Geometry.Net - Basic_A: Atmospheric Chemistry

LAC - Laboratory Of Atmospheric Chemistry
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http://lac.web.psi.ch/
NASA GISS: Atmospheric Chemistry
Skip to page content. atmospheric chemistry. atmospheric chemistryis the study of the chemical constituents of Earth's atmosphere
http://www.giss.nasa.gov/research/chemistry/

Extractions: Atmospheric chemistry is the study of the chemical constituents of Earth's atmosphere, and the roles they play in influencing the atmosphere's temperature, radiation, and dynamics. Changes in the composition of the atmosphere can affect the habitability of the planet, for example, by altering long-term climate, depleting the ozone layer, or affecting air quality at the ground. Research in this field is therefore concerned with biogenic and anthropogenic emissions, trace gas distributions, and the chemical reactions of molecules and atoms in the atmosphere. Research in atmospheric chemistry at GISS includes near-term issues such as air quality and ozone depletion but is primarily focused on the longer-term linkages between atmospheric chemistry and global climate. Changes in the emission of chemical species naturally present in the atmosphere, such as the greenhouse gases carbon dioxide (CO ), methane (CH ) and nitrous oxide (N O), or the addition of human-made chemicals such as chlorofluorocarbons (CFCs), can affect climate by directly changing the absorption of radiation, and hence temperatures and dynamics. Chemical reactions involving these gases can also upset the chemical balance in the atmosphere, with effects such as depletion of Earth's protective stratospheric ozone layer or a reduction in the capacity of the troposphere to oxidize biogenic and anthropogenic emissions. Furthermore, these changes are all intricately connected, with temperature changes affecting the rates of chemical reactions, radiation changes affecting the rates of photochemical reactions, and dynamics changes affecting the distributions of all chemical species. We must therefore be concerned with the entire system, including Earth's biosphere for chemical emissions, the atmospheric circulation for transport of chemical species, the absorption of radiation, and the chemical reactions that take place in the atmosphere. Including chemistry in the GISS general circulation model allows us to simulate the non-linear interactions between all these components in our investigations of chemistry and climate change.
Molecular Physics Laboratory - Research And Development In Laser Sensors And Dia
SRI's Physics and atmospheric chemistry group has a worldwide reputation for its fundamental and applied Category Science Physics Academia Research Laboratories Our team's experience includes atmospheric chemistry and Physics Aeronomy,chemical kinetics, modeling, high temperature air chemistry.
http://www.sri.com/psd/physics/

Extractions: SRI's Molecular Physics Laboratory provides government and commercial clients with fundamental and applied research in areas involving laser sensors and diagnostics, mass spectroscopy, and atmospheric processes. The laboratory operates a Research Experiences for Undergraduates Program , providing undergraduate students with summer research opportunities. Our team's experience includes:
Marine And Atmospheric Chemistry
Carries out broadly based research on the chemistry of marine waters and the marine atmosphere, and maintains a highquality well-rounded graduate program leading to the MS and Ph.D. degrees.
http://www.rsmas.miami.edu/divs/mac.html

Extractions: The Division of Marine and Atmospheric Chemistry (MAC) carries out broadly based research on the chemistry of marine waters and the marine atmosphere, and maintains a high-quality well-rounded graduate program leading to the MS and Ph.D. degrees. The Division's activities are focused on understanding the cycling and transport of chemicals in the oceans and atmosphere. A central theme underlying much of the research in the Division is to use our understanding of geochemical cycles in order to assess the impact of man's activities on global and regional scales. The Division has fifteen faculty members and a large support staff involved in research including postdoctoral fellows, technicians, and graduate research assistants. The Division occupies the newest building on campus, which houses a major part of the School's chemical research activity. There is research on collaborative projects with the other Divisions at the Rosenstiel School especially Meteorology and Physical Oceanography, Marine Biology and Fisheries, and Marine Geology and Geophysics. The faculty of MAC cooperate closely with the Chemistry Department , located on the main campus of the University of Miami. Faculty members from MAC teach courses in the Department and members from the Division and the Department frequently serve on student committees across departmental boundaries. The Division also benefits from its association with the
SRI: PSD's Atmospheric Chemistry
atmospheric chemistry Rate constants for bimolecular reactive and energy transfercollisions are required for models of the atmosphere and to interpret
http://www.sri.com/psd/research/atmos.html

