ORIGIN OF BACKGROUND OZONE IN SURFACE AIR OVER THE UNITED STATES: CONTRIBUTION TO POLLUTION EPISODES Daniel J. Jacob and Arlene M. Fiore Atmospheric Chemistry.

Slides:



Advertisements
Similar presentations
INTERCONTINENTAL PM AND OZONE POLLUTION: IMPLICATIONS FOR AIR QUALITY STANDARDS Daniel J. Jacob Harvard University
Advertisements

MODELING TRANSPORT OF OZONE AND FINE PARTICLES TO AND FROM NORTH AMERICA Daniel J. Jacob Harvard University with Arlene M. Fiore, Rokjin Park, Colette.
CO budget and variability over the U.S. using the WRF-Chem regional model Anne Boynard, Gabriele Pfister, David Edwards National Center for Atmospheric.
AIR POLLUTION IN THE US : Ozone and fine particulate matter (PM 2.5 ) are the two main pollutants 75 ppb (8-h average) 15  g m -3 (1-y av.)
A statistical method for calculating the impact of climate change on future air quality over the Northeast United States. Collaborators: Cynthia Lin, Katharine.
QUESTIONS 1.Is hexane more or less reactive with OH than propane? 2.Is pentene or isoprene more reactive with OH?
Data assimilation of trace gases in a regional chemical transport model: the impact on model forecasts E. Emili 1, O. Pannekoucke 1,2, E. Jaumouillé 2,
Seasonal Variations in the Mixing Layer in the UTLS Dave MacKenzie University of Toronto GEOS-Chem Meeting April 2009.
Chemistry-climate interactions: a new direction for GEOS-CHEM GEOS-CHEM research to date GCAP project Current project: drive GEOS-CHEM into.
Integrating satellite observations for assessing air quality over North America with GEOS-Chem Mark Parrington, Dylan Jones University of Toronto
Origin and distribution of ozone in the Eastern Mediterranean - Results with GEOS-CHEM simulations Origin and distribution of ozone in the Eastern Mediterranean.
Transpacific transport of pollution as seen from space Funding: NASA, EPA, EPRI Daniel J. Jacob, Rokjin J. Park, Becky Alexander, T. Duncan Fairlie, Arlene.
Effect of global change on ozone air quality in the United States Shiliang Wu, Loretta Mickley, Daniel Jacob, Eric Leibensperger, David Rind.
INTERCONTINENTAL TRANSPORT OF TROPOSPHERIC OZONE AND PRECURSORS AT NORTHERN MIDLATITUDES: IMPLICATIONS FOR SURFACE AIR QUALITY AND GLOBAL CHANGE Daniel.
Intercontinental Source Attribution of Ozone Pollution at Western U.S. Sites Using an Adjoint Method Lin Zhang, Daniel J. Jacob, Monika Kopacz Harvard.
INTERCONTINENTAL TRANSPORT OF OZONE AND AEROSOLS Daniel J. Jacob and support from NOAA, EPRI, NASA, EPA (ICAP) with T. Duncan Fairlie, Colette L. Heald,
Effect of global change on U.S. ozone air quality Shiliang Wu Loretta J. Mickley Daniel J. Jacob Eric M. Leibensperger David Rind (NASA/GISS)
GEOS-CHEM GLOBAL 3-D MODEL OF TROPOSPHERIC CHEMISTRY Assimilated NASA/DAO meteorological observations for o x1 o to 4 o x5 o horizontal resolution,
ATMOSPHERIC CHEMISTRY: FROM AIR POLLUTION TO GLOBAL CHANGE AND BACK Daniel J. Jacob.
INTERCONTINENTAL TRANSPORT OF AIR POLLUTION WITH GMI AND PLANS FOR THE NEW HEMISPHERIC TRANSPORT OF AIR POLLUTANTS (HTAP) MODEL INTERCOMPARISON STUDY ROKJIN.
Transboundary influences on US background ozone Huiqun Wang 1 Philippe Le Sager 2 Rokjin Park 3
CONTINENTAL OUTFLOW AND INTERCONTINENTAL TRANSPORT AT NORTHERN MIDLATITUDES (and a few UT/LS topics) Daniel J. Jacob Atmospheric Chemistry Modeling Group.
FROM AIR POLLUTION TO GLOBAL CHANGE AND BACK: Towards an integrated international policy for air pollution and climate change Daniel J. Jacob Harvard University.
Application of a unified aerosol-chemistry-climate GCM to understand the effects of changing climate and global anthropogenic emissions on U.S. air quality.
OMI HCHO columns Jan 2006Jul 2006 Policy-relevant background (PRB) ozone calculations for the EPA ISA and REA Zhang, L., D.J. Jacob, N.V. Smith-Downey,
Impact of Emissions on Intercontinental Long-Range Transport Joshua Fu, Yun-Fat Lam and Yang Gao, University of Tennessee, USA Rokjin Park, Seoul National.
INTERACTIONS OF AIR POLLUTION AND CLIMATE CHANGE Daniel J. Jacob How do air pollutants contribute to climate change? How will climate change affect air.
ASSESSING INTERCONTINENTAL TRANSPORT OF OZONE AND AEROSOLS AT NORTHERN MID-LATITUDES WITH GMI Daniel J. Jacob, Rokjin J. Park, Shiliang Wu, Colette L.
Simulation Experiments for GEO-CAPE Regional Air Quality GEO-CAPE Workshop September 22, 2009 Peter Zoogman, Daniel J. Jacob, Kelly Chance, Lin Zhang,
R C Hudman, D J Jacob, S Turquety, L Murray, S Wu, Q Liang,A Gilliland, M Avery, T H Bertram, E Browell, W Brune, R C Cohen, J E Dibb, F M Flocke, J Holloway,
