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:4/26/2016)... -- Research and Markets has announced the ...  report to their offering.  , ,     (Logo: ... forecast the global multimodal biometrics market to grow ... 2016-2020.  Multimodal biometrics is being implemented ... healthcare, BFSI, transportation, automotive, and government for controlling ...
(Date:4/13/2016)... CHICAGO , April 13, 2016  IMPOWER physicians ... are setting a new clinical standard in telehealth ... By leveraging the higi platform, IMPOWER patients can ... weight, pulse and body mass index, and, when they ... quick and convenient visit to a local retail location ...
(Date:3/22/2016)... 22, 2016 According ... Market for Consumer Industry by Type (Image, Motion, ... (Communication & IT, Entertainment, Home Appliances, & ... to 2022", published by MarketsandMarkets, the market ... reach USD 26.76 Billion by 2022, at ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... June 27, 2016   Ginkgo Bioworks , a ... engineering, was today awarded as one of the ... the world,s most innovative companies. Ginkgo Bioworks is ... the real world in the nutrition, health and ... directly with customers including Fortune 500 companies to ...
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers and ... and the 6000i models are higher end machines that use the more unconventional z-dimension ... light beam from the bottom of the cuvette holder. , FireflySci has developed ...
(Date:6/23/2016)... ... 23, 2016 , ... UAS LifeSciences, one of the leading ... UP4™ Probiotics, into Target stores nationwide. The company, which has been manufacturing high ... its list of well-respected retailers. This list includes such fine stores as Whole ...
(Date:6/23/2016)... SILVER SPRING, Md. , June 23, 2016 ... evidence collected from the crime scene to track the criminal ... sick, and the U.S. Food and Drug Administration (FDA) uses ... Sound far-fetched? It,s not. ... whole genome sequencing to support investigations of foodborne illnesses. Put ...
Breaking Biology Technology: