Objective
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. Parts of these data have been analysed earlier, but only for shorter time spans in case studies or for specific winters. Successive shorter timespan studies have been made with evolving methods and data, as well as with data from evolving instrumentation and processing. PVC, on the other hand, will perform a thorough, coordinated analysis of the available, homogenised long-temm data sets.
PVC contributes to Area 1.1 Topics 1.1.3 and 1.1.1 (Climate variability, simulation of climate and prediction of climate change; Basic processes in the climate system) and Area 1.2 Topic 1.2.1.1 (Stratospheric chemistry and depletion of the ozone layer) of the Workprogramme. PVC supports the THESEO activities. PVC is a two year proposal.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences computer and information sciences data science
- natural sciences earth and related environmental sciences environmental sciences ozone depletion
- natural sciences earth and related environmental sciences atmospheric sciences climatology climatic changes
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
99600 Sodankylae
Finland
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