Sentences with phrase «global mean temperature over»

If our technique is confounded by this signal, there should be a substantial trend in the inferred global mean temperature over the 20th century in both the models and observations, matching the trend in this signal.

(bottom) HadCRUT3g global mean temperature over the 20th century, with approximate breaks in temperature indicated.

bender, the climate scientists and climate modelers who work for the same organization I do are quite adamant in stating that there has been nothing resembling a flatlining of global mean temperature over the past decade.

are quite adamant in stating that there has been nothing resembling a flatlining of global mean temperature over the past decade

Their position is that global mean temperature over the last decade remains on a strongly upward trend — no «ifs», «ands», or «buts» about it.

# 212 — Scott - in - Wa wrote (concerning collegial views) that, «Their position is that global mean temperature over the last decade remains on a strongly upward trend — no «ifs», «ands», or «buts» about it.

The change in global mean temperature over time is as useful an index as the change in body weight of an individual, and in both cases there is no process that is directly a function of either.

Lastly, the method is applied to the linear trend in global mean temperature over the period 1951 — 2010.

In any case that is still irrelevent since the true average global mean temperature over whatever baseline 30 year or whatever time frame they choose, is also a completely unknown number for the very same sampling failure reasons.

If you look at the increase in global mean temperature over the last fifty years, the vast majority of that is associated with human activity and the burning of fossil fuels.

Our results concern the effect of tropical Pacific SST on global mean temperature over the past 15 years.

Leaving aside the statistics and looking at the conclusions of the paper, how reasonsonable does it seem to paleocimatologists that the global mean temperature over 900 years (1000 - 1900 AD) did not vary more than 0.15 °C plus or minus?

It first needs to be emphasized that natural variability and radiatively forced warming are not competing in some no - holds barred scientific smack down as explanations for the behavior of the global mean temperature over the past century.

Simulations where the magnitude of solar irradiance changes is increased yield a mismatch between model results and CO2 data, providing evidence for modest changes in solar irradiance and global mean temperatures over the past millennium and arguing against a significant amplification of the response of global or hemispheric annual mean temperature to solar forcing.

Not exact matches

Studies of sea level and temperatures over the past million years suggest that each 1 °C rise in the global mean temperature eventually leads to a 20 - metre rise in sea level.

The IPCC, in its most recent assessment report, lowered its near - term forecast for the global mean surface temperature over the period 2016 to 2035 to just 0.3 to 0.7 degree C above the 1986 — 2005 level.

In the last 40 years, temperatures in parts of the country have gone up by as much 4.5 degrees F — well over the global mean rise of 1 degree.

They then looked at what that meant for the temperature rise over the coming few decades, and found that global warming this century will indeed be slower than thought.

If this rapid warming continues, it could mean the end of the so - called slowdown — the period over the past decade or so when global surface temperatures increased less rapidly than before.

This means that if the GCR - warming hypothesis is correct, this increase in GCRs should actually be causing global cooling over the past five decades, and particularly cold temperatures in recent years.

Global mean surface temperatures have risen by 0.74 °C ± 0.18 °C when estimated by a linear trend over the last 100 years (1906 — 2005).

Global mean temperatures averaged over land and ocean surfaces, from three different estimates, each of which has been independently adjusted for various homogeneity issues, are consistent within uncertainty estimates over the period 1901 to 2005 and show similar rates of increase in recent decades.

The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.

Using thus 10 different climate models and over 10,000 simulations for the weather@home experiments alone, they find that breaking the previous record for maximum mean October temperatures in Australia is at least six times more likely due to global warming.

[T] he idea that the sun is currently driving climate change is strongly rejected by the world's leading authority on climate science, the U.N.'s Intergovernmental Panel on Climate Change, which found in its latest (2013) report that «There is high confidence that changes in total solar irradiance have not contributed to the increase in global mean surface temperature over the period 1986 to 2008, based on direct satellite measurements of total solar irradiance.»

To contribute to an understanding of the underlying causes of these changes we compile various environmental records (and model - based interpretations of some of them) in order to calculate the direct effect of various processes on Earth's radiative budget and, thus, on global annual mean surface temperature over the last 800,000 years.

The average temperature on Earth has barely risen over the past 16 years, indicating that global warming is currently taking a break - though that doesn't mean it's over yet.

Using a statistical model calibrated to the relationship between global mean temperature and rates of GSL change over this time period, we are assessing the human role in historic sea - level rise and identifying human «fingerprints» on coastal flood events.

