# High-Resolution Northeastern U.S. & Eastern Canada Air Quality Forecasts

The datasets hold air quality forecasts for up to 84 hours of the northeastern area of the U.S. and the eastern Canadian provinces of Ontario and Quebec. The area encompasses 3.6 million sq km (1,390,500 mi2) and covers the states of Connecticut, Delaware, Kentucky, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia, and the District of Columbia. In total, the outputs include data for 932 U.S. counties and more than 100 cities in the U.S. and Canada.

The numerical predictions use a combination of state-of-the-art HPC software to predict the emissions and dispersion of many species. Additionally, the inclusion of NRT satellite data allows the computations to capture the contribution of pollutants from wildfire emissions, which can greatly diminish air quality depending on meteorological conditions. The forecasts represent hourly averages for over 100 species plus AQIs for PM2.5, PM1, PM10, SO2, O3, CO and NO2. The outputs are in CSV formats so that they can be imported from any system running any OS and are sorted out by date. State data are then sorted out as either datum for each state county (e.g. PENNSYLVANIA) or for large urban areas (e.g. PENNSYLVANIA_CITIES).

In the bucket, subscribers can also find GIF files (at different resolutions) animating the dispersion of particulate matter (PM2.5) during the simulated period. Contact us (airquality@odyhpc.com) if you need the animation in SVG format or are interested in animations covering one week or a longer period.

In addition to the files available from the bucket, subscribers have access to the following extras upon request (airquality@odyhpc.com):

* Technical support to subscribers using the datasets

* Customized animations for up to 3 combinations of species and sections, which can be either counties, states or any region defined by the subscriber

