Contrails - may be a negative side

[Vic]

How do you know? Like I said up-thread, we only have one direct observation of a varying climate, over the tiniest fraction of time imaginable, but evidence like varved sediments say things could happen pretty quick in the past. Humans think they are so important, everything needs to revolve around and involve them. The earth is quite capable of some pretty snazzy moves all on its own (hmmm ... maybe with occasional help for meteorites )

Wow, a geologist who doesn't think you can observe the rocks, and fossils and etc. to determine what happened way back in time before humans were around. Weird science there.

 

[RooFlyer]

Wow, a geologist who doesn't think you can observe the rocks, and fossils and etc. to determine what happened way back in time before humans were around. Weird science there.

No, of course that's the exact opposite of what I'm saying. . 'climate scientists' can look back maybe a few thousand years to detect variability. Geologists can look as far back as unmetamophosed rocks exist. A few billion, at least. Oxidising atmosphere vs reducing one, acid environment etc, using the principle of what is seen in the geological record should be interpreted in terms of processes observable today.

Sometimes the temporal resolution can be year by year, although that gets rarer the further back you go.

No contrails detectable though

 

[Forg]

lol
But the scientists do know youre doing medicine, and only tel you what you can absorb.
Be reassured to know that you would've at least got more science than the design students.

So it's:
Year 1: tongue depressors
Year 2: the magic of thermometers
Year 3: how to handle the meds company sales rep
Done?

/Engineer

 

[Vic]

No, of course that's the exact opposite of what I'm saying. . 'climate scientists' can look back maybe a few thousand years to detect variability. Geologists can look as far back as unmetamophosed rocks exist. A few billion, at least. Oxidising atmosphere vs reducing one, acid environment etc, using the principle of what is seen in the geological record should be interpreted in terms of processes observable today.

Sometimes the temporal resolution can be year by year, although that gets rarer the further back you go.

No contrails detectable though

climate scientists use more than just the weather records, however...

 

[Vic]

So it's:
Year 1: tongue depressors
Year 2: the magic of thermometers
Year 3: how to handle the meds company sales rep
Done?

/Engineer

I'm sure they would've got some basic newtonian mechanics, PV=nRT, heat, oxidation/reduction reactions and a big chunk of biology.

 

[Forg]

I'm sure they would've got some basic newtonian mechanics, PV=nRT, heat, oxidation/reduction reactions and a big chunk of biology.

Tongue depressors == biology (push tongue down with depresser, tongue responds, biology)
The magic of thermometers == PV=nRT
How to deal with meds-company sales rep == oxidation/reduction reactions (burn rep!!)

But I digress; back to chemtrails!

 

[drron]

But the science lectures were for students from any faculty not just those doing Med.

 

[Forg]

It's pretty harsh dumbing it down for the industrial chemical students just so that the brain surgeons can get it!

 

[RooFlyer]

climate scientist use more than just the weather records, however...

Sure, weather records only go back a few hundred years with any reliability. Ice cores, dendrochronology & all that stuff - good for a few thousand years. That's how we got the Medeval warm period and subsequent cooling

 

[RooFlyer]

It's pretty harsh dumbing it down for the industrial chemical students just so that the brain surgeons can get it!

Rational argument works better than cheap put downs, but there you go.

Tell me, what induced the end of the last ice age? And how is the same effect eliminated from the current cycle to make it all, or largely, humans fault?

 

[Forg]

Rational argument works better than cheap put downs, but there you go.

You're an industrial chemist?

Sorry, humour (especially dry) often falls flat on the intarwebz dunnit?

Tell me, what induced the end of the last ice age? And how is the same effect eliminated from the current cycle to make it all, or largely, humans fault?

Hey, leave me out of this; as I said earlier, I'm not gonna engage in internet arguments over religion!

 

[Vic]

Tell me, what induced the end of the last ice age? And how is the same effect eliminated from the current cycle to make it all, or largely, humans fault?

Two questions to reflect on:
What was the time scale of the end of the last ice age?
What is the time scale of the current warming period?

 

[codash1099]

I don't want to have this descend into a general discussion on global warming (the original quote was about contrails) but:

 

[drron]

Of course there are graphs and graphs.Just go back a little earlier in history.The dinosaurs became extinct about 66 million years ago when CO2 levels were way higher than today but had been falling for about 70 million years.

 

[zenyattamondatta]

Aren't you getting into "oppression of religious beliefs" territory by taking the axis back more than around 6,000 years?

 

[trooper]

Much worse 70 odd years ago..... ()

 

[RooFlyer]

Two questions to reflect on:
What was the time scale of the end of the last ice age?
What is the time scale of the current warming period?

That old chestnut. "Its happening much faster today, so its the humans fault". The last 'ice age' was a very complicated affair, with smaller and larger increase and retreat of global ice cover, with different amounts in different parts of the world. But from what I recall of the literature, there is good evidence that there was some pretty rapid changes afoot. How fast - well, its meaningless to compare the past with present, because nearly all the 'temperature rise' and 'sea level rise' in the current cycle are projections. Models. Not measurements.

But knowing what caused the undoubted cooling/warming in the past would be a good way to start understanding what might be happening today. But no 'climate scientist' will go there.

At which point, I'll let it go, as a) I feel we might be going well off topic and b) I've just arrived in Bulgaria for some delightful touring.

So pip pip and ta ta for now.

 

[wandering_fred]

Man's contribution to the temperature changes are a "drop in the bucket" when compared with volcano emissions and solar intensity changes.
Should we "not worry"? Well I suspect that particulates sprayed into the atmosphere without thought is a BAD IDEA. And the resulting smog in various cities is "in-desputable". If you can see or breathe while in those locations.
Plant some trees. Actually a lot of trees. And try to ensure that tree clearing is a "considered exercise".

Just wandering (as usual)
Fred

 

[cambriamarsh]

Tongue depressors == biology (push tongue down with depresser, tongue responds, biology)
The magic of thermometers == PV=nRT
How to deal with meds-company sales rep == oxidation/reduction reactions (burn rep!!)

But I digress; back to chemtrails!

This belongs in the Humour thread!