The moon has no atmosphere so it is scorching hot (+100C) during the day and bitterly cold (-150C) at night. The Earth has an atmosphere made up of oxygen, nitrogen, carbon dioxide (CO2) and other gases. Over 150 years ago scientists proved that CO2 traps heat from the sun. We also know without any doubt that burning fossil fuels like oil, gas and coal emits CO2. [more]

First Night at AGU – TIL

Today I Learned, on good authority, that it remains impossible to exclude 3 meters of sea level rise within a single human lifetime from West Antarctica alone.

If it is possible, it’s further impossible to exclude it in the lifetimes of people now living.

The time scales of the collapse of calving ice sheets depend sensitively on temperature and on the height of the cliff. [more]

Climate Science and Falsifiability

John Nielsen-Gammon: “science doesn’t work by making predictions about future events, for the most part; it makes predictions about observable aspects of the world, things detectable in the present. The amount of trust scientists place in climate models, for example, depends on their ability to simulate relevant aspects of the past and present world. The amount of trust the public places in climate science should depend on the weight of evidence in the past and present world, which is enormous.” [more]

We’ll Always Have Paris

Today is a red letter date in the history of the world, as the Paris Accord comes into effect. Or maybe it isn’t. The political and activist side of the climate community is portraying the accord as a breakthrough and the beginning of a turnaround in the world’s self-destructive path. But many of us who are scientific and technical professionals have a far less sanguine view of the whole thing. [more]