The number of stations reflecting a locally significant increase in the proportion
of total annual precipitation occurring in the upper five percentiles of daily precipitation totals outweighs the number of stations with significantly decreasing trends by more than 3 to 1 (Figure 2.36 c).
In some parts of the country, the torrents of rain that characterize monsoon season account for more than 90 percent
of the total annual precipitation.
Not exact matches
The work, which covered 1936 - 2010, considered average monthly temperatures and
total monthly
precipitation for the water year (prior October to September) as possible predictors
of annual streamflow.
Northern and western parts
of Alaska had near - average
annual precipitation totals, while the eastern and central parts
of the state were wetter and much wetter than average.
The
annual precipitation total for Alaska is slightly decreasing at an average rate
of 0.03 inch per decade.
There were no significant trends in mean
annual total precipitation or
total precipitation affected area but we did observe a significant increase in mean
annual rain - free days, where the mean number
of dry days increased by 1.31 days per decade and the global area affected by anomalously dry years significantly increased by 1.6 % per decade.
The majority
of models suggest a slight increase in
total average
annual precipitation across the state, largely occurring in spring, particularly in the northwest.
That's actually a small number compared with Antarctica's
total annual ice flow — about 2,000 billion tons a year — most
of which is replenished by
precipitation.
Conversely,
precipitation totals at the higher end
of the spectrum typically only contribute a small amount to the
annual totals.
Precipitation occurs about once every seven days in the western part of the region and once every three days in the southeastern part.77 The 10 rainiest days can contribute as much as 40 % of total precipitation in a given year.77 Generally, annual precipitation increased during the past century (by up to 20 % in some locations), with much of the increase driven by intensification of the heaviest rainfalls.77, 78,79 This tendency towards more intense precipitation events is projected to continue in
Precipitation occurs about once every seven days in the western part
of the region and once every three days in the southeastern part.77 The 10 rainiest days can contribute as much as 40 %
of total precipitation in a given year.77 Generally, annual precipitation increased during the past century (by up to 20 % in some locations), with much of the increase driven by intensification of the heaviest rainfalls.77, 78,79 This tendency towards more intense precipitation events is projected to continue in
precipitation in a given year.77 Generally,
annual precipitation increased during the past century (by up to 20 % in some locations), with much of the increase driven by intensification of the heaviest rainfalls.77, 78,79 This tendency towards more intense precipitation events is projected to continue in
precipitation increased during the past century (by up to 20 % in some locations), with much
of the increase driven by intensification
of the heaviest rainfalls.77, 78,79 This tendency towards more intense
precipitation events is projected to continue in
precipitation events is projected to continue in the future.80
Areas that do not typically receive a large portion
of their
annual precipitation in January saw above normal
totals this month.
Glacier runoff does not increase or decrease the long term runoff for a basin,
total runoff over a period
of several years is determined largely by
annual precipitation.
For this reason, any delay in onset or early truncation
of our rainy season (which typically runs from October through May) can quickly result in diminished
annual precipitation totals; conversely, the occurrence
of just a couple
of additional storm events can lead to well - above
totals for the year.
The results obtained by Donat and his team suggest that both
annual precipitation and extreme
precipitation increased by 1 — 2 % per decade in dry regions, with wet areas showing similar increases in the extent
of extreme
precipitation and smaller increases for
annual totals.
However, the contribution
of very wet days to
total annual precipitation was above normal over Europe, largest along the Norwegian Atlantic coast, around the Baltic States and in southeast Europe.
All
of these characteristics (except for the ocean temperature) have been used in SAR and TAR IPCC (Houghton et al. 1996; 2001) reports for model - data inter-comparison: we considered as tolerable the following intervals for the
annual means
of the following climate characteristics which encompass corresponding empirical estimates: global SAT 13.1 — 14.1 °C (Jones et al. 1999); area
of sea ice in the Northern Hemisphere 6 — 14 mil km2 and in the Southern Hemisphere 6 — 18 mil km2 (Cavalieri et al. 2003);
total precipitation rate 2.45 — 3.05 mm / day (Legates 1995); maximum Atlantic northward heat transport 0.5 — 1.5 PW (Ganachaud and Wunsch 2003); maximum
of North Atlantic meridional overturning stream function 15 — 25 Sv (Talley et al. 2003), volume averaged ocean temperature 3 — 5 °C (Levitus 1982).
Correlation (color) and regression maps (contour)
of SST (left) and SLP (right) associated with the first EOF modes
of annual precipitation (a, b), low - frequency
precipitation (c, d), and
total water storage (e, f), which are calculated using
annual mean data for the first EOF mode
of annual precipitation, 10 - year running mean for
precipitation, and 10 - year running mean leading with 5 - year for
total water storage.
Correlation coefficients are calculated using
annual mean data for the first EOF mode
of annual precipitation, 10 - year running mean data for the low - frequency
precipitation, and 10 - year running mean data leading with 5 - year for the
total water storage.
Mean
annual precipitation has increased by a
total of 8 inches from 1900 to 2013.