Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

European low-ozone event reveals worrying trend

08.02.2002


For several days last week, the protective ozone layer over Europe thinned considerably. Scientists monitoring ozone coverage using a rapid mapping technique based on data from the GOME (Global Ozone Monitoring Experiment) instrument aboard ESA`s ERS-2 satellite detected finger-like ozone thinning over Europe.



"From 28-30 January, we observed a pronounced `streamer event`," explains DLR`s Thilo Erbertseder, "where streamers of tropical air pushing up from the equatorial regions spread over southern Spain, France and Germany. Ozone levels in tropical air are much lower than those over more northern regions, and the end result was to decrease total ozone coverage to a low level of only 250 Dobson units."
The immediate effect of the low-ozone event was to increase exposure to harmful ultraviolet rays from the sun by 20-30% under clear skies. However, this type of event is alarming for another reason. "The occurrence of mini ozone holes and streamers is highest over Europe," adds Erbertseder, "and the frequency is increasing due to changes in stratospheric meteorology. The continual decline in ozone levels due to chemical depletion and the increase in in frequency of mini ozone holes over Europe is resulting in an increase in harmful biologically active UV radiation."

GOME has revealed that mini-hole and low-ozone events have been increasing in frequency lately. Very low ozone total column densities over Europe of below 200 Dobson Units were measured on 30 November 1999 and on 8 November 2001. The most recent event was accompanied by unusually warm weather in Central Europe.



The GOME data is provided shortly after acquisition by DLR/ESA and was further processed at the German Aerospace Centre`s Cluster of Applied Remote Sensing, using a technique called Kalman filtering, which is particularly useful for revealing smaller-scale structures in time and space from satellite measurements.

Wolfgang Lengert | alphagalileo
Further information:
http://www.esa.int

More articles from Earth Sciences:

nachricht Stagnation in the South Pacific Explains Natural CO2 Fluctuations
23.02.2018 | Carl von Ossietzky-Universität Oldenburg

nachricht First evidence of surprising ocean warming around Galápagos corals
22.02.2018 | University of Arizona

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>