Posts by David Bolius

Since the end of the last glacial (ice age) 12,000 years ago, humans have lived in an interglacial period of relatively warm climate called the Holocene. Compared to the highly…

2.7 million years ago permanent ice showed up in the Northern hemisphere and the ice cap on Greenland started to build up. It was the same time the genus homo…

As we have seen in The earth’s thermostat chemical weathering is an important mechanism in regulating CO2 concentrations and thus the climate on a long term range. The rate of…

The question how much it was colder on earth during the last Ice Age is being re-opened. This question has preoccupied climate scientists for decades. Earlier estimates assumed that the…

A chemical thermostat is active on our planet. It has ensured for ages that the natural variations of the climate do not become too extreme. As we have seen, these…

The earth’s climate has changed naturally, including short and long term variations. There have been trends over millions of years as well as short-term fluctuations in the range of decades…

If one looks at changes of the concentration of CO2 in the atmosphere during the last 2000 years, one thing is particularly striking: The amount of CO2 was relatively constant…

Today we can look back 800,000 years into the past from measurements from ice cores from Antarctica. Over this period we have secured data on how the CO2 in the…