total CO2 and pH -- 2.3.3 Alkalinity -- 2.3.4 Physico-Chemical Properties of the Master Variables -- 2.4 CO2 Air-Sea Gas Exchange -- References -- 3 The Main Hydrographic Characteristics of the Baltic Sea -- 3.1 Water Budget and Estuarine Circulation -- 3.2 Seasonality of the Stratification -- 3.3 Stagnation and Inflow Events -- References -- 4 The Database -- 4.1 Studies of the Surface Water CO2 System -- 4.2 Investigations of the Deep Water CO2 Accumulation -- References -- 5 Surface Water Biogeochemistry as Derived from pCO2 Observations -- 5.1 Seasonal and Regional Patterns of pCO2 and CT -- 5.1.1 Characteristics of the pCO2 Time Series -- 5.1.2 Long-Term Changes in pCO2 -- 5.1.3 The Seasonal Fine Structure of the pCO2 -- 5.1.4 From pCO2 Measurements to Total CO2 Data -- 5.2 A Walk Through the Seasons -- 5.2.1 Timing of the Spring Bloom and the Role of Solar Radiation -- 5.2.2 Quantification of Spring Bloom Productivity -- 5.2.3 Nitrogen Supply for the Spring Bloom -- 5.2.4 Net Community Production and Nutrient Consumption -- 5.2.5 The "Blue Water" Period -- 5.2.6 Control of Mid-Summer Net Community Production and N-fixation -- 5.2.7 Estimation of Depth-Integrated N-fixation -- 5.2.8 Autumn Mixing and Upwelling: The Occurrence of a Last Bloom Event -- 5.2.9 Annual CT* Cycling Presented as CT* Versus SST Diagrams -- References. , 6 Organic Matter Mineralization as Reflected in Deep-Water CT Accumulation -- 6.1 Total CO2 Dynamics During Periods of Stagnation and Water Renewal -- 6.2 Organic Matter Mineralization Rates Derived from CT Mass-Balance Calculations -- 6.3 Release and Transformations of Nutrients During OM Mineralization -- References -- 7 Progress Made by Investigations of the CO2 System and Open Questions -- Index.
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  • 2
    Keywords: Earth sciences ; Earth Sciences ; Analytical chemistry ; Geochemistry ; Oceanography ; Geobiology ; Geochemie ; Meereskunde ; Ostsee
    Description / Table of Contents: This book provides a comprehensive review of the biogeochemistry in the Baltic Sea. It is based on the fact that biogeochemical processes that are relevant for the ecological state of the Baltic Sea (and other sea areas), are all in some way related to the production and mineralization of organic matter (biomass) and thus are associated with the consumption or release of CO2. The significant progress with regard to our chemical analytical capabilities concerning the marine CO2 system has facilitated new approaches to study the Baltic Sea biogeochemistry, in particular with regard to a quantitative process understanding. To demonstrate this, the authors present the fundamentals of the marine