Pathways for North American Outflow - Hindcast for ICART 2 Qinbin Li, Daniel J. Jacob, Rokjin Park, Colette L. Heald, Yuxuan Wang, Rynda Hudman, Robert.
The effect of pyro-convective fires on the global troposphere: comparison of TOMCAT modelled fields with observations from ICARTT Sarah Monks Outline:
Presented at the AQAST 9 th Semiannual Meeting Wednesday June 3 rd, 2015 Presentation by: Dan Goldberg, Ph.D. Candidate Co-authors: Tim Canty, Tim Vinciguerra,
Evidence for an increase in the photochemical lifetime of ozone in the eastern United States Presented at the 14 th CMAS Meeting Wednesday October 7 th,
Asian Sources of Methane and Ethane Y. Xiao, D.J. Jacob, J. Wang, G.W. Sachse, D.R. Blake, D.G. Streets, et al. Atmospheric Chemistry Modeling Group Harvard.
TROPOSPHERIC CHEMISTRY: FROM AIR POLLUTION TO GLOBAL CHANGE AND BACK Daniel J. Jacob.
Background Ozone in Surface Air over the United States: Variability, Climate Linkages, and Policy Implications Arlene M. Fiore Department of Atmospheric.
Variability in surface ozone background over the United States: Implications for air quality policy Arlene Fiore 1, Daniel J. Jacob, Hongyu Liu 2, Robert.
QUESTIONS 1.Is hexane more or less reactive with OH than propane? 2.Is pentene or isoprene more reactive with OH? 3.Using the EKMA diagram (the ozone isopleth.
NATURAL AND TRANSBOUNDARY POLLUTION INFLUENCES ON AEROSOL CONCENTRATIONS AND VISIBILITY DEGRADATION IN THE UNITED STATES Rokjin J. Park, Daniel J. Jacob,
OVERVIEW OF ATMOSPHERIC PROCESSES: Daniel J. Jacob Ozone and particulate matter (PM) with a global change perspective.
MOZART Development, Evaluation, and Applications at GFDL MOZART Users’ Meeting August 17, 2005 Boulder, CO Arlene M. Fiore Larry W. Horowitz
Hemispheric transport of ozone pollution and the nonlinearities GMI meeting UC Irvine March 17, 2008 Shiliang Wu, Harvard Bryan Duncan, NASA / GSFC Arlene.
GEOS-CHEM Modeling for Boundary Conditions and Natural Background James W. Boylan Georgia Department of Natural Resources - VISTAS National RPO Modeling.
Estimating background ozone in surface air over the United States with global 3-D models of tropospheric chemistry Description, Evaluation, and Results.
Variability in surface ozone background over the United States: Implications for air quality policy Arlene Fiore 1, Daniel J. Jacob, Hongyu Liu 2, Robert.
REGIONAL/GLOBAL INTERACTIONS IN ATMOSPHERIC CHEMISTRY Greenhouse gases Halocarbons Ozone Aerosols Acids Nutrients Toxics SOURCE CONTINENT REGIONAL ISSUES:
Simulation Experiments for TEMPO Air Quality Objectives Peter Zoogman, Daniel Jacob, Kelly Chance, Xiong Liu, Arlene Fiore, Meiyun Lin, Katie Travis, Annmarie.
GEOS-CHEM global model of tropospheric chemistry (www-as.harvard.edu/chemistry/trop/geos) assimilated meteorological data from NASA DAO, o.
CHARGE QUESTIONS: ENDPOINTS  anthropogenic emissions   air pollution   climate OK, but can we be more specific?  Intercontinental transport of.
WORKSHOP ON CLIMATE CHANGE AND AIR QUALITY : part I: Intercontinental transport and climatic effects of pollutants OBJECTIVE: Define a near-term (-2003)
The Double Dividend of Methane Control Arlene M. Fiore IIASA, Laxenburg, Austria January 28, 2003 ANIMALS 90 LANDFILLS 50 GAS 60 COAL 40 RICE 85 TERMITES.
BACKGROUND AEROSOL IN THE UNITED STATES: NATURAL SOURCES AND TRANSBOUNDARY POLLUTION Daniel J. Jacob and Rokjin J. Park with support from EPRI, EPA/OAQPS.
Background ozone in surface air over the United States Arlene M. Fiore Daniel J. Jacob US EPA Workshop on Developing Criteria for the Chemistry and Physics.
Why care about methane Daniel J. Jacob. Global present-day budget of atmospheric methane Wetlands: 160 Fires: 20 Livestock: 110 Rice: 40 Oil/Gas: 70 Coal:
TROPOSPHERIC OZONE AS A CLIMATE GAS AND AIR POLLUTANT: THE CASE FOR CONTROLLING METHANE Daniel J. Jacob with Loretta J. Mickley, Arlene M. Fiore, Yaping.
Linking regional air pollution with global chemistry and climate:
Daniel J. Jacob Harvard University
Global Change and Air Pollution
INTERCONTINENTAL TRANSPORT OF TROPOSPHERIC OZONE AND PRECURSORS AT NORTHERN MIDLATITUDES: IMPLICATIONS FOR SURFACE AIR QUALITY AND GLOBAL CHANGE Daniel.
The Double Dividend of Methane Control
Daniel J. Jacob Harvard University
Global atmospheric changes and future impacts on regional air quality
Intercontinental Transport, Hemispheric Pollution,
Linking Ozone Pollution and Climate Change:
AIR POLLUTION AND GLOBAL CHANGE: TOWARDS AN INTEGRATED POLICY
Questions for consideration
Effects of global change on U.S. ozone air quality
Pathways for North American Outflow - Hindcast for ICART2
Presentation transcript:

