Sentences with phrase «precipitation trends in»

Statistics Canada — EnviroStats: Precipitation trends in Canada: 1, 2 — Jeff Fritzsche — Yes, folks, some charts.

An analysis of extreme precipitation trends in Europe during the 20th century has identified a wetting trend over central and western Europe from 1921 to 1999.

The model, forced with observed SSTs, generally reproduces the observed pattern of precipitation trends in the central and western tropical Pacific, with increases in convective precipitation of up to 0.8 mm / day / decade.

Note that the sign of precipitation trends in areas most directly impacted by the NAO such as southern Europe and the west coasts of Norway, the U.K. and Iceland, remains uncertain even for the next 50 years (Fig. 10d) consistent with the results shown in Figs.

These mismatches are responsible for a large part of the misrepresentation of precipitation trends in climate models.

Adaptation to climate change and variability: farmer responses to intra-seasonal precipitation trends in South Africa.

Future precipitation trends in both areas aren't as clear, though there are indications that rain will come in more intense, episodic bursts, leaving more time between them for trees to experience drought stress.

Not exact matches

«The winter discharge of the Tanana River has increased since the record keeping began in the»70s, but there are no increasing trends in precipitation,» she said.

Annual precipitation in the region is trending upward, but drought trends are unclear, according to the agency.

The methodology developed in Lovejoy's two recent papers could also be used by researchers to help analyze precipitation trends and regional climate variability and to develop new stochastic methods of climate forecasting, he adds.

Recent Forest Service studies on high - elevation climate trends in the Pacific Northwest United States show that streamflow declines tie directly to decreases and changes in winter winds that bring precipitation across the region.

Local and regional precipitation trends are nearly as important as temperature in determining the fate of many animals, he explained, and that's especially true with moisture - sensitive creatures such as amphibians.

At the top the trend in annual measured precipitation between 1951 and 2010 is shown from the last scientific report of the Intergovernmental Panel on Climate Change (IPCC).

The models, which factor in natural effects such as solar winds and volcanic eruptions, along with anthropogenic forcings like greenhouse gases and aerosols, match these precipitation variations accurately in trend and reasonably well in magnitude.

And lastly, although the models get the precipitation trends spot - on, they «significantly underestimate the magnitude of change [in rainfall],» Hegerl admits, explaining that better modeling is near the top of the agenda for the researchers.

In terms of precipitation, a decrease was observed in annual precipitation over the period as a whole, although these trends «are not significant.&raquIn terms of precipitation, a decrease was observed in annual precipitation over the period as a whole, although these trends «are not significant.&raquin annual precipitation over the period as a whole, although these trends «are not significant.»

The predictions matched actual rainfall measurements during the 75 - year period, both in the magnitude (amount) and the trend (increase or decrease) of precipitation.

In addition to global evapotranspiration trends, they examined vegetation greenness and general climate data including temperature, precipitation and cloudiness.

Weather data from that era, including trends in precipitation, suggest that glaciers in the area should have been expanding, or at least holding their ground.

«Our study has found evidence to the contrary, suggesting that in fact, the future long - term trend based on paleoclimate reconstructions is likely towards diminishing precipitation, with no relief in the form of increased Mediterranean storms, the primary source of annual precipitation to the region, in the foreseeable future.»

«According to climate predictions, annual precipitation is likely to decrease in the Southwest but increase in the eastern United States during the 21st century, therefore, the observed diverse trends of surface water body areas since 1984 could continue to occur in the future,» said Xiao.

A new study shows that predicting temperature and precipitation trends three to four weeks in advance is possible.

If we can identify what the dominant controls on those thresholds are climatically, we may be able to assess whether trends in temperature are more relevant than those for precipitation.»

In virtually all states with stations below 2,000 feet, the data show a trend toward a higher percentage of rain during the winter precipitation season.

Increases have also been reported for rarer precipitation events (1 in 50 year return period), but only a few regions have sufficient data to assess such trends reliably.

With flooding in parts of the Mississippi Valley and a strong Pacific storm coming into the Northwest, we examined the trend in the number of days each year with heavy precipitation at 244 individual sites in the U.S..

However, there has been a general trend of decreasing winter precipitation from 1950 to present; this pattern is most evident in the northwest and central portions of the state and may be due to increased frequency of El Niño events (see Climate chapter).

Seasonal decreases in land precipitation since the 1950s are the main cause for some of the drying trends, although large surface warming during the last two to three decades has also likely contributed to the drying.

