MLR gives an indication of the relative influence of various
contributors over the temperature, and what happens to temperature when a contributor changes.
Not exact matches
But their PNAS publication also referred to natural climate cycles, superimposed on the trend line, like ENSO and solar variability, both of which have been net
contributors to global cooling
over 1998 - 2008 [so climate skeptics can not — as they still do — point to either the Sun or El Niño to explain the world's
temperature graph
over that period of time].
Additionally, we show that the largest regional
contributor to global
temperature trends
over the past two decades is land surface
temperature in the NH extratropics.
The analysis shows that the leading
contributor to variations in surface
temperature over the 20th century is a largely systematic upward trend in most locations that appears to be consistent with estimates of the effects of increasing greenhouse gas concentrations.
The positive feedback of increased soil
temperature leading to increased decomposition and therefore natural carbon emissions is a fairly modest
contributor to the total projected business as usual carbon emissions
over the century: average IPCC AR4 model land carbon storage changes due to climate change yielded a 63 ppm CO2 increase
over the counterfactual by the year 2100.