Presentations and Posters

Monday, May 1: Model Overview | Working Groups | Chemistry | Carbon Gases | Model Clinics | Posters
Tuesday, May 2: Aerosols | Aerosol Microphysics | Transport | Sources & Sinks | Model Clinics | Posters
Wednesday, May 3: Chem-Ecosys-Clim | Air Quality Implications | Air Quality Science | Model Clinics | Posters
Thursday, May 4: Future Directions

Monday, May 1

Model Overview (Daniel Jacob, Harvard, Chair)

• Welcome and GEOS-Chem overview (Daniel Jacob, Harvard and Randall Martin, Dalhousie)
• High-performance GEOS-Chem (GCHP) and flexible chemistry (FlexChem) (Michael Long, Harvard)
• The GEOS-Chem adjoint model (Daven Henze, CU-Boulder)
• GEOS-Chem Support Team activities (Bob Yantosca, Harvard)
• Update on GMAO Forward Processing System (Andrea Molod, NASA GSFC – GMAO)
• Towards chemical forecasting with the GMAO's GEOS models (Steven Pawson, NASA GSFC – GMAO)
• The GEOS-5 nature run with tropospheric chemistry (Christoph Keller, NASA GSFC – GMAO)

GEOS-Chem Working Groups (Amos Tai, CUHK, Chair)

• Transport Working Group (Hongyu Liu, NIA/NASA Langley and Andrea Molod, NASA GSFC – GMAO)
• Chemistry and Organics Working Group (Mat Evans, U. York; Barron Henderson, US EPA; Emily Fischer, CSU; Dylan Millet, U. Minnesota)
• Aerosols Working Group (Colette Heald, MIT and Jeff Pierce, CSU)
• Sources and surface sinks Working Group (Jintai Lin, PKU and Qiang Zhang, Tsinghua)
• Chemistry-Climate Working Group (Shiliang Wu, Michigan Tech)
• Carbon Cycle and Data Assimilation Working Group (Kevin Bowman, JPL and Dylan Jones, U. Toronto)
• Nested Model Working Group (Yuxuan Wang, U. Houston; Jun Wang, U. Iowa; Lin Zhang, PKU)
• Mercury and POPs Working Group (Jenny Fisher, U. Wollongong and Chris Holmes, FSU)

Chemistry (Barron Henderson, US EPA, Chair)

• KEYNOTE: GEOS-Chem implementation of the Caltech isoprene mechanism (Paul Wennberg, Caltech)
• Updated isoprene chemistry in GEOS-Chem: mechanisms and impacts (Kelvin Bates, Caltech)
• Rights and wrongs with the GEOS-Chem PAN Simulation (Emily Fischer, CSU)
• Alkyl nitrate impacts on the NOx budget: insights from aircraft observations and GEOS-Chem (Jenny Fisher, U. Wollongong)
• Wintertime emissions and chemistry over the NE US: Role of oxidants and heterogeneous chemistry (Lyatt Jaegle, U. Washington)
• Halogen chemistry in GEOS-Chem (Mat Evans, U. York)
• Using OMI cloud-sliced NO2 and GEOS-Chem to better understand dynamics of upper troposphere NOx (Eloise Marais, U. Birmingham)
• The reactive organic carbon budget (Sarah Safieddine, MIT)
• Global budget of tropospheric ozone: long term trend and recent model advances (Lu Hu, U. Montana)

Carbon Gases (Emily Fischer, CSU, Chair)

• Response of the carbon cycle to climate variability (Kevin Bowman, JPL)
• Using GEOS-Chem to characterize the effect of transport uncertainty in atmospheric flux inversions of OCO-2 column averaged CO2 (Andrew Schuh, CSU)
• Incorporating GEOS-Chem in CarbonTracker: model developments, transport comparison to TM5, and tracer conservation (Andy Jacobson, NOAA/ESRL)
• Characterizing the information that space-based observations provide on the spatial distribution of atmospheric CO2 (Dylan Jones, U. Toronto)
• Coupled stratosphere-troposphere chemistry raises the methane global warming potential (Chris Holmes, FSU)
• A sensitivity analysis of key natural factors in the modeled global acetone budget (Jared Brewer, CSU)
• Efficient tuning of transport and prior error statistics in high-dimensional source inversions using the adjoint of GEOS-Chem (Nicolas Bousserez, CU – Boulder)

