Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
Get HideMyAss! VPN, PC Mag's Top 10 VPNs of 2016 for 55% off for a Limited Time ×

Comment Re:Maybe the driver believed it was enabled? (Score 4, Informative) 166

The Tesla logs were reported as saying:

Prior to the collision, Autosteer was in use periodically throughout the approximately 50-minute trip.

The most recent such use ended when, approximately 40 seconds prior to the collision, the vehicle did not detect the driverâ(TM)s hands on the wheel and began a rapidly escalating set of visual and audible alerts to ensure the driver took proper control.

When the driver failed to respond to 15 seconds of visual warnings and audible tones, Autosteer began a graceful abort procedure in which the music is muted, the vehicle begins to slow and the driver is instructed both visually and audibly to place their hands on the wheel.

Approximately 11 seconds prior to the collision, the driver responded and regained control by holding the steering wheel, applying leftward torque to turn it, and pressing the accelerator pedal to 42%. Over 10 seconds and approximately 300m later and while under manual steering control, the driver drifted out of the lane, collided with a barrier, overcorrected, crossed both lanes of the highway, struck a median barrier, and rolled the vehicle.

Now, you can believe this or not, but it doesn't match up with your hypothesis.

Comment Re:insightful and considered opinions expected (Score 1) 331

Coral bleaching is reaching levels never seen before due to ocean acidification, which will get much worse as the CO2 level continues to rise.

Most of the current coral bleaching seems to be more caused by high ocean temperatures than acidification. Acidification may become important for bleaching coral in the future.

Comment Re:Why Are We Ignoring Some Greenhouse Gases? (Score 3, Informative) 345

No. The amount of water in the atmosphere is mostly independent of what we put there. It goes away on its own in a few days.

The main reason for the increase in the water in the air is the warming of the Earth, which is mostly caused by carbon dioxide. If we want less moisture in the air we need to reduce long lived greenhouse gases.

Comment Re:Why Are We Ignoring Some Greenhouse Gases? (Score 3, Informative) 345

...methane is barely mentioned except in reference to livestock emissions...

Methane is causing much less warming than carbon dioxide. It is a big worry for the future, though, and much attentions is being paid to it.

Why isn't anyone suggesting interfering with the water cycle?

Water vapor falls back to land very quickly. It can only cause local warming.

...since clouds cause global cooling...

Clouds cause cooling by day but warming by night. The net effect varies by type of cloud. Too many clouds can interfere with growing crops.

Comment Re:Warming good, cooling bad (Score 1) 257

Was there 97% consensus on the Arctic being ice free?

No. I don't think there was any survey done asking that question.

What year is that going to be, I've heard so many predictions from the 97% that I'm not sure anymore.

If the models are right it will probably be somewhere between 2040 to 2080. If the models are wrong it could be earlier.

Comment Re:we're all scientists (Score 2) 634

A scientist is someone who seeks to find the truth via the scientific process. Bill Nye is not this.

In particular, he is not a climate scientist. This is not just a matter of his credentials, but if you listen to him in debates he gets the start and end points right but gets fuzzy about the steps in between. He listens to scientists though, unlike Sarah, which makes him a decent popularizer.

Comment Re:fun fact (Score 1) 504

Name a single coral reef on the planet that doesn't have pH changes greater than .1 every day.

Doesn't matter. There is plenty of evidence of increased coral bleaching now. Whether it is from increased temperature or acidification, I don't really know.

Some places get wetter, some get drier.

And that can happen with or without any global average temperature change.

We can't be sure what will happen in a specific place, but we expect that at the poleward ends of the Hadley cells to generally get drier. That's where many people live. These long term droughts will be caused by anthropogenic global warming.

As for "rain prefers to fall where it is cooler", I think you misunderstand precipitation - what you're looking for is warm, soggy air hitting cold air.

Air flows over a mountain so it gets cooler. That's where the most rain falls. There are other reasons for rain to fall in other places, but that doesn't invalidate this one.

It's our inability to accurately predict the consequences that is most worrying. Uncertainty is not our friend.

Comment Re:fun fact (Score 1) 504

Since warming increases water vapor, and increased water vapor means more precipitation, you've got to be making an argument that this more precipitation magically happens only over the ocean causing more droughts over land. I don't think there's any reasonable proposed mechanism for that kind of peculiar distribution.

Some places get wetter, some get drier. It's hard to be certain where it will be drier, but it will some places. Note that the warming is greatest over land and rain prefers to fall where it is cooler, but this may not be a large effect.

Many corals do not face huge daily pH changes. These are most at risk.

Slashdot Top Deals

Veni, Vidi, VISA: I came, I saw, I did a little shopping.

Working...