A Human Influence On Precipitation
‘Has Yet To Be Detected’
“Climate model output suggests decreasing rainfall as a consequence of anthropogenic greenhouse gas radiative forcing.”
“[I]f anthropogenic forcing has impacted the [regional rainfall pattern], the signal has yet to be detected above the level of natural climate variability.” – Lachniet et al., 2017
According to climate models, precipitation trends were supposed to have intensified as a consequence of human activity.
And yet after compiling decades of observational and proxy (paleoclimate) evidence, it has been determined there has been no detectable global-scale human influence on rainfall patterns in the last hundred years (even hundreds of years). Instead, any variability in the hydrological cycle can be strongly linked to non-anthropogenic forcing mechanisms, namely solar activity and natural oceanic/atmospheric oscillations (NAO, PDO, AMO, ENSO).