Global climate projections from the Intergovernmental Panel on Climate Change, showing temperature and precipitation trends for two different future scenarios, as described in the Climate chapter of this assessment (IPCC 2014a).

-- Along with analyzing historical trends in temperature and precipitation, we performed an analysis of changes in extreme climate events since the middle of last century.

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.

Given that the long - term trend in early spring snowpack is down, Climate Central recently examined how the type of precipitation is changing during the winter months nationwide.

«The rising risk results from decreases in precipitation, based on 16 leading climate models, and increases in water demand, based on current growth trends.

The very increase in absolute humidity that reinforced the warming trend through infrared absorption might lead to increased cloudiness (or indeed to increased precipitation and winter snow cover) and thus, through reflection of insolation, to a considerable buffering of the warming trend.

Even the admirable Revkin doesn't get it quite right: On horizontal surfaces, observations and modeling show a role for melting in both the baseline ablation and the sensitivity of ablation to precipitation and temperature; melting is the dominant ablation mechanism on vertical ice cliffs; and though Kaser et al find «no evidence» about rising temperatures, it is only because the in situ studies don't cover a long enough period to detect trends.

> GHCN - Monthly is used operationally by NCDC to monitor long - term trends in temperature and precipitation....

«The major trends over time are a wintertime WVP and LWP increase south and southwest of Greenland also seen in precipitation, consistent with modification of continental air flowing out over increasingly warmer waters.

The aspect of the paper that has attracted the most attention is the claim that the retreat of the Kilimanjaro summit glaciers can be explained by precipitation reduction, without any compelling need to invoke a warming trend in local air temperature.

The result is that there is no difference in regional cloud cover trends, neither of precipitation, with increasing contamination and that the contaminated area has more dimming, but warmed more than the less contaminated area.

For example, nearly all recent model intercomparisons show that AOGCMs poorly reproduce precipitation in 30 ° S - 30 ° N, they still diverge for cloud cover evolution at different levels of the vertical column, and I don't clearly understand for my part how we can speculate on long term trends of tropospheric T without a good understanding of these convection - condensation - precipitation process.

Although there is still some disagreement in the preliminary results (eg the description of polar ice caps), a lot of things appear to be quite robust as the climate models for instance indicate consistent patterns of surface warming and rainfall trends: the models tend to agree on a stronger warming in the Arctic and stronger precipitation changes in the Topics (see crude examples for the SRES A1b scenarios given in Figures 1 & 2; Note, the degrees of freedom varies with latitude, so that the uncertainty of these estimates are greater near the poles).

Averaging smoothes out day - to - day and year - to - year natural weather variability and extremes, removing much of the chaotic behavior, revealing any underlying long term trends in climate, such as a long term increase or decrease in temperature, or long term shifts in precipitation patterns.

I should add too that I was not allowed at work to study or talk about trends in frequency and magnitude of floods or trends in temperatures and precipitation, due to the «highly political and controversial subject of global warming».

«Century of Data Shows Intensification of Water Cycle but No Increase in Storms or Floods Released: 3/15/2006 12:13:21 PM» (excerpt) A review of the findings from more than 100 peer - reviewed studies shows that although many aspects of the global water cycle have intensified, including precipitation and evaporation, this trend has not consistently resulted in an increase in the frequency or intensity of tropical storms or floods over the past century.

This paper briefly reviews the current state of science regarding historical trends in hydrologic variables, including precipitation, runoff, tropospheric water vapor, soil moisture, glacier mass balance, evaporation, evapotranspiration, and growing season length.

There have also been some reports on trends of more extreme precipitation, although The International Ad Hoc Detection and Attribution Group (IDAG, 2005) did not manage to attribute trends in precipitation to anthropogenic greenhouse gases (G)-- a quote from their review article is: «For diurnal temperature range (DTR) and precipitation, detection is not achieved», here «detection» implying the signal of G.

We do know that there are trends in temperature extremes and precipitation extremes (which are backed solidly by physics in a warming climate), but for the other metrics we don't really see trends at all.

The water vapor feedback (a generally positive feedback)-- there is an roughly exponential increase in saturation water vapor pressure with increasing temperature, and the relative humidity (at a given vertical level) overall tends not to change a lot globally, though there will be different regional trends associated with shifting precipitation patterns.

The argument here goes that man - made climate change has not played «any appreciable role in the current California drought», because there is no trend in average precipitation.

At the tail end of the full paper, capping a paragraph about a weak spot in the analysis — that the observed trend in extreme precipitation events exceeds what is produced by various climate models — comes a sentence about uncertainties: