Sentences with phrase «global warming estimates»

An assessment of the primary sources of spread of global warming estimates from coupled atmosphere — ocean models.

But, when a colleague of his, Jim Goodridge, described the urbanization bias problem to him, Watts started to become sceptical about the reliability of the current «global warming estimates».

As we will see below, these siting biases seem to have also introduced a warming bias into the global warming estimates — at least for the U.S. region, which we studied.

So, does this paper essentially cut global warming estimates in 1/2... or are we looking at a «return with a vengeance» after 2030?

The issue of Urban Heat is duscussed at length in the book, and one of Crichton's main points is that the UHIE is a known issue that is factored into global warming estimates.

``... most [committed global warming estimates with present (around 410ppm CO2, etc) constant concentrations] are around 0.5 - 1ºC...»

Thus, although poor station quality might affect absolute temperature, it does not appear to affect trends, and for global warming estimates, the trend is what is important

Translated into a global warming estimate, a feedback of 6 W m - 2 K - 1 would correspond to a rather trivial 0.6 deg.

Not exact matches

Schmidt's rough estimate, which he posted on Twitter, is based on the extraordinary and unprecedented warming over the past 12 months, during which time global surface temperatures have shot past the 1 °C above pre-industrial level.

He is the principal investigator for a mission called Oceans Melting Greenland (affectionately known as OMG), a five - year effort to assess the extent to which warmer oceans are melting Greenland's glaciers, and how this information can be used to better estimate global sea level rise.

A recent study (pdf) estimated that at the current rate of global warming, Manhattan will face a sea level rise of 2 feet or more by 2080.

With Arctic temperatures warming twice as fast as the global average, scientists estimate thawing permafrost could release large amounts of carbon into the atmosphere through the end of the century with significant climate impacts.

They estimate that, across about 60 % of the global vegetated area, greening has buffered warming by about 14 %; for the remaining areas, which mostly include boreal zones, LAI trends have amplified the raise in air temperatures, leading to an additional warming of about 10 %.

This amount of emissions is usually taken as a rough estimate of the allowable emissions to reach the two degree Celsius global - warming target.

In 2011 Stefan Rhamstorf of Potsdam University in Germany estimated that there was an 80 per cent chance that the heatwave would not have happened without global warming (PNAS, doi.org/dhnggk).

«Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct.

By reconstructing past global warming and the carbon cycle on Earth 56 million years ago, researchers from the Niels Bohr Institute among others have used computer modelling to estimate the potential perspective for future global warming, which could be even warmer than previously thought.

The calculations are in line with estimates from most climate models, proving that these models do a good job of estimating past climatic conditions and, very likely, future conditions in an era of climate change and global warming.

Most people in South Florida, an estimated 54 percent, think global warming is already harming people in the United States, also 6 points higher than the national estimate.

Reseachers find that, no matter how much data they collect, they may not be able to get a good estimate of the highest temperature increases that global warming may bring.

So a giant «methane burp» as the Arctic warms could apparently worsen global warming and cost the world an estimated...

The townships must be relocated (at an estimated cost of more than $ 100 million), so they should stand a good chance of a court upholding a claim that they suffered damages because of global warming.

Did such poor station quality exaggerate the estimates of global warming?

The UN Intergovernmental Panel on Climate Change (IPCC) has estimated that the average global warming in this century will rise by 4 °C in a business - as - usual scenario.

7It is particularly ironic that Lomborg would offer such a ridiculously precise estimate of the cost of the impacts of climate change from carbon dioxide emissions, inasmuch as the entire thrust of his books chapter on «global warming» is that practically nothing about the effects of greenhouse gases is known with certainty.

The new numbers will be used in models created by economists, environmentalists, and governments who use population estimates to predict pollution and global warming levels; prepare for epidemics; determine road, school, and other infrastructure requirements; and forecast worldwide economic trends.

The U.S. National Research Council (NRC) estimates that every degree Celsius of warming in global average temperatures means a 5 to 15 percent drop in yield, particularly for corn, in North America.

Co-author Dr Eleanor Burke, from the Met Office Hadley Centre, said: «The advantage of our approach is that permafrost loss can be estimated for any policy - relevant global warming scenario.