* Meteorological data used to perform the air quality predictions

* Predictions for up to 5 locations specified by the subscriber

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*Output species*

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Symbol | Species | Units

----|-----|-----

PM2.5 | Particulate Matter (diameter 2.5 um and smaller) | ug/m3

AQI (PM2.5) | |

PM10 | Particulate Matter (diameter 10 um and smaller) | ug/m3

AQI (PM10.0) | |

PM1 | Particulate Matter (diameter 1 um and smaller) | ug/m3

AQI (PM1.0) | |

PM0.1 | Particulate Matter (diameter 0.1 um and smaller) | ug/m3

AQI (PM0.1) | |

O3 | Ozone | ppmV

AQI (O3) | |

CO | carbon monoxide | ppmV

AQI (CO) | |

NO2 | nitrogen dioxide | ppmV

AQI (NO2) | |

NO | nitrogen dioxide | ppmV

NO3 | nitrate radical | ppmV

O1D | ground-state oxygen atoms, O(1D) | ppmV

OH | hydroxyl radical | ppmV

HO2 | hydroperoxy radical | ppmV

H2O2 | hydrogen peroxide | ppmV

N2O5 | dinitrogen pentoxide | ppmV

HNO3 | nitric acid | ppmV

HONO | nitrous acid | ppmV

PNA | peroxynitric acid | ppmV

SULF |sulfuric acid | ppmV

SULRXN | sulfate aerosol precursor | ppmV

C2O3 | acetylpreoxide radical | ppmV

MEO2 | methylperoxy radical | ppmV

RO2 | total peroxy radical concentration | ppmV

PAN | peroxyacylnitrate | ppmV

PACD | peroxycarboxylic acids | ppmV

AACD | acetic acid | ppmV

CXO3 | acetylperoxy radicals with 3 or more carbons | ppmV

ALD2 | acetaldehyde | ppmV

XO2H | NO oxidation to NO2 with HO2 production from alkoxy radicals | ppmV

PANX | peroxyacylnitrates with 3 or more carbons | ppmV

FORM | formaldehyde | ppmV

MEPX | methylhydroperoxide | ppmV

MEOH | methanol | ppmV

ROOH | methylhydroperoxide | ppmV

XO2 | NO oxidation to NO2 via peroxy radical | ppmV

XO2N | nitrate production from NO reaction with peroxy radical | ppmV

XPAR | organic nitrate production from PAR | ppmV

XPRP | organic nitrate production from PRPA | ppmV

NTR1 | monofunctional organic nitrates | ppmV

NTR2 | multifunctional organic nitrates | ppmV

FACD | formic acid | ppmV

HCO3 | radical from HO2 reaction with formaldehyde | ppmV

ALDX | aldehydes with 3 or more carbons | ppmV

GLYD | glycoaldehyde | ppmV

GLY | glyoxal | ppmV

MGLY | methyl glyoxal | ppmV

ETHA | ethane | ppmV

ETOH | ethanol | ppmV

KET | carbon-ketone bond | ppmV

PAR | carbon-carbon single bond | ppmV

ACET | acetone | ppmV

PRPA | propane | ppmV

ROR | secondary alkoxy radical | ppmV

ETHY | acetylene | ppmV

ETH | ethene | ppmV

OLE | terminal alkene bond | ppmV

IOLE | internal alkene bond | ppmV

ISOP | isoprene | ppmV

ISO2 | isoprene peroxy radical | ppmV

ISOPRXN | counter species for aerosol from isoprene, volatility pathways | ppmV

ISPD | isoprene reaction products | ppmV

INTR | nitrate from isoprene | ppmV

ISPX | hydroperoxide from ISO2 reaction with HO2 | ppmV

HPLD | hydroperoxyaldehyde from ISO2 isomerization | ppmV

OPO3 | peroxyacyl radical from OPEN | ppmV

EPOX | isoprene epoxydiol | ppmV

IEPOXP | _ | ppmV

EPX2 | peroxy radical from EPOX=OH reaction | ppmV

TERP | monoterpenes | ppmV

APIN | alpha pinene | ppmV

TERPNRO2 | counter species for aerosol from TERP+NO3 | ppmV

MTNO3 TRPRXN | _ | ppmV

BENZENE | benzene | ppmV

CRES | cresol and higher molecular weight phenols | ppmV

BZO2 | peroxy radical from benzene reactions with OH | ppmV

OPEN | aromatic ring opening product | ppmV

BENZRO2 | counter species for aerosol from benzene+OH | ppmV

TOL | toluene and other monoalkyl aromatics | ppmV

TO2 | toluene peroxy radical | ppmV

TOLRO2 | counter species for aerosol from TOL+OH | ppmV

XOPN | product of aromatic ring-opening reaction | ppmV

XYLMN | xylene and other polyalkyl aromatics except naphtalene | ppmV

XLO2 | peroxy radical from XYLMN+OH reaction | ppmV

XYLRO2 | counter species for aerosol from XYLMN+OH | ppmV

NAPH | naphtalene | ppmV

PAHRO2 | counter species for aerosol from NPAH+OH | ppmV

CRO | alkoxy radical from cresol | ppmV

CAT1 | methyl catechols | ppmV

CRON | nitro-cresols | ppmV

OPAN | peroxyacylnitrate from OPO3 | ppmV

ECH4 | methane | ppmV

CL2 | molecular chlorine | ppmV

CL | atomic chlorine | ppmV

HOCL | hypochlorous acid | ppmV

CLO | chlorine monoxide | ppmV

FMCL | formylchloride | ppmV

HCL | hydrochloric acid | ppmV

CLNO2 | nitryl chloride | ppmV

CLNO3 | chlorine nitrate | ppmV

BUTADIENE13 | 1, 3-butadiene | ppmV

ACROLEIN | acrolein | ppmV

ACRO_PRIMARY | acrolein from emissions only | ppmV

TOLU | toluene | ppmV

HG | elemental mercury | ppmV

PM25_SO4 | Particulate Sulfate (diameter 2.5 um and smaller) | ug/m3

PM25_NO3 | Particulate Nitrate (diameter 2.5 um and smaller) | ug/m3

PM25_NH4 | Particulate Ammonium (diameter 2.5 um and smaller) | ug/m3

PM25_CL | Particulate Chloride (diameter 2.5 um and smaller) | ug/m3

PM25_NA | Particulate Sodium (diameter 2.5 um and smaller) | ug/m3

PM25_EC | Particulate Elemental Carbon (diameter 2.5 um and smaller) | ug/m3

PM25_OC | Particulate Organic Carbon (diameter 2.5 um and smaller) | ug/m3

PM25_OA | Particulate Organic Aerosols (diameter 2.5 um and smaller) | ug/m3

PM25_MG | Particulate Magnesium (diameter 2.5 um and smaller) | ug/m3

PM25_K | Particulate Potassium (diameter 2.5 um and smaller) | ug/m3

PM25_CA | Particulate Calcium (diameter 2.5 um and smaller) | ug/m3

PM25_OTHER | Other Particulate Matter (diameter 2.5 um and smaller) | ug/m3

PM25_FE | Particulate Iron (diameter 2.5 um and smaller) | ug/m3

PM25_SI | Particulate Silica (diameter 2.5 um and smaller) | ug/m3

PM25_TI | Particulate Titanium (diameter 2.5 um and smaller) | ug/m3

PM25_MN | Particulate Manganese (diameter 2.5 um and smaller) | ug/m3

PM25_AL | Particulate Aluminum (diameter 2.5 um and smaller) | ug/m3