GEOS-Chem Model Clinics

• GEOS-Chem for beginners (Melissa Sulprizio, Harvard)
• GEOS-Chem for advanced users (Bob Yantosca, Harvard)
• GEOS-Chem adjoint; handout (Daven Henze and Yanko Davila U. CU-Boulder)

Posters

• Cloud radiative effects on key tropospheric oxidants in GEOS-Chem (Hongyu Liu, NIA/NASA Langley)
• Formaldehyde (HCHO) column measurements from airborne instruments: Comparison with airborne in-situ measurements, model, and satellites (Hyeong-Ahn Kwon, Seoul National U.)
• Pinpointing inaccuracies in isoprene emission estimates (Jen Kaiser, Harvard)
• Formaldehyde yields used to derive isoprene emissions in Australia with OMI measurements (Jesse Greenslade, U. Wollongong)
• Modelled and observed HCHO columns over India (Luke Surl, U. Edinburgh)
• Constraining hydrocarbon emissions over the Indian subcontinent based on HCHO observations from OMI and GOME-2 (Sreleekha Chaliyakunnel, U. Minnesota)
• Adjoint inversion of Chinese non-methane volatile organic compounds sources using space-based observations of formaldehyde and glyoxal (Hansen Cao, Peking U.)
• Sources and fate of reactive carbon over North America: constraints from recent aircraft campaigns (Xin Chen, U. Minnesota)
• Impacts of updated aromatic and monoterpene chemistry (William Porter, MIT)
• Observing formaldehyde (HCHO) from space: trend analysis and public health implications (Lei Zhu, Harvard)
• A decadal (2004-2014) analysis of global-to-regional tropospheric ozone column trends using OMI observations and GFDL-AM3 model simulations (Guanyu Huang, Harvard-Smithsonian CFA)
• How to explain the bias associated with the NOy distribution in the upper troposphere in global chemical transport models? (Alicia Gressent, MIT)
• Reconciling upper tropospheric NO2 measurements for the interpretation of satellite observations (Rachel Silvern, Harvard)
• Summary of RS-HDMR sensitivity analyses of modeled ozone and hydrogen oxides for six NASA field campaigns (Ken Christian, Penn State)
• Infer surface fluxes of bromoform and dibromomethane from aircraft and in-situ observations using tagged VSLS simulations (Liang Feng, U. Edinburgh)
• Assimilating satellite observed CO2 using GEOS-Chem (Feng Deng, U. Toronto)
• Arctic CO2 in a changing climate: constraints on fluxes and transport from in situ measurements, modeling, and remote sensing (Kelly Graham, FSU)
• Evaluation of GEOS-Chem-simulated biospheric carbon dioxide fluxes and atmospheric concentrations using observations (Sajeev Philip, NASA-Ames)
• GEOS-Chem simulations of greenhouse gas measurements (CO2, CH4 and CO) from moving platforms in and around Australia (Beata Bukosa, U. Wollongong)
• Diagnosing GEOS-Chem model biases using GOSAT CH4 retrievals and Weak Constraint 4D-Var Data Assimilation (WC 4D-Var) (Ilya Stanevich, U. Toronto)
• Understanding the sources and sinks of atmospheric methane (Alex Turner, Harvard)
• Methane trends in North America observed by GOSAT: contributions from different source types (Jianxiong Sheng, Harvard)
• Improving understanding of U.S. methane emissions using a new gridded inventory (Joannes Maasakkers, Harvard)
• Spatial attribution of decadal changes in methane and ozone radiative forcing constrained by satellite observations (Thomas Walker, JPL/Caltech)
• Optimization of CO assimilation using weak constraint (Tailong He, U. Toronto)
• Development of a tropospheric chemistry data assimilation system: GEOS-Chem-EnKF (Kayuzuki Miyazaki, JAMSTEC/JPL)
• GEOS-Chem on cloud computing platforms (Jiawei Zhuang, Harvard)
• On the development of the UCX GEOS-Chem adjoint (Irene Dedoussi, MIT)

Tuesday, May 2

Aerosols (Becky Alexander, U. Washington, Chair)

• KEYNOTE: Recent aerosol field and lab results and implications for modeling (Jose Jimenez, CU – Boulder)
• Insight into the global distribution and chemical composition of PM2.5 from the SPARTAN Global Aerosol Network (Crystal Weagle, Dalhousie)
• Effect of seasalt nitrate photolysis on global NOx, O3, and OH (Prasad Kasibhatla, Duke)
• Distribution and sources of submicron aerosols during the WINTER 2015 aircraft campaign (Viral Shah, U. Washington)
• Trends in chemical composition of global and regional population-weighted fine particulate matter over the recent 25 years (Chi Li, Dalhousie)
• Impacts of sulfur oxidation by reactive halogen on both sulfur and reactive halogen budgets (Qianjie Chen, U. Washington)
• Inconsistency of ammonium-sulfate aerosol ratios with thermodynamic models in the eastern US: a possible role of organic aerosol (Rachel Silvern, Harvard)

