PPT-Variability & uncertainty in background ozone: Relevanc

3 NAAQS EPRI ENVVISION Conference Air QualityBackground Ozone II Washington DC May 11 2016 Arlene M Fiore Acknowledgments Pat Dolwick Terry Keating US EPA M Lin PrincetonGFDL Tom Moore WESTARWRAP G . DEPLETION. What is Ozone?. Two different layers in the atmosphere:. . Troposphere. Stratosphere. . What is ozone layer?. Ozone layer is a thin, fragile shield that contains relatively high concentrations of ozone.. Phil Uttley. T. Wilkinson, P. Cassatella (Southampton). J. Wilms, M. Hanke, M. Böck (FAU) . K. Pottschmidt (NASA-GSFC). Introduction. . BHXRB hard state spectra show clear evidence for both disc and hot coronal components, as well as interaction between them (reflection).. 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. 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. 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. 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. AND CURRENT STATUS. GLY 4241 - Lecture 8 . Fall, 2016. Mount Pinatubo Eruption, 1991. 2. 3. 1997 Montserrat Eruption. 4. Sulfur Dioxide Conversion. 5. Aerosol Optical Depth Analyses. BRW is Pt. Barrow, Alaska. a. ttaining . the new U.S. ozone NAAQS. . Panel on Meeting the New Ozone Standard . Energy Summit 2015. University of Wisconsin, Madison, WI. October 13, 2015. Arlene M. Fiore. Acknowledgments:. . Inkeun. Cho and James Edwards. Overview. What is fabrication variability?. Sources of variability. How to analyze & model variability. Ways to mitigate variability. 2. What is Fabrication Variability?. Study Case: Al . Tadamon. Locality. Blue Nile State, Sudan . . Maha . Abdelgaffar. Gamal . Abdo. Pastoralism. Pastoralism in Sudan is a traditional way of life. It is a product of climatic and environmental factors that has become a form of natural resources use and management. It is increasingly affected by the change in temperature, shifts in rainy seasons and intense rains.. . 1. GROUND-LEVEL OZONE. . Ground level ozone is also known as . smog. . High ozone levels can worsen asthma and other lung conditions.. . It . can be. formed by emissions from sources like power plants, car exhaust and factories.. Stratosphere. Ozone Concentration (ppm). SGC . Fig. 3-11. . OZONE: Sources. Ozone is produced naturally in photochemical reactions in the stratospheric ozone layer --“good ozone” -- is . decreasing. 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.