The allegations of climate skeptics of a global
warming slowdown in the popular media had some bearing on the emphasis placed on communicating the messages of the SPM.
Not exact matches
While it is still possible that other factors, such as heat storage
in other oceans or an increase
in aerosols, have led to cooling at the Earth's surface, this research is yet another piece of evidence that strongly points to the Pacific Ocean as the reason behind a
slowdown in warming.
Gerald Meehl, a climate scientist at the National Center for Atmospheric Research who was also an author on the paper, said this research expanded on past work, including his own research, that pointed to the Interdecadal Pacific Oscillation as a factor
in a
warming slowdown by finding a mechanism behind how the Pacific Ocean was able to store enough heat to produce a pause
in surface
warming.
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.
When ocean cycle shifts, globe is likely to
warm up When climate models were run that included the stronger winds, they were able to reproduce the
slowdown in surface temperatures.
«Global
warming slowdown: No systematic errors
in climate models, comprehensive statistical analysis reveals.»
NOAA has been the target of congressional scrutiny from Rep. Lamar Smith (R - Texas), who has launched an inquiry into a 2015 paper
in Science prepared by NOAA researchers that disputed the existence of a recent
slowdown in the rate of global
warming.
«It is often presumed that the cooler North Atlantic will quickly lead to cooling
in Europe, or at least a
slowdown in its rate of
warming,» says Ayako Yamamoto, a PhD student
in McGill's department of Atmospheric and Oceanic Sciences and lead author of the study.
The finding challenges previous arguments that a hot spot north of Cape Hatteras over the past few decades was due to a
slowdown of circulation
in the North Atlantic, which is itself due to global
warming.
The results show that even though there has been a
slowdown in the
warming of the global average temperatures on the surface of Earth, the
warming has continued strongly throughout the troposphere except for a very thin layer at around 14 - 15 km above the surface of Earth where it has
warmed slightly less.
The recent
slowdown in global
warming has brought into question the reliability of climate model projections of future temperature change and has led to a vigorous debate over whether this
slowdown is the result of naturally occurring, internal variability or forcing external to Earth's climate system.
One of the biggest lingering issues
in the global
warming slowdown is the full impact of the natural temperature cycles of Earth's oceans.
«What this study addresses is what's better described as a false pause, or
slowdown,» rather than a hiatus
in warming, says climate scientist Michael Mann of Pennsylvania State University, University Park.
«Although the Earth has continued to
warm during the temporary
slowdown since around 2000, the reduced rate of
warming in that period may have lulled us into a false sense of security.
Statistical analysis of average global temperatures between 1998 and 2013 shows that the
slowdown in global
warming during this period is consistent with natural variations
in temperature, according to research by McGill University physics professor Shaun Lovejoy.
The important question is, What does the short - term
slowdown portend for how the world may
warm in the future?
Your analysis of talk of a
slowdown in global
warming (7 December, p 34) misses what seems an obvious factor...
There is some speculation that global
warming could, via a shutdown or
slowdown of the thermohaline circulation, trigger localised cooling
in the North Atlantic and lead to cooling, or lesser
warming,
in that region.
The global
warming hiatus — a decade - plus
slowdown in warming — could be chalked up to some buoys, a few extra years of data and a couple buckets of seawater.
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.
«There is no
slowdown in global
warming,» Russell Vose, the head of the climate science division at the National Centers for Environmental Information (NCEI), said.
A cryptic chemical weather log kept by Tarawa Atoll's stony coral
in the tropical Pacific archipelago has been cracked, helping scientists explain a century of peaks and troughs
in global
warming — and inflaming fears that a speedup will follow the recent
slowdown.
The growing body of scientific evidence indicates that this negative phase has played a heavy role
in driving an approximately 15 - year old
slowdown in worldwide surface
warming.
Peter Stott, the head of climate monitoring at the U.K. Met Office, agreed, noting
in an email that, «The
slowdown hasn't gone away, however, the results of this study still show the
warming trend over the past 15 years has been slower than previous 15 year periods.
An analysis using updated global surface temperature data disputes the existence of a 21st century global
warming slowdown described
in studies including the latest Intergovernmental Panel on Climate Change (IPCC) assessment.
