From chaos to pattern in ocean-driven climate

Part 1 The Atlantic Meridional Overturning Circulation (AMOC) owes its existence to an instability. Periodically, the Gulf Stream bringing warm water from the Caribbean to Europe combines in a positive feedback with the downwelling of cold water in the Northeast Atlantic Norwegian Sea. “Deep water formation” is what links the global surface and deep ocean … Continue reading From chaos to pattern in ocean-driven climate

The breakout from Africa 60 thousand years ago that populated the world

Paleoclimatology, the study of climate in the past all the way back to deep time, is one of the pillars of climate science. It shows us the wide range of climates that have existed on earth, from near-global glaciation in “snowball-earth” epochs to hothouses where the poles were forested. It puts in a correct perspective … Continue reading The breakout from Africa 60 thousand years ago that populated the world

World population will soon peak and decline (doom-mongers wrong again!)

Demographic research shows that by around 2064 the number of people in the world will reach a maximum and start to decline. That's within the lifetime of our children.   With widespread, sustained declines in family size, the world population will likely peak in 2064 at around 9.7 billion, and then decline to about 8.8 … Continue reading World population will soon peak and decline (doom-mongers wrong again!)

The to and fro of the Siberian Taiga-Tundra treeline

One of the most reliable indicators of changing global temperature is the Arctic treeline - the northern-most latitude where it is warm enough for trees to grow. As climate warms the treeline advances north, and during cooling it retreats south. It is impossible for nonlinear-chaotic climate ever to be static and the 20th century is no … Continue reading The to and fro of the Siberian Taiga-Tundra treeline

Clive Best: it’s a circular argument – if we assume CO2 warms the earth, we find that CO2 warms the earth

Reblogged from Clive Best http://clivebest.com/blog/?p=1169 I have been struggling to understand exactly how increasing CO2 levels leads to global warming using  basic physics, and the story is complex. The trapping of certain bands of infrared radiation emitted from the Earth by greenhouse gases is well known. The effective cross-section of CO2 of absorption for CO2 … Continue reading Clive Best: it’s a circular argument – if we assume CO2 warms the earth, we find that CO2 warms the earth

The Ordovician glaciation – glaciers spread while CO2 increased in the atmosphere: a problem for carbon alarmism

There have been three major glaciations over the last half billion years (the Phanerozoic) during which multicellular life has existed. They are the end-Ordovician, the end-Carboniferous and the current Pleistocene. After climate scientists (surviving ones at least) subscribed to the interpretation that CO2 dominantly controls global temperature, the Ordovician glaciation 444 million years ago became … Continue reading The Ordovician glaciation – glaciers spread while CO2 increased in the atmosphere: a problem for carbon alarmism