Sentences with phrase «trend over the last century»

Knutti et al. (2002) also determine that strongly negative aerosol forcing, as has been suggested by several observational studies (Anderson et al., 2003), is incompatible with the observed warming trend over the last century (Section 9.2.1.2 and Table 9.1).

The long - term warming trend over the last century has been well - established.

Secondly, I expect that the changes in instrumentation, inaccuracy of a single Secchi - depth - to - chlorophyll conversion, and variation in sampling effort prevent identification of trends over the last century.

Astute readers will object and complain that there must have been some sea level trends over the last century.

In other words, we do not actually know if there has been any significant sea level trends over the last century!

Still dead on when looking at the land warming trends over the last century.

«Our study shows that the rapid rise in west Greenland melt is a combination of specific weather patterns and an additional long - term warming trend over the last century.»

While the warming trends over the last century for Australia as a whole are slightly stronger in the ACORN - SAT dataset than they are in the AWAP dataset, this is not necessarily true for all the States and Territories taken as separate geographic regions.

While there are areas, such as the extra-tropical Pacific and North Atlantic Ocean, where the GFDL model warms significantly more than has been observed, the anthropogenic climate change simulations do provide a plausible explanation of temperature trends over the last century over large areas of the globe.

But the trend over the last century is about the same, and the trend over the last decennia is almost exactly the same.

Not exact matches

Clearly, over the last century retail has changed a lot, but if you analyze the trends, success comes down to three factors: Convenience, spontaneity and experience.

I used smoothed silver prices over the last century to filter out short term fluctuations to highlight the basic trend of silver prices.

But trends in rationalism and scientism over the last two centuries turned it into a «value - free» social science» to some, just a form of applied mathematics.

Twentieth - Century Catholic Theologians: From Chenu to Ratzinger by fergus kerr blackwell, 240 pages, $ 29.95 Over the last decade, a Scottish Dominican named Fergus Kerr has produced a series of books designed to orient readers to contemporary trends.

once more: look at the data and then deduce your own hypothesis to explain the glaringly sharp spike on the right side of the x / y chart which plots global temperature trends over the last 2 centuries.

Dr. Stephen Vermette, a SUNY Buffalo State climatologist and geography professor, recently analyzed data on climate trends in Western New York over the last half - century.

There's a historic trend in that direction based on observations over the last century or more.

In the following sections we highlight trends in fungicide development and use over the last century in light of the ever - changing spectra and intensities of fungal pathogens, which have often occurred as a consequence of changing cropping systems.

While the nation's weather in individual years or even for periods of years has been hotter or cooler and drier or wetter than in other periods, the new study shows that over the last century there has been no trend in one direction or another.

In the paper Retreating Glacier Fronts on the Antarctic Peninsula over the Past Half - Century published this week in Science, we presented new data describing trends in 244 marine glacier fronts on the Antarctic Peninsula over the last 50 years.

The findings suggest that Antarctic sea ice has fluctuated substantially through the last century, rather than experiencing the sort of steady trend seen in the Arctic over many decades.

California, New York and Texas, all states that have been profoundly altered by immigration trends over the last half - century, are among the most segregated states for Latino students along multiple dimensions.

The analysis focuses on the ELA components of the standards, but what it says about the assumptions driving them and how they were constructed is important: «The blanket condemnation made by the CCSS authors that school reading texts have «trended downward over the last half century» is inaccurate» — particularly so, the authors of the study found, in the K - 3 grades.

In celebrations of its 25th year, this year's show will host a series of seminar sessions looking back on the tourism revolution in the MENA region over the last quarter of a century, while exploring how the industry will shape up over the next 25 years, in light of geopolitical tensions, economic uncertainties, huge technological advances and, of course, the increasing trend of responsible tourism.

While periods of increased and decreased warming exist over the 132 - year period, the linear rate is still ~ 0.6 C / century, and the most recent monthly GISS values fall right on the linear trend (the linear trend value for the Feb. 2012 temperature anomaly is +0.38 C, while the last two months have been +0.35 and +0.40 C.)