CO2 system in a theoretically sound, but still intelligible way. This is followed by a comprehensive presentation of our current knowledge about the CO2 system in the Baltic Sea and the implications for our understanding of biogeochemical processes such as production/mineralization of organic matter and the stoichiometry involved, nitrogen fixation, denitrification, and phosphate transformations at varying redox conditions. Finally, the CO2 gas exchange balance and related problems such as acidification are addressed
    Type of Medium: Online Resource
    Pages: Online-Ressource (XII, 110 p. 54 illus, online resource)
    ISBN: 9783319616995
    Series Statement: Springer Oceanography
    Language: English
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  • 3
    Keywords: Electronic books
    Description / Table of Contents: Intro -- INHALTSVERZEICHNIS -- DANK -- MITGLIEDER DER INTERDISZIPLINÄREN ARBEITSGRUPPE »HISTORISCHE GÄRTEN IM KLIMAWANDEL« -- EINFÜHRUNG -- INTRODUCTION -- KUNSTGESCHICHTE UND GARTENDENKMALPFLEGE -- EINLEITUNG -- DER KULTURELLE WERT HISTORISCHER GÄRTEN ALS GESCHICHTSDOKUMENT UND KUNSTWERK -- HISTORISCHE GÄRTEN ALS KULTURAUFGABE -- HISTORISCHE GÄRTEN ALS ORTE NATURWISSENSCHAFTLICHEN UND TECHNISCHEN WISSENS -- ON THE SOCIAL HISTORY OF STEAM-POWERED GARDENS IN BERLIN AND POTSDAM -- »DER EINFLUSS DES HIMMELS« -- »KLIMA, BODEN, STANDORT UND TAUSEND ANDERE DINGE MÜSSEN IN BETRACHT GEZOGEN WERDEN« -- GELÄNDEMODELLIERUNG ALS KÜNSTLERISCHER AKT UND DIE REPRÄSENTATION IM BILD -- GÄRTNERN MIT DEM STROM -- ANSÄTZE VON NACHHALTIGKEIT IM UMGANG MIT HISTORISCHEN GÄRTEN -- NATURRÄUMLICHE AUSSTATTUNG -- EINLEITUNG -- DER DERZEITIGE UND DER ZUKÜNFTIGE KLIMAWANDEL IN DEN HISTORISCHEN PARKS BERLIN-BRANDENBURGS -- WIE WIRKT SICH DER TIERGARTEN BERLIN AUF DAS WOHLBEFINDEN DER MENSCHEN AUS? -- DIE STANDÖRTLICHE VARIABILITÄT VON BÖDEN UND WASSERHAUSHALT IN HISTORISCHEN GÄRTEN UND KULTURLANDSCHAFTEN UND IHRE BEDEUTUNG FÜR DIE ANPASSUNG AN DEN KLIMAWANDEL -- HERKUNFT UND DIVERSITÄT DER GEHÖLZE IN LANDSCHAFTLICHEN GÄRTEN AM BEISPIEL DER PARKS DER STIFTUNG PREUSSISCHE SCHLÖSSER UND GÄRTEN BERLIN-BRANDENBURG (SPSG) -- BEREICHERUNG ODER BEDROHUNG? -- WILDTIERE IN HISTORISCHEN GÄRTEN -- SATELLITENGESTÜTZTES UMWELTMONITORING -- TECHNISCHE VERFAHREN ZUR SCHADENSANALYSE AN HISTORISCHEN BAUTEN UND DENKMÄLERN -- GESELLSCHAFTLICHE RAHMENBEDINGUNGEN UND SOZIALWISSENSCHAFTLICHE PERSPEKTIVEN -- EINLEITUNG -- DIE GESELLSCHAFTLICHE EINBETTUNG HISTORISCHER GÄRTEN UND IHRE KLIMAWANDEL-RESILIENZ -- DIE GESELLSCHAFTLICHE INWERTSETZUNG VON KULTURERBE -- NARRATIVE LANDSCHAFTEN ALS LERNRAUM IM WANDEL -- PARKORDNUNGEN HISTORISCHER GÄRTEN AUS SPRACHWISSENSCHAFTLICHER SICHT.
