Hemispheric Transport of Air Pollution Phase 2 Experiments:

GFDL AM3 Global Model Simulations

WARNING: this is experimental research data intended for specific
collaborative research projects. NOAA does not endorse its use for any
purpose whatsoever. If you are NOT involved in collaborative research
with the HTAP research group at GFDL and intend to use this data for
any purpose, you are doing so without authorization and at your own risk.
We reserve the right to retract or modify the data following the science
as it evolves, without notice or warning.

#Contact:

Meiyun Lin (Princeton University & NOAA GFDL)

Email: Meiyun.Lin@noaa.gov

Tel: 1-609-452-6551

***Please notice Meiyun if you use these data in any publications or presentations

# Full Model Description File

AM3 HTAP2 MODEL DESCRIPTION

#Time Periods:

2008 and 2010 (All experiments are initialized on January 1, 2007)

# Horizontal & Vertical Resolution

1.0 (lat) x 1.25 (lon) degrees

48 vertical levels

Please see the model description file for further information.

# Data format

Three hourly instantaneous, 3-D fields

netCDF

# List of variables and the corresponding files

Variable name	Long name	Unit^*	File name
O3	Ozone	vmr	atmos_instant.year010100-year123123.O3.nc
CO	Carbon Monoxide	vmr	atmos_instant.year010100-year123123.CO.nc
PAN	PAN	vmr	atmos_instant.year010100-year123123.PAN.nc
SO2	Sulfur dioxide	vmr	atmos_instant.year010100-year123123.SO2.nc
NO2	NO2	vmr	atmos_instant.year010100-year123123.NO2.nc
NO	NO	vmr	atmos_instant.year010100-year123123.NO.nc
NH3	Ammonia	vmr	atmos_instant.year010100-year123123.NH3.nc
NOy	NOy	vmr	atmos_instant.year010100-year123123.NOy.nc
HNO3	HNO3	vmr	atmos_instant.year010100-year123123.HNO3.nc
C2H6	ethane	vmr	atmos_instant.year010100-year123123.C2H6.nc
C3H8	Propane	vmr	atmos_instant.year010100-year123123.C3H8.nc
CH3COCH3	Acetone	vmr	atmos_instant.year010100-year123123.CH3COCH3.nc
bcphob	Hydrophobic black carbon	mmr	atmos_instant.year010100-year123123.bcphob.nc
bcphil	Hydrophilic black carbon	mmr	atmos_instant.year010100-year123123.bcphil.nc
omphob	Hydrophobic organic carbon	mmr	atmos_instant.year010100-year123123.omphob.nc
omphil	Hydrophilic organic carbon	mmr	atmos_instant.year010100-year123123.omphil.nc
sm_dust	Small dust	kg/m3	atmos_instant.year010100-year123123.sm_dust.nc
lg_dust	Large dust	kg/m3	atmos_instant.year010100-year123123.lg_dust.nc
SO4	Sulfate Aerosol	vmr	atmos_instant.year010100-year123123.SO4.nc
NH4NO3^+	Nitrate Aerosol	vmr	atmos_instant.year010100-year123123.NH4NO3.nc
NH4^+	Ammonium	vmr	atmos_instant.year010100-year123123.NH4.nc
PM2.5	Total PM2.5 mass	kg/m3	atmos_instant.year010100-year123123.PM2.5.nc
temp	Air temperature	K	atmos_instant.year010100-year123123.temp.nc
sphum	Specific humidity	kg/kg	atmos_instant.year010100-year123123.sphum.nc
ps	Surface Pressure	Pa	atmos_instant.year010100-year123123.ps.nc
pk	Pressure part of the hybrid coordinate	Pa	atmos_instant.static.nc
bk	Vertical coordinate sigma value		atmos_instant.static.nc

* vmr = volume mixing ratio; mmr = mass mixing ratio

+ NH4NO3 and NH4 should be lumped to represent total ammonium aerosol.

#List of AM3 HTAP2 Experiments

BASE	Base emissions, methane=1798 ppb	get data
CH4INC	Base emissions, methane=2121 ppb	get data
GLOALL	20% decrease of all anthropogenic emissions globally	get data
NAMALL	20% decrease of all anthropogenic emissions	get data
EASALL	20% decrease of all anthropogenic emissions	get data
EURALL	20% decrease of all anthropogenic emissions in HTAP2 Tier1 domain for Europe	get data

*Methane in GLOALL, NAMALL, EASALL, EURALL are as in BASE.

# Link to HTAP2 Experiment Specifications

www.htap.org

#Citations to Further Model Documentation

Lin M. Y. , L.W. Horowitz, S. J. Oltmans, A. M. Fiore, Songmiao Fan: Tropospheric ozone trends at Manna Loa Observatory tied to decadal climate variability , Nature Geoscience, 7, 136–143 (2014a) | d oi:10.1038/ngeo2066

Lin, M.Y. et al. Transport of Asian ozone pollution into surface air over the western United States in spring. J. Geophys. Res., 117, D00V07 (2012)

Donner, L. J. et al. The Dynamical Core, Physical Parameterizations, and Basic Simulation Characteristics of the Atmospheric Component AM3 of the GFDL Global Coupled Model CM3 . Journal of Climate 24, 3484-3519 (2011)

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