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Description

The CLOUD_GPC suite provides cloud properties derived from the GISS Polarimetric Cloud (GPC) algorithm, along with additional variables obtained through combination with the OCI CLOUD suite.

Given the novelty of implementing a polarimetric algorithm on a global scale, note that several experimental variables—particularly those intended for diagnostic purposes and future refinement—are included and may change in subsequent, more mature versions.
Core geophysical variables in this suite include:
• cloud_bow_droplet_effective_radius - Cloud droplet effective radius from Cloud Bow polarimetric retrievals using parametric fitting technique (µm)
• cloud_bow_droplet_effective_variance - Cloud droplet effective variance from Cloud Bow polarimetric retrievals using parametric fitting technique (unitless)
• cloud_bow_fit_correlation - Parametric fitting correlation for Cloud Bow retrievals of droplet radius and variance (unitless)
• cloud_bow_rms - Root-mean-square error for Cloud Bow retrievals of droplet radius and variance (unitless)
• cloud_liquid_index - Index measuring the strength of the primary rainbow in polarized reflectances from liquid cloud droplets (unitless)
• cloud_rft_mode_fraction_0 - Fractional contribution of droplet mode 1 from Rainbow Fourier Transform retrievals (unitless; range: 0–1)
• cloud_rft_mode_fraction_1 - Fractional contribution of droplet mode 1 from Rainbow Fourier Transform retrievals (unitless; 0–1)

Version Description

Reprocessing of Ocean Color (OC) Datasets

Product Summary

Platforms
PACE
Instruments
HARP2
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Location
GLOBAL OCEAN
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2024-02-05 to Present
Data Partner
Ocean Biology Processing Group (OBPG) ,
Ocean Biology Distributed Active Archive Center (OB.DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/GCDC/OB.DAAC)
Concept ID
C3600170019-OB_CLOUD
Data State
ACTIVE
Number of Files/Granules
388
Processing Level
3
Published
Updated
Science Keywords
Cloud Properties

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
cloud_bow_droplet_effective_radius Cloud droplet effective radius obtained using Cloud Bow. N/A float32 -32767 3 to 53.400001525879 N/A
cloud_bow_droplet_effective_variance Cloud droplet effective variance obtained using Cloud Bow. micron float32 -32767 0.0015000000130385 to 0.5 N/A
cloud_bow_fit_correlation Correlation of data fit to retrieved cloud droplet radius and variance obtained using Cloud Bow. N/A float32 -32767 -1 to 1 N/A
cloud_bow_rms Root mean square of data fit to retrieved cloud droplet radius and variance obtained using Cloud Bow. N/A float32 -32767 0 to 300 N/A
cloud_liquid_index Index indicating the strength of the primary rainbow in the observed polarized reflectances owing to scattering on liquid drops N/A float32 -32767 -10 to 10 N/A
cloud_rft_mode_fraction_0 Cloud droplet modes effective radius from RFT retrievals for mode 0. micron float32 -32767 0 to 100 N/A
cloud_rft_mode_fraction_1 Cloud droplet modes effective radius from RFT retrievals for mode 1. micron float32 -32767 0 to 100 N/A
lat Latitude degrees_north float32 -999 -90 to 90 N/A
lon Longitude degrees_east float32 -999 -180 to 180 N/A
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