Our examination does suggest that a slight modification to the original Mann et al. reconstruction is justfiable for the first half of the 15th century (∼ +0.05 — 0.10 º), which leaves entirely unaltered the primary conclusion of Mann et al. (as well as many other reconstructions) that both the 20th century upward trend and high late - 20th century hemispheric surface temperatures are anomalous over at least the last 600 years.

There are quite a few reasons to believe that the surface temperature record — which shows a warming of approximately 0.6 ° -0.8 °C over the last century (depending on precisely how the warming trend is defined)-- is essentially uncontaminated by the effects of urban growth and the Urban Heat Island (UHI) effect.

An INTAS - funded research project has been initiated to study the possible trends in snow cover during the last century over Northern Eurasia and the relation between snow cover variability and variations in atmospheric circulation patterns.

There was in fact no longer much evidence that CO2 emissions were the cause of the warming trend over the last 20 or so years of the 20th Century......... causality always implies correlation.»

Further, let's agree that this will on average cause more precipitation due to increased evaporation at these higher temperatures (the best data I have seen say that the precipitation trend over the continental US — where we have the best long term records — is up 5 - 10 % over the last century).

The 0.1 percent shift in TSI simply isn't enough to have a strong influence, and there's no convincing evidence that suggests TSI has trended upward enough over the last century to affect climate.»

It presents a significant reinterpretation of the region's recent climate change origins, showing that atmospheric conditions have changed substantially over the last century, that these changes are not likely related to historical anthropogenic and natural radiative forcing, and that dynamical mechanisms of interannual and multidecadal temperature variability can also apply to observed century - long trends.

When using longer datasets in the northern hemisphere such as US landfalls over the past century, no trend emerges in the second half of last century.

Let's agree, for the sake of argument, that we have been in a significant warming trend over at least the last quarter of a century, and even that this is largely anthropogenically caused.

To the first point, since human ability to predict and / or respond to disasters of all types has improved massively over the last century, considering mortality per se doesn't say anything at all about the trends of occurrence of those disasters.

But, he also says: «teams offering projections say ice extent will remain well below the average for the last quarter century and a downward trend in summer ice around the North Pole has not abated,» and we readers are then linked to his October, 2007 article and an August, 2007 image of a «warmed over» Artic.

Even if their data analysis is excluded, it does not alter the findings that were reported in the 2007 I.P.C.C. report with respect to the surface temperature trends, since these other analyses provide a redundant check of their analyses over the last century.

«The global temperature has been rising at a steady trend rate of 0.5 °C per century since the end of the little ice age in the 1700s (when the Thames River would freeze over every winter; the last time it froze over was 1804)...

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.

While the nation's weather in individual years or even for periods of years has been hotter or cooler and drier or wetter than in other periods, the new study shows that over the last century there has been no trend in one direction or another.

This is because, from the discussion above, we would expect to see sea level changes, since global temperatures do seem to have changed over the last century (whether the temperature trends are man - made or natural in origin).

«The adjustments make no significant difference to the obvious upward trend in global average temperature over the last century,» he said.

«Still, the vanishing upward trend over the last 250 years questions the existence of a modern «Grand Maximum» in the 20th century (Solanki et al. 2004, Abreu et al. 2008, Usoskin et al. 2012, 2014), which resulted primarily from the erroneous transition between Wolf and Wolfer in the Hoyt and Schatten GN time series.

Pekka, Humlum heresy etc Point of Information: Ignoring for the moment the various explanations offered, is it or is it not the case that CO2 (from whatever source) lags temperature trends by ~ 10 months over the last century or so?

HadCRUT is the IPCC's gold - standard for measuring global temperatures - over last 15 years (180 months) the globe has cooled with a -0.24 C per century trend, not warmed as predicted

Over the last 30 years, a period commonly thought to be long enough to be considered a climate trend, GISSTEMP indicates a warming of 1.6 C / century.

So far we have about a degree which is a five - standard - deviation departure over the last century or so, and counter to the Milankovitch millennial trend, also 20 times faster.

This slideshow shows how well models predict past temperature trends, and the extent to which human activity was the primary cause of warming over the last century.

Objectively, the small trend increase of +0.40 degrees per century over the last 25 years is well within known natural variation.

Following a warming trend early in the 20th century and mid-century cooling, surface air temperatures in the Arctic have shown a strong increase over the last few decades, warming at about twice the global average.