    Type of Medium: Online Resource
    Pages: 1 online resource (444 pages)
    ISBN: 9783110607772
    DDC: 712.3
    Language: German
    Note: Description based on publisher supplied metadata and other sources
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  • 4
    Keywords: Forschungsbericht ; Lausitz ; Innovationsförderung
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (15 Seiten, 563,87 KB)
    Language: German
    Note: Förderkennzeichen BMBF 03WIR3001 , Autoren dem Berichtsblatt entnommen , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 5
    Publication Date: 2023-09-27
    Description: The Surface Ocean CO2 Atlas (SOCAT) is a synthesis of quality-controlled fCO2 (fugacity of carbon dioxide) values for the global surface oceans and coastal seas with regular updates. Version 3 of SOCAT has 14.7 million fCO2 values from 3646 data sets covering the years 1957 to 2014. This latest version has an additional 4.6 million fCO2 values relative to version 2 and extends the record from 2011 to 2014. Version 3 also significantly increases the data availability for 2005 to 2013. SOCAT has an average of approximately 1.2 million surface water fCO2 values per year for the years 2006 to 2012. Quality and documentation of the data has improved. A new feature is the data set quality control (QC) flag of E for data from alternative sensors and platforms. The accuracy of surface water fCO2 has been defined for all data set QC flags. Automated range checking has been carried out for all data sets during their upload into SOCAT. The upgrade of the interactive Data Set Viewer (previously known as the Cruise Data Viewer) allows better interrogation of the SOCAT data collection and rapid creation of high-quality figures for scientific presentations. Automated data upload has been launched for version 4 and will enable more frequent SOCAT releases in the future. High-profile scientific applications of SOCAT include quantification of the ocean sink for atmospheric carbon dioxide and its long-term variation, detection of ocean acidification, as well as evaluation of coupled-climate and ocean-only biogeochemical models. Users of SOCAT data products are urged to acknowledge the contribution of data providers, as stated in the SOCAT Fair Data Use Statement. This ESSD (Earth System Science Data) "living data" publication documents the methods and data sets used for the assembly of this new version of the SOCAT data collection and compares these with those used for earlier versions of the data collection (Pfeil et al., 2013; Sabine et al., 2013; Bakker et al., 2014). Individual data set files, included in the synthesis product, can be downloaded here: doi:10.1594/PANGAEA.849770. The gridded products are available here: doi:10.3334/CDIAC/OTG.SOCAT_V3_GRID.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
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  • 6
    Publication Date: 2022-01-13
    Description: Borates are the third most important component of total alkalinity (AT) in the oxic waters. Their concentrations are a function of the dissociation constant of boric acid and total boron (TB) concentration. The latter is approximated from salinity (S) as boron behave conservatively in the seawater. The linear dependencies between TB and S developed for the open ocean contain no intercept suggesting that river water contains no boron. Based on the historical data and our own measurements we identified a TB vs. S relationship specific for the Baltic Sea: TB [μmol kg−1] = 10.838 ∗ S + 13.821. In the series of the sensitivity tests we analysed what effect can have this anomaly on the determination of borate alkalinity (AB) and on the calculations within the CO2 system performed with AT as an input variable. Due to the high pKa for boric acid the influence of TB anomaly on AB exists only for pH 〉 8. The highest deviation in AB appears at low salinities. When salinity increases the effect becomes smaller and at salinities 〉 14, due to lower slope in TB vs. S dependency in the Baltic than in the open ocean, the effect on AB turns to negative and decreases further with the S increase. These uncertainties in AB influence calculations of pCO2 (CO2 partial pressure) and pH, when CT (total CO2 concentration) and AT are used as input parameters (the combination used in biogeochemical models). For pCO2 the discrepancies in calculations are not very much dependent on the AT. The highest are observed for low salinities and pH of 8.2–8.4, however they do not exceed 10 μatm. This relatively low influence of TB anomaly on pCO2 calculations is a result of the high distance on the pH scale between high pCO2 conditions (low pH) and the highest AB anomaly (high pH). In case of pH calculations the highest influence of TB anomaly is observed for the low AT and low S waters. For three different AT considered in our study the highest pH errors (up to 0.05 pH unit) were observed for AT = 500 μmol kg−1, while the lowest (up to 0.01 pH unit) were observed for highly buffered waters (AT = 3000 μmol kg−1). Irrespective of the AT the highest errors were found for low CT simulating low pCO2 (and thus high pH) conditions. This is due to the high pKa for boric acid that shifts the effects of the TB anomaly to high pH values. Although the observed discrepancies in pH and pCO2 calculations due to TB anomaly manifest themselves only at the specific environmental conditions the use of experimentally obtained TB vs. S dependency will increase the accuracy of the CO2 system calculations for the Baltic Sea and likely for other brackish systems.