ORIGIN OF BACKGROUND OZONE IN SURFACE AIR OVER THE UNITED STATES: CONTRIBUTION TO POLLUTION EPISODES Daniel J. Jacob and Arlene M. Fiore Atmospheric Chemistry Modeling Group Harvard University

THE PROBLEM Ozone in surface air over the U.S. in summer includes a ppbv background transported from outside the continental boundary layer –Evidence from O3 vs. (NOy-NOx) correlations, O 3 frequency distributions, measurements at clean sites, models. Nineteenth-century observations (Europe) indicate 5-10 ppbv O3, preindustrial models calculate ppbv O3. What is the origin of the present-day background, and how does it contribute to pollution episodes?

GEOS-CHEM GLOBAL 3-D MODEL OF TROPOSPHERIC CHEMISTRY: APPLICATION TO SUMMER 1995 SIMULATION OF REGIONAL O 3 POLLUTION IN THE U.S. AIRS, SOS, NARSTO-NE observations Assimilated meteorological observations from NASA DAO 2 o x2.5 o horizontal resolution, 26 vertical layers 120 chemical species to describe tropospheric O3-NOx-hydrocarbon chemistry; aerosol effects on chemistry, radiation SAMI July 1995 emission inventory for eastern U.S.

SUMMER 1995 AFTERNOON OZONE IN SURFACE AIR OVER THE U.S. AIRS observations GEOS-CHEM (r 2 = 0.4, bias=3 ppbv)

FREQUENCY DISTRIBUTION OF SURFACE p.m. O 3 IN WESTERN MASSACHUSETTS IN SUMMER 1995 Observations (squares, triangles) Model (crosses) Air quality standard

MEAN AFTERNOON OZONE BACKGROUND IN MODEL, SUMMER 1995 Background is tagged as ozone produced outside the N. American boundary layer (surface-700 hPa)

DEPLETION OF OZONE BACKGROUND DURING POLLUTION EPISODES (due to regional stagnation, short O 3 lifetime) Background (clean conditions) O 3 vs. (NO y -NO x ) At Harvard Forest, Massachusetts Background (pollution episodes)

FREQUENCY DISTRIBUTION OF AFTERNOON BACKGROUND OZONE CONCENTRATIONS IN U.S. SURFACE AIR IN SUMMER 1995 (model) summer ensemble vs. pollution episodes Convection upwind occasionally results in high background during pollution episodes

ASIAN/EUROPEAN POLLUTION ENHANCEMENT OF BACKGROUND OZONE IN U.S. Mean model values, summer 1995 (4 o x5 o resolution) “Natural” background (no anthropogenic emissions of NO x or NMHCs anywhere, but present-day CH 4 ) Asian/European anthropogenic enhancement above natural background (no anthropogenic emissions in North America)

RANGE OF ASIAN/EUROPEAN POLLUTION OZONE ENHANCEMENTS OVER THE UNITED STATES ensemble of model results, summer 1995 Max enhancements (up to 14 ppbv) under moderately polluted conditions (50-70 ppbv O3) MAJOR CONCERN IF OZONE STANDARD WERE TO DECREASE TO 60 PPBV!