Aerosol Microphysics and Radiative Forcing (Jeff Pierce, CSU, Chair)

• Applying observations of the OMI Ultraviolet Aerosol Index to understand trends in aerosol absorption (Melanie Hammer, Dalhousie)
• The impact of aerosol size distribution representation on aerosol optical properties and radiative effects (David Ridley, MIT)
• Why the aerosol indirect forcing using the mass-only aerosol representation in GEOS-Chem may never look quite right (Jack Kodros, CSU)
• Implementation of new nucleation schemes in GEOS-Chem and results (Fangqun Yu, SUNY-Albany)
• The impact of size-resolved aerosol microphysics on heterogeneous chemistry: uncertainties associated with aerosol size and composition (Gan Luo, SUNY-Albany)

Transport, Sources and Sinks (Hongyu Liu, NIA/NASA Langley, Chair)

• Impact of higher resolution GMAO Forward Processing fields on short-lived tropospheric tracers (Clara Orbe, NASA GSFC – GMAO)
• Limits on GEOS-Chem's ability to represent intercontinental transport (Seb Eastham, Harvard)
• How representative are airborne field campaigns of reactive tropospheric composition? (Lee Murray, U. Rochester)
• Constraints from airborne 210Pb observations on aerosol scavenging and lifetime in GEOS-Chem (Bo Zhang, NIA/NASA Langley)
• Top-down estimate of aerosol emissions from MODIS and OMI (Jun Wang, U. Iowa)
• Two-way ecosystem-atmosphere exchange of VOCs: New observational constraints from PROPHET-AMOS (Dylan Millet, U. Minnesota)
• Assessing the contributions of open ocean and sea ice sources of sea salt aerosol over polar regions with GEOS-Chem (Jiayue Huang, U. Washington)

Sources and Sinks (Hongyu Liu, NIA/NASA Langley, Chair)

• Top-down constraints on global N2O emissions at optimal resolution (Kelley Wells, U. Minnesota)
• Adjoint analyses of PM pollution over North China (Lin Zhang, Peking U.)
• Comparing mass balance and adjoint methods for inverse modeling of nitrogen dioxide columns for global nitrogen oxide emissions (Matt Cooper, Dalhousie)
• Global deposition of reactive nitrogen oxides from 1996 to 2014 constrained with satellite observations of NO2 columns (Jeffrey Geddes, Boston U.)
• Decadal-scale top-down NOx and SO2 emissions from a hybrid 4D-Var / mass balance joint inversion (Zhen Qu, CU – Boulder)
• Global CO and NOx emission estimates using multiple species data assimilation with GEOS-Chem adjoint model (Xuesong Zhang, U. Toronto)
• Responses of surface ozone air quality to anthropogenic nitrogen deposition (Yuanhong Zhao, Peking U.)

Model Clinics

• High-performance GEOS-Chem (GCHP) (Mike Long, Seb Eastham, Jiawei Zhuang, and Lizzie Lundgren, Harvard)

