Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The Cloud Detectives

09.06.2005


Researchers at the University of Leicester have developed a cloud detection system which will lead to them gaining a better understanding of greenhouse gases.



The team in the Earth Observation Science Group have identified a method that eliminates inaccuracies in monitoring how dynamics, radiation and chemical processes interact and control greenhouse gas distributions, and how industrial and human activities affect them.

The UK has invested £300 million in instruments onboard the European Space Agency’s largest satellite, ENVISAT, which is dedicated to observing land, ocean, ice and the atmosphere.


The Leicester Earth Observation Science group is using an atmospheric instrument on ENVISAT called MIPAS, to study the vertical ‘profiles’ of greenhouse gases in the atmosphere.

As ENVISAT orbits the Earth every 100 minutes, the MIPAS collects atmospheric emission spectra from which the unique “signature” of various gases can be retrieved.

However, as the tropical Upper Troposphere has a high cloud occurrence frequency (between 40 and 60%) it can result in inaccurate concentration retrievals due to cloud contamination of measured spectra.

The cloud detection scheme developed at the University of Leicester identifies cloud-free MIPAS data, so that ‘decontaminated’ water vapour and ozone information can be used to study key regions of the tropical atmosphere.

The Leicester team has already found:

Ozone enhancement over Equatorial Africa, which may be caused by biomass burning or transport. This moves through the Upper Troposphere (UT) and Lower Stratosphere (LS) (collectively called the UTLS).

The strong presence of high altitude sub-visible cloud (which cannot be seen with the naked eye) over South America, Africa, Indonesia and Darwin and the Pacific Ocean.

Large variability in UTLS water vapour, particularly an intensely dry atmosphere over Indonesia compared to the rest of the tropical UTLS. The mechanisms of how this feature occurs are still unknown.

This Leicester research will make a contribution to a major international aircraft field campaign called SCOUT- O3 that will take place in Darwin, Australia, in November 2005.

The Earth Observation Science group at the University of Leicester will be part of the satellite support team, aid pre-flight analysis and be responsible for providing greenhouse gas and cloud information to complement aircraft and balloon measurements of the tropical UTLS.

Postgraduate research student Harjinder Sembhi explained the significance of the research:

“The tropical lower atmosphere from 10 to 21 km altitude is a significant and fascinating region of the Earth’s atmosphere, which is unfortunately very poorly monitored by ground and air-based atmospheric instruments.

“Ozone above 20 km acts as a protective shield from harmful ultraviolet radiation. However in the troposphere it is a greenhouse gas and has the ability to affect the concentrations of other important greenhouse gases in this region. It is therefore essential to study the distribution of these gases in the tropical UTLS to help understand their impact on the global atmosphere and climate.”

Ather Mirza | alfa
Further information:
http://www.le.ac.uk

More articles from Earth Sciences:

nachricht New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland
19.01.2017 | University of Gothenburg

nachricht Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland

19.01.2017 | Earth Sciences

Not of Divided Mind

19.01.2017 | Life Sciences

Molecule flash mob

19.01.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>