FP4-ENV 2C, Wandel der polaren Wirbel (PVC)

Description: Wissenschaftliches Ziel von PVC ist die Untersuchung der Dynamik des stratosphaerischen Polarwirbels im Winter der Nordhemisphaere. Anhand von Beobachtungsdaten, zB den in der Arbeitsgruppe hergestellten Stratosphaerenanalysen, sollen die Klimatologie und die langfristige Variabilitaet des Polarwirbels untersucht werden. Moegliche, auf eine Klimaaenderung hindeutende Trends in der dynamischen Struktur des Polarwirbels, sollen analysiert werden. Ergaenzend werden Modellsimulationen mit dem Berliner Allgemeinen TSM (Tropo-Strato-Mesosphaeren-) Zirkulationsmodell durchgefuehrt, um die fuer die Struktur des Polarwirbels verantwortlichen Mechanismen herauszuarbeiten. Dabei sind insbesondere Transportprozesse durch den Polarwirbelrand und der damit verbundene Transport ozonarmer Luft in mittlere Breiten von Interesse.

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Origins: /Bund/UBA/UFORDAT

Tags: Berlin ? Klimatologie ? Winter ? Monitoringdaten ? Simulation ? Stratosphäre ? Zirkulationsmodell ? Klimawandel ? Stofftransport ? Hemisphäre [nördlich] ? Polar-Vortex-Change ? Polarwirbel ? Stratosphaerenanalyse ? TSM ? Tropo-Strato-Mesophaeren-Zirkulation ?

Region: Berlin

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

• Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung - Institut AWI - Forschungsstelle Potsdam (Mitwirkende)
• Finnish Meteorological Institute (Mitwirkende)
• Freie Universität Berlin, Institut für Meteorologie WE03 (Betreiber*in)
• Kommission der Europäischen Gemeinschaften Brüssel (Geldgeber*in)
• Norwegian Institute for Air Research Kjeller (Mitwirkende)
• Umweltbundesamt (Bereitsteller*in)
• University Cambridge, Department of Chemistry (Mitwirkende)
• University Oslo, Department of Chemistry (Mitwirkende)

Time ranges: 1997-12-01 - 1999-11-30

Alternatives

• Language: Englisch/English
  Title: Polar Vortex Change (PVC)
  Description: General Information: Polar Vortex Change (PVC) is a proposal by six European research groups to address the climate variability and changes of the Arctic polar vortex. Polar vortex is characterised by ozone loss and temperature extremes, but also by large interannual variability. Polar vortex is an important component of hemispheric climate and changes in it can significantly affect high and mid-latitudes. They also tell about the advancement of climate change. The potential long-term changes in the dynamics and chemistry of the Arctic polar vortex have not been studied in a concentrated manner. Instead, ozone has been in focus. Coordinated exploration of the best data sets offers the possibility for answers on the advancement of climate change and its implications on high and middle latitudes of the northem hemisphere. PVC has been designed for this purpose. PVC will quantify changes in the Arctic polar vortex dynamics and chemistry due to long-term changes in temperature, ozone and other stratospheric constituents. In PVC, a combination of extensive data analysis and modelling is applied on the best long-term data on the Arctic polar vortex to analyse for natural variability, long-term changes and trends: - European Arctic ozone soundings from late 1980's to present - ECMWF reanalysis data for 1979-1994 and operational analyses since - FU Berlin and NCEP analyses - TOMS v7 and ground-based column ozone data - UARS, SSU, SAM satellite-data. There are four Work Packages (2 data analysis and 2 modelling ones) in PVC, in which advanced tools are used: - Use of transformed coordinate systems, with respect to Potential Vorticity, low temperatures, polar vortex edge, time, potential temperature, inlong-term ozone change analysis (WP 1) - Analysis of Lagrangian in-situ data in year-to-year chemical ozone lossanalysis (WP 1) - State of the art GCM modelling of vortex dynamics and outflow with modemadvection schemes (WP 2) - Contour advection modelling of vortex outflow (WP 2) - State of the art 2-D and 3-D decadal chemical modelling of naturalvariability, trace gases and heterogeneous processes, using updatedemission scenarios and observed trends (WP 3) - State of the art radiative transfer modelling using observed and modelledtrace gas, temperature and aerosol changes (WP 4) - In additioni intensive data analysis is done on polar vortex natural andchanging life cycle and temperature extremes (WP 2), using high-qualityhomogenised meteorological data. The main study period of PVC is late 1970's to present in the case of ozone column trends, late 1970's to present in the case of vortex dynamics and chemistry changes, the same for the radiative forcing changes and late 1980's to present in case of ozone profile changes. The earlier decades (1950's to 1970's) are studied to better understand the natural variability of the polar vortex... Prime Contractor: Finnish Meteorological Institute, Meteorological Observatory Sodankylae; Sodankylae/Finland. https://ufordat.uba.de/UFORDAT/pages/PublicRedirect.aspx?TYP=PR&DSNR=58117

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