Extractions: Models of the mesosphere and upper stratosphere predict concentrations of OH, O3, and HO2 that do not agree with recently available concentrations extracted from satellite observations. These chemical species have such short chemical lifetimes that their concentration is controlled by chemistry as opposed to transport. Sensitivity analysis shows the reactions O+HO2 and OH+HO2 are the key players in the chemistry of the HOx cycle, which controls the composition of the mesosphere and the upper stratosphere. Laboratory experiments to measure the rate constants of these reactions as a function of temperature are currently under way with support with NASA. The absorption of sunlight, photodissociation of the excited molecules, and the chemical reaction of the dissociation products drive the reactivity of the earth's atmosphere. Electronically and vibrationally excited atoms and molecules are produced in the earth's atmosphere by solar radiation and chemical reaction; some of these excited species radiate light. The spectral distribution of this light and the reactivity of the atmosphere are both controlled by energy transfer collisions. Energy transfer collisions are also important to quantitatively understand optical measurements of trace species in the atmosphere. Laboratory measurements to understand key energy transfer pathways and validate atmospheric sensor strategies are sponsored by NASA. Strategies for detecting OH and NO
Atmospheric Chemistry Home Page-OGP
atmospheric chemistry Previous Program Announcements. What's New. Meetings and Events.Links. Info. atmospheric chemistry Contact Info. Return to Program Elements.
http://www.ogp.noaa.gov/mpe/atmochem/
ACD
atmospheric chemistry Division. The atmospheric chemistry Division'sgoals are to identify and quantify the natural and anthropogenic
http://www.ncar.ucar.edu/ncar/acd.html

Extractions: The Atmospheric Chemistry Division's goals are to identify and quantify the natural and anthropogenic processes that regulate the chemical composition of the troposphere and middle atmosphere and to assess future changes caused by human activities. ACD conducts scientific research focusing on the photochemistry of the troposphere, biosphere/atmosphere interactions, middle atmospheric dynamics and chemistry, as well as climate/chemistry couplings. Laboratory projects, field campaigns, data interpretation and modeling studies are developed to address societally important questions related to global and regional environmental changes. ACD homepage
EGU - Atmospheric Chemistry And Physics
An international scientific journal dedicated to the publication and discussion of high quality studies investigating the Earth's atmosphere and the underlying chemical and physical processes.
http://www.copernicus.org/EGS/acp/

Extractions: Find a Paper Comment on a Paper Submit a Manuscript Subscription and Charges ... Special Issues Atmospheric Chemistry and Physics (ACP) is an international scientific journal dedicated to the publication and discussion of high quality studies investigating the Earth's atmosphere and the underlying chemical and physical processes. ACP has an innovative two-stage publication process which involves a scientific discussion forum and exploits the full potential of the internet to In the first stage, papers that pass a rapid access peer-review are immediately published on the Atmospheric Chemistry and Physics Discussions (ACPD) website. They are then subject to interactive public discussion, during which the referees' comments (anonymous or attributed), additional short comments by other members of the scientific community (attributed) and the authors' replies are also published in ACPD. In the second stage, the peer-review process is completed and final revised papers are published in ACP. To ensure publication precedence for authors, and to provide a lasting record of scientific discussion, ACPD and ACP are both ISSN-registered, permanently archived and fully citable. For more information see
Atmospheric Chemistry
atmospheric chemistry. Dr. Sonia Kreidenweis. Related Web Sites AtmosphericChemistry Group. Biocycle Denning Research Group. Collett Research Group.
http://www.atmos.colostate.edu/research/chem.html

