“Planet Earth likes carbon dioxide (CO2) at 180 – 280 parts per million (ppm). It has been like that through many ice ages and warmer inter-glacial periods. We’ve now increased CO2 in the atmosphere to over 400ppm in the span of only 150 years…” (Peter Wadhams)
“Over just the past three years [2014-2016], global temperatures have risen by about 0.4 degrees Celsius. This was an extreme acceleration in the rate of warming. One that is unmatched in all of the past 136 years of climate record keeping…” (Robert Scribbler)
“We need to use less energy today. We can’t change to clean energy fast enough to prevent dangerous global warming, so we have to cut fossil fuel use in the meantime…” (Kevin Anderson)
During November 2016 Arctic temperatures were 20degC higher than normal
As Erika Spanger-Siegfried (UCSUSA) wrote on 21 November 2016: “It is polar night in the Arctic – a darkness that lasts from early October to early March. Temperatures rarely escape freezing in that darkness until the light begins to return in spring. Right now, however, temperatures across much of the Arctic are 36 degrees F (20 degrees C) above normal. Large areas are well above freezing. And instead of rapidly expanding, sea ice extent is in decline. Taken together, this is not unusual. It’s unheard of.”
“What we are seeing is both surprising and alarming. This is faster than the models. It is alarming because it has consequences.” (Rasmus Tonboe, a sea ice remote sensing expert at the Danish Meteorological Institute in Copenhagen quoted here)
“…global temperatures are now increasing at a lightning rate that appears to be unprecedented in at least the past 60 million years.” – Robert Scribbler here
From 2014-2016 there was an average increase of 0.11C per year. At this rate we will reach 2C by 2025.
Now at 406 parts per million
The planet used to maintain its own energy and temperature balance, which was just enough for life on earth to thrive. For hundreds of thousands of years CO2 was in balance at between 180 parts per million (ppm) and 280ppm.
Then, since about the start of the industrial revolution, humans began releasing increasing amounts of CO2 and other greenhouse gasses into the atmosphere.
The thin blanket of CO2 has now been expanded into a snug duvet of over 400ppm. The effect is that the planet is getting warmer fast: the energy imbalance is now more than 0.6W/m2 over the total surface of the planet. This means excess energy equal to around 400 000 Hiroshima explosions is added to the planet every day of the year. (Hansen here at 4:38)
And that excess heat energy is now melting the polar ice cap, as well as the continental ice of Greenland and Antarctica. Arctic sea ice has lost 70-80% of its volume over last 30 years.