Sentences with phrase «of twentieth century temperature»

«The causes of twentieth century temperature change in six separate land areas of the Earth have been determined by carrying out a series of optimal detection analyses.

Reference: Stott, P. A., Tett, S. F. B., Jones, G. S., Allen, M. R., Mitchell, J. F.B. Jenkins, G. J., 2000, External control of twentieth century temperature by natural and anthropogenic causes.

Not exact matches

«Nothing in the paper undermines in any way the conclusion of earlier studies that the average temperature of the late twentieth century in the Northern Hemisphere was anomalous against the background of the past millennium,» wrote Mann and Princeton University's Michael Oppenheimer in a privately circulated statement.

If the GHCN's collection is treated as a more or less complete accounting of the available instrumental temperature record, then the number of stations rose steadily during the first half of the twentieth century, surged in the 1940s - 1970s, and then sharply declined afterward.

seems to be incompatible with the statement from his Annual review paper from 2000 (see abstract below) that: «The average surface temperature of the continents has increased by about 1.0 K over the past 5 centuries; half of this increase has occurred in the twentieth century alone.»

* 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.

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.»

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.»

It's the latest research in more than a decade of work producing a climate «hockey stick» — graphs of global or regional temperatures showing relatively little variation over a millennium or more and then a sharp uptick since the middle of the twentieth century (the blade at the end of the stick).

If the GHCN's collection is treated as a more or less complete accounting of the available instrumental temperature record, then the number of stations rose steadily during the first half of the twentieth century, surged in the 1940s - 1970s, and then sharply declined afterward.

By integrating a global database of terrestrial heat flux measurements with another database of temperature versus depth within boreholes and with the twentieth - century instrumental record of surface temperature, Huang et al. reconstruct the surface temperature history over the past 20,000 years.

The profile indicates that temperatures remain below the average over the first half of the twentieth century.

seems to be incompatible with the statement from his Annual review paper from 2000 (see abstract below) that: «The average surface temperature of the continents has increased by about 1.0 K over the past 5 centuries; half of this increase has occurred in the twentieth century alone.»

An analysis of the spatial characteristics of the observed early twentieth - century surface air temperature anomaly revealed that it was associated with similar sea ice variations.

Recognizes that warming of the climate system is unequivocal and that most of the observed increase in global average temperatures since the mid twentieth century is very likely due to the increase in anthropogenic greenhouse gas concentrations, as assessed by the Intergovernmental Panel for Climate Change in its Fourth Assessment Report;

Here we show that the hemispheric differences in temperature trends in the middle of the twentieth century stem largely from a rapid drop in Northern Hemisphere sea surface temperatures of about 0.3 6C between about 1968 and 1972.

-- Ref.4 — Tett etal (1999) «Causes of twentieth - century temperature change near the Earth's surface»?

nope Rate of recent temperature rise significantly exceeds the early twentieth century temperature rise?

With temperature changes as marked as in the first half of the twentieth century, with temperature changes as seen in Dalton minimum, Maunder minimum etcetc, we againg and again are dealing with major temperature changes in just a few decades.

Because of global warming due to increasing greenhouse gases, the maps from the late 1800s and the early 1900s are dominated by shades of blue, indicating temperatures were up to 3 °C (5.4 °F) cooler than the twentieth - century average.

Some argue that the combined increase in temperature and humidity is the major reason for accelerated tropical glacier retreat in the Andes toward the latter half of the twentieth century.2

«Twentieth century bipolar seesaw of the Arctic and Antarctic surface air temperatures».

«On forced temperature changes, internal variability, and the AMO» «Tracking the Atlantic Multidecadal Oscillation through the last 8,000 years» «The Atlantic Multidecadal Oscillation as a dominant factor of oceanic influence on climate» «The role of Atlantic Multi-decadal Oscillation in the global mean temperature variability» «The North Atlantic Oscillation as a driver of rapid climate change in the Northern Hemisphere» «The Atlanto - Pacific multidecade oscillation and its imprint on the global temperature record» «Imprints of climate forcings in global gridded temperature data» «North Atlantic Multidecadal SST Oscillation: External forcing versus internal variability» «Forced and internal twentieth - century SST trends in the North Atlantic» «Interactive comment on «Imprints of climate forcings in global gridded temperature data» by J. Mikšovský et al.» «Atlantic and Pacific multidecadal oscillations and Northern Hemisphere temperatures»

According to them the eighties and the nineties were a warming period called the «late twentieth century warming» where temperature rose at the rate of 0.1 degrees Celsius per decade.