Abstract — James L. Crowley — 12 November 2010 Effects of Rapid Global Warming at the Paleocene - Eocene Boundary on Neotropical Vegetation Temperatures in tropical regions are estimated to have increased by 3 ° to 5 °C, compared with Late Paleocene values, during the Paleocene - Eocene Thermal Maximum (PETM, 56.3 million years ago)......... eastern Colombia and western Venezuela.

al. — May 2013 Global Warming and Neotropical Rainforests: A Historical Perspective... Our compilation of 5,998 empirical estimates of temperature over the past 120 Ma indicates that tropics have warmed as much as 7 °C during both the mid-Cretaceous and the Paleogene.....

The range (due to different data sets) of global surface warming since 1979 is 0.16 °C to 0.18 °C per decade compared to 0.12 °C to 0.19 °C per decade for MSU estimates of tropospheric temperatures.

In a recent paper in Geophysical Research Letters, Scafetta & West (S&W) estimate that as much as 25 - 35 % of the global warming in the 1980 - 2000 period can be attributed changes in the solar output.

As shown later in this paper, the global warming potential of the annual emissions of CH4 from Amazonian wetlands is equivalent to about 30â $ «40 % of the estimated annual accumulation of C in woody biomass of mature Amazonian forests.»

Still, it seems to me that even a rough estimate of the extent to which increasing solar output is raising temperatures on Mars would be a useful reality check on the «global warming» claims being made here on Earth.

As I understand it, the GCR - idea does not deny human influences on global warming and does not really provide a good estimate of what the magnitude of GCR influences might be.

Since 1950, the volcanic forcing has been negative due to a few significant eruptions, and has offset the modestly positive solar forcing, such that the net natural external forcing contribution to global warming over the past 50 years is approximately zero (more specifically, the authors estimate the natural forcing contribution since 1950 at -10 to +13 %, with a most likely value of 1 %).

More than half of that rise was due to global warming, they estimated.

Keep in mind that the Paris study, looking at all the science of global warming, will only project a «best estimate» that temperatures will rise by 3 Celsius (5.4 Fahrenheit) by 2100 over pre-industrial levels.

«My fieldwork with the support of the InBev - Baillet Latour Fellowship will shed light on which processes are responsible for this ice shelf breakup, thereby improving the estimates how, when and where East Antarctica is most vulnerable to global warming.»

The IPCC's overall estimate of global sea level rise, which includes all the other factors that affect sea levels, such as melt from Greenland's ice sheets and the oceans expanding as they warm, is 60 cm by 2100 (with a likely range of 42 to 80 cm).

Global mean temperature for the period January to September 2017 was 0.47 ° ± 0.08 °C warmer than the 1981 - 2010 average (estimated at 14.31 °C).

For example, the harlequin frog, golden toad, and an estimated two - thirds of the 110 or so other brightly - colored toad species once plentiful in the mountains of Costa Rica have vanished, with a pathogen outbreak tied to global warming believed to be a key factor in their extinction.

The finding was an estimate, with the researchers concluding global warming likely drove between 6 million acres and 16 million acres of forest fire.

In a 2008 presentation, Dunn stated «I assert that warm is good for human health and that global warming, even the most extreme estimates, will not create heat illness or death increases and certainly no changes that are more important than the basic public health measures of vector control, water, nutrition, sewage and water quality, and housing quality.»

Estimated solar contribution to the global surface warming using the ACRIM TSI satellite composite.

The headline number (2.3 ºC) is a little lower than IPCC's «best estimate» of 3ºC global warming for a doubling of CO2, but within the likely range (2 - 4.5 ºC) of the last IPCC report.

For the U.S., the rise in heat - trapping gases in the atmosphere has increased the probability of record - breaking temperatures 15 - fold.21 In Europe, global warming is now responsible for an estimated 29 % of the new record highs set each year.22

[Further Response: Our estimates of the magnitude of future global warming do not come from ice core data, and do not depend on it in any way.

If we continue we'll soon get close to 560 [double the carbon dioxide concentration preceding the industrial revolution] or 2.3 (our estimate) to 3 (I.P.C.C.) degrees C. (4.1 - 5.4 degrees F.) global average surface air warming.

Indeed, if one accepts a very liberal risk level of 50 % for mean global warming of 2 °C (the guiderail widely adopted) since the start of the industrial age, then under midrange IPCC climate sensitivity estimates, then we have around 30 years before the risk level is exceeded.