Extractions: Atmospheric Chemistry Studies conducted relate to the atmospheric processing of various chemical species and their impacts on pollutant deposition, visibility, and human health. Research includes examination of aerosol particles and trace gases, air quality issues including visibility, and aerosol-cloud-climate interactions. Both experimental and modeling components are employed, as well as the design and use of instrumentation for aerosol, cloud and fog sampling. A comprehensive laboratory is housed within the Department for chemical analysis of collected samples and for characterization of instrument performance. Related Faculty Members Dr. Jeffrey L. Collett Dr. A. Scott Denning Dr. Sonia Kreidenweis Related Web Sites: Atmospheric Chemistry Group Biocycle - Denning Research Group Collett Research Group Field Project in Yosemite. Left to right: Taehyoung Lee, Gavin McMeeking, Jackie Heath, Guenter Engling Research Areas Atmospheric Chemistry Atmospheric Radiation and Remote Sensing Biosphere and Carbon Cycle Cloud Dynamics ... Contact Us
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The Journal of atmospheric chemistry is devoted to the study of the chemistry of the Earth's atmosphere, the emphasis being laid on the region below about 100 km.
http://ipsapp009.lwwonline.com/ips/nocookies.asp

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2003 GRC On Atmospheric Chemistry
atmospheric chemistry September 712, 2003 Big Sky Resort Big Sky, Montana. 600pm, Dinner. 730 pm - 930 pm, Why Is atmospheric chemistry Important?
http://www.grc.uri.edu/programs/2003/atmchem.htm
2001 GRC On ATMOSPHERIC CHEMISTRY
atmospheric chemistry SALVE REGINA UNIVERSITY NEWPORT, RI JUNE 1722, 2001.Stanley P. Sander, Chair Barbara J. Finlayson-Pitts, Vice-Chair.
http://www.grc.uri.edu/programs/2001/atmochem.htm

Extractions: Barbara J. Finlayson-Pitts , Vice-Chair Visit the Conference Home Page for more information. Financial support from the following organizations and agencies is gratefully acknowledged: SUNDAY, JUNE 17 2:00-11:00 p. m. 6:00 p.m. Dinner Welcome Satellite Measurements of the Troposphere 7:30 p. m. Introduction by Discussion Leader A. Thompson R. Kahn
Atmospheric Chemistry Home Page
atmospheric chemistry and Air Pollution PEOPLE. Faculty Appointments ALLEN, Dale,Asst. Research Scientist. atmospheric chemistry and Air Pollution RESEARCH.
http://www.atmos.umd.edu/~russ/chemistry.html

Extractions: Click here for Atmospheric Chemistry Material Safety Data Sheets Atmospheric chemistry is a young field with vital new discoveries being made at a rapid rate. Our understanding of processes such as air pollution, stratospheric ozone depletion, global biogeochemical cycles, and global climate change is limited by the available observational data and by the number of trained investigators in this area. At the University of Maryland our research has focused on building the data base, using these data to improve numerical simulations, using computer model output to identify definitive measurements - through a balance of experiment and theory we can better understand the atmosphere. Collaboration with scientists from other disciplines helps to expand the range of people and variety of tools available to tackle these intriguing questions. Thunderstorms and Air Pollution The Indian Ocean Experiment Gas-Particle Interactions Long-Term Monitoring ... Remote Sensing of Trospheric Chemistry Sampling tower aboard NOAA R/V Ronald H. Brown.
Atmospheric Chemistry Program
Research into regional and continental chemistry and the fate of tropospheric air pollutants, extracontinental and global chemistry and the fate of tropospheric air pollutants, and aerosol genesis.
http://gonzalo.er.anl.gov/ACP/

