The latest temperature maps, released today, confirm parts of the tropical Pacific are up to 3C
warmer than the long term average (dark red in the map below).
Independent analysis seem to indicate that over last half dozen years, the ocean has shown less
warming than the long term trend but nevertheless, a statistically significant warming trend.
Not exact matches
The January - to - March quarter was the nation's
warmest three - month start since at least 1895, with an average temperature of 42.01 degrees Fahrenheit — six degrees
warmer than the
long -
term average, according to the National Oceanic and Atmospheric Administration.
• The stepfather - child relationship is substantially more challenging
than the biological - father - child relationship: