Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The secret life of clouds...and other research

19.01.2007
Clouds can be a headache for meteorologists preparing weather forecasts and for scientists trying to predict how climates will change. Clouds can trap heat from the Earth or reflect heat radiation from the sun back into space, changing the way the climate behaves.

By learning more about the microscopic structure and physics of clouds, scientists are now better able to predict how the climate will respond. This research has been carried out as part of a major programme, funded by the Natural Environment Research Council (NERC), to determine what impact ice clouds have on the Earth’s climate system.

For the first time the scientists have shown that, within larger clouds, there are layers of super-cooled water cloud at temperatures as low as –30°C. These layers are not currently represented in weather and climate prediction models, but they are an important factor in determining whether the heat radiation is reflected back or allowed to pass through the cloud.

Research also shows that within the thin and wispy cirrus clouds that form from ice crystals high in the atmosphere, there are various concentrations of crystal numbers and shapes within different ‘regions’ of each cloud.

Programme leader, Professor Tom Choularton from the University of Manchester, explains why this is important. “The regions with small numbers of large crystals are relatively transparent and allow light through, whereas areas with an abundance of very small crystals scatter the incoming light. These differences have a huge effect on the amount of sunlight actually reaching the ground.”

A research team based at Imperial College, London, has developed a new instrument to measure the radiative properties of both ice clouds and clear air. They designed it for use on scientific aircraft and headed for Darwin in Northern Australia to observe the far infrared (very long wavelength) radiative properties of the skies around deep convective tropical storm regions.

Professor Choularton says,” This important work is still underway. We aim to link these measurements with the information we now know about the size, number and shape of ice crystals in clouds. The results will help us to test how well the effects of these clouds are represented in climate prediction and weather forecasting models.”

This research is just some of the exciting atmospheric science being showcased at a conference in London on Tuesday 23 January. ‘Our Changing Atmosphere’ highlights the work from four major research programmes to increase our understanding of the chemistry and physics of the atmosphere, and to quantify the effect of greenhouse gases on climate and air quality. NERC has invested £20 million in the four programmes.

Marion O'Sullivan | alfa
Further information:
http://www.nerc.ac.uk
http://www.nerc.ac.uk/research/areas/atmospheric/events/meeting.asp

More articles from Physics and Astronomy:

nachricht Astronomers release most complete ultraviolet-light survey of nearby galaxies
18.05.2018 | NASA/Goddard Space Flight Center

nachricht A quantum entanglement between two physically separated ultra-cold atomic clouds
17.05.2018 | University of the Basque Country

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

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

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>