Sentences with phrase «less precipitation over»

A radical meteorology theory argues that loss of forest, both in temperate and tropical regions, will lead to less precipitation over land.

A radical meteorology theory argues that loss of forest, both in temperate and tropical regions, will lead to less precipitation over...

Not exact matches

The net change over land accounts for 24 % of the global mean increase in precipitation, a little less than the areal proportion of land (29 %).

Snowfall varies across the region, comprising less than 10 % of total precipitation in the south, to more than half in the north, with as much as two inches of water available in the snowpack at the beginning of spring melt in the northern reaches of the river basins.81 When this amount of snowmelt is combined with heavy rainfall, the resulting flooding can be widespread and catastrophic (see «Cedar Rapids: A Tale of Vulnerability and Response»).82 Historical observations indicate declines in the frequency of high magnitude snowfall years over much of the Midwest, 83 but an increase in lake effect snowfall.61 These divergent trends and their inverse relationships with air temperatures make overall projections of regional impacts of the associated snowmelt extremely difficult.

For the entire Northern Hemisphere, there is evidence of an increase in both storm frequency and intensity during the cold season since 1950,1 with storm tracks having shifted slightly towards the poles.2, 3 Extremely heavy snowstorms increased in number during the last century in northern and eastern parts of the United States, but have been less frequent since 2000.11,15 Total seasonal snowfall has generally decreased in southern and some western areas, 16 increased in the northern Great Plains and Great Lakes region, 16,17 and not changed in other areas, such as the Sierra Nevada, although snow is melting earlier in the year and more precipitation is falling as rain versus snow.18 Very snowy winters have generally been decreasing in frequency in most regions over the last 10 to 20 years, although the Northeast has been seeing a normal number of such winters.19 Heavier - than - normal snowfalls recently observed in the Midwest and Northeast U.S. in some years, with little snow in other years, are consistent with indications of increased blocking (a large scale pressure pattern with little or no movement) of the wintertime circulation of the Northern Hemisphere.5 However, conclusions about trends in blocking have been found to depend on the method of analysis, 6 so the assessment and attribution of trends in blocking remains an active research area.

The absolute humidity will be largely set by the oceans, so water vapor and will increase but relative humidity over land will largely decrease, resulting in less precipitation than one would otherwise expect, given Clausius - Clapeyron and a constant residence time.

The principal scientific objective is to make global SSS measurements over the ice - free oceans with 150 - km spatial resolution, and to achieve a measurement error less than 0.2 (PSS - 78 [practical salinity scale of 1978]-RRB- on a 30 - day time scale, taking into account all sensors and geophysical random errors and biases.Salinity is indeed a key indicator of the strength of the hydrologic cycle because it tracks the differences created by varying evaporation and precipitation, runoff, and ice processes.

The atmospheric warming is the factor that can best explain this consistency, up to ~ 0.7 °C since 1950 and more marked since 1976, while the trend in precipitation is much less homogeneous over this area and is affected by a significant decadal variability.

Over Africa there is an overall reduction in precipitation from 1979 to present in both ERA - Interim and JRA - 55 that is not seen in GPCC, GPCP and is less pronounced in ERA5.

Overlay all of that on a trend of a changing climate, and the data are pretty clear that in the Sierra Nevada, over time, we're going to see more precipitation fall as rain and less as snow.

«Relatively cool waters in the eastern Pacific often result in stubborn summer high - pressure systems over the eastern states that block storms, reducing the frequency of precipitation below normal,» noted study co-author Richard Healy of the Woods Hole Oceanographic Institution, Woods Hole, Mass. «Less frequent storms result in higher surface and atmospheric temperatures that then feedback on the atmospheric circulation to further reduce storm frequency and raise surface temperatures even more.»

«The recent increase in atmospheric methane is due to surface warming of Arctic and mid-latitude wetlands and to a lesser extent increased precipitation over parts of Africa,» added Palmer.

A drought / deluge / drought sigmoid is much less advantageous than equipartition of an equal amount of precipitation over time, in particular if we do not know the lengths of droughts and deluges to expect.

Those who like to check under the hood and kick the tires will find a tiny increase in precipitation over the 240 - year record, with an interesting smoothing of precipitation through the year - that is, there's been a little more rain in the drier December through May half and a little less in the soggier June through November half of the year.

The differences are very small over most regions (less than ± 5 %), except for a small area of the equatorial Pacific Ocean, where the non-high-end models project an increase in precipitation that is about 50 per cent greater than in the high - end models.

Catchy moniker aside, Swain said this «anomalous, extraordinary» ridge was anchored in the northeast Pacific for most of 2013 and the early part of 2014, resulting in much less precipitation than normal for well over a year.