What would the reason be for this dramatic
slowdown in species losses if the extinction rate is determined by global
warming?
The research, published last June
in the journal Science, concluded that an improved record of surface temperatures no longer shows evidence of a
slowdown in global
warming.
All this may lead to the end of the so - called
slowdown in global
warming, although it's too soon to be sure.
I say «may» because research that tries to take gaps
in measurement into account (particularly
in the fast
warming Arctic) or that takes into account temporary phenonomena (like volcanoes, solar variability, etc) show that there has barely been any
slowdown in this one aspect of climate change.
(2) Climate models show a «cold blob»
in the subpolar Atlantic as well as enhanced
warming off the US east coast as a characteristic response pattern to a
slowdown of the AMOC.
If this tropical
warming is combined with a cooler North Atlantic Ocean from AMOC
slowdown and an increase
in midlatitude eddy energy (Fig. 21), we can anticipate more severe baroclinic storms.
One of the most plausible reasons for the recent
slowdown in warming is that the deep ocean has been acting as a heat sink, taking up more
warming than the land has
in recent years.
They suggest this «pause»
in the acceleration of carbon dioxide concentrations was,
in part, due to the effect of the temporary
slowdown in global average surface
warming during that same period on respiration, the process by which plants and soils release CO2.
The steady uptick
in warming, even with a relative
slowdown in recent decades, means that the likelihood of seeing a record cold year
in the future is, according to a quick calculation by Mann, «astronomically small.»
The PDO has been
in a cool phase for the past decade and some research has tied that to the global
warming slowdown over that time.
If the recent «
slowdown»
in global surface
warming is reversing, the stronger land carbon sink seen
in recent years may weaken again, and the rise
in CO2 may quicken again.
While the planet's surface temperatures over the past century have risen to unprecedented levels, records have shown a
slowdown in the pace of
warming over the past 15 years.
A recent
slowdown in the upward march of global temperatures is likely to be the result of the slow
warming of the deep oceans, British scientists said on Monday.
But despite the
slowdown in warming, the
warmest years on record were 1998, 2005 and 2010, according to the U.S. National Oceanic and Atmospheric Administration (NOAA).
That understanding suggests that the «
slowdown»
in warming is unlikely to continue, as England explains
in his guest post, below.
There was a significant period of
warming during the last 20 years of the 20th century, followed by a significant
slowdown in warming during the 21st.
The context makes it clear that Mr. Clinton was not recommending a
slowdown to limit
warming, and instead was saying that an economic
slowdown and emissions cuts
in the United States and other industrialized countries would have no effect because emerging economic powerhouses like China would not follow suit.
That optimism may be based on the lowered
warm - ing target
in the Paris Agreement (2015),
slowdown in the growth of global fossil fuel emissions
in the past few years (Fig.
There are then at least three independent lines of evidence that confirm we are not dealing with a
slowdown in the global
warming trend, but rather with progressive global
warming with superimposed natural variability:
This was one of the motivations for our study out this week
in Nature Climate Change (England et al., 2014) With the global - average surface air temperature (SAT) more - or-less steady since 2001, scientists have been seeking to explain the climate mechanics of the
slowdown in warming seen
in the observations during 2001 - 2013.
He and his colleagues have even done analyses that show that after correcting for ENSO effects, there is no sign of a
slowdown in global
warming at all.
Slowed
Warming Zeke Hausfather, a data analyst at the Berkeley Earth project, has filed «Examining the Recent
Slowdown in Global
Warming» at the Yale Forum on Climate Change and the Media.
To some extent, this is again due to the factors mentioned above, but additionally, the models predict that the North Atlantic as a whole will not
warm as fast as the rest of globe (due to both the deep mixed layers
in this region which have a large thermal inertia and a mild
slowdown in the ocean heat transports).
If that is
in fact the case, and I see no reason to doubt it, then the fact that the oceans are continuing to
warm can have no bearing on the hiatus at all, and will not reflect the
slowdown in atmospheric
warming for «decades.»
... a pronounced strengthening
in Pacific trade winds over the past two decades — unprecedented
in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial
slowdown in surface
warming through increased subsurface ocean heat uptake.