Sentences with phrase «past natural warming»

Putting aside the overused «hottest» adjective, does NOAA's empirical measurement prove that modern warming is significantly different than past natural warming?

They now say modern warming is just a fraction of past natural warming

It has been repeatedly attacked by Republican lawmakers and some industry - financed groups as built on cherry - picked data meant to create an alarming view of recent warming and play down past natural warm periods.

Not exact matches

They'd seen slowdowns in the past, often associated with natural cycles in the Earth's climate — England pointed to periods when the Earth has taken a break from warming, such as from 1945 to the late 1970s.

In the interest of our future world, scientists must seek to understand the complexities of linked natural events and field observations that are revealed in the geologic record of past warmer climates.

Even if humans are contributing to global warming, isn't this just like the natural variations that have happened many times in the past?

The two studies will help scientists to understand the natural variability of past climate and to predict tropical glaciers» response to future global warming.

In the past few years, climate scientists finally agreed that the world is indeed warming, humans are behind it, and natural processes are unlikely to rein it in - just as they had suspected.

Rather than using complex computer models to estimate the effects of greenhouse - gas emissions, Lovejoy examines historical data to assess the competing hypothesis: that warming over the past century is due to natural long - term variations in temperature.

«This quantitative attribution of human and natural climate influences on the IPWP expansion increases our confidence in the understanding of the causes of past changes as well as for projections of future changes under further greenhouse warming,» commented Seung - Ki Min, a professor with POSTECH's School of Environmental Science and Engineering.

Natural geochemical processes that result in the slow buildup of atmospheric carbon dioxide may have caused past geologic intervals of global warming through the greenhouse effect

He believes that changes in ocean circulation have warmed the Atlantic and increased hurricane activity in the past decade and that this is simply the result of normal oscillation in natural climate cycles.

However, Goddard said the results don't fully show the slowdown has disappeared when comparing the past 15 years to the decades preceding that period and that understanding the natural fluctuations in climate on a year - to - year (or even decade - to - decade) basis provides important context to the warming trends driven by carbon dioxide.

A Warmer Earth, and Fewer Insured Private insurers also point fingers at a changing climate, citing a report issued by the Intergovernmental Panel on Climate Change (IPCC) earlier this year that concluded global warming is to blame for a doubling over the past five years of natural disasters — and that the situation will worsen if nothing is done to stop it.

The natural causes of past climate variations are increasingly well - understood, and they can not explain the recent global warming.

Regardless of how much warming is natural vs anthropogenic, if the warming rate is half, one - third, or an even smaller fraction over the past 25 yrs than you have been led to believe it was, would that not be cause for serious reflection?

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 %).

«The reconstruction of past climate reveals that recent warming in the Arctic and in the Northern Hemisphere is highly inconsistent with natural climate variability over the last 2000 years.»

Because human - made warming is more rapid than natural long - term warmings in the past, there is concern that methane hydrate or peat feedbacks could be more rapid than the feedbacks that exist in the paleoclimate record.

At present, however, there is no accepted tool or technique for confidently estimating how much of the warming in the past 38 + years might be due to natural causes.

The assessment examines the following content; global warming, the greenhouse effect / gases, natural and human causes of past climate change, evidence of the little ice age, features of tropical storms and the effects and response to tropical storms.

As with many Maseratis from the past, the new car's name is inspired by a wind: the Levante is a warm Mediterranean wind that can change from a light breeze to an irresistible natural force in an instant, mirroring the character of the first Maserati SUV.

So we were very excited when we realized a lot of changes in the past century from warmer to cooler and then back to warmer were all natural,» Tsonis said.

I am not sure I understand Andy's question number (5), but «nature» involves many species: even if some parts of «nature» may survive global warming at the end (as parts of it have survived natural climate change events in the past), many parts of it are already going extinct and we are to blame this time around.

The past decade, at the very least, has not seem the same rate of warming as the previous two decades (all natural variability such as ENSO accounted for).

That would only tell us that in principle, natural causes can cause warming larger than what we've seen in the past decades.

Thus, we can conclude that both a natural cycle (the AMO) and anthropogenic forcing could have made roughly equally large contributions to the warming of the tropical Atlantic over the past decades, with an exact attribution impossible so far.

Since the climate has demonstrably changed in the past many times, all assumed to be natural, then our random selections of time periods would most likely encompass periods of natural warming or natural cooling.

