IMAGERY AND MOVIES Last Updated: 07 Feb 2012  Imagery    Movies

 IMAGERY

2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000

This is an archive of the "pictures of the month" posted monthly on our main group web page. The images illustrate results from our recent papers; they come with explanatory text and a reference to the paper. We hope you will find them useful! Please notify webmaster Bob Yantosca of any broken links.

Also check out Lyatt Jaegle's interactive GEOS-CHEM plotting site to produce your own maps of species simulated by the GEOS-CHEM model.

2012

• Quantifying seasonal methane emissions from the Hudson Bay Lowlands
• Enhancements in particulate matter from SO2, NOx, and CO

2011

• A computationally-efficient, adaptive chemical solver algorithm
• Global atmospheric model for mercury including oxidation by bromine atoms
• Tropical troposphere CO analysis using Aura satellite data and the GEOS-Chem model: insights into transport characteristics of the GEOS met. products
• Improved treatment of the surface ocean in the GEOS–Chem global 3-D biogeochemical model for mercury (Hg)
• Nitrogen oxides and PAN in plumes from boreal fires
• Chemistry of hydrogen oxide radicals (HOx) in the Arctic troposphere in spring
• Intercomparison methods for satellite measurements of atmospheric composition: application to tropospheric ozone from TES and OMI
• Observed correlations of PM2.5 with meteorological variables in the United States
• Impact of mineral dust on nitrate, sulfate, and ozone in transpacific Asian pollution plumes
• Source attribution and interannual variability of Arctic pollution in spring constrained by aircraft (ARCTAS, ARCPAC) and satellite (AIRS) observations of carbon monoxide
• Smoke injection heights from fires in North America

2010

• Global estimates of CO sources by adjoint inversion of multiple datasets (MOPITT, AIRS, SCIAMACHY, TES)
• A new mechanistic global model of Hg biogeochemistry in the terrestrial environment
• Resolving intercontintental pollution plumes in global models of atmospheric transport
• Synthesis of satellite (MODIS), aircraft (ICARTT), and surface (IMPROVE, EPA-AQS, AERONET) aerosol observations over eastern North America to improve MODIS aerosol retrievals and constrain surface aerosol concentrations and sources
• Error correlation between CO2 and CO as constraint for CO2 flux inversions using satellite data
• Intercontinental source attribution of ozone pollutionat western U.S. sites using an adjoint method
• Analysis of tropical tropospheric ozone, carbon monoxide and water vapor during the 2006 El Niņo using TES observations and the GEOS-Chem model
• Diurnal variations in tropospheric NO2 over the Middle East observed from space with SCIAMACHY and OMI
• Chemical nonlinearities in relating intercontinental ozone pollution to anthropogenic emissions

2009

• Sources and deposition of reactive gaseous mercury in the marine atmosphere
• Aqueous-phase reactive uptake of dicarbonyls as a source of organic aerosol over eastern North America
• Effects of climate change on wildfire and air quality
• North American influence on tropospheric ozone and the effects of recent emission reductions
• Model analysis of the factors regulating the trends and variability of carbon monoxide between 1988 and 1997
• Sensitivity of U.S. air quality to mid-latitude cyclone frequency and implications of 1980-2006 climate change
• Transpacific transport of ozone pollution and the effect of recent Asian emission increases on air quality in North America: an integrated analysis using satellite, aircraft, ozonesonde, and surface observations
• New constraints on terrestrial and oceanic sources of atmospheric methanol
• Contribution of stratospheric ozone to the interannual variability of tropospheric ozone
• Effects of global change on tropospheric ozone and U.S. background ozone
• The global budget of ethane and regional constraints on U.S. sources

2008

• Atmospheric constraints on seasonal fluxes of carbonyl sulfide
• Global budgets of atmospheric glyoxal and methylglyoxal, and implications for formation of secondary organic aerosols
• Improved algorithm for retrieving aerosol optical depths from MODIS satellite data
• Seasonal and spatial patterns of U.S. mercury deposition
• Sensitivity of sulfate direct climate forcing to the hysteresis of particle phase transitions
• Global distribution of solid and aqueous sulfate aerosols: effect of the hysteresis of particle phase transitions
• Biogenic versus anthropogenic sources of CO in the United States
• Effects of the 2006 El Nino on tropospheric composition as revealed by data from the Tropospheric Emission Spectrometer (TES)
• Present-Day and Preindustrial Cycles in a Global 3D Land-Ocean-Atmosphere Model for Mercury
• Spatial distribution of isoprene emissions from North America derived from HCHO column measurements by the OMI satellite sensor
• Effects of global change on U.S. ozone air quality
• Validation of TES Ozone using Ozonesonde Measurements

