Citat:
Ursprungligen postat av
Stoix
Mätfelen är överallt, majoriteten av uppvärmningen är nära poöerna. Är det ett svårt koncept att förstå?
Jag förstod ditt tidigare anförande som att ingen uppvärming ägde rum utan berodde på mätbias.
Citat:
Källa på det?
3-4% av koldioxidmängden ansvarar människan för.
Kolla här. Vi som varit med ett tag har hört detta, kanske 100 ggr per år.
Natural carbon sinks (the carbon absorbers, as opposed to "sources," which release carbon) on land and in the ocean have become less effective over time. That is, natural sinks that removed about 60% of annual human-caused CO2 emissions in 1959 now remove about 55% today.
Since 1850, CO2 levels have increased from 280 ppm to around 420 ppm. Scientists understand this increase to be inextricably tied to the human burning of fossil fuels (confirmed by chemical analysis of that rise in CO2). That's a near 50% increase in CO2 levels in just 172 years (about 1 part per million every 23 weeks)! That's over 300 times faster than the natural increase in CO2 levels associated with the warming of Earth's surface coming out of the Ice Age.
https://climate.nasa.gov/faq/55/how-might-earths-atmosphere-land-and-ocean-systems-respond-to-changes-in-carbon-dioxide-over-time/
Om du kan engelska förklaras det hela bra här
https://climate.mit.edu/ask-mit/how-much-carbon-dioxide-does-earth-naturally-absorb
https://www.ipcc.ch/report/ar6/wg1/downloads/faqs/IPCC_AR6_WGI_FAQ_Chapter_05.pdf
For decades, about half of the carbon dioxide (CO2) that human activities have emitted to the atmosphere has been taken up by natural carbon sinks in vegetation, soils and oceans. These natural sinks of CO2 have thus roughly halved the rate at which atmospheric CO2 concentrations have increased, and therefore slowed down global warming.
The historical carbon budget tells us that, of the about 2560 billion tonnes of CO2 that were released into the atmosphere by human activities between the years 1750 and 2019, about aquarter were absorbed by the ocean (causing ocean acidification) and about athird by the land vegetation. About 45% of these emissions remain in the atmosphere (see FAQ 5.1).