Navigation Links
CO2 levels rising in troposphere over rural areas
Date:12/3/2009

Spanish researchers have measured CO2 levels for the past three years in the troposphere (lower atmosphere) over a sparsely inhabited rural area near Valladolid. The results, which are the first of their kind in the Iberian Peninsula, show that the levels rose "significantly" between 2002 and 2005.

Over recent years, physicists and meteorologists have been trying to find out about carbon dioxide (CO2) levels, and how these have evolved in the troposphere over various urban and rural areas around the planet. Now a scientific team from the University of Valladolid (UVA) has published the first and to date the only measurements for the Iberian Peninsula.

The study, published in the latest issue of the journal Theoretical and Applied Climatology and led by M Luisa Snchez, a researcher from the UVA's Atmospheric Pollution Group, shows that CO2 levels increased by 8 ppm (parts per million) between 2002 and 2005. A broader study has led the researchers to predict "an annual increase of 3 ppm" in the study area.

"The levels of this gas in uncontaminated atmospheres depend on emissions from the ground, as well as plant respiration and photosynthesis, but also on developments in the atmosphere as a whole, which may facilitate or inhibit the dispersal of this substance", Isidro Prez, one of the authors and a researcher from the UVA's Applied Physics Department, tells SINC.

The scientists chose a flat, uncontaminated rural area located 840 metres above sea level and 30 kilometres from the city of Valladolid. Daily and seasonal cycles related to low level jet streams were also identified, using a turbulence indicator, the so-called Richardson number.

The increase in carbon dioxide was factored in with other characteristics observed in uncontaminated areas, such as differences between day and night. "This contrast, which is especially significant in spring, can be explained by plant respiration and photosynthesis processes, and by the turbulence or stratification of the atmosphere", explains Prez.

Other characteristics of the troposphere

Data from a RASS sodar (a device that measures vertical temperature and wind profiles and that has a larger range than conventional meteorological towers) allowed the team to classify wind speed too. These data made it possible to obtain profiles that showed "the existence of low-level jet streams at night time, which were especially low in summer, when they were located at a maximum height of between 200 and 300 metres", says the researcher.

The physicists also analysed the thermal structure of the lower atmosphere, and found "significant daytime cold advections (horizontal transportation of heat by an air current) in springtime, with temperature differences of 4.5C between the highest and lowest wind speeds", adds Prez.


'/>"/>

Contact: SINC
info@plataformasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Related biology news :

1. Low levels of key protein may indicate pancreatic cancer risk
2. Gray whales a fraction of historic levels, genetic research says
3. Folic acid lowers blood arsenic levels, according to Mailman School of Public Health study
4. Study finds that even aloof husbands have lower testosterone levels than unmarried men
5. Folic acid lowers blood arsenic levels in Bangladesh
6. Wildfire drives carbon levels in northern forests
7. Even minute levels of lead cause brain damage in children
8. Manure management reduces levels of antibiotics and antibiotic resistance genes
9. Dartmouth researchers alarmed by levels of mercury and arsenic in Chinese freshwater ecosystem
10. Methadone even at therapeutic levels can kill
11. University of Alberta researchers report breakthrough in lowering bad cholesterol, fatty acid levels
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
CO2 levels rising in troposphere over rural areas
(Date:3/30/2017)... -- The research team of The Hong Kong Polytechnic ... by adopting ground breaking 3D fingerprint minutiae recovery and matching technology, ... accuracy for use in identification, crime investigation, immigration control, security of ... ... A research team led by Dr ...
(Date:3/27/2017)... N.Y. , March 27, 2017  Catholic ... Information and Management Systems Society (HIMSS) Analytics for ... EMR Adoption Model sm . In addition, CHS ... of U.S. hospitals using an electronic medical record ... for its high level of EMR usage in ...
(Date:3/23/2017)... DUBLIN , Mar. 23, 2017 Research ... Anti-Theft System Market Analysis & Trends - Industry Forecast to 2025" ... ... to grow at a CAGR of around 8.8% over the next ... This industry report analyzes the market estimates and forecasts for all ...
Breaking Biology News(10 mins):
(Date:7/20/2017)... ... July 20, 2017 , ... ... of life, today announced its full advisory board. The board comprises leaders spanning ... of James Crooks, PhD, former VP of Engineering, to Chief Technology Officer. Crooks ...
(Date:7/20/2017)... ... 2017 , ... Corporate Directors Forum is recognizing six San Diego directors for ... Awards. , The awards will be presented Thursday, September 7th, from 6 to 9 ... have made significantly positive contributions in the boardrooms of some of our region’s most ...
(Date:7/18/2017)... ... July 18, 2017 , ... Genedata, a leading provider of ... technology company, has implemented Genedata Biologics ™ to scale-up their bispecific antibody ... and Neurodegenerative Diseases. , The need to systematically evaluate large panels of ...
(Date:7/18/2017)... Fairfield, NJ (PRWEB) , ... July 18, 2017 ... ... in corporate finance technology, DataForm Software ( https://dataformsoftware.com ) announces the migration of ... – to Microsoft Azure. Planet is a team-centric, enterprise work management system that ...
Breaking Biology Technology: