The Return of the Clouds Are Clouds Self-Organised Critical Systems? Gillian Cupitt.

The Return of the Clouds The Return of the Clouds

Are Clouds Self-Organised Critical Systems?

Gillian Cupitt

The Return of the CloudsThe Return of the Clouds

What is Self-Organised Criticality?

Examining Fractals in clouds

Looking for periodicity

What is Self-Organised Criticality?What is Self-Organised Criticality?

Self-Organised Criticality is characterised byContinuous Change

High Sensitivity to External

conditions

Events on all Scales

http://www.sst.ph.ic.ac.uk/kim/research/rice.html

Self-Organised CriticalitySelf-Organised Criticality

Some indicators:Regular distribution of catastrophic events

“1/f” noise

FRACTALS

FractalsFractals

Self-Similarity

http://vortex.plymouth.edu/clouds.html

FractalsFractals

Non-linear dimensions1 D

2 D

1.54 D ??

http://classes.yale.edu/math190a/Fractals.html

The PictureThe Picture

http://www.ghcc.msfc.nasa.gov

Fractal AnalysisFractal Analysis

OBEYING A POWER LAWOBEYING A POWER LAW

Finding the dimension…Finding the dimension…

1 - D = gradient of line

D = 1.1

NOT AN INTEGER!

Do All clouds have fractals???

D = 1.4 D = 1.4

PERIODICITY IN CLOUDSPERIODICITY IN CLOUDS

An insight into MATLAB and its errors…

PART 2:

Fourier Transform

AcknowledgementsAcknowledgements

Per Bak, “How nature works”, 1947Neeraj Sharma, for sharing his ideas

and resultsIver Cairns for guidanceMatlab

People who listened to

me whinge about Matlab

The Return of the Clouds Are Clouds Self-Organised Critical Systems? Gillian Cupitt.

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