Sentences with phrase «year variability»

Monthly sea ice data show trends of increasing sea ice extent that are slightly above the mean year - to - year variability over the satellite record (1979 to present).

In addition, year - to - year variability increased at some locations because of greater yield reductions in warmer years and lesser reductions in cooler years.

These shifts taken individually and together account for the year - to - year variability seen in the global average temperatures.

[28] Large year - to - year variability makes value - added hard to interpret.

There is year - to - year variability about these trends, but on average, annual nuisance flood frequencies have been dramatically increasing.

Similarly, there is no 11 or 22 year variability visible in the carbon dioxide data either, which would be necessary for solar cycles to be driving carbon dioxide levels.

Year to year variability of food production will become greater, which will make global food markets more unpredictable.

The remainder is due to year - to - year variability in temperatures.

After the station moved, between 1974 - 2004 Walpole temperatures averaged 2.89 + / - 1.29 F warmer than Medway, but with similar year - to - year variability ranging between 1.5 cooler one year to 4.5 warmer another.

For instance, scientists are learning how El Niño affects the year - to - year variability for fire seasons in the western United States, Amazon and Indonesia.

The model reproduces large year - to - year variability under both cooling and warming conditions.

Beyond year - to - year variability such as El Niño there are decade - to - decade changes, such as the Interdecadal Pacific Oscillation, which has been shown to have a marked impact on global temperature rise.

After the station moved, between 1974 - 2004 Walpole temperatures averaged 2.89 + / - 1.29 F warmer than Medway, but with similar year - to - year variability ranging

It was well known — and in fact had been demonstrated most recently in an article in Nature — that, while el nino, along with volcanic eruptions, did explain a fair amoount of the short - term year - to - year variability in global temperatures, it could not accouny for the warming trend., Had McLean et al somehow discovered something that had eluded the entire research community fir decades?

Variables explaining a significant component of yield variance are nitrogen, irrigation water, and precipitation; temperature was a less significant component of yield variation within the range of observed year - to - year variability at the study sites.

And long - term forecasts for the region's temperature and rainfall currently show less change than normal year - to - year variability.

But year - to - year variability has been high.

Our results demonstrate that the European summer climate might experience a pronounced increase in year - to - year variability in response to greenhouse - gas forcing, the scientists write.

«A lot of the year - to - year variability is for all practical purposes random and unpredictable,» said Sobel, who also directs a new Columbia University Initiative on Extreme Weather and Climate.

A decrease in precipitation frequency translates into even more year - to - year variability in fresh water resources for the Southwest.

«However, this might just be an extreme case of pushing the envelope of year - to - year variability.

«There's a lot of year - to - year variability in both Arctic and Antarctic sea ice, but overall, until last year, the trends in the Antarctic for every single month were toward more sea ice,» said Claire Parkinson, a senior sea ice researcher at Goddard.

The groundbreaking study revealed that, globally, the year - to - year variability of the land carbon balance — the exchange of carbon that takes place between the land biosphere and the atmosphere — responds most significantly to changes in temperature.

The team found that, locally, water availability provides the most dominant cause of the year - to - year variability of both CO2 uptake in plants by photosynthesis, and CO2 release from plants and microbes respiration.

The article could have said that we know with certainty that natural climate cycles can not account for the long - term temperature trends we've witnessed, but that these cycles do account for a great deal of year - to - year variability?

However, as these are areas with large year - to - year variability, the most evident warming signal has occurred in parts of the middle and lower latitudes, particularly the tropical oceans.

We know that the magnitude of year - to - year variability of sea ice in Antarctica is very high compared to the long term trend [Fig 1].

According to George Leskevich, a physical research scientist with the Great Lakes Environmental Research Laboratory in Ann Arbor, Mich., there is also a long - term downward trend in Great Lakes wintertime ice cover, although there is considerable year - to - year variability.

The climate information in particular is tricky to work with in such snapshot comparisons because it can fall prey to the ups and downs of natural year - to - year variability, Doney said.

Beyond year - to - year variability, changes appear to be afoot for the tornado season.

Can we disprove the hypothesis that this year - to - year variability is just random and we'll never be able to predict it?

El Niño is one of the biggest drivers of year - to - year variability, increasing the likelihood of warm weather in the Pacific Northwest and cooler weather in the Southeast as well as a host of other global impacts.

Despite large year - to - year variability of temperature, decadal averages reveal isotherms (lines of a given average temperature) moving poleward at a typical rate of the order of 100 km / decade in the past three decades [101], although the range shifts for specific species follow more complex patterns [102].

Precipitation is projected to increase, primarily in spring (0.2 - 0.7 inches [0.5 - 1.8 cm]-RRB- in the northwest; a slight statewide decrease in summer precipitation and increased year - to - year variability of precipitation are projected, as well.

The report concluded: «We intend to conduct further, more sensitive, analysis when student level data for prior attainment, free school meal eligibility and the deprivation index become available to better understand whether these systematic factors are associated with year - on - year variability.»

Research and past experience suggests that teachers should be prepared for greater year - to - year variability in their value - added ranking for a few years after the change when districts use both old and new tests for value - added calculations.

To be confident that the test results aren't pulled up or down by a few students and to minimize year - to - year variability, states usually consider only groups of at least 30 or 40 students.

They should also be prepared for greater year - to - year variability in value - added for a few years after the change when they will be using both old and new tests.

The aspects of the reconstruction that show skill (in this case the long term mean, but not the year to year variability) are things that are worth pursuing.