Sentences with phrase «precipitation trends by»

Previous studies on the modification of precipitation trends by quantile mapping have focused on mean quantities, with less attention paid to extremes.

Not exact matches

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.

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.

To assess Montana's historical climate, we evaluated temperature and precipitation trends since the mid-20th century by using standard statistical methods to analyze records of temperature and precipitation.

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

I have read precipitation studies were more difficult due to sparse data, and it seems we would have seen precipitation trend graphs a lot more often by now if it was straight forward.

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.

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.

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:

As you can see, the variability around the trend is largely explained by temperature and precipitation, while there is (near) zero influence on the trend itself...

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.

As researchers documented in this graph, the region had experienced increasing precipitation during the Little Ice Age, followed by a sharp drying trend that began in the late 1700s, which triggered Kilimanjaro's retreat long before CO2 ever reached significant concentrations.

This trend is driven by daily highs and lows, availability of water and heavy precipitation in a single day.

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).

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.

For instance: in support of «temperatures and causality» he cites a paper by Zhang et al on «Detection of human influence on twentieth century precipitation trends».

[ISPM 2.2 a] This is followed by a few examples of inconsistent regional trends, as well as a statement concerning a lack of trend in overall total precipitation.

Puma and his coauthor, Benjamin Cook, a climatologist at Goddard and Columbia's Lamont - Doherty Earth Observatory, are the first to look at the historic effects of mass watering on climate globally by analyzing temperature, precipitation and irrigation trends in a series of model simulations for the last century.

A study by the Climate Service Center Germany (GERICS) discovered, according to Phys.org, that «precipitation in Germany has increased by 11 percent since 1881 — and according to the forecasts, this trend is set to continue.

Singh and her Lamont colleagues research climate change impacts on weather patterns by analyzing weather trends in daily temperatures, precipitation, and atmospheric patterns that have occurred during the past 40 years, in the post-satellite era.

«The recent trends in winter precipitation have been accompanied by respective trends in sunshine (significant increase in all subregions of 17 to 29 %)»

We find that the reported discrepancy can be traced to two main issues: (1) unforced internal climate variability strongly affects local wetness and dryness trends and can obscure underlying agreement with WWDD, and (2) dry land regions are not constrained to become drier by enhanced moisture divergence since evaporation can not exceed precipitation over multiannual time scales.

A 2015 study found that warm conditions induced by human - caused global warming have already increased the risk of severe drought in California, even in the absence of trends in precipitation.

«Our analysis is the first to bridge these gaps for a large range of impacts, by assessing the role of human - related emissions in each impact individually, including impacts related to trends in precipitation and sea ice.»

b Trends surface temperature from the GOGA CAM3 simulations (background colorscale; air temperature over sea ice and SST elsewhere) along with the Z850 trend produced by the model simulations (black contours; negative dashed and positive solid; interval of 3 m / decade) and the simulated convective precipitation trends (positive green contours, negative red contours, contoured at − 0.7, − 0.3, − 0.1, 0.1, 0.3, and 0.7 mm / day / decade, shown only for 45 ° S — 45 ° N. (c) As in (b) but for the TOGA CAM3 simulations.

Indeed, our results show that even in the absence of trends in mean precipitation — or trends in the occurrence of extremely low - precipitation events — the risk of severe drought in California has already increased due to extremely warm conditions induced by anthropogenic global warming.

Scientists also factored long - term, climate change trends into the three - month seasonal outlook by looking at the last 10 to 15 years of temperature and precipitation across the country.

The increasing humidity trend below the troposphere might be compensated by increase in convection and precipitation.