Sentences with phrase «ice albedo feedback»

Typical temperature reconstructions for the late Pliocene however [see one at the top of this story - 3.3 - 3.0 Ma] already show an Earth in which a warmer climatic state is indeed [through for instance ice albedo feedbacks] relatively strong around the poles, and (on average) weaker around the equator, exactly the pattern that is monitored under the current climate warming.

We have more confidence in our present - day (interglacial) result since it is based on fits to direct observations rather than on more uncertain paleoreconstructions, and we find it unlikely that glacial sensitivities were much lower than 2.5 K, given ice albedo feedbacks (47, 48).

The current (and previous) warm periods have a far smaller sensitivity to increasing forcings (even if you accept one sensitivity for all types of forcing), but may include the huge ice albedo feedback, if forcings go down.

But the polar regions can trigger ice albedo feedbacks, amplifying their importance.

«If you can time your emissions so they have the least impact then you will not trigger these very sensitive regions to start warming by this ice albedo feedback process.»

However, once the sea - ice has melted the contribution from the sea - ice albedo feedback will go, changing the climate sensitivity to further forcing.

«If you can time your emissions so they have the least impact then you will not trigger these very sensitive regions to start warming by this ice albedo feedback process.»

Isn't there an even bigger issue that approx half of the temperature amplitude between glacial and interglacial isn't actually due to CO2 or other GHG, but to albedo changes (ice albedo feedback)?

Arctic sea ice extent reconstruction - Kinnard et al. 2011 Sea ice albedo feedback - NASA Polar jet stream - NC State University Greenland ice sheet surface melt - NASA Permafrost distribution in the Arctic - GRID - Arendal Atmospheric methane concentration - NOAA ESRL Russia plants flag at North Pole - Reuters

The differences in total climate feedback parameter between the Cess and coupled models arise primarily from differences in clear - sky feedbacks that are anticipated from the nature of the Cess experimental design (i.e., ignoring the polar amplification and sea ice albedo feedback).

There is nothing in the climate models that says that the positive feedbacks such as the water vapor feedback and the ice albedo feedback, etc. operate only for CO2 warming and not on natural warming.

Even that, however, is misleading for a substantial part of the «forcing» from seasonal drift in insolation is part of the ice albedo feedback.

I explained in my essay in some detail, and several times, the ice albedo feedback effect, and gave an illustrative calculation.

The positive cloud feedback operates by less reflected shortwave, as does the sea - ice albedo feedback.

Positive and Negative Feedbacks (4:36) Ice Albedo Feedback (2:17) Water Vapor Feedback (7:01) Clouds (9:15) Aerosols (5:48) Climate Sensitivity (4:38)