Neighborhood Emission Mapping Operation.

The Neighborhood Emission Mapping Operation (NEMO) is a high-resolution (1km) dataset of air pollutant emissions from human activities over the Contiguous United States (CONUS). NEMO includes air pollutants such as volatile organic compounds (VOCs), nitrogen oxides (NOx), carbon monoxide (CO), sulfur dioxide (SO2), ammonia (NH3), and particulate matters (PM, both PM2.5 and PM10). It is produced by the air quality research team at George Mason University based on the National Emission Inventories from United States Environmental Protection Agency (US EPA).​

× NOTE! NEMO2019 is available.

Method

Methods

Model and Tool

Spatial Allocator v4.4 SMOKEv4.7​

Emission Inventory

US EPA National Emissions Inventory 2017

Anthropogenic source sectors

6 area sectors, 2 mobile sectors and 1 point source sector

Chemical Mechanisms

CB6r3 with AE7 aerosol mechanism​

Downloads

Downloads

NEMO are available in two formats: NetCDF and Shapefile. Both formats have the same emission sectors with 1 km resolution in the Lambert Conformal Conic (LCC) projection. The NetCDF format contains hourly, monthly, and annual data while the Shapefiles only include annual emissions. Additionally, the NetCDF provides the model species for CB6 mechanism in the hourly and monthly data files. The shapefiles include total emissions of VOCs, NOx, PM2.5, SO2, CO, and NH3.

  • The datafiles of monthly and annual nonpoint emissions that are available on figshare reservoir: https://doi.org/10.6084/m9.figshare.c.6141735.
    The annual emission for airports sector in .shp format is available here.
  • The annual nonpoint emissions (2017, 2019) in shapefile format are now available.
  • The hourly sectoral emissions at census level are available here.
  • If you want to download the hourly emission data, please contact us.

Dataset

HOW TO READ?

Air Pollutants

NOx, VOCs, CO, SO2, NH3, PM2.5 and PM10

PM2.5 and PM10 Composition​

Data Format

NetCDF, Shapefile (Annual only), ASCII (Census tract)

Inventory Base Year

2017, 2019

Emission Sources​ (Sectoral & Total)

Anthropogenic fugitive dust (afdust), Agriculture (ag)/Fertilizer&Livestock, Non-point (nonpt), Oil and Gas (np_oilgas), Solvents (np_solvents), Onroad, Nonroad, Rail, Residential wood combustion (rwc) & Airports

Temporal resolution

Annual, Monthly, and Hourly​

Spatial resolution

1 km × 1 km​

Particulate Matter

PM 2.5

PM 2.5

By Grid

PM 2.5

By Tract

PM 2.5

Exposure Proximity

Nitrogen Oxide

NOx

NOx

By Grid

NOx

By Tract

NOx

Exposure Proximity

Publications

Publications

Publications

Ma, S., Tong, D.Q. Neighborhood Emission Mapping Operation (NEMO): A 1-km anthropogenic emission dataset in the United States. Sci Data 9, 680 (2022). https://doi.org/10.1038/s41597-022-01790-9​

Published
09 November 2022

Subjects
Atmospheric chemistry, Sustainability

Author
Siqi Ma & Daniel Q. Tong

ACKNOWLEDGEMENT

Acknowledgement

Acknowledgement

This work is partially supported by NOAA Climate Program Office and NASA Health and Air Quality Program. We thank the US EPA for providing the base emissions inventories and ancillary files used in this study. The authors are grateful to Bok Haeng Baek, Dongmei Yang, and Charles Chang for insightful discussion and assistance with preparing the data/tools and the website.​

Contact

Contact Us

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