Known unknowns

3 June 2005
Today on openDemocracy, Climateprediction.net's chief scientist Dave Stainforth outlines some of the basics on what state-of-the art climate modelling can and cannot do, and what it can and cannot tell us.

I asked him to make his account as simple as possible, but no simpler. So it still takes a wee bit of effort.

As someone explained an aspect of this to me in another context:

"Understanding the sensitivity of the earth's climate to man made greenhouse gas emissions is difficult. We don't yet know how big the effect will be, but we can be sure that there will be an effect, and that this could be quite large.

Think of the extra greenhouse gas as analogous to additional weight on the accelerator pedal of a car. If one is not familiar with the car, one cannot be sure how quickly it will respond and how fast it may go. Climate modelling helps to limit the range of uncertainty.

The thing is, we don't know whether we're driving a Honda Civic or an S Class Mercedes, and we're not sure what happens when someone tunes up the engine or other parts of the car's system relevant to acceleration".

Dave writes:

"Greenhouse gas emissions from human activities are likely to have a much larger effect on the climate during the 21st century than any natural factors, short of very low likelihood events such as a collision with a large meteor" (full text here).

Caspar Henderson

Why we're suing over the £23m NHS data deal with 'spy tech' firm Palantir

Right as the NHS battles 'vaccine hesitancy', why is the government giving a CIA-backed firm – whose spyware has been accused of creating ‘racist’ feedback loops in US policing – a major, long-term role in handling our personal health information, and in England's cherished NHS?

Get the inside story from the journalists and lawyers battling to force transparency from the government on what they're doing with public money – and our health records.

Join us for this free event on 4 March at 5pm UK time/12pm EST.

Hear from:

Cori Crider Lawyer, investigator and co-founder of Foxglove, a non-profit that seeks to make the use of technology fair for everyone

Caroline Molloy Editor ourNHS and openDemocracyUK

Chair: Mary Fitzgerald Editor-in-chief, openDemocracy

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