all you wanted to know about the gaia theory l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
All You Wanted To Know About The Gaia Theory PowerPoint Presentation
Download Presentation
All You Wanted To Know About The Gaia Theory

Loading in 2 Seconds...

play fullscreen
1 / 19

All You Wanted To Know About The Gaia Theory - PowerPoint PPT Presentation


  • 220 Views
  • Uploaded on

All You Wanted To Know About The Gaia Theory. Pietro Paolo Bertagnolio 23 January 2008 Proseminar Presentation Techniques. Gaia is NOT (only) a goddess. FACTS: Chemical Disequilibrium, Time Records, Daisyworld. HYPOTHESIS: “ The Earth System actively

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 'All You Wanted To Know About The Gaia Theory' - tory


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
all you wanted to know about the gaia theory

All You Wanted To Know About The Gaia Theory

Pietro Paolo Bertagnolio

23 January 2008

Proseminar Presentation Techniques

gaia is not only a goddess
Gaia is NOT (only) a goddess.

FACTS: Chemical Disequilibrium,

Time Records, Daisyworld

HYPOTHESIS: “The Earth System actively

(Gaia Hypothesis) self-regulates.”

PARADIGM: “The Earth is like

(Gaia Theory)a livingbeing.”

RESEARCH: Feedback loops,

(Geophysiology) Self-regulation mechanisms

All You Wanted To Know About Gaia

the history of gaia
The History of Gaia
  • 1785: James Hutton (the “father of geology”) the Earth as a superorganism.
  • 1927: Vladimir Vernadsky the biosphere drives geological evolution.
  • 1966: Lynn Margulis the cells are communities of once-independent microorganisms (endosymbiosis)
  • 1979: James Lovelock“Gaia: A new look at life on Earth”.

All You Wanted To Know About Gaia

living planets dead planets
Living planets, dead planets

From Lovelock (1990)

All You Wanted To Know About Gaia

what do they have in common
Defined boundary:

Atmosphere

Constant properties:

Oxygen conc.

Ocean salinity

Surface temperature

Defined boundary:

Membrane

Constant properties:

pH

Osmotic pressure

Ionic charge

What do they have in common?

HOMEOSTASIS

All You Wanted To Know About Gaia

homeostasis and daisyworld
Homeostasis and Daisyworld

From Olbers (2001)

All You Wanted To Know About Gaia

homeostasis and daisyworld9
Homeostasis and Daisyworld

From Lenton (1998)

All You Wanted To Know About Gaia

homeostasis and earth
Homeostasis and Earth

From Lovelock (1990)

O2 and CH4 are produced by bacterial metabolism.

Could these be the Earth’s “daisies”?

All You Wanted To Know About Gaia

definition of paradigm
Definition of Paradigm

Scientists develop problems, theories, models and experiments in a given frame, called paradigm.

At the core of each paradigm there is often an analogy.

Thomas S. Kuhn

(1922 - 1996)

From Kuhn (1962)

All You Wanted To Know About Gaia

examples of paradigm 1
Examples of Paradigm (1)

The universe

is like

Earth-centered spheres

Sun-centered spheres

an infinite space

All You Wanted To Know About Gaia

examples of paradigm 2
Examples of Paradigm (2)

is like

microscopic particles

Light

microscopic waves

a quantum wavefunction

All You Wanted To Know About Gaia

gaia as a paradigm
Gaia as a paradigm

The Earth system

is like

an electronic circuit

a living being

All You Wanted To Know About Gaia

dms cycle main characters
DMS cycle: Main characters

Clouds

Phytoplankton

Dimethylsulfide (DMS)

Dimethylsulfonio propionate

All You Wanted To Know About Gaia

dms cycle claw
DMS cycle: CLAW

From Charlson et al. (1987)

All You Wanted To Know About Gaia

dms cycle anti claw
DMS cycle: Anti-CLAW

From Charlson et al. (1987)

All You Wanted To Know About Gaia

summary
Summary
  • Lovelock speculates that the Earth system could have some self-regulating mechanisms. (Gaia hypothesis)
  • This leads to investigate the Earth system as it was a living organism. (Geophysiological paradigm)
  • New research has been stimulated by this new way to look at the Earth. (DMS cycle - CLAW hypothesis)

All You Wanted To Know About Gaia

that s all folks
That‘s all, folks!

References:

  • Charlson, R. J., Lovelock, J. E., Andreae, M. O., and Warren, S. G., (1987), Oceanic phytoplankton, atmospheric sulphur, cloud albedo and climate. Nature 326, 655-661.
  • Kuhn, T. S. (1968), The structure of scientific revolutions, University of Chicago Press.
  • Lenton, T. M. (1998), Gaia and natural selection, Nature 394, 439-447.
  • Lovelock, J. E. (1990),The Ages of Gaia, Bantam Books.
  • Olbers, D. (2001), A gallery of simple models from climate physics, Stochastic Climate Models, Progress in Probability, 49, 3-36.

All You Wanted To Know About Gaia