The World Meteorological Organization says the planet «experienced unprecedented high - impact climate extremes» in the ten years from 2001 to 2010,
the warmest decade since the start of modern measurements in 1850.
According to the IISD account, Germany, supported by Belgium and Ireland, suggested singling out the fact that the first decade of the 21st century was
the warmest decade since 1850 [at least according to the dataset used by the IPCC, which we criticise elsewhere on this blog].
1 °C
Warming Each Decade Since 1970s Want a stat to remember?
Not exact matches
The report found, among other things, that 43 of the lower 48 U.S. states have set at least one monthly heat record
since 2010, sea levels are expected to rise between one and four feet by the end of this century, winter storms have increased in intensity and frequency, and the past
decade was
warmer than every previous
decade in every part of the country.
In the
decades since, global
warming and the threat posed by waste and pollution have been thrust into the spotlight.
Sensors that have plumbed the depths of Arctic seas
since 2002 have found
warm currents creeping up from the Atlantic Ocean and helping drive the dramatic retreat of sea ice there over the last
decade.
Warming since 1970 now stands at 0.31 F per
decade — three times what Callendar reported in 1938.
On the other hand there has been no really notably dry, hot, sunny summer in the UK
since 2006; summers overall have either been around average or exceptionally wet, and this appears to be linked with strong
warming and more frequent high pressure over Greenland in the last
decade.»
The rate of
warming was just 0.04 °C per
decade from 1998 to 2012, significantly lower than the average 0.11 °C
warming per
decade since 1951 (see «How much has
warming slowed?
And there remains little doubt that average temperatures are getting
warmer at ground level; data from NOAA's National Climatic Data Center reveals that the last
decade was the
warmest since record - keeping began.
Each
decade since 1970, average summer temperatures have
warmed about 0.45 °F (0.25 °C).
New measurements by NASA's Goddard Institute for Space Studies indicate that 2012 was the ninth
warmest year
since 1880, and that the past
decade or so has seen some of the
warmest years in the last 132 years.One way to illustrate changes in global atmospheric temperatures is by looking at how far temperatures stray from «normal», or a baseline.
And
since mitigation reduces the rate as well as the magnitude of
warming, it also increases the time available for adaptation to a particular level of climate change, potentially by several
decades.
That may be true, remarks Sascha Caron, a physicist from the University of Freiburg in Germany, but nonetheless much of the particle physics community has
warmed to the idea of global searches
since Knuteson first proposed it early in this
decade.
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.
The Intergovernmental Panel on Climate Change (IPCC)'s recent report said the rate of
warming over the past 15 years has been 0.05 degrees Celsius per
decade — quite a bit smaller than the 0.12 degrees per
decade calculated
since 1951.
Across the globe in recent
decades, there has been an increase in the number of hot extremes, particularly very
warm nights.1 Hot days have also been hotter and more frequent.2
Since 1950 the number of heat waves has increased and heat waves have become longer.3
The aforementioned Foster and Rahmstorf (2011) found a 0.16 °C per
decade warming trend
since 1979 after filtering out the short - term noise.
The Western Antarctic Peninsula has been rapidly cooling
since 1999 -LRB--0.47 °C per
decade), reversing the previous
warming trend and leading to «a shift to surface mass gains of the peripheral glacier» (Oliva et al., 2017).
For example, the borehole data show
warming since about 1500 AD which clearly was not anthropogenic, and in the latest
decade,
since the very
warm 1998, the temperature trend is downward even in the Hadley Center compilations; the most ardent supporters of anthropogenic global
warming.
Seasonal decreases in land precipitation
since the 1950s are the main cause for some of the drying trends, although large surface
warming during the last two to three
decades has also likely contributed to the drying.
Resolving the climate challenge will take
decades, but we must get started,
since some additional
warming is already «locked - in» due to inertia in the climate system.
The European Alps have been growing
since the end of the last little Ice Age in 1850 when glaciers began shrinking as temperatures
warmed, but the rate of uplift has accelerated in recent
decades because global
warming has sped up the rate of glacier melt, the researchers say.
The rate of ocean
warming has nearly doubled
since 1992 compared with the previous three
decades.
Unfortunately, the bully isn't going away anytime soon
since human emissions to date have locked in climate change - fueled
warming for
decades if not centuries to come.
That gap has
since narrowed to once every five to six years, with water temperatures often hotter during cool La Niña years today than they were during
warm El Niño years a few
decades ago.
