LP DAAC Releases EMIT Methane Detection Data Products!

[LP DAAC - jwilson]

The LP DAAC is pleased to announce the release of NASA’s Earth Surface Mineral Dust Source Investigation (EMIT) Level 2B Methane Enhancement Data (EMITL2BCH4ENH) and Level 2B Estimated Methane Plume Complexes (EMITL2BCH4PLM) data products at a 60 meter (m) spatial resolution. These data products provide methane enhancements and estimated methane plume complexes in Cloud Optimized GeoTIFF (COG) format. The products are primarily based on the EMIT L1B At-Sensor Calibrated Radiance and Geolocation Data (EMITL1BRAD) product and use an adaptive matched filter process along with a manual review process to identify methane plume complexes.

EMIT is an imaging spectrometer that records visible to shortwave infrared (VSWIR) light reflected from the surface of Earth’s arid dust source regions to better understand the surface mineral composition, the resulting composition of emitted dust, and consequently, its impact on heating and cooling Earth’s atmosphere and surface. In addition to its primary objective, EMIT has demonstrated the capacity to characterize methane (CH4) and carbon dioxide (CO2) point source emissions by measuring gas absorption features in the shortwave infrared (SWIR) bands. The EMIT Level 2B Methane detection products can be used to identify and quantify areas of high methane enhancement in the atmosphere at the time of EMIT’s observation. An interactive map showing the locations of methane plumes along with metadata and additional EMIT data products can be found on the VSWIR Imaging Spectroscopy Interface for Open Science (VISIONS) EMIT Open Data Portal.

A citation containing the Digital Object Identifier for each data product is provided below.

EMIT L2B Methane Enhancement Data 60 m V001 – EMITL2BCH4ENH
Green, R., A. Thorpe, P. Brodrick, D. Chadwick, C. Elder, C. Villanueva-Weeks, J. Fahlen, R. Coleman, D. Jensen, W. Olsen-Duvall, S. Lundeen, A. Lopez, D. Thompson. EMIT L2B Methane Enhancement Data 60 m V001. 2023, distributed by NASA EOSDIS Land Processes Distributed Active Archive Center, https://doi.org/10.5067/EMIT/EMITL2BCH4ENH.001. Accessed YYYY-MM-DD.

EMIT L2B Estimated Methane Plume Complexes 60 m V001 – EMITL2BCH4PLM
Green, R., A. Thorpe, P. Brodrick, D. Chadwick, C. Elder, C. Villanueva-Weeks, J. Fahlen, R. Coleman, D. Jensen, W. Olsen-Duvall, S. Lundeen, A. Lopez, D. Thompson. EMIT L2B Estimated Methane Plume Complexes 60 m V001. 2023, distributed by NASA EOSDIS Land Processes Distributed Active Archive Center, https://doi.org/10.5067/EMIT/EMITL2BCH4PLM.001. Accessed YYYY-MM-DD.

The EMIT data products are available for download through NASA’s Earthdata Search.

Additional EMIT resources, such as guides, short how-tos, and tutorials can be found on the LP DAAC E-Learning Resources page and the NASA EMIT-Data-Resources Repository. Helpful scripts for working with EMIT data, such as converting to ENVI format can be found in the EMIT-Utilities Repository.

Have questions? Please contact LP DAAC User Services.
https://lpdaac.usgs.gov/news/lp-daac-releases-emit-methane-detection-data-products/