Navigation Links
Interactions with aerosols boost warming potential of some gases
Date:10/30/2009

Earth. They are also related to the formation of acid rain and can cause respiratory distress and other health problems for those who breathe them.

Human activity is a major source of sulfate aerosols, but smokestacks don't emit sulfate particles directly. Rather, coal power production and other industrial processes release sulfur dioxide -- the same gas that billows from volcanoes -- that later reacts with atmospheric molecules called hydroxyl radicals to produce sulfates as a byproduct. Hydroxyl is so reactive scientists consider it an atmospheric "detergent" or "scrubber" because it cleanses the atmosphere of many types of pollution.

In the chemical soup of the lower atmosphere, however, sulfur dioxide isn't the only substance interacting with hydroxyl. Similar reactions influence the creation of nitrate aerosols. And hydroxyls drive long chains of reactions involving other common gases, including ozone.

Methane and carbon monoxide use up hydroxyl that would otherwise produce sulfate, thereby reducing the concentration of sulfate aerosols. It's a seemingly minor change, but it makes a difference to the climate. "More methane means less hydroxyl, less sulfate, and more warming," Shindell explained.

His team's modeling experiment, one of the first to rigorously quantify the impact of gas-aerosol interactions on both climate and air quality, showed that increases in global methane emissions have caused a 26 percent decrease in hydroxyl and an 11 percent decrease in the number concentration of sulfate particles. Reducing sulfate unmasks methane's warming by 20 to 40 percent over current estimates, but also helps reduce negative health effects from sulfate aerosols.

In comparison, the model calculated that global carbon monoxide emissions have caused a 13 percent reduction in hydroxyl and 9 percent reduction in sulfate aerosols.

Nitrogen oxides -- pollutants produced largely by power plants, trucks, and cars
'/>"/>

Contact: Sarah DeWitt
sarah.l.dewitt@nasa.gov
301-286-0535
NASA/Goddard Space Flight Center
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. New windows opened on cell-to-cell interactions
2. Research explores interactions between nanomaterials, biological systems
3. Researchers unzip molecules to measure interactions keeping DNA packed in cells
4. Social interactions can alter gene expression in the brain, and vice versa
5. New method provides panoramic view of protein-RNA interactions in living cells
6. Penn biophysicists create new model for protein-cholesterol interactions in brain and muscle tissue
7. Photonic crystal biosensors detect protein-DNA interactions
8. ESF conference probes waters mysterious interactions at molecular level
9. Workshop assesses interactions between climate, forests and land use in the Amazon Basin
10. Stowers Proteomics Center devises method for assigning probabilities to human protein interactions
11. New Argonne study may shed light on protein-drug interactions
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... 2014  23andMe, Inc., the leading personal genetics company, today announced ... genetic ancestry of individuals from across the United ... than four hundred years ago, the United States ... from different continents. This study illuminates how American history and ...
(Date:12/17/2014)... Dec. 16, 2014 Valencell, a leader in performance ... technology to industry leaders such as Intel, Jabra, Atlas, ... biometric wearable products. These products will be showcased at ... Las Vegas . "Our partners ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has announced the addition of the ... their offering. One major trend emerging ... systems. Multimodal biometric systems utilize more than one characteristic ...
Breaking Biology News(10 mins):23andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... The most robust statistical examination to date of our species, ... all living humans -- confirms that she lived about 200,000 ... side-by-side comparison of 10 human genetic models that each aim ... of assumptions about the way humans migrated, expanded and spread ...
... lead to a brand new class of drugs to treat ... back pain without numbing the whole body. The ... (BBSRC) and working at UCL (University College London), have shown ... are regulated by molecules inside cells called small RNAs. This ...
... the best of times, but plants have an extra difficulty. If ... and reproduce, you will want your flowerstalks to be long. That ... But if your stalk is too long, you,ll stand out to ... used to be thought that carnivorous plants like Sundews had the ...
Cached Biology News:Mother of all humans lived 200,000 years ago 2Mother of all humans lived 200,000 years ago 3Scientists uncover Achilles heel of chronic inflammatory pain 2Sundews just want to be loved 2
(Date:1/22/2015)... 2015 GEA Niro Soavi the leader ... homogenizer, the PandaPLUS 2000, which is ideal for new ... cell disruption . This compact laboratory homogenizer is ... liquid food, food additives and ingredients as well as ...
(Date:1/22/2015)... Crystal Diagnostics (CDx) Xpress System, a rapid ... AOAC-PTM Certifications for the six non-O157 Shiga toxin-producing E. coli ... to as STEC or the “Big-6”) as well as Escherichia ... per 325 g of raw ground beef and raw beef ...
(Date:1/22/2015)... Selexis SA, a serial innovation company with ... used for drug discovery to commercial manufacturing, announced today ... Next-Generation Sequencing (NGS) data packages. The NGS analysis ... ensuring the integrity of the gene, validation of the ...
(Date:1/22/2015)... 22, 2015   GenoSpace , a precision medicine software company ... the broad use of genomic, imaging and other biomedical data ... Michelle Munson , CEO of Aspera, an IBM Company, ... - http://photos.prnewswire.com/prnh/20150122/170713 "We are pleased ...
Breaking Biology Technology:GEA Niro Soavi Announces the PandaPLUS 2000 Homogenizer for Processing New Applications for Nanoemulsions and Cell Disruption 2Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2GenoSpace Expands Board with Appointment of Michelle Munson 2
... Calif., March 6 Finesse Solutions, LLC, Santa Clara, ... life sciences process applications, announced the technical demonstration of ... at Interphex in New York on March 17, 2009.The ... consisting of a disposable sheath, an optical reader, and ...
... SEATTLE, March 6 Cell Therapeutics, Inc. (CTI) (Nasdaq ... a letter from The NASDAQ Stock Market indicating that ... the listing of the Company,s common stock on The ... or before April 6, 2009, the Company demonstrate compliance ...
... 6 Irvine Scientific, a leading medical device/biopharmaceutical company ... the addition of IS CHO-CD XP(TM) Culture System to ... Culture System is a set of chemically-defined*, serum-free, and ... deliver robust cell growth and production for recombinant CHO ...
Cached Biology Technology:Finesse Demonstrates TruFluor(TM) pH, a Single-Use Optical pH Sensor and Transmitter 2Cell Therapeutics Announces Receipt of NASDAQ Listing Update 2Cell Therapeutics Announces Receipt of NASDAQ Listing Update 3Irvine Scientific Launches IS CHO-CD XP(TM) 2
...
ChIP-GLAS kit for H10K-B microarray chips. Contains ChIP kit, GLAS kit, and hybridization kit. Additional reagents are required. Please see manual for details. Contains sufficient reagent for 20 reac...
BD BaculoGoldTM Transfection Kit 5 transfections...
...
Biology Products: