https://doi.org/10.5061/dryad.v9s4mw73g

A 19-year (2001-2019) global dataset of GPM-IMERG feature-associated precipitation identifiers. The precipitation identifier is generated to attribute a rainy grid to a specific meteorological feature.

Description of the data and file structure

Data description

The data collection provides 0.25-deg., 6-hourly global feature-precipitation categories from 2001 to 2019. The data is generated by merging GPM-IMERG observational rainfall (V6 final version) and atmospheric features identified by multiple object-based algorithms. Classified precipitation identifiers include rainfall associated with atmospheric rivers (AR), frontal systems (FT), low-pressure systems (LPS), mesoscale convective systems (MCS), and their co-occurrences (overlapping areas of features at a given time). In addition to algorithm-identified features, precipitation contributed from deep convection, non-deep convection, stratiform, and drizzle are pixel-wise defined using thresholds of CPC MERGE-IR brightness temperature and GPM-IMERG rain rate. The dataset is supported by the Department of Energy and Environment (DOEE): DE-SC0023244.

File information

File name: "GPM-IMERG_feature_precip_{year}_{month}.nc"

File type: NetCDF (network Common Data Form)

Variable description:

precip_id [time, latitude, longitude]: An integer (1-20) corresponding to a classified precipitation identifier.

The 20 classified precipitation identifers are described in the attribute of NetCDF and the supplementary document.

dimensions:
        time = 124 ;
        longitude = 1440 ;
        latitude = 481 ;
variables:
        int64 time(time) ;
                time:units = "hours since 2001-01-01" ;
                time:calendar = "proleptic_gregorian" ;
        double longitude(longitude) ;
                longitude:_FillValue = NaN ;
                longitude:long_name = "longitude" ;
                longitude:short_name = "lon" ;
                longitude:units = "degrees_east" ;
        double latitude(latitude) ;
                latitude:_FillValue = NaN ;
                latitude:long_name = "latitude" ;
                latitude:short_name = "lat" ;
                latitude:units = "degrees_north" ;
        byte precip_id(time, latitude, longitude) ;

Sharing / Access information

Data of identified atmospheric features is archived at NERSC High Performance Storage System (HPSS) (/global/cfs/cdirs/m4374/catalogues/raw_catalogue_files/observations/)

Data of GPM-IMERG V6 Fianl version is archived at NASA GES DISC

Data of CPC MERGE-IR is archived at NOAA Climate Prediction Center

The data of GPM-IMERG feature-associated precipitation identifiers is derived from the above sources.