From Climate Journal.
Climate science is unsettled and the IPCC’s focus on anthropogenic
climate change may not be justified.
Here is the link.
https://www.mdpi.com/2225-1154/11/9/179
Here is the abstract.
A statistical analysis was applied to Northern Hemisphere
land surface temperatures (1850–2018) to try to identify the main drivers of
the observed warming since the mid-19th century. Two different temperature
estimates were considered—a rural and urban blend (that matches almost exactly
with most current estimates) and a rural-only estimate. The rural and urban
blend indicates a long-term warming of 0.89 °C/century since 1850, while the
rural-only indicates 0.55 °C/century. This contradicts a common assumption that
current thermometer-based global temperature indices are relatively unaffected
by urban warming biases. Three main climatic drivers were considered, following
the approaches adopted by the Intergovernmental Panel on Climate Change
(IPCC)’s recent 6th Assessment Report (AR6): two natural forcings (solar and
volcanic) and the composite “all anthropogenic forcings combined” time series
recommended by IPCC AR6. The volcanic time series was that recommended by IPCC
AR6. Two alternative solar forcing datasets were contrasted. One was the Total
Solar Irradiance (TSI) time series that was recommended by IPCC AR6. The other
TSI time series was apparently overlooked by IPCC AR6. It was found that
altering the temperature estimate and/or the choice of solar forcing dataset
resulted in very different conclusions as to the primary drivers of the
observed warming. Our analysis focused on the Northern Hemispheric land
component of global surface temperatures since this is the most data-rich
component. It reveals that important challenges remain for the broader
detection and attribution problem of global warming: (1) urbanization bias
remains a substantial problem for the global land temperature data; (2) it is
still unclear which (if any) of the many TSI time series in the literature are
accurate estimates of past TSI; (3) the scientific community is not yet in a
position to confidently establish whether the warming since 1850 is mostly
human-caused, mostly natural, or some combination. Suggestions for how these
scientific challenges might be resolved are offered.