Global Warming. Part 4 - Consequences and Climate models

Global Warming. Part 4 - Climate models & Consequences.


This video is the part of PBS documentary "Global Warming. What's Up With The Weather?"
http://www.pbs.org/wgbh/warming/

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[david222444]

Any more fairy tales?

[wayne487msc]

I checked the preindustrial CO2 raw data and it was all over the place. I did not find any data that conclusively supported the claim that today's level was higher or lower. Given their claimed 100 ppm atmospheric increase, then we are responsible for 2%, or just 2ppm. This is not a big deal. Recent science has shown that cirrus clouds have a negative feedback and the tropical warm spot did not appear as predicted. The science presented here is unproven.

[x11115]

co2 charts are not an opinion. Unfortunatly they are telling us that co2 has been growing since the industrial revolution. that is not an opinion it is fact.

[acidgawd999]

"Desertification of the American Midwest is good for agriculture"--Fred Singer

[TRUMPHENT]

Stop right there, Fred Singer 9:20. BC is experiencing the worst bark beetle infestation in history. The impact of global warming is not good for forests.

[screename4231]

they are based on well-established laws of physics. But there is clearly much more to the models than physical laws, otherwise the models would all produce the same output, which they do not, and there would be no need for confidence estimates for model forecasts, which there certainly is. Climate models are, in effect, mathematical ways for experts to express their opinions." Green and Armstrong contend that the possibility of accurate long-term climate forecasts has never been proven.

[screename4231]

The ocean component calculates currents, heat content and salinity. The atmospheric and oceanic components interact, for example with evaporation from the oceans into the atmosphere and with atmospheric winds affecting ocean currents. Different models vary in such basics as grid size and therefore do not give the same results. Kesten Green and J. Scott Armstrong have criticized the validity of model projections of future climate, arguing "Advocates of complex climate models claim that

[screename4231]

Climate models are systems of differential equations based on the basic laws of physics, fluid motion, and chemistry. To "run" a model, scientists divide the planet into a 3-dimensional grid, apply the basic equations, and evaluate the results. The atmospheric component of the model calculates winds, heat transfer, radiation, relative humidity, surface hydrology, and surface fluxes of heat and moisture within each grid and evaluates interactions with neighboring points.

[DragonflyGlitter]

1:26 to 1:42

Wouldn't this work as a counter to all this

co2 and carbon dioxide?

I do understand that sulfate aerosols are not a good thing in themselves, but it seems they are dismissing this variable throughout the rest of the documentary.