BackForward Variable: Cloud drop effective radius

Definition
Full name Cloud drop effective radius
Definition Size distribution of liquid water drops, assimilated to spheres of the same volume. Considered as both a 3D field throughout the troposphere and a 2D field at the top of cloud surface.
Measuring Units μm Uncertainty Units μm
Horizontal Res Units km Vertical Res Units
Stability Units μm (Stability /decade)

 

Comment: Replaces "Cloud drop size (at cloud top)"
Last modified: 2019-11-28
Applied in OSCAR/Space Gap Analysis: Yes
Classification
  • Domain: Atmosphere
    • Sub-domain: Clouds and precipitations
      • Variable: Cloud drop effective radius
        • Measured in Layers:
          • FT
          • PBL
          • Cloud-top
  • Cross-cutting themes:

Requirements defined for Cloud drop effective radius  (6)

This tables shows all related requirements. For more operations/filtering, please consult the full list of Requirements
Note: In reading the values, goal is marked blue, breakthrough green, threshold orange
Application-dependent Technical Priority (ATP) Magenta and Relative priority of the attributes Red

Id Variable Layer App Area ATP Uncertainty Layer/s Quality Coverage Quality Stability / decade Hor Res Ver Res Obs Cyc Timeliness Coverage Conf Level Val Date Source General Comment Application Area Comment Horizontal Coverage Comment Observation Comment Performance Comment
16 Cloud drop effective radius Cloud-top 2.8 Aeronautical Meteorology 15 μm
20 μm
30 μm
50 km
70 km
100 km
60 min
90 min
3 h
60 min
90 min
2 h
Global firm 2000-06-23 ET ODRRGOS gnd - Fl 260
795 Cloud drop effective radius 2.5 Atmospheric Climate Monitoring 0.5 1 μm
2 μm
4 μm
0.5
0.1 μm
0.2 μm
0.4 μm
0.5
25 km
100 km
500 km
0.5
60 min
24 h
30 d
0.5
60 min
3 h
12 h
0.5
Global firm 2023-04-28 GCOS-245: The 2022 ECVs Requirements (GCOS-245) Definition in GCOS-244: Ratio of integral of water droplets size distribution in volume divided by integral in area (µm). Requirements for uncertainty and stability are for cloud drop effective radius as water. For ice apply factor 2
977 Cloud drop effective radius Forecasting Atmospheric Composition 0.5 μm
2 μm
3 h
30 d
3 h
12 h
Global firm 2022-07-27 GAW Expert Team on Atmospheric Composition Network Design and Evolution
978 Cloud drop effective radius 2.6 Atmospheric Composition Forecasting and Monitoring 0.5 μm
2 μm
3 h
30 d
3 h
12 h
Global firm 2022-07-27 GAW Expert Team on Atmospheric Composition Network Design and Evolution
344 Cloud drop effective radius Cloud-top 2.2 High-Resolution Numerical Weather Prediction 1 μm
2 μm
5 μm
0.5 km
2 km
10 km
15 min
60 min
3 h
15 min
30 min
2 h
Global reasonable 2011-08-04 T Montmerle
260 Cloud drop effective radius Cloud-top 2.1 Global Numerical Weather Prediction and Real-time Monitoring 1 μm
2 μm
5 μm
5 km
15 km
50 km
60 min
3 h
12 h
6 min
30 min
6 h
Global tentative 2009-02-10 John Eyre