    Type: Article , PeerReviewed
    Format: text
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  • 7
    Publication Date: 2023-03-14
    Keywords: Alkalinity, total; Carbon, total; Carbon dioxide, partial pressure; CT; DATE/TIME; DEPTH, water; Discretely sampled from water stream of Underway-Equilibrator-System; LATITUDE; LONGITUDE; OC16/11; OC16/11-track; Oceania; Oxygen; Oxygen saturation; pH; Salinity; Temperature, water; Underway cruise track measurements; Underway-Equilibrator-System
    Type: Dataset
    Format: text/tab-separated-values, 286 data points
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  • 8
    Publication Date: 2023-01-13
    Keywords: Carbon dioxide, partial pressure; CT; DATE/TIME; DEPTH, water; LATITUDE; LONGITUDE; OC16/11; OC16/11-track; Oceania; Salinity; Temperature, water; Underway cruise track measurements; Underway-Equilibrator-System
    Type: Dataset
    Format: text/tab-separated-values, 10134 data points
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  • 9
    Publication Date: 2023-09-08
    Description: During Polarstern cruise ANT-XXV/5 in April/May 2009, the marine atmosphere was sampled via PTFE (Polytetrafluorethylen) tubing extending from the front of the upper deck to labs on the main deck of r/v Polarstern and then analyzed for elemental mercury in air (Hg0-air) using the same Tekran 2537A as for Hg0-water measurements. The time interval of Hg0-air measurements was 5-min with gaps of about 20 min each hour because of intermittent Hg0-water measurements. The data were checked for potential contamination during tailwind situations (relative wind speed and direction) and doubtful values were removed. The detection limit was 0.1 ng L-1 (on ANT-XXV/5: 5 times the Hg0-air values were below the detection limit).
    Keywords: ALTITUDE; ANT-XXV/5; Atlantic Ocean; atmospheric boundary layer; Atmospheric measurements; BARO; Barometer; Calculated; DATE/TIME; Elemental mercury; Humidity, relative; HYGRO; Hygrometer; LATITUDE; LONGITUDE; Mercury; Mercury vapour analyzer, Tekran, 2537A; Polarstern; Pressure, atmospheric; PS73; PS73/5_0_Underway-2; PS73/5_0_Underway-4; Ship Weather Station; SWEAS; Temperature, air; Thermometer; UAS; Underway air sampling
    Type: Dataset
    Format: text/tab-separated-values, 37480 data points
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  • 10
    Publication Date: 2023-09-08
    Description: During Polarstern cruise ANT-XXV/1 in November 2008 , the marine atmosphere was sampled via PTFE (Polytetrafluorethylen) tubing extending from the front of the upper deck to labs on the main deck of r/v Polarstern and then analyzed for elemental mercury in air (Hg0-air) using the same Tekran 2537A as for Hg0-water measurements. The time interval of Hg0-air measurements was 5-min with gaps of about 20 min each hour because of intermittent Hg0-water measurements. The data were checked for potential contamination during tailwind situations (relative wind speed and direction) and doubtful values were removed. The detection limit was 0.1 ng L-1.
    Keywords: ALTITUDE; ANT-XXV/1; Atlantic Ocean; atmospheric boundary layer; Atmospheric measurements; BARO; Barometer; Calculated; DATE/TIME; Elemental mercury; Humidity, relative; HYGRO; Hygrometer; LATITUDE; LONGITUDE; Mercury; Mercury vapour analyzer, Tekran, 2537A; Polarstern; Pressure, atmospheric; PS73; PS73/1_0_Underway-2; PS73/1_0_Underway-4; Ship Weather Station; SWEAS; Temperature, air; Thermometer; UAS; Underway air sampling
    Type: Dataset
    Format: text/tab-separated-values, 25180 data points
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