However, temperature anomalies are much better correlated over large distances, and this is why the global mean temperature calculations use local anomalies not absolute temperatures.

If mean global temperatures trending significantly upward over the last 100 years isn't worrying enough for you, how about that giant piece of Antarctica that is about to crack off and sink into the ocean... I don't know how the existence of global warming is still a debate!

Finally, the presence of vigorous climate variability presents significant challenges to near - term climate prediction (25, 26), leaving open the possibility of steady or even declining global mean surface temperatures over the next several decades that could present a significant empirical obstacle to the implementation of policies directed at reducing greenhouse gas emissions (27).

This doesn't address longer causal connections, but if the net impact of temperature on CO2 can be shown to be neutral or in the negative direction over then long term, than cointegration probably means that CO2 is causing global warming.

«we predict that global mean temperatures will increase over the 21st century, with a range from 1.5 — 4degrees.»

Does that mean the global mean surface temperature trends over the 20th Century, or just that some 20th Century data is used?

B. Takes an adjustment to sea temperatures in a defined period and implies that it impacts the global mean temperatures trend estimates over the entire twentieth century.

Nevertheless, information from independent data suggest an increase in global mean temperatures even over the last decade.

One way to look at the climate is that global mean surface temperatures have wandered up and down, to the left and the right, warmer and cooler, over the last thousand years, but have generally stayed a straight course, represented by the dashed line placed on the graph by the I.P.C.C. in 1990.

re Gavin @ 223 I know what the mean global temperature is (actually, I don't, see below) but the question was why is this a meaningful metric for looking at changes over time, when you could get the same global mean from very different distributions of temperature (eg increase the poles, decrease the tropics) which would have very different interpretations of energy balance (at least if I am right that humidity matters)?

Transient climate sensitivity: The global mean surface - air temperature achieved when atmospheric CO2 concentrations achieve a doubling over pre-industrial CO2 levels increasing at the assumed rate of one percent per year, compounded.

[Response: The global mean temperature anomaly is the 2D integral of temperature anomalies over the surface.

Global mean temperature since the last ice age has oscillated quasi-periodically between about + / - 1 % of its mean; over that time, the mean has slightly declined, as have the maxima and minima of the excursions.

It's easy to derive from this the CO2 level compatible with the policy goal of limiting the rise in global mean surface temperature to 2ºC over the pre-industrial level.

Another equally important challenge is the fact that there are pronounced ~ 11 - year variations in the CRF, but the presence of ~ 11 - year variations in the global mean temperature are much less pronounced than the trend over the 3 — 4 most recent decades.

Mark, by «VERY GOOD» do you mean the reliability, variances and error bars of measuring average global mean temperatures and CO2 mixing ratios over the past 150 years is about as good as measuring your height over the past 30 years?

In Fig. 8, I have digitized the outer bounds of the model runs in Fig. 7, and also plotted the HadCRUT3 global annual mean temperature anomaly over the same period.

I sincerely hope that you are not serious in maintaining the following: The peak warming is linearly proportional to the cumulative carbon emitted It doesn't matter much how rapidly the carbon is emitted The warming you get when you stop emitting carbon is what you are stuck with for the next thousand years The climate recovers only slightly over the next ten thousand years At the mid-range of IPCC climate sensitivity, a trillion tonnes cumulative carbon gives you about 2C global mean warming above the pre-industrial temperature.

Most of the images showing the transient changes in global mean temperatures (GMT) over the 20th Century and projections out to the 21st C, show temperature anomalies.

Under most scenarios of late 20th century and future anthropogenic radiative forcing, a steady, rather than accelerating, rise in global and hemispheric mean temperature is predicted over timescales of decades.

-- What's the mean avg growth in global CO2 and CO2e last year and over the prior ~ 5 years — What's the current global surface temperature anomaly in the last year and in prior ~ 5 years — project that mean avg growth in CO2 / CO2e ppm increasing at the same rate for another decade, and then to 2050 and to 2075 (or some other set of years)-- then using the best available latest GCM / s (pick and stick) for each year or quarter update and calculate the «likely» global surface temperature anomaly into the out years — all things being equal and not assuming any «fictional» scenarios in any RCPs or Paris accord of some massive shift in projected FF / Cement use until such times as they are a reality and actually operating and actually seen slowing CO2 ppm growth.

4) Over this period (the past two centuries), the global mean temperature has increased slightly and erratically by about 1.8 degrees Fahrenheit or one degree Celsius; but only since the 1960's have man's greenhouse emissions been sufficient to play a role.