It is very likely — 90 percent to 100 percent probability — that heat waves will increase in length, frequency and / or intensity
over most land areas.
While total rain is expected to decrease in some areas, more of the rain that does occur is expected to occur in heavy falls
in most land areas (3 percent to 10 percent more heavy rain per degree Celsius).
Modelled surface air temperature increases in all regions and seasons,
with most land areas warming more rapidly than the global average (Giorgi et al., 2001; Ruosteenoja et al., 2003).
Such sweeping changes have been caused by an average warming of less than 2 degrees Fahrenheit over
most land areas of the country in the past century, the scientists found.
«Global climate models predict increased drying over
most land areas during their warm season, as carbon dioxide and other greenhouse gases increase,» says Dai.
It is virtually certain that over
most land areas, there will be warmer and fewer cold days and nights, warmer and more frequent hot days and nights.
Since the TAR, the observational basis of analyses of extremes has increased substantially, so that some extremes have now been examined over
most land areas (e.g., daily temperature and rainfall extremes).
In
most land areas, regional warming is larger than global warming (see Christensen et al., 2007).
Over
most land areas, warmer and fewer cold days and nights, warmer and more frequent hot days and nights
«It is very likely that the length, frequency and / or intensity of warm spells, including heat waves, will continue to increase over
most land areas...