rgb applications for cloud microphysical analysis in ninjo n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
RGB Applications for Cloud Microphysical Analysis in NinJo PowerPoint Presentation
Download Presentation
RGB Applications for Cloud Microphysical Analysis in NinJo

Loading in 2 Seconds...

play fullscreen
1 / 28

RGB Applications for Cloud Microphysical Analysis in NinJo - PowerPoint PPT Presentation


  • 70 Views
  • Uploaded on

RGB Applications for Cloud Microphysical Analysis in NinJo. Victor Chung SAAWSO Project Workshop April 22-24, 2013 National Lab for Nowcasting and Remote Sensing Meteorology MSC Ontario Environment Canada. Objective.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'RGB Applications for Cloud Microphysical Analysis in NinJo' - rangle


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
rgb applications for cloud microphysical analysis in ninjo

RGB Applications for Cloud Microphysical Analysis in NinJo

Victor Chung

SAAWSO Project Workshop

April 22-24, 2013

National Lab for Nowcasting and Remote Sensing Meteorology

MSC Ontario

Environment Canada

objective

Objective

To demonstrate how to use RGB imageries in NinJo to perform daytime cloud microphysical analysis

why do we need rgb
Why do we need RGB?

...because you can see more with an RGB.....

role of 3 9 m in rgb
Role of 3.9 µm in RGB

http://www.meted.ucar.edu/satmet/goeschan/print/6_2_4_3.htm

the microphysics rgb in ninjo
The microphysics RGB in NinJo

Microphysics (day)

[0.67, 3.7-10.7, 10.7i]

cloud mass a appearance in channel 10 7 and 3 7 m
Cloud mass AAppearance in channel 10.7 and 3.7 µm

10.7µm

Cloud mass A

cold at IR but quite warm at NIR  super-cooled water droplets

T_10.7: -23 to -29 C

3.7 µm

T_3.9: 12 to 20 C

cloud mass a appearance in rgb
Cloud mass AAppearance in RGB

RGB

Super-cooled

water droplets

cloud mass d e appearance in 10 7 and 3 7 m
Cloud mass D & EAppearance in 10.7 and 3.7 µm

10.7 µm

D: cold at IR, warm at NIR

 Super-cooled droplets

E: cold at IR, cold at NIR

 Ice particles

D (-20 to -25 C)

E (-20 to -25 C)

3.7 µm

D (~15 C)

E (-13 to -15 C)

histogram plots for 10 7 and 3 7 m channels for a line across cloud masses d and e
Histogram Plots for 10.7 and 3.7 µm Channels for a Line Across Cloud Masses D and E

3.9 µm (NIR)

10.7 µm (IR)

Small temperature

Range at IR

Two distinct peak at

NIR

Ice

Water

cloud masses d e appearance in rgb
Cloud masses D & EAppearance in RGB

E: ice

RGB

D

E

D: super-cooled water

cloud m ass b evolution from 19 to 21z at 19z
Cloud mass B evolution from 19 to 21Z(at 19Z)

Ice or water?

10.7 µm

3.7 µm

It is water!

0.65 µm

RGB2

scatter plots of 3 7 versus 10 7 m channels for an area over cloud mass b at 19z
Scatter Plots of 3.7 versus 10.7 µm Channels for an Area over Cloud Mass B at 19Z

IR  well below freezing

NIR  warm  water

Conclusion: super-cooled

cloud droplets

histogram plots for 10 7 and 3 7 m channels for an area over cloud mass b at 19z
Histogram Plots for 10.7 and 3.7 µm Channels for an Area over Cloud Mass B at 19Z

10.7 µ

3.7 µm

cloud mass b at 20z
Cloud mass B at 20Z

Ice nucleation is underway!

10.7 µm (IR)

3.7 µm (NIR)

0.65 µm

RGB

scatter plots of 3 7 vs 10 7 m channels for an area over cloud mass b at 20z
Scatter Plots of 3.7 vs 10.7 µm Channels for an Areaover Cloud Mass B at 20Z

Large NIR

spread

Ice nucleation in process

(water drops + ice crystals)

Small IR

spread

histogram plots for 10 7 and 3 7 m channels for an area over cloud mass b at 20z
Histogram Plots for 10.7 and 3.7 µm Channels for an Areaover Cloud Mass B at 20Z

3.7 µm

10.7 µm

cloud mass b at 21z
Cloud mass B at 21Z

Clouds consists of mainly ice crystals

10.7 µm

3.7 µm

0.65 µm

RGB

scatter plots of 3 7 vs 10 7 m channels for an area over cloud mass b at 21z
Scatter Plots of 3.7 vs 10.7 µm Channels for an Areaover Cloud Mass B at 21Z

More pixels with NIR

temperature shift to

The colder side

histogram plots for 10 7 and 3 7 m channels for an area over cloud mass b at 21z
Histogram Plots for 10.7 and 3.7 µm Channels for an Areaover Cloud Mass B at 21Z

10.7 µm

3.7 µm

conclusion
Conclusion
  • The special characteristics of the 3.7 um allows us to create a useful RGB for cloud microphysical analysis
  • Several examples have been used to demonstrate how to use this RGB operationally to differentiate between water and ice clouds
  • This RGB can be applied for summer storm analysis, for example ice nucleation and lightning
  • This RGB can be used in conjunction with other icing products for better cloud icing detection

Ice

Water

thank you

Thank You!

Questions?

outline this slide will not be shown
Outline --- this slide will not be shown

Objective

  • To demonstrate how to perform cloud microphysical analysis using RGB imageries in NinJo

Introduction

Opener

  • With RGB imagery, you can see things that can not be seen with a single channel imagery
  • Characteristics of 3.9 um and its role on RGB imagery

Topic

- Use of RGB in NinJo for cloud microphysics analysis

Thesis (idea convey)

  • RGB imagery helps forecasters to monitoring cloud microphysical properties
  • Good microphysical analysis helps detecting icing, and convective storm analysis

The Body

  • A list of examples for cloud microphysical analysis

Conclusion

Restate the thesis

- RGB should be used more for cloud top microphysical analysis to improve our weather monitoring capability

Action for future works

  • Real-time applications for summer and winter storms
  • Use in conjunction with icing product