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.

But it was impossible to even see it as long as that fake late twentieth century warming covered it up.The temperature history of your period now involves the short warming from 1976 to the beginning of the satellite era, followed by eighteen years of no warming at all until the super El Nino arrives.

«Hulme et al. (2001) noted that throughout the twentieth century, Africa has warmed at a rate of 0.5 °C century − 1 and from 1987 to 1998, the six warmest years in Africa's temperature record occurred with increasing intensity making 1998 the warmest.

Meehl et al., 2004 found that «By far the largest temperature response is to the GHGs in Fig. 1e, with slow warming occurring in the first half of the twentieth century up to about.

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».

Ozone depletion in the late twentieth century was the primary driver of the observed poleward shift of the jet during summer, which has been linked to changes in tropospheric and surface temperatures, clouds and cloud radiative effects, and precipitation at both middle and low latitudes.

In the hundred years of the twentieth century, global air temperatures rose 0.74 OC (33OF).

At some time or another, most people will have seen the hockey stick - the iconic graph which purports to show that after centuries of stable temperatures, the second half of the twentieth century saw a sudden and unprecedented warming of the globe.

«Excluding Antarctica, the twentieth - century average temperature among the six regions was about 0.4 °C higher than the averaged temperatures of the preceding five centuries»

In the opinion of the panel, 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.

In the twentieth century temperature increased the most from 1900 to 1950 but human production of CO2 was lower.

The first sentence of the opening paragraph reads, «The time history of observed twentieth - century global - mean surface temperature reflects the combined influences of naturally occurring climate variations and anthropogenic emissions of greenhouse gases and sulfate aerosols.»

A 2015 study using regional ice core data reveals no unusual temperature changes but an exceptional 30 % increase in snow accumulation during the twentieth century, again supporting Zwally's analysis of mass gain in interior west Antarctica.

The warming of surface temperature that has taken place during the past 20 years is undoubtedly real, and it is at a rate substantially larger than the average warming during the twentieth century.

· Globally, it is very likely that the 1990s was the warmest decade and 1998 the warmest year in the instrumental record, since 1861... the increase in temperature in the twentieth century is likely to have been the largest of any century during the past 1000 years.

Checking pre-satellite era temperatures we find that the first half of twentieth century warming took place between 1910 and the start of the Second World War.There was no warming from the end of that period until 1998, a stretch of more than fifty years, while carbon dioxide kept increasing.

In the opinion of the panel, the disparity between satellite and surface temperature trends during 1979 — 98 in no way invalidates the conclusion of the Intergovernmental Panel on Climate Change report (IPCC, 1996) that global surface temperature has warmed substantially since the beginning of the twentieth century.

The statewide average temperature during the winter of 2014 — 2015 was the warmest ever recorded (50.5 °F)-- more than 5 °F warmer than the average for the twentieth century.

Tett SFB et al., JGR 2002 (Estimation of natural and anthropogenic contributions to twentieth century temperature change,) says «Our analysis suggests that the early twentieth century warming can best be explained by a combination of warming due to increases in greenhouse gases and natural forcing, some cooling due to other anthropogenic forcings, and a substantial, but not implausible, contribution from internal variability.

Over the twentieth century, the methods used to measure the temperature at the surface of the ocean have changed.

And remember warming temperatures globally swung upward — at least my information tells me this — in the first half of the twentieth century before World War II and the post-war industrial boom — and the second half of the century, with all of the industrial activity, didn't global temperatures remain fairly static?

For LST [land surface temperatures], bias errors may be caused by urbanization over the twentieth century, and uncertainty due to the use of nonstandard thermometer shelters before 1950 (Jones et al. 1990; Parker 1994; Folland et al. 2001).

«The advances can not be reconciled with a climate similar to that of the twentieth century» says nothing about temperature.

The new adjustment are likely to have a substantial impact on the historical record of global - mean surface temperatures through the middle part of the twentieth century.

Again, can someone provide raw data of proxies with annual resolution that would confirm the alleged evolution of temperatures in the twentieth century?

From many years I launch appeals for raw data of proxies with annual resolution that would confirm the alleged evolution of temperatures in the twentieth century.