Generally, warming is greater over
land than over the oceans because water is slower to absorb and release heat (thermal inertia).
Since the amplification factor over land is
less than that over the oceans, this suggests that the amplification factor over the CONUS land may even be less than 1.
Credit: NASA] The study notes that the world's warming is greatest at high latitudes of the Northern Hemisphere, and it is larger over land
than over ocean areas.
Warming, particularly since the 1970s, has generally been greater over land
than over the oceans.
When the earth's surface cools or is heated by the sun, the temperature change is greater - and faster - over the land
than over the oceans.
It will be much greater in the higher latitudes than in the equatorial regions, greater over land
than over oceans, and greater in continental interiors than in coastal regions.
As a projected global warming will be more rapid over land
than over the oceans, the continental - scale land - sea thermal contrast will become larger in summer and smaller in winter.
Interannual variability of surface temperature is larger in the winter hemisphere than in the summer and larger over land
than over ocean (Fig. 2).
Further affirmation of the reality of the warming is its spatial distribution, which has largest values at locations remote from any local human influence, with a global pattern consistent with that expected for response to global climate forcings (larger in the Northern Hemisphere than the Southern Hemisphere, larger at high latitudes than low latitudes, larger over land
than over ocean).
Both in wet and dry seasons precipitation over Australia is four to six times lower
than over the ocean.
Warming, particularly since the 1970s, has generally been greater over land
than over the oceans.