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.

Here are some possible choices — in order of increasing sophistication: * All (or most) scientists agree (the principal Gore argument) * The 20th century is the warmest in 1000 years (the «hockeystick» argument) * Glaciers are melting, sea ice is shrinking, polar bears are in danger, etc * Correlation — both CO2 and temperature are increasing * Sea levels are rising * Models using both natural and human forcing accurately reproduce the detailed behavior of 20th century global temperature * Modeled and observed PATTERNS of temperature trends («fingerprints») of the past 30 years agree

``... estimates of future rises remain hazy, mostly because there are many uncertainties, from the lack of data on what ice sheets did in the past to predict how they will react to warming, insufficient long - term satellite data to unpick the effects of natural climate change from that caused by man and a spottiness in the degree to which places such as Antarctica have warmed....

What is most interesting is that none of the skeptics / deniers have a scientific explanation to explain the warming over the past 30 + years which has far exceeded natural influences.

And whereas the past interglacials were natural cycles, the current warming is not.

If there was more natural variation in the past millenia, specifically due to solar changes, then that goes at the cost of the GHG / aerosol combination, as both are near impossible to distinguish from each other in the warming of the last halve century... Solar activity has never been as high, and for an as long period, as current in the past millenium (and even the past 8,000 years).

And in some articles where I have read that it is being observed, often historical data shows those cities and / or regions to have been warmer in the past century, which would seem to indicate (1) the permafrost issue isn't new or necessarily unnatural and / or (2) there is a substantial lag between permafrost melting and rising temps (ie, the current permafrost melt is mostly or all natural).

Basically natural forces have driven climate in the past but theres no evidence they are causing recent warming.

As presented below, the temperature record of each of these groups (available at the URLs given at the bottom of this message) shows the same features: (i) a warming of about 0.9 °C (1.6 °F) over the past 150 years and (ii) natural variability with both short and long periods.

There is no «proof» that these are more than natural occurrences (or, admittedly, neither that they are not) and require, for now, really contorted tortuous explanations (snow / ice getting covered with soot, Arctic really getting lots warmer than the few tenths of a degree of the global average just the past 2 - 3 decades, etc.) why AGW is causing them — though they are professed with religious conviction.

But existence of a warmer climate in the past doesn't mean that the current warming is natural, any more than the existence of natural fires rules out arson in some recent warehouse blaze.

But as we started to try to piece together the puzzle of what those data were telling us, they also were telling us about natural variations in temperature in the past and how they compared to the warming trends of the past century.

It is extremely unlikely (< 5 %) that the global pattern of warming during the past half century can be explained without external forcing, and very unlikely that it is due to known natural external causes alone.

Multi-signal detection and attribution analyses, which quantify the contributions of different natural and anthropogenic forcings to observed changes, show that greenhouse gas forcing alone during the past half century would likely have resulted in greater than the observed warming if there had not been an offsetting cooling effect from aerosol and other forcings.

Reefs: Natural temperature - limiting processes may prevent ocean surface waters from warming past levels dangerous to corals, at least in some important regions, according to a study being published in Geophysical Research Letters on Saturday.

«That you can't support your claims with any substantive body of research...» The empirical data shows that natural climate variability is still the primary cause of the climate warming of the past century.

Only the natural warming of the 2015 - 2016 El Nino has caused any increase in temperature trend over the past 2 decades.

Some of these climate drivers result in warming and others lead to cooling, but when all the natural and human - induced climate drivers are stacked up and compared to one another, the accumulation of human - released heat - trapping gases in the atmosphere is so large that it has very likely swamped other climate drivers over the past half century, leading to observed global warming.

Arguing that climate has changed in the past therefore current warming is probably natural is legitimately regarded as being a weak, unconstructive, unphysical argument.

In monthly Rasmussen polling over the past two years, an average of 46 percent of those polled said that natural causes are responsible for global warming, while an average of 38 percent answered that human activity is the cause.

In the natural cycle regarding long term natural climate change caused by Milankovitch cycles, at least for the past million years or so, the sensitivity response to changes is indicated to alter the global temperature by 6º Celsius between warm periods and glacial periods.

Thank you for agreeing that there are other factors at work in global warming and bearing in mind the strength of those as demonstrated by climate history then any claim that man - made factors are anywhere near as large as 100 % or greater are going to have to demonstrate the current and past natural changes and how they interact.