Furthermore,
the only valid observations they used from the Northern Hemisphere were from the Arctic rim, as opposed to in the high Arctic itself.
Not exact matches
However, this simple
observation is
only valid at the level of classical physics — the laws and principles that appear to explain the physics of relatively large objects at human scale.
Science, however, is based on the correspondence theory of truth, i.e. a theory is
valid only to the extent it corresponds to
observations of the natural world.
Since the scaling factor used is based purely on simulations by CMIP5 models, rather than on
observations, the estimate is
only valid if those simulations realistically reproduce the spatiotemporal pattern of actual warming for both SST and near - surface air temperature (tas), and changes in sea - ice cover.