Extractions: The overall objective of the ACP is to provide DOE with advanced information on the atmospheric environment that is required for long-range energy planning. The research is carried out primarily at four DOE laboratories and approximately twelve universities and non-DOE labs. The thrusts of this research are on regional and continental chemistry and fate of tropospheric air pollutants, extracontinental and global chemistry and fate of tropospheric air pollutants, and aerosol genesis. Laboratory studies emphasize rate and equilibrium processes. Field studies are conducted with aircraft and surface measurements on reaction chemistry, advective influences on the chemical composition of chemistry, and air-surface exchange processes. Modeling efforts address both chemistry and dynamics on regional and global scales. 2003 ASP Annual Meeting - March 4-5, 2003 - Orlando, Florida
Atmospheric Chemistry Research Group
Atmospheric Radiationi IR UV, Clean AIr Cape Grim, UoW Home page,Dept. of Chemistry, Staff Info, Related Topics, Atmospheric Links,
http://www.uow.edu.au/science/research/acrg/
Atmospheric Chemistry Technical Area
atmospheric chemistry Technical Area. Motivation. The primary strength in atmosphericchemistry at the Laboratory is the interdisciplinary nature of our group.
http://www.pnl.gov/atmos_sciences/as_acp.html

Extractions: Atmospheric Chemistry Technical Area Motivation Atmospheric chemistry influences human health, climate, food production and, through its impact on visibility, our view of the world. Chemicals in the air affect us with each breath we take. Suspended particulates that form from gas-phase reactions affect the amount of solar energy reaching the earth's surface. Not only government, but private industry, has a vested interest in improving our knowledge of these processes. Much of the work in atmospheric chemistry at the Pacific Northwest National Laboratory has focused on the fate of energy-related pollutants (e.g., ozone, nitrogen oxides, sulfur) in the lower part of the atmosphere, beginning with their emission into the atmosphere and continuing to their deposition at the Earth's surface. Examples of past work include studies of radionuclide deposition, the long-range transport of sulfur plumes, mechanisms by which sulfate aerosol enters precipitation, homogeneous nucleation mechanisms for the formation of natural aerosols, and the production of ozone from NO x and hydrocarbons. Almost all of our work has involved a combination of field studies using state-of-the-art airborne instrumentation and computer modeling.
Links To Other Atmospheric Chemistry Pages
Links to other atmospheric chemistry pages. Research Sites. AIRSITE AtmosphericChemistry International Research Site; Air Quality Information;
http://www.mpch-mainz.mpg.de/~air/science/links.html
Introduction To Atmospheric Chemistry
Introduction to atmospheric chemistry. What is atmospheric chemistry?Atmospheric chemists are interested in understanding the chemical
http://www.mpch-mainz.mpg.de/~air/intro.html
Chemistry@SUNY-ESF: Faculty Profile Dr. Dibble
Laser spectroscopy and computational chemistry for investigations of atmospheric chemistry site by Ted Dibble.
http://web.syr.edu/~tsdibble/dibble.html

Extractions: Research People Current Projects ... Links to other Sites The Dibble group uses lasers and high-end computers as tools to address questions such as: what are the degradation pathways of organic compounds in the polluted atmosphere? To what extent do particular compounds contribute to the formation of ozone, other air toxics, and particulates? (Answers to these questions are missing for most of the key compounds larger than butane!) The experimental work in Dr. Dibble's laboratory employs pulsed, tunable dye lasers to probe for stable and transient species. Both reaction kinetics and the spectroscopy of new species can be studied using two highly sensitive techniques: laser-induced fluorescence (LIF) and (soon, we hope!) resonance enhanced multi-photon ionization coupled to time-of-flight mass spectrometry (REMPI and TOF-MS). The computational work uses commercially available quantum chemistry programs to carry out ab initio and density functional calculations. These methods are used to map out thermochemical kinetics and to explore and interpret the spectroscopy of as-yet uncharacterized species. See the article about our computational work in Access , the magazine of the National Compuational Science Alliance.
Visible Earth Browse: Atmosphere > Atmospheric Chemistry
Browsing Atmosphere atmospheric chemistry Carbon Monoxide (12 images) Chlorine Monoxide (2 images) Ozone (9 images) Sulfur Dioxide (1 image).
http://visibleearth.nasa.gov/Atmosphere/Atmospheric_Chemistry/

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