TEMPO gridded NO2 (QA filtered) tropospheric and stratospheric columns V03

Page Summary

• This dataset provides quality-controlled Level 3 nitrogen dioxide data on a regular grid from TEMPO observations.

• It includes information on tropospheric, stratospheric, and total nitrogen dioxide vertical columns, along with ancillary data and quality flags.

• The data is filtered to remove points with high cloud cover, extreme solar zenith angles, and low data quality.

• The dataset is available from 2023-08-01 to 2025-09-16 and is in the public domain.

Dataset Availability

2023-08-01T00:00:00Z–2025-09-16T21:03:09Z

Dataset Producer

QA Filtered: Google and NASA ASDC

Earth Engine Snippet

ee.ImageCollection("NASA/TEMPO/NO2_L3_QA")

Tags

air-quality nasa nitrogen-dioxide pollution satellite-imagery tempo tropomi

Description

Nitrogen dioxide Level 3 files provide trace gas information on a regular grid covering the TEMPO field of regard for nominal TEMPO observations. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle. The rasters contain information on tropospheric, stratospheric and total nitrogen dioxide vertical columns, ancillary data used in air mass factor and stratospheric/tropospheric separation calculations, and retrieval quality flags. The re-gridding algorithm uses an area-weighted approach.

The QA Filtered TEMPO NO2 L3 dataset is a quality-controlled version of the original data. It is generated by removing data points with high cloud cover (>50%), extreme solar zenith angle (>80 degrees), and main data quality (flag > 0).

• A version of this dataset without QA filters applied is available as NASA/TEMPO/NO2_L3
• General Documentation

Bands

Bands

Pixel size: 2226 meters (all bands)

Name	Units	Pixel Size	Description
weight	km^2	2226 meters	Sum of Level 2 pixel overlap areas. Represents the weighting factor for each grid cell, indicating the fraction of the grid cell area with valid data.
vertical_column_troposphere	molecules/cm^2	2226 meters	NO2 troposphere vertical column
vertical_column_troposphere_uncertainty	molecules/cm^2	2226 meters	NO2 troposphere vertical column uncertainty
vertical_column_stratosphere	molecules/cm^2	2226 meters	NO2 stratosphere vertical column uncertainty
main_data_quality_flag	Dimensionless	2226 meters	Main data quality flag which is always 0, indicating good quality data.
num_vertical_column_troposphere_samples	Dimensionless	2226 meters	Number of Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column.
min_vertical_column_troposphere_sample	molecules/cm^2	2226 meters	Smallest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column.
max_vertical_column_troposphere_sample	molecules/cm^2	2226 meters	Largest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column.
num_vertical_column_troposphere_uncertainty_samples	Dimensionless	2226 meters	Number of Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column uncertainty.
min_vertical_column_troposphere_uncertainty_sample	molecules/cm^2	2226 meters	Smallest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column uncertainty.
max_vertical_column_troposphere_uncertainty_sample	molecules/cm^2	2226 meters	Largest Level 2 pixel values contributing to Level 3 grid for the tropospheric vertical column uncertainty.
num_vertical_column_stratosphere_samples	Dimensionless	2226 meters	Number of Level 2 pixel values contributing to Level 3 grid for the stratospheric vertical column.
min_vertical_column_stratosphere_sample	molecules/cm^2	2226 meters	Smallest Level 2 pixel values contributing to Level 3 grid for the stratospheric vertical column.
max_vertical_column_stratosphere_sample	molecules/cm^2	2226 meters	Largest Level 2 pixel values contributing to Level 3 grid for the stratospheric vertical column.
num_vertical_column_total_samples	Dimensionless	2226 meters	Number of Level 2 pixel values contributing to Level 3 grid for the total vertical column.
min_vertical_column_total_sample	molecules/cm^2	2226 meters	Smallest Level 2 pixel values contributing to Level 3 grid for the total vertical column.
max_vertical_column_total_sample	molecules/cm^2	2226 meters	Largest Level 2 pixel values contributing to Level 3 grid for the total vertical column.
solar_zenith_angle	deg	2226 meters	Data is filtered to include only observations with solar zenith angle less than or equal to 80 degrees.
viewing_zenith_angle	deg	2226 meters	Viewing zenith angle at pixel center
relative_azimuth_angle	deg	2226 meters	Relative azimuth angle at pixel center
vertical_column_total	molecules/cm^2	2226 meters	NO2 vertical column
vertical_column_total_uncertainty	molecules/cm^2	2226 meters	NO2 vertical column uncertainty
surface_pressure	hPa	2226 meters	Surface pressure
terrain_height	m	2226 meters	Terrain height
snow_ice_fraction	Dimensionless	2226 meters	Fraction of pixel area covered by snow and/or ice
fitted_slant_column	molecules/cm^2	2226 meters	NO2 fitted slant column
fitted_slant_column_uncertainty	molecules/cm^2	2226 meters	NO2 fitted slant column uncertainty
albedo	Dimensionless	2226 meters	Surface albedo
tropopause_pressure	hPa	2226 meters	Tropopause pressure
amf_total	Dimensionless	2226 meters	NO2 air mass factor
eff_cloud_fraction	Dimensionless	2226 meters	Data is filtered to include only observations with effective cloud fraction less than or equal to 50%.
amf_cloud_fraction	Dimensionless	2226 meters	Cloud radiance fraction for AMF calculation
amf_cloud_pressure	hPa	2226 meters	Cloud pressure for AMF calculation
amf_troposphere	Dimensionless	2226 meters	NO2 troposphere air mass factor
amf_stratosphere	Dimensionless	2226 meters	NO2 stratosphere air mass factor

Terms of Use

Terms of Use

This dataset is in the public domain and is available without restriction on use and distribution. See NASA's Earth Science Data & Information Policy for additional information.

Citations

Citations:

• NASA/LARC/SD/ASDC. (n.d.). TEMPO gridded NO2 tropospheric and stratospheric columns V03 (PROVISIONAL) [Data set]. NASA Langley Atmospheric Science Data Center DAAC. Retrieved from https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003

DOIs

• https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003

Explore with Earth Engine

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Code Editor (JavaScript)

var collection = ee.ImageCollection('NASA/TEMPO/NO2_L3_QA')
    .filterDate('2024-04-01', '2024-04-05')

var visParams = {
  min: 0,
  max: 1.5e16,
  bands: ['vertical_column_troposphere'],
  palette: [
    '000080', '0000D9', '4000FF', '8000FF', '0080FF',
    '00D9FF', '80FFFF', 'FF8080', 'D90000', '800000'
  ]
};
Map.setCenter(-95.06, 42.02, 3)
Map.addLayer(collection, visParams, 'Tropospheric NO2')

Open in Code Editor

TEMPO gridded NO2 (QA filtered) tropospheric and stratospheric columns V03

Nitrogen dioxide Level 3 files provide trace gas information on a regular grid covering the TEMPO field of regard for nominal TEMPO observations. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle. The rasters contain information on tropospheric, stratospheric and …

NASA/TEMPO/NO2_L3_QA, air-quality,nasa,nitrogen-dioxide,pollution,satellite-imagery,tempo,tropomi

2023-08-01T00:00:00Z/2025-09-16T21:03:09Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003
• https://doi.org/10.5067/IS-40e/TEMPO/NO2_L3.003