Since 1950, average statewide temperatures have increased by 0.5 °F /
decade (0.3 °C /
decade), with greatest
warming in spring; projected to increase by 3 - 7 °F (1.7 - 3.9 °C) by mid century, with greatest
warming in summer and winter and in the southeast.
The methane piece of the global
warming puzzle is even more difficult to grasp because while its levels have steadily risen
since the mid-19th century, they have leveled off in the past
decade, and scientists aren't sure why — there could be less methane emissions or more destruction of the molecule as it reacts in the atmosphere.
After spending a
decade - plus making big - budget studio pictures, Jon Favreau returns to his indie roots, making his
warmest, funniest, most personal picture
since «Swingers.»
It gives a rate of
warming of some 0.07 degrees C /
decade and a total rise in surface temperature of some 0.4 degrees C
since 1944.
Warming of the climate system is unequivocal, and
since the 1950s, many of the observed changes are unprecedented over
decades to millennia.
Since the CMIP5 models used by the IPCC on average adequately reproduce observed global
warming in the last two and a half
decades of the 20th century without any contribution from multidecadal ocean variability, it follows that those models (whose mean TCR is slightly over 1.8 °C) must be substantially too sensitive.
The world
warmed around 5 °C in 10,000 years
since the last glacial maximum — that's 0.005 °C per
decade on average.
Each of the last three
decades has been successively
warmer at the Earth's surface than any preceding
decade since 1850.
Further,
since you agree with us that the
warming rate during the next several
decades will be below 0.325 ºC /
decade, then, as I have pointed out, due to the level of natural variability, a 20 - yr time period is too short to really differentiate between your beliefs and ours (if there exist any).
You seem to have gone to quite some length in creating an impressive straw man, which doesn't really need dealing with in detail,
since I can simply jump to the end - point and agree that
warming in excess of 0.325 C /
decade is indeed unlikely over the next few
decades.
[Response: You're wrong, as JA points out,
since much of the
warming over the next few
decades is contrained by commitment and current levels and doesn't much vary by scenario.
But the
warming since about 1980 has increased the expected number of records in the last
decade by a factor of five.
During the past
decade, most years ranked among the
warmest since record keeping began in the mid-1800s.
Let's say there was a cooling over the next
decade such that the total
warming since 1950 dropped by 0.1 degrees.
A globally
warm medieval period could be a simple forced response to increased solar, in which case it doesn't imply any larger intrinsic variability than already assumed, and
since solar has been pretty much constant over the last 50 years, improvements to our understanding of solar forced climate changes are irrelevant for the last few
decades.
In fact, the I.P.C.C. WGII report, in the chapter on North America says «Research
since the [last IPCC report] supports the conclusion that moderate climate change will likely increase yields on North American rain fed agriculture... Most studies project likely climate - related yield increases of 5 - 20 % over the first
decades of the century... Major challenges are projected for crops that are near the
warm end of their suitable range or depend on highly utilized water resources.»
It is still a quarter less than the
warming trend
since 1980, which is 0.16 °C per
decade.
Both the Microwave Sounding Unit (MSU) satellite (analyzed by the University of Alabama in Huntsville by John Christy and Roy Spencer) and weather balloon data (trends reported by a number of researchers, notably Jim Angell at NOAA) have failed to show significant
warming since the satellite record began in late 1978, even though the surface record has been rising at its fastest pace (~ 0.15 C /
decade)
since instrumental records began.
After using satellite data and a smart statistical method to fill gaps in the network of weather stations, the global
warming trend
since 1998 is 0.12 degrees per
decade — that is only a quarter less than the long - term trend of 0.16 degrees per
decade measured
since 1980.
Especially
since based on the model calculations you'd expect anyway trends around 0.2 degrees per
decade, because models predict not a constant but a gradually accelerating
warming.
As one example, the rate of
warming over the past 15 years (1998 — 2012; 0.05 -LSB--- 0.05 to +0.15] °C per
decade), which begins with a strong El Niño, is smaller than the rate calculated
since 1951 (1951 — 2012; 0.12 [0.08 to 0.14] °C per
decade).
Preliminary calculations * show that surface temperatures ** averaged over the globe in 2004 were the fourth highest (and the past
decade was the
warmest)
since measurements began in 1861.
And there are plenty of important questions to resolve about the climate of the Holocene — this comfy
warm interval humans have enjoyed
since the end of the last ice age — before the human influence on the system built in recent
decades.
UAH shows
warming of 0.13 degrees per
decade since 1979 (the least of any series).