Rekonstruktion von Umweltparametern durch Messungen an polaren und alpinen Eisbohrkernen

Description: Bei der Deposition von Schnee und bei der Transformation von Schnee zu Eis werden atmosphaerische Spurenstoffe (Gase, Aerosole etc.) eingeschlossen. In Gletschern und polaren Eisschichten werden diese ueber sehr lange Zeiten akkumuliert und bilden so eine Datenbank umwelt- und klimarelevanter Informationen der letzten 100.000 Jahre. Unsere Messungen konzentrieren sich auf Kohlendioxid, Methan, Wasserstoffperoxyd, verschiedene Radioisotope und weitere chemische Spurenstoffe. Ausserdem werden durch gleichzeitige Messungen von atmosphaerischen Konzentrationen bei frischen Niederschlaegen die Transferfunktionen Atmosphaere im Eis studiert (Jungfraujoch).

SupportProgram

Origins: /Bund/UBA/UFORDAT

Tags: Dendrochronologie ? Grönland ? Wasserstoffperoxid ? Schweiz ? Klimatologie ? Meeressediment ? Moos ? Spurengas ? Biotop ? Aerosol ? Eis ? Gewässersediment ? Gletscher ? Kohlendioxid ? Methan ? Probenaufbereitung ? Radionuklid ? Saurer Regen ? Sedimentanalyse ? Spurenstoff ? Binnengewässer ? Luft ? Bohrkern ? Evolution ? Geoökologie ? Kausalzusammenhang ? Mesoklima ? Messverfahren ? Schnee ? Umweltgeschichte ? Vergleichsanalyse ? Polargebiet ? Hochgebirge ? Bioindikator ? Klimaanalyse ? Datenbank ? Datenerhebung ? Anthropogener Einfluss ? Atmosphäre ? Informationsgewinnung ? Atmosphärenchemie ? Klima ? Treibhauseffekt ? Klimawandel ? Klimamonitoring ? Probenahme ? Klimaentwicklung ? Lebenszyklus ? Globale Aspekte ? Physikalische Größe ? Atlantischer Ozean ? Dioxyde de carbone (CO2) ? alpine-Eisbohrkerne ? polare-Eisbohrkerne ? Faktendatenbank ? Climat ? Glace ? Methodes analytiques ? Umweltparameter ? Zeitverlauf ?

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

• Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (Geldgeber*in)
• Umweltbundesamt (Bereitsteller*in)
• Universität Bern, Physikalisches Institut, Abteilung für Klima- und Umweltphysik (Betreiber*in)

Time ranges: 1993-01-01 - 1995-12-31

Alternatives

• Language: Englisch/English
  Title: Reconstruction of environmental parameters by measurements with polar and Alpine ice drilling cores
  Description: Leading Questions: - How synchronous were climatic changes in Switzerland and Greenland (west and east of the North Atlantic.)? - Can signals in natural archives of small climatic changes (like the little Ice age) be separated reliable from local noise? Abstract: The main goal of the proposed work is a comparison of ice core data from Greenland with climatic records from Switzerland and the Alpine region in order to assess parallelisms or differences between the climatic evolution of the Alpine region and the global trend. Only from the analysis of cores from polar ice sheets we know that there were already in the past dose connections between the atmospheric concentration of greenhouse gases and climate and that large and drastic climatic changes occurred very fast, in a fraction of a human life time. The comparison of the records from Greenland ice cores with records from climate archives from the Alpine region show that many of the observed climatic changes are synchronous in both regions. Complementary Information: The analysis of ice cores from the Greenland ice sheet give important Information about the climate and environment of the last few hundred thousand years. By comparing these records with data from records from natural archives like peat-bogs, tree rings and lake sediments from Switzerland we will try to disentangle local and global climatic changes. Two time windows are selected: - The last thousand years include important climatic events like the little ice age and the medieval climatic optimum. For this time window there are also direct historical records from the Alpine region available. - The transition from the last glacial to the Holocene period was the last climatic change of the same order of magnitude as the one we have to expect in the next century due to the anthropogenic caused increase of the Greenhouse effect. It is therefore a key time window for the understanding of mechanisms of global climatic changes. From Switzerland are records from peat-bogs and lake sediments available for this time window. https://ufordat.uba.de/UFORDAT/pages/PublicRedirect.aspx?TYP=PR&DSNR=32807

Status

Aktiv

Quality score

• Overall: 0.42
• Findability: 0.35

  • Title: 0.06
  • Description: 0.18
  • Identifier: false
  • Keywords: 0.85
  • Spatial: NoRegion (0.00)
  • Temporal: true
• Accessibility: 0.67

  • Landing page: Specific (1.00)
  • Direct access: false
  • Publicly accessible: true
• Interoperability: 0.00

  • Open file format: false
  • Media type: false
  • Machine-readable metadata: false
  • Machine-readable data: false
• Reusability: 0.67

  • License: ClearlySpecifiedAndFree (1.00)
  • Contact info: false
  • Publisher info: true

Accessed 1 times.