Sentences with phrase «precipitation anomalies»

In contrast, there is no statistically significant difference in the probability of a — 1.5 SD precipitation anomaly for winter.

As is typical, precipitation anomalies varied significantly around the world.

Top row: Annual European precipitation anomalies from 1979 to 2017, relative to the annual average for the period 1981 - 2010.

As is typical, precipitation anomalies vary significantly around the world.

The AMO has been linked to multi-year precipitation anomalies over North America, and appears to modulate ENSO teleconnections (Enfield et al., 2001; McCabe et al., 2004; Shabbar and Skinner, 2004).

We find that although there has not been a substantial change in the probability of either negative or moderately negative precipitation anomalies in recent decades, the occurrence of drought years has been greater in the past two decades than in the preceding century.

The first study explored the temporal evolution of atmospheric circulation and US precipitation anomalies during multi-year La Niña events.

Time series of January - November precipitation anomalies in California from the historical record.

(Bottom) Time series of annual global land precipitation anomalies with respect to the 1961 to 1990 base period for 1900 to 2005.

Seasonal European precipitation anomalies for spring 1979 to autumn 2017 relative to the respective seasonal average for the period 1981 - 2010.

Vector wind analyses were computed to explain the composite seasonal precipitation anomaly results in terms of different circulation patterns associated with these two wet groups.

However, the Historical experiment exhibits greater probability of a — 0.5 SD precipitation anomaly co-occurring with a positive temperature anomaly (0.001 significance level)(Fig. 3D), suggesting that human forcing has caused the observed increase in probability that moderately dry precipitation years are also warm.

This increase implies a transition to a permanent condition of ∼ 100 % risk that any negative — or extremely negative — 12 - mo precipitation anomaly is also extremely warm.

The AMO has been linked to multi-year precipitation anomalies over North America, and appears to modulate ENSO teleconnections (Enfield et al., 2001; McCabe et al., 2004; Shabbar and Skinner, 2004).

Figure 2, at right: Spatial extent and magnitude of precipitation anomalies for 1932 - 1939.

Analysis showed that the AMV warming drives a modification of the Walker Circulation that creates precipitation anomalies over the whole tropical belt.

The four driest periods in this relatively arid region — these periods bear the deadpan scientific label of negative Sahelian precipitation anomalies — were in 1913, 1972, 1983 and 1984.

As is typical, August precipitation anomalies varied significantly around the world.

The greatest precipitation anomalies were also seen in the Interior; Fairbanks recorded 1.78 in (45 mm) precipitation for the month, 266 % of normal and the 5th wettest November since records began in 1929.

The NAO - Bermuda High relationship is still largely a mystery, but it might be related to springtime precipitation anomalies over eastern North America and western Europe leading to greater high latitude ridging during summer and thus a stronger and more persistent subtropical Bermuda High.

2013 year - to - date precipitation anomalies.

Anomalies are shown in a globally complete Robinson projection, and in polar stereographic projections for the northern and southern hemispheres that do not encompass the regions of the deep tropics where precipitation anomalies are most uncertain.

When averaging over the whole domain, the annually averaged precipitation anomaly is small at -0.02 mm / day, just slightly below average.

It remains uncertain what role Atlantic SST anomalies play in generating the low - frequency Pacific wind response and the simulated North American precipitation anomalies in CTL.

In addition, the probability of a — 1.5 SD precipitation anomaly increases in spring (P < 0.001) and autumn (P = 0.01) in 2006 — 2080 relative to 1920 — 2005, with spring occurrence increasing by ∼ 75 % and autumn occurrence increasing by ∼ 44 % — which represents a substantial and statistically significant increase in the risk of extremely low - precipitation events at both margins of California's wet season.

P values are shown for the difference in occurrence of — 1.5 SD precipitation anomalies between the Historical period (1920 — 2005) and the RCP8.5 period (2006 — 2080).

Most 1 - SD drought years have occurred when conditions were both dry (precipitation anomaly < 0) and warm (temperature anomaly > 0), including 15 of 20 1 - SD drought years during 1896 — 2014 (Fig. 2A and Fig.

The associated precipitation anomalies include above - average totals in the Gulf of Alaska extending into the Pacific Northwestern United States, and below - average totals over the upper Midwestern United States.

Forecasted precipitation anomalies (mm / day; shading) from 8 — 12 May 2018.

Figure 3, above: Regional time series of boreal summer (JJA) irrigation, ensemble - mean temperature anomalies, and ensemble - mean precipitation anomalies for Western North America (130 ° W - 100 ° W, 30 ° N - 50 ° N), India (68 ° E-88 ° E, 8 ° N -36 ° N), and China (98 ° E-122 ° E, 22 ° N - 42 ° N).

As is typical, precipitation anomalies during June 2013 varied significantly around the world.

The probability that a negative precipitation anomaly co-occurs with a positive temperature anomaly has increased recently, with warm — dry years occurring more than twice as often in the past two decades (91 %) as in the preceding century (42 %)(Fig. 1B).

In addition, the number of multiyear periods in which a — 0.5 SD precipitation anomaly co-occurs with a 0.5 SD temperature anomaly more than doubles between the Historical and RCP8.5 experiments (Fig. 4A).

(B) The probability that a negative 12 - mo precipitation anomaly and a positive 12 - mo temperature anomaly equal to or exceeding a given magnitude occur in the same August — July 12 - mo period, for varying severity of anomalies.

Tree - ring records of precipitation anomalies and of temperature allowed them to reconstruct a 500 - year history of snow water equivalent in the Sierra Nevada.

Bottom row: Annual precipitation anomaly for 2017 relative to the annual average for the period 1981 - 2010.

The higher resolution of E-OBS shows a large positive precipitation anomaly over the Alps and the satellite soil moisture product shows above average soil moisture for a larger region than ERA - Interim.

A multi-model simulation study shows that Atlantic Multidecadal Variability warming drives a modification of the Walker Circulation that creates precipitation anomalies over the whole tropical belt.

They simulated the impact of continued global warming into the future and found that — provided there was no geoengineering — only 11 of the 50 years between 2020 and 2070 would have negative Sahelian precipitation anomalies.

In contrast, although the Historical experiment exhibits a slightly higher mean annual precipitation (0.023 significance level), there is no statistically significant difference in probability of a — 0.5 SD precipitation anomaly (Fig. 3 A and C).

Precipitation anomaly for winter, spring, summer and autumn 2017 relative to the respective seasonal average for the period 1981 - 2010.

With regard to precipitation anomalies in summer, ERA - Interim shows above average rainfall for Greece and the west of Turkey, whereas E-OBS indicates that these areas are below average.

Precipitation anomalies have been stronger and covered larger areas in some earlier centuries than during the twentieth century,» according to Fredrik Charpentier Ljungqvist, historian and climate researcher at Stockholm University and lead author of this study.

As is typical, precipitation anomalies during June 2014 — August 2014 varied significantly around the world.

As is typical, precipitation anomalies during September — November 2015 varied significantly around the world.

As is typical, precipitation anomalies during December 2015 varied significantly around the world.