Sentinel-5P Methane Density at 2 km from 2021-12 to 2023-11 Monthly Aggregation Time-series Reconstructed

General Description

The monthly aggregated Methane Volume Mixing Ratio dataset is derived from Sentinel-5P to generate a time-series reconstructed monthly aggregated map. The dataset time spans from December 2021 to November 2023 and provides data that covers the entire globe. The mission is still underway and expected to update periodically.

For more info about the s5p Methane product see: https://maps.s5p-pal.com/ch4/.

The dataset can be used in many applications like emission tracing, livestock monitor, and greenhouse gas monitor.

• Monthly time-series:

Methane monthly average value December 2021 – November 2023. Derived using the eumap and scikitmap package in Python . We derived three standard statistics: (1) 10th percentile (p10), median (p50), and 90th percentile (p90).

Data Details

• Time period: December 2021 – November 2023
• Type of data: Methane Volume Mixing Ratio (Unit: ppbv)
• How the data was collected or derived: Derived from 2km Sentinel-5P Menthane using Python running in a local HPC. The time-series analysis were computed using the Scikit-map and eumap Python package.
• Statistical methods used: percentiles 10, 50, and 90.
• Limitations or exclusions in the data: The dataset is not completed gap-filled. Certain areas have no data in the whole time series
• Coordinate reference system: EPSG:4326
• Bounding box (Xmin, Ymin, Xmax, Ymax): (-180.00000, -61.9966697, 180.0000072, 87.37000)
• Spatial resolution: 1/60 d.d. = 0.016666667 (2km)
• Image size: 21,600 x 8,962
• File format: Cloud Optimized Geotiff (COG) format.

Support

If you discover a bug, artifact or inconsistency, or if you have a question please use some of the following channels:

• Technical issues and questions about the code: https://gitlab.com/openlandmap/global-layers/-/issues
• General questions and comments: https://disqus.com/home/forums/landgis/

Name convention

To ensure consistency and ease of use across and within the projects, we follow the standard Open-Earth-Monitor file-naming convention. The convention works with 10 fields that describes important properties of the data. In this way users can search files, prepare data analysis etc, without needing to open files. The fields are:

1. generic variable name: ch4.vmr = methane density methane volume mixing ratio
2. variable procedure combination: m.seacov = monthly aggregated and gap filled by seasonal convolution
3. Position in the probability distribution / variable type: p10/p50/p90 = 10th/50th/90th percentile
4. Spatial support: 2km
5. Depth reference: a = above surface
6. Time reference begin time: 20211201 = 2021-12-01
7. Time reference end time: 20231131 = 2023-11-31
8. Bounding box: go = global (without Antarctica)
9. EPSG code: epsg.4326 = EPSG:4326
10. Version code: v20230628 = 2023-12-08 (creation date)