PPT-Proposed 2015 Ozone Standard

Air Quality Division Donna F Huff Air Quality Division May 2015 Presentation Outline Proposed Rule Timeline Design Values and Trends Potential Classification Ranges Potential Attainment . 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 Min Huang. (. min.huang@jpl.nasa.gov. ), . K. W. Bowman (JPL), G. R. Carmichael (U Iowa), . M. Lee (JPL), D. K. . Henze. (CU-Boulder), T. Chai (NOAA/ARL) . A. J. . Weinheimer. (NCAR), R. C. Cohen (UC Berkeley). 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. 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. by . David Gray. Scientific use. Background ozone. ozone present through natural or nonlocal sources. currently ranges from 20-45 ppb in North . America. Rising background ozone could mean non-attainment for much of North America. 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. matter. Daniel Cohan and Beata Czader . Department of Civil and Environmental Engineering. Rice University. Background. EPA sets National Ambient . Air Quality . Standards (NAAQS) to protect health. States tasked with attainment. lidar. and other measurement techniques. S. Godin-. Beekmann. 1. , . S. . Khaykin. 1. , . M. . Pastel. 1. , K. Hocke. 2. , E. Mahieu. 3. , M. Palme. 4. . . 1. LATMOS. , . UVSQ-CNRS. 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 @ . found?. The . ozone layer . is the layer of the atmosphere at an altitude of 15 to 40 km (stratosphere) . What is Ozone?. Ozone. . is a molecule made of three oxygen atoms. What is the function of the ozone layer. N. 2. O . under the. Vienna Convention for the Protection of the Ozone Layer and/or . Montreal Protocol on Substances that Deplete the Ozone Layer. Peter M. Grabiel. Institute for Governance & Sustainable Development (IGSD).