Posters

• Characterizing the Asian Tropopause Aerosol Layer (ATAL) using satellite observations, balloon measurements and a chemical transport model (Duncan Fairlie, NASA Langley)
• Aerosol Types from Chemistry (CATCh): A new algorithm linking remote sensing and chemistry (Nicholas Meskhidze, North Carolina State)
• Interpreting measurements of aerosol extinction and mass in North America (Robyn Latimer, Dalhousie)
• Estimating ground PM2.5 speciation concentrations using MISR retrieved aerosol properties and GEOS-Chem aerosol vertical profiles (Xia Meng, Emory)
• Constraints from reflected solar and infrared spectral measurements on size-dependent dust emissions: An OSSE using FIM-Chem and GEOS-Chem (Xiaoguang Xu and Jun Wang, U. Iowa)
• 4DVAR Assimilation of CALIOP Level 2 aerosol profiles with the adjoint of GEOS-Chem (Colin Lee, Dalhousie)
• Long-range transport of black carbon to the Arctic: Tagged tracer simulation using GEOS-Chem (Kohei Ikeda, NEIS)
• Using ISORROPIA II to predict heterogeneous chlorine chemistry (Jessica Haskins, U. Washington)
• Processes controlling aerosol formation and growth in the summertime Arctic (Betty Croft, Dalhousie)
• The role of MSA in particle growth and the aerosol direct and indirect effects (Anna Hodshire, CSU)
• Use GEOS-Chem output for WRF-Chem initial and boundary conditions: Impact of long-range transported dust on ice nucleation and precipitation (Yanda Zhang, SUNY-Albany)
• Factors affecting anthropogenic aerosol radiative forcing (Jingxu Wang, Peking U.)
• Modeling the optical properties and radiative effect of brown carbon (Xuan Wang, MIT)
• Errors in using archived meteorological data for chemical transport modeling (Karen Yu, Harvard)
• An Eulerian vs. Lagrangian comparison of modeled carbon monoxide in Texas during biomass burning events (Christopher Brodowski, AER)
• Complement to GEOS-Chem: Lagrangian Transport model FLEXPART reconfigured for GEOS-FP meteorological fields (Kelley Larson, U Washington)
• Impacts of precipitation patterns on the wet deposition and lifetime of aerosols (Pei Hou, Michigan Tech)
• A new approach for monthly updates of anthropogenic sulfur dioxide emissions from space: Application to China and implications for air quality forecasts (Yi Wang, U. Iowa)
• Evaluating modeled ammonia in California and the South East US with satellite data (Chantelle Lonsdale, AER)
• Ammonia emissions from agriculture over China (Youfan Chen, Peking U.)
• Comparison of GEOS-Chem simulated ammonia concentrations with observations (Arshad Nair, SUNY-Albany)
• Implications of subgrid dry deposition of NO2 in a global chemical transport model (Brian Boys, Dalhousie)
• Incorporating updated emissions of NEI 2011 v6.3 into GEOS-Chem (Zitely Tzompa, CSU)
• Incorporating flexible source tracking into GEOS-Chem (Carmen Lamancusa, U. Connecticut)
• Neural network prediction of agricultural burning in Southern China and its application to air quality forecasts (Tzung-May Fu. Peking U.)
• NAFED: a ground-based North American Fire Emission Database for 1980-2014 (Xu Yue, IAP)
• Comparison of wildfire emissions in GEOS-Chem to ground-based FTIR measurements (Erik Lutsch, U. Toronto)
• Development and evaluation of biomass burning vertical injection height scheme in GEOS-Chem (Juliet Zhu, CSU)

Wednesday, May 3

Chemistry-ecosystems-climate (Colette Heald, MIT, Chair)

• KEYNOTE: Atmospheric composition in the Community Earth System Model (CESM) (Jean- Francois Lamarque, NCAR)
• Ozone-CO2-Vegetation coupling in GEOS-Chem: Implications for air quality under climate and land use change (Amos Tai, CUHK)
• Constraining global dry deposition of ozone: Observations and modeling (Sam Silva, MIT)
• Adverse effects of drought on air quality (Yuxuan Wang, U. Houston)
• Integrating air quality with afforestation and reforestation efforts (Shiliang Wu, Michigan Tech)
• Effects of climate change on transpacific ozone using IGSM-CAM/GEOS-Chem framework (Mingwei Li, MIT)
• Influence of 2000-2050 climate change on U.S. particulate matter: Results from statistical models vs. chemistry-climate models (Lu Shen, Harvard)

Air Quality and Implications (Jenny Fisher, U. Wollongong, Chair)

• Estimating human health impacts from GEOS-Chem (Irene Dedoussi, MIT)
• Globalizing air pollution, climate forcing, and health impacts (Jintai Lin, Peking U.)
• ransboundary health impacts of transported global air pollution and international trade (Qiang Zhang, Tsinghua)
• Exploring the impacts of particulate matter and surface ozone on global crop production (Luke Schiferl, MIT)
• Influence of air pollutant emission controls on the “climate penalty” in the United States (Tao Feng, MIT)
• Mercury co-benefits of climate policy in China (Katie Mulvaney, MIT)

Air Quality Science (Lin Zhang, PKU, Chair)

• Air pollution over West Africa (Eleanor Morris, U. York)
• Preliminary results of the KORUS-AQ campaign (Rokjin Park, Seoul National U.)
• Using in situ data to better understand Chinese air pollution events (Jonathan Moch, Harvard)
• Chemical composition of ambient PM2.5 over China and relationships to precursor emissions during 2005–2012 (Guannan Geng, Emory)
• Foreign and domestic contributions to springtime ozone pollution over China (Ruijing Ni, Peking U.)
• Evaluating a space-based indicator of surface ozone-NOx-VOC sensitivity over mid-latitude source regions and application to decadal trends (Xiaomeng Jin, Columbia)
• Meteorological drivers of surface ozone biases in the Southeast US (Katie Travis, Harvard)

