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

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

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

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

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

TEMPO gridded NO2 (QA filtered) tropospheric and stratospheric columns V03 Stay organized with collections Save and categorize content based on your preferences.

Page Summary

Description

Bands

Terms of Use

Citations

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

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