Not exact matches
SW fails to mention effects that may counter-act warming trends, such as irrigation,
better shielding of the thermometers, and increased
aerosol loadings, in addition to forgetting the fact that forests were cut down on a large scale in both Europe and North America in the earlier centuries.
Li et al., 2017 (DOI: 10.1016 / j.quascirev.2017.01.009): «Additionally, increased El Nino - Southern Oscillation (ENSO) strength (possibly El Ni ~ no - like phases) during drying periods, increased volcanic eruptions and the resulting
aerosol load during cooling periods, as
well as high volumes of greenhouse gases such as CO2 and CH4 during the recent warming periods, may also play a role in partly affecting the climatic variability in NC, superimposing on the overall solar dominated long - term control.»
We have had
good satellite observations of
aerosols for the past decade or so, but it is a challenge to deal with historical
aerosol loading.