PPT-OCTOBER 5, 2011 MAIN MEETING OF OZONE ACTION NETWORKS FROM

LATIN AMERICA AND THE CARIBBEAN Staci Gatica gaticastaciepagov US Licensing System amp Enforcement Activity 2 Presentation Topics Mechanics of US Licensing System and Phaseout Focus on Imports. Stratospheric ozone: the natural cycle Produced in stratosphere by dissociation of oxygen atoms exposed to short-wave radiation Reaction accounts for most of adsorption of ultraviolet sunlight () as w and verification of the connections between ozone depleting substances and the ozone hole. A.R. (Ravi) Ravishankara. NOAA, ESRL/Chemical Sciences Division. Boulder CO, USA. Co-Chair, SAP. Some . personal . The . ozone layer. is a layer in . Earth's atmosphere. which contains relatively high concentrations of . ozone. (O. 3. ). . This layer absorbs 97–99% of the . Sun. 's high frequency . ultraviolet light. Air Quality Division . Mark . Estes. a. , Shaena . Berlin. b. , Andrew . Langford. c. , Melody . Dong. d. , Jim . Smith. a. , Fernando . Mercado. a. , David . Parrish. c. Presented to AQAST Meeting, Rice University. The ozone layer can be saved only by phasing out the use of ozone depleting substances.. ODS. Montreal . Protocol . London Ozone Agreements. Copenhagen Ozone Agreements. Beijing Ozone Agreement. Philippine Ozone Desk. in . the global chemical . transport model (GEOS-. Chem. ) . Cui . Ge. , Jun Wang. Department of Earth & Atmospheric Sciences. Joseph Francisco. Department of Chemistry. 4 May 2015. 7. th. GEOS-. the progression of the Ozone hole over the antarctic from 1970 to 1997.. Some effects on plant and animal tissue as UV radiation increases. decrease in agricultural yields and a decrease in overall forest productivity. Venn Diagram. Compare/Contrast. GLOBAL WARMING. OZONE DEPLETION. Both harm the environment. Both caused by chemicals released by human activities. Caused by high . . levels of . CO. Tuesday, January 5. th. , 2015. Good up high, bad nearby. Troposphere:. Thinnest layer of atmosphere, 80% mass, almost all H. 2. O. 0.04 ppm O. 3. Stratosphere: 10 ppm O. 3. Characteristics of O. 3. Highly poisonous, strong odor, irritant, colorless gas. Ozone produced from the interaction of hydrocarbons and oxides in the presence of sunlight. At ground level, ozone is a pollutant; in the upper atmosphere it protects earth from excess radiation from sun. Updates from . PSU/GSFC/UMD. : Comparisons with . Observations. Anne Thompson, NASA-GSFC. 5 Jan 2015. Nikolay . Balashov (PhD Candidate) . & Greg Garner (Prof G. Young). All at PSU. Background & Principles of PSU/GSFC/UMD AQ Forecasting with Value of Information. Ja. -Ho Koo. EAS 6792 Term project. Introduction. Tropospheric. ozone depletion event (ODE) usually happens in spring,. . polar. . region.. ODE looks strongly related to the amount of atmospheric bromine chemistry based on the heterogeneous reaction (Barrie et al., 1988). Measurements indicate high ozone concentrations in the Great Basin.. Back trajectory analysis and satellite remote sensing will be used to shed light on the causes.. Great Basin National Park: 39.005 N 114.216 W.. Retrievals . from . Joint UV and Visible . Measurements by the . TEMPO. Juseon Bak, Xiong Liu, Chris Miller, Kelly Chance. ,. John Houck, Ewan O’Sullivan, Caroline R. . Nowlan. , G. Gonzalez . Abad @ .