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Full catalog/TRPSYL2CH4CRS1FS
TRPSYL2CH4CRS1FS·v1·dataset

Methane in the air, summary (CrIS)

TROPESS CrIS-JPSS1 L2 Methane for Forward Stream, Summary Product V1 (TRPSYL2CH4CRS1FS) at GES DISC
atmosphere NASA GES_DISC Level 2 active
In plain English

What it measures. How methane is distributed at different heights in the atmosphere, with uncertainty estimates, in a condensed summary form for each day.

How it's made. Retrieved from the CrIS instrument on the NOAA-20 satellite using the TROPESS project's atmospheric-analysis algorithm, at about 14 km resolution.

How & where you'd use it. Supports tracking of methane, a potent greenhouse gas, for climate and air-quality research.

What's measured

ATMOSPHERE › ATMOSPHERIC CHEMISTRY › CARBON AND HYDROCARBON COMPOUNDS › METHANE

Coverage & cadence

  • Time span2021-02-01 → ongoing
  • Measured byJPSS-1 (CrIS)
  • Processing levelLevel 2
  • Spatial extent-180, -90, 180, 90
  • StatusACTIVE

What you can do with it

  • Map air pollutants — NO₂, aerosols, ozone
  • Track greenhouse gases and Earth's energy budget
  • Feed weather and air-quality analysis
Official description

The TROPESS CrIS-JPSS1 L2 Methane for Forward Stream, Summary Product contains the vertical distribution of the retrieved atmospheric state of methane (CH4), and formal uncertainties measured by the CrIS instrument on the JPSS-1 (NOAA-20) satellite. The forward stream standard product is global for the time period from 2021-04-01 to present. The NASA TRopospheric Ozone and Precursors from Earth System Sounding (TROPESS) project, uses an optimal estimation algorithm, known as the MUlti-SpEctra, MUlti-SpEcies, Multi-SEnsors (MUSES). The data files are written in the netCDF version 4 file format, and each file contains one day of data. The data have a spatial resolution of 14 km (CrIS nadir FOV), and are reported at 26 vertical levels from the surface to 0.1 hPa. The principal investigator for the TROPESS project is Kevin W. Bowman.

Get the data

trpsyl2ch4crs1fs_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="TRPSYL2CH4CRS1FS",
    version="1",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from GES_DISC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.