MLS/Aura Daily Binned Relative Humidity With Respect To Ice on Global Grids

ML3DBRHI Version 4.2 provides daily binned relative humidity with respect to ice from the EOS Aura Microwave Limb Sounder. The data offers near-global coverage from -82 to +82 degrees latitude at a 4 by 5-degree resolution, with a vertical range from 316 to 0.0215 hPa. It is produced by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Analyzing spatial patterns of upper atmospheric humidity based on the lat-lon map vs pressure data groups.
• Studying zonal mean distributions of relative humidity with respect to ice using the lat vs pressure zonal mean data.
• Investigating vortex dynamics and polar atmospheric conditions using the vortex average vs theta data group.
• Assessing variability and uncertainty in humidity measurements based on the standard deviation and RMS fields included in each group.

Strengths

• Data version 4.2 indicates a mature, processed product.
• Near-global spatial coverage from -82 to +82 degrees latitude.
• Archived in netCDF4 format, which is compatible with HDF5 readers and tools.
• Each file contains six distinct group objects with average, min, max, standard deviation, and RMS data fields.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Derived from radiances measured by the 118 and 190 GHz radiometers on the EOS Aura Microwave Limb Sounder (MLS).

Time Range

Daily binned data.

Freshness

Last updated 2026-03-13 00:32:11.944890; freshness should be verified.

Geography

Near-global (-82 to +82 degrees latitude).