Model Clinics

• GEOS-Chem as a module for Earth System Models (Mike Long and Seb Eastham, Harvard)

Posters

• Weather conditions conducive to Beijing severe haze more frequent under climate change (Ke Li, IAP)
• Effectiveness of maize-soybean intercropping on securing food production and air quality in China (Ka Ming Fung and Amos Tai, CUHK)
• Influence of the West Pacific subtropical high on surface ozone day to day variability in summertime over Eastern China (Zijian Zhao, Tsinghua)
• Impacts of changes in climate and vegetation on wildfire emissions (Aditya Kumar, Michigan Tech)
• The impact of historical land use change from 1850 to 2000 on particulate matter and ozone (Colette Heald, MIT)
• Chemical and structural uncertainties within CESM CAM-Chem and GEOS-Chem: Ozone, PM2.5, and human health (Benjamin Brown-Steiner, MIT)
• Multi-decadal trends in aerosol radiative forcing over the Arctic: Contribution of changes in anthropogenic aerosol to Arctic warming since 1980 (Loretta Mickley, Harvard)
• What controls the
• Adjoint analysis of the climate and human health impacts of transient shifts in anthropogenic activity in China (Forrest Lacey, CU - Boulder)
• Public health impacts of the severe haze in Equatorial Asia in September-October 2015: Demonstration of a new framework for informing fire management strategies to reduce downwind smoke exposure (Loretta Mickley, Harvard)
• Contributions of natural variability to uncertainty in the efficacy of health and environmental policy (Daniel Rothenberg, MIT)
• Health impacts of excess NOx emissions in Europe (Guillaume Chossiere, MIT)
• Air quality and health co-benefit in global coal-fired power sector (Dan Tong, Tsinghua)
• Implications of climate variability and change for the effectiveness of mercury policy (Amanda Giang, MIT)
• A new mechanism for atmospheric mercury redox chemistry: Implications for the global mercury budget (Hannah Horowitz, Harvard)
• Quantifying sources and pathways of mercury deposition and exposure in Northern Maine, USA using integrated modeling (Helene Angot, MIT)
• Using GEOS-Chem Hg simulations to help diagnose and predict fisheries health and sustainability (Colin Thackray, Harvard)
• Updated terrestrial mercury simulation in GEOS-Chem (Rebecca Stern, Harvard)
• Modeling PAHs over the UK and Europe (Peter Ivatt, U. York)
• Using GEOS-Chem in the imputation of missing ground PM2.5 estimates due to cloud cover (Jessica Belle, Emory)
• Evaluation and intercomparison of air quality forecasts over Korea during the KORUS-AQ campaign (Seungun Lee, Seoul National U.)
• Influence of agricultural fires on urban air pollution in Delhi, India (Dan Cusworth, Harvard)
• Secondary organic aerosol in the Beijing urban area (Matthew Jolleys, U. Edinburgh)
• Simulation of severe winter haze in China over 1980-2014 (Ruijun Dang, IAP)
• Comparison between the simulations of fine particulate matter during APEC period using WRF-CHEM and GEOS-Chem (Mi Zhou, Peking U.)
• The formation mechanisms of PM2.5 by quantifying the formation pathways of sulfate in China (Jingyuan Shao, U. Washington)
• Modelling UK and European air quality with GEOS-Chem (Tim Garstin, U York)
• GEOS-Chem boundary conditions for WRF-chem (Chenghao Tan, U. Iowa)
• Impacts of Central American fires on ozone air quality in Texas (Sing-Chun Wang, U. Houston)

Thursday, May 4

Future Directions (Randall Martin, Dalhousie, Chair)

• Future directions for GEOS-Chem software engineering (Seb Eastham, Mike Long, Bob Yantosca, Harvard, discussion leads)
• Future directions for the GEOS-Chem adjoint (Daven Henze, CU-Boulder and Jun Wang, U. Iowa, discussion leads)
• Poster introduction awards (Mat Evans, U. York)
• Review of GEOS-Chem development priorities defined by Working Groups, functioning of the GEOS-Chem community (Daniel Jacob, Harvard and Randall Martin, Dalhousie, discussion leads)