Navigation Links
New research results change the understanding of atmospheric aerosol properties and climate effects
Date:10/14/2010

Atmospheric fine particles affect the Earth's radiation balance by interacting with solar radiation and by participating in cloud formation. Biogenic volatile organic compounds are key players in new particle formation processes. Hence, terrestrial vegetation has an important role as the newly formed particles cool our climate. The chemical composition of such secondary organic aerosol (SOA) particles formed from volatile compounds emitted by vegetation is very complicated and only limited information on the phase state of SOA particles has been available. Thus the scientific community has tried to understand the chemical composition and physical characteristics of SOA particles in order to better understand their climatic implications and also to enable more accurate predictions using global climate models.

Until now, biogenic SOA particles have been represented as liquid droplets in global climate models. But according to the new research published in Nature, the physical state of SOA particles formed in coniferous forest is solid, most likely glassy soon after their formation.

-One can figure these aerosol particles as tiny children's glass marbles, says Professor Thomas Koop from Bielefeld University, Germany.

The experimental research has been conducted by the group of scientists from Finnish and German universities and institutes (Tampere University of Technology, University of Eastern Finland, Finnish meteorological institute, University of Helsinki, Bielefeld University, and Max Planck Institute for Chemistry). The discovery was made in University of Eastern Finland's experimental laboratory designed by Dr Jorma Joutsensaari.

In the experiments, fine particles formed from volatile compounds emitted by scots pines were studied under controlled conditions, and additional measurements were carried out in a coniferous forest in Hyytil, Finland.

The research results were achieved using a new method developed at Tampere University of Technology by Dr Annele Virtanen.

-The method is based on collecting particles by impaction on metal substrates. If the particles are solid, they bounce off the surface whereas liquid particles do not bounce but adhere to the substrate, says Virtanen.

The results will re-direct the atmospheric fine particle research

The new findings will change many features of the understanding of particle behavior in the atmosphere as the physical state of the particles influences their ability to absorb and release water and other gaseous compounds, as well as their ability to act as cloud or ice nuclei. The solid state affects also the aging and lifetime of the chemical components of air particulate matter by reducing the rates of diffusion and reaction in the particles.

-There have been some discrepancies in previous research results related to SOA particle characteristics, which might be explained by the solid state of the particles. Without doubt our results will re-direct the SOA related research worldwide, comments Professor Ari Laaksonen from Finnish Meteorological Institute.


'/>"/>

Contact: Dr. Annele Virtanen
annele.virtanen@tut.fi
358-401-981-002
Tampere University of Technology
Source:Eurekalert

Related biology news :

1. Wistar Institute researcher receives New Innovator award from NIH
2. NC State researchers get to root of parasite genome
3. White Mountain Research Station to host climate change conference
4. Stevens awarded $1M for advanced biofuels research
5. Researchers find animal with ability to survive climate change
6. Researchers find an essential gene for forming ears of corn
7. Researchers note differences between people and animals on calorie restriction
8. Researcher working on destruction of chemical weapons
9. Researchers study acoustic communication in deep-sea fish
10. Researchers discover that growing up too fast may mean dying young in honey bees
11. The Rett Syndrome Research Trust launches operations
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/22/2016)... , June 22, 2016   ... management and verification solutions, has partnered with ... software solutions for Visitor Management, Self-Service Kiosks ... provides products that add functional enhancements to ... provides corporations and venues with an automated ...
(Date:6/16/2016)... 2016 The global ... reach USD 1.83 billion by 2024, according to ... Technological proliferation and increasing demand in commercial buildings, ... drive the market growth.      (Logo: ... development of advanced multimodal techniques for biometric authentication ...
(Date:6/7/2016)... -- Syngrafii Inc. and San Antonio Credit Union (SACU) ... Syngrafii,s patented LongPen™ eSignature "Wet" solution into SACU,s ... in greater convenience for SACU members and operational ... document workflow and compliance requirements. Logo ... Highlights: ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... IL (PRWEB) , ... December 01, 2016 , ... ... to congratulate long-term client Nanowear on their recent FDA Class II 510(k) clearance ... cleared a significant hurdle in commercializing remote cardiac monitoring devices that rely on ...
(Date:12/2/2016)... , December 2, 2016 The immunohistochemistry ... growing at a CAGR of 7.3% during the forecast period of ... and diagnostic laboratories segment accounted for the largest share of immunohistochemistry ... ... on global immunohistochemistry (IHC) market spread across 225 pages, profiling 10 ...
(Date:11/30/2016)... 2016 The global Pyrogen Testing ... a dominant share in the overall market. The leading ... and Merck KGaA, held a lion,s share of 51% ... observes that these companies are expected to retain their ... are do not require rabbit pyrogen testing along with ...
(Date:11/30/2016)... /PRNewswire/ -  Equicare Health Inc ., the leading supplier ... one of the top 100 companies in the 2016 ... distinguishes the top digital health companies across the globe. ... this year continually upgrading our product with the ongoing ... team," says Len Grenier , CEO of Equicare ...
Breaking Biology Technology: