Preprints
https://doi.org/10.5194/essd-2021-101
https://doi.org/10.5194/essd-2021-101

  26 May 2021

26 May 2021

Review status: this preprint is currently under review for the journal ESSD.

The first global 883 GHz cloud ice survey: IceCube Level 1 data calibration, processing and analysis

Jie Gong1,2, Dong L. Wu2, and Patrick Eriksson3 Jie Gong et al.
  • 1GESTAR/USRA, Columbia, MD, United States
  • 2NASA Goddard Space Flight Center, Greenbelt, MD, United States
  • 3Chalmers University of Technology, Gothenburg, Sweden

Abstract. Sub-millimeter (sub-mm, 200–1000 GHz) wavelengths contribute a unique capability to fill-in the sensitivity gap between operational visible/infrared (VIS/IR) and microwave (MW) remote sensing for atmosphere cloud ice and snow. Being able of penetrating cloud to measure cloud ice mass and microphysical properties in the middle to upper troposphere, this is a critical spectrum range for us to understand the connection between cloud ice and precipitation processes.

As the first space-borne 883 GHz radiometer, IceCube mission was NASA's latest effort in spaceflight demonstration of a commercial sub-mm radiometer technology. Successfully launched from the International Space Station, IceCube is essentially a free-running radiometer and collected valuable 15-month measurements of atmosphere and cloud ice. This paper describes the detailed procedures for Level 1 data calibration, processing and validation. The scientific quality and values of IceCube data are then discussed, including radiative transfer model validation and evaluation, as well as the unique spatial distribution and diurnal cycle of cloud ice that are revealed for the first time on a quasi-global scale at this frequency.

Jie Gong et al.

Status: open (until 21 Jul 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Jie Gong et al.

Data sets

IceCube Level 1 Radiance Data and Codes Jie Gong; Dong L. Wu https://doi.org/10.25966/3d2p-f515

Model code and software

IceCube Level 1 Radiance Data and Codes Jie Gong; Dong L. Wu https://doi.org/10.25966/3d2p-f515

Jie Gong et al.

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Short summary
Launched from the International Space Station, IceCube radiometer orbited the Earth for 15 months and collected the first spaceborne radiance measurements at 874–883 GHz frequency. This channel is uniquely important to fill in the sensitivity gap between operational visible/infrared and microwave remote sensing for atmospheric cloud ice and snow. This paper delivers the IceCube Level 1 radiance data processing algorithm and provides data quality evaluation and scientific merit discussion.