Sentences with phrase «century warming trend»

The hearing featured Dr. Willie Soon, an astrophysicist at the Harvard - Smithsonian Center for Astrophysics and a co-author of a study, with Dr. Sallie Baliunas, also an astrophysicist at the center, that said the 20th - century warming trend was unremarkable compared with other climate shifts over the last 1,000 years.

Nearly half of the 20th century warming trend occurred from 1910 to 1945, but CO2 emissions didn't increase enough to explain most of the warming.

=== > that's equal to a 96 °C per century warming trend if NASA continues with a pattern of similar «corrections.»

It seems fairly obvious that continuation of a 20th Century warming trend is not seen as supportive of CAGW hypothesis, and what is * needed * is a significant increase in the rate of global warming.

Per the IPCC's gold - standard of global temperature measurements, since the late 1800s, the highest per century warming trend achieved occurred during the 42 - year period ending in 1949.

If you like the late 20th century warming trend is like the curved ramp at the end of British aircraft carriers.

Since those earliest temperatures are merely modeled from data presumably collected elsewhere, early temperatures are susceptible to the «modeling whim du jour» and in this case the 2015 model had created a steeper 20th century warming trend in just 2 years.

If you mean the «late 20th century warming trend» (1951 to 2000), I'd agree that a part of this warming may well have been due to GHGs.

Based on this formula, it's closer to 40 years to distinguish a 2 °C / century from a 1 °C / century warming trend at the 95 % CL.

The 20th century warming trend is not a linear affair.

Diurnal temperature variation exceeds the 0.74 C twentieth century warming trend by orders of magnitude, but these variations obviously even out over long intervals.

The suggested synchroneity of tropical and North Atlantic centennial to millennial variability (de Menocal et al., 2000; Mayewski et al., 2004; Y.J. Wang et al., 2005) is not common to the SH (Masson et al., 2000; Holmgren et al., 2003), suggesting that millennial scale variability can not account for the observed 20th - century warming trend.

If one uses the midpoint of that earlier variation to define the start of the 20th century warming trend, one starts at a date closer to 1920, and knocks a full 0.1 + C off the early century warming.

But our main point does not depend on that and is robust: with any model and any reasonable data - derived forcing, the observed 20th Century warming trend can only be explained by anthropogenic greenhouse gases, while other factors can explain the shorter - term variations around this trend.

But our main point does not depend on that and is robust: with any model and any reasonable data - derived forcing, the observed 20th Century warming trend can only be explained by anthropogenic greenhouse gases, while other factors can explain the shorter - term variations around this trend.

e they show greater than 5degC / century warming trends over the 1970 to 2010 CWP.

Yet, as this charts reveals, the per century warming trends are remarkably similar with the fastest warming acceleration happening in the earlier period.

Not exact matches

This century has seen an acceleration of global - warming trends, as well as an extreme widening of the gap between the world's richest and its poorest.

«West Greenland Ice Sheet melting at the fastest rate in centuries: Weather patterns and summer warming trend combine to drive dramatic ice loss.»

Because of the strong recent warming, the updated trend over 1906 to 2005 is now 0.74 ± 0.18 degree C. Note that the 1956 to 2005 trend alone is 0.65 ± 0.15 degree C, emphasizing that the majority of 20th - century warming occurred in the past 50 years.

The cooling trend was reversed during the 20th century, with four of the five warmest decades of our 2000 - year - long reconstruction occurring between 1950 and 2000.

Now, one year doesn't make a trend, but this does — 14 of the 15 warmest years on record have all fallen in the first 15 years of this century.»

The epicenter of agricultural production has moved north and west over the past half - century, and that trend will likely continue at an accelerated pace due to global warming, a new study finds.

Indeed, the dampened late 20th century winter warming over a substantial part of Greenland, particularly the western and southern regions emphasized by the network of stations analyzed by Vinther et al, is known (see e.g. this NOAA page) to be associated with a trend toward the positive phase of the Arctic Oscillation («AO») pattern.

Furthermore, the warming trend is all but certain to continue throughout the coming century and beyond.

Once again, surface warming variability diminishes even further in the late 20th century simulations, and once again these late 20th century simulations are much closer to the observed trends of sea surface warming, than the control and early 20th century simulations.

Incidentally, as I see it, your reconstruction of Manns data showing the 15th century to be warmer than now is even more damming than Manns original construct, as it indicates a gradual decline in global temperatures until 1850, before human influence reversed that trend.

The Sun's slightly variable output accounts for some of earth's temperature fluctuations, but the steady warming trend, seen over centuries, will probably continue for surprising reasons.

Past analyses have found ENSO was responsible for 15 to 30 % of interseasonal variability but little of the global warming trend over the past half century (Jones 1989, Wigley 2000, Santer 2001, Trenberth 2002, Thompson 2008).

But clear warming trends are present in the early and late 20th century.

Using that relationship for 2016 predicts a warming above the long - term trend of 0.14 degrees Celsius and, when the short - and long - term predictions are combined, gives 1.16 degrees Celsius (plus or minus 0.13 degrees Celsius, with 95 percent confidence) net warming above the late - 19th century baseline.

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).

A new study from The Auk: Ornithological Advances uses European House Sparrows, which have spread into a variety of climates in Australia and New Zealand since their introduction in the mid-19th century, to show that this trend in birds might actually be due to the effects of high temperatures during development — raising new alarms about how populations might be affected by global warming.

Increasing abundances of tropical / subtropical species throughout the 20th century reflect a warming trend superimposed on decadal - scale fluctuations.

My point, however, is that neither the trend data, nor the underlying theory give any support for the (90 %) certainty that most of the warming during the last century was anthropogenic.

Their views of sea trends through this century still vary widely, while they agree, almost to a person, that centuries of eroding ice and rising seas are nearly a sure thing in a warming world.

The rate of warming «has not changed since 1880» and «is still ~ 0.6 C / century» because you've chosen to plot a linear trend through the data and that's the slope of it.

* However, the same panel then concluded that «the warming trend in global - mean surface temperature observations during the past 20 years is undoubtedly real and is substantially greater than the average rate of warming during the twentieth century.

1930s A global warming trend since the late nineteenth century is reported.

There is in fact NO evidence of a long term warming trend during the 20th Century.

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.)

Re Fred Staples: «My point, however, is that neither the trend data, nor the underlying theory give any support for the (90 %) certainty that most of the warming during the last century was anthropogenic.»

Global warming occurred both at the beginning and at the end of the 20th century, but a cooling trend is seen from about 1940 to 1975.

If 12 years of flat trend and 8 years of negative trend are not inconsitent with models, predicting 3 degrees C of warming on century scale, what is?

Demonstrate that warming in the past tells us that warming will continue into the future, despite the fact that a very similar trend in the opposite direction during the middle of the 20th century convinced so many that we were headed for another ice age.

Global warming does not mean no winter, it means winter start later, summer hotter, as Gary Peters said «The global average surface temperature has risen between 0.6 °C and 0.7 °C since the start of the twentieth century, and the rate of increase since 1976 has been approximately three times faster than the century - scale trend.»

In other words, the same natural forcings that appear responsible for the modest large - scale cooling of the LIA should have lead to a cooling trend during the 20th century (some warming during the early 20th century arises from a modest apparent increase in solar irradiance at that time, but the increase in explosive volcanism during the late 20th century leads to a net negative 20th century trend in natural radiative forcing).

A slower warming rate will occur in the second half of the century, assuming that the climate forcing growth rate begins to trend downward before 2050.

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.

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.»