Den stora tråden om global uppvärmning/växthuseffekten

A statistical model including carbon dioxide, temperature, drought and forest dynamics accounts for the observed trends and indicates a long-term future decline in the African sink, whereas the Amazonian sink continues to weaken rapidly. Overall, the uptake of carbon into Earth’s intact tropical forests peaked in the 1990s. Given that the global terrestrial carbon sink is increasing in size, independent observations indicating greater recent carbon uptake into the Northern Hemisphere landmass10*reinforce our conclusion that the intact tropical forest carbon sink has already peaked. This saturation and ongoing decline of the tropical forest carbon sink has consequences for policies intended to stabilize Earth’s climate.

Dr John McLean, prominent Australian climate analyst, and former expert reviewer of early IPCC reports, writes: “Climate activists would have us believe that man-made warming is a fact and it’s serious. After reading the various documentation of meetings leading up to the creation of the Intergovernmental Panel on Climate Change (IPCC) and then from the IPCC itself, I conclude that it’s all been vastly exaggerated. There is no certainty that there’s any man-made warming (or man-made climate change) worth worrying about".

Findings from NIWA's 2020 snowline survey: glaciers looked a lot better this year than the past two years Snow capped mountain

“I am not at all heartened by what looks like a decent snowline this year – it is part of climate variability, and some good years are to be expected."

The snowline survey began in 1977 and provides an incredibly valuable long-term record of how New Zealand’s glaciers have retreated over time due to climate change. Scientists estimate about 30 per cent of New Zealand’s ice that was catalogued in the late 1970s has been lost in the past 40 years.

The past two years of the snowline survey have seen the impact of particularly harsh conditions imposed on our glaciers, with marine heatwaves and record temperatures taking their toll.*

NIWA climate scientist Dr Andrew Lorrey says while the glaciers looked a lot better this year than the past two years, it could not be considered any kind of recovery.

“You would need to see 20 to 30 years like this one to even start to consider whether the recent damage that has been done can be reversed to any degree. Glaciers can take a very long time to grow. I am not at all heartened by what looks like a decent snowline this year – it is part of climate variability, and some good years are to be expected."