2007

• Validation of OMI tropospheric NO₂ observations during INTEX-B and application to constrain NO_x emissions over the eastern United States and Mexico
• Observing the diurnal evolution of NO_x-chemistry and emissions from space
• Comparison of adjoint and analytical Bayesian inversion methods for constraining Asian sources of carbon monoxide using satellite (MOPITT) measurements of CO columns
• A Quantitative Assessment of Uncertainties Affecting Estimates of Global Mean OH Derived from Methyl Chloroform Observations
• Fire and biofuel contributions to annual mean aerosol mass concentrations in the United States
• Traffic Restrictions Associated with the Sino-African Summit: Reductions of NO_x Detected from Space
• The importance of injection heights of biomass burning emissions in boreal forest regions
• Atmospheric acetylene and its relationship with CO as an indicator of air mass age
• Seasonal variability of NO_x emissions over east China constrained by satellite observations: Implications for combustion and microbial sources
• Space-based formaldehyde measurements as constraints on volatile organic compound emissions in east and south Asia, and implications for ozone
• Surface and lightning sources of nitrogen oxides over the United States: magnitudes, chemical evolution, and outflow

2006

• Consistency of time series and trends of stratospheric ozone as seen by ozonesonde and satellite measurements
• The Impact of Transpacific Transport of Mineral Dust in the United States
• Concentrations and sources of organic carbon aerosols in the free troposphere over North America
• Global lifetime of elemental mercury against oxidation by atomic bromine in the free troposphere
• Chemical cycling and deposition of atmospheric mercury: Global constraints from observations
• Continental outflow of ozone pollution as determined by O3-CO correlations from the TES satellite instrument
• Why are there large differences between models in global budgets of tropospheric ozone?
• Inventory of boreal fire emissions for North America in 2004: The importance of peat burning and pyro-convective injection
• Regional visibility statistics in the United States: Natural and transboundary pollution influences, and implications for the Regional Haze Rule

2005

• Formaldehyde distribution over North America: Implications for satellite retrievals of formaldehyde columns and isoprene emission
• Transpacific transport of Asian anthropogenic aerosols and its impact on surface air quality in the United States
• Exploiting CO₂:CO correlations in inversion analyses improve estimates of CO₂ surface fluxes
• First direct retrievals of tropospheric ozone columns from the GOME satellite instrument
• A large organic aerosol source in the free troposphere missing from current models
• Impact of new laboratory studies of N2O5 hydrolysis on global model budgets of tropospheric NOx and OH
• Constraints on seasonal and interannual variability of North American isoprene emissions from satellite observations of CH2O column
• Quantifying the marine isoprene source using MODIS chlorophyll observations
• The impact of reduced carbon oxidation on the atmospheric CO2 Distribution: Implications for inverse analyses
• Sulfate formation in sea-salt aerosols: constraints from oxygen isotopes
• Export efficiency of black carbon aerosol in continental outflow: global implications

2004

• Effects of future climate change on regional air pollution episodes in the United States
• Asian emissions of CO and NOx: constraints from aircraft and Chinese station data
• Comparative inverse analysis of satellite (MOPITT) and aircraft (TRACE-P) observations to estimate Asian sources of carbon monoxide
• A nested grid formation for chemical transport over Asia: applications to CO
• Global budget of atmospheric methanol
• Ozone maximum in the upper troposphere across the southern United States
• Ozone production in transpacific Asian pollution plumes and implications for ozone air quality in California
• Constraints on Regional Carbon Fluxes from CO2:CO correlations in Asian Outflow
• Constraints on Asian and European CH4 sources from CH4-C2H6-CO correlations in Asian outflow
• Transboundary pollution influences on aerosol concentrations in the United States
• Constraints on the sources of tropospheric ozone from ²¹⁰Pb-⁷Be-O₃ correlations
• Variability in surface ozone background over the United States: Implications for air quality policy

2003

• Potential of observations from the Tropospheric Emission Spectrometer (TES) to constrain continental sources of CO
• Climate response to the increase in tropospheric ozone since preindustrial times
• Variations in HCHO During the Growing Season over North America
• MOPITT Observations of CO during TRACE-P
• Anthropogenic halocarbon emissions from Asia
• Inventory of NOx emissions constrained w/ satellite observations
• Chinese anthropogenic emissions of CO are larger than expected
• Application of empirical orthogonal functions to evaluate ozone
• Sources of carbonaceous aerosols over the US
• Interannual variability of Asian combustion outflow pathways
• Biomass burning emission inventory with daily resolution
• Global 3-D Model Evaluation of Atmospheric Budgets of HCN and CH3CN

2002

• Analysis of 1970-1995 tropospheric ozone trends
• Impact of Arctic boundary layer BrOx chemistry on NOx concentrations
• An assessment of biofuel use in the developing world
• Particulate Matter Controls Could Increase Surface Ozone
• Increases in Global O3 Could Thwart U.S. Efforts to Abate O3 Pollution
• Biomass Burning Emissions Constrained by Satellite Observations
• Detectability of net carbon uptake by North America
• Quasibiennial oscillation in tropical ozone as revealed by ozonesonde data
• Sources and Chemistry of Nitrogen Oxides over the Pacific
• Stratospheric Versus Pollution Influences on Ozone at Bermuda
• North American Isoprene Emissions Measured from Space
• Monsoonal injection of Asian pollution to the upper troposphere

2001

• Global Model Analysis of TOMS and In-situ Observations of TTO
• Transatlantic transport of pollution and the NAO
• Satellite observations of tropospheric NO2 during TRACE-P
• El Nino effect on tropospheric ozone
• Oceanic distribution of methyl iodide
• An improved retrieval of tropospheric NO2 from GOME
• Background ozone in surface air over the U.S.
• U.S. pollution influence on surface ozone at Bermuda in spring
• Atmospheric budget of acetone
• Tropospheric ozone maximum over the Middle East
• CO time series for 1990-1997
• Biomass burning pollution over the South Pacific

2000

• HOx radical chemistry in the upper troposphere
• Sources of pollution over the Pacific
• Violations of the ozone air quality standard in the U.S.
• Export of Asian pollution to the Pacific
• Formaldehyde columns measured from satellite

 MOVIES

Here are some movies of GEOS-Chem simulations and EPA-AIRS ozone data that we put together for research or educational purposes over the years. The GEOS-Chem simulations are of old vintage but are just fine for educational purposes. Some of them are very nice to illustrate regional/seasonal sources and long-range transport in the atmosphere.

Animations from the GEOS-CHEM Model:

• July 2005 O3 done with GEOS-Chem at 1° x 1.25° resolution (cf Lok Lamsal, Dalhousie U.)
• Planning movies for ARCTAS
• Planning Movies for INTEX-NA and ITCT 2k4
• Daily movies of CO columns for SCIAMACHY model validation
• Make plots and anima tions from IAPS/ITCT 2k2 forecast products
• Make your own GEOS-CHEM plots and animations!
• Global Aerosol Annual 2005 (Aaron van Donkelaar, Dalhousie University)
• Global Aerosol January 2005 (Aaron van Donkelaar, Dalhousie University)
• Global Aerosol July 2005 (Aaron van Donkelaar, Dalhousie University)
• Sulfate during INTEX-B (Aaron van Donkelaar, Dalhousie University)
• Ozone at 900 hPa in July 2002 (Aaron van Donkelaar, Dalhousie University)
• TRACE-P planning movies: CO concentrations (Feb-Apr 1994)
• NARE movies: Outflows of CO, NO_x, PAN from North America and Europe (Feb-Apr 1994)
• 1994 Global Map --- Carbon Monoxide at 900hPa
• 1994 Global Map --- Ozone at 900hPa
• 1994 Global Map --- Ozone at 500hPa
• 1994 Global Map --- NOx at 200hPa
• 1994 Africa --- Carbon Monoxide
• 1994 East Asia --- Carbon Monoxide
• 1994 Western Hemisphere --- Carbon Monoxide
• 1994 Monthly Mean HCN Columns
• July 1994 Global Formaldehyde Total Columns
• Summer 1995 surface afternoon ozone over the U.S.

Animations from EPA-AIRS data:

• Summer 1995 surface afternoon ozone over the U.S.
• Surface Ozone Movies

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