Global Human CO2 Emissions Have Been On A Slightly Declining Trend Since 2011
By Kenneth Richard on 9. December 2021
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Until recently, human CO2 emissions were responsible for ~10% of the variance in year-to-year CO2 growth rate. But a new analysis says human CO2 emissions have been slightly declining for the last decade. So 0% responsible, apparently.
CO2 emissions derived from human activity (fossil fuel combustion and land use changes) only account for about +0.1 to 0.3 PgC/yr of the annual change in CO2 concentration. This is about “10% of the variance (σ²) of the CO2 growth rate” (Wang et al., 2013).
Image Source: Wang et al., 2013
Jones and Cox (2005) have pointed out that the changes associated with annual fossil fuel emissions are unlikely to explain CO2 growth rate anomalies.
https://notrickszone.com/2021/12/09/global-human-co2-emissions-have-been-on-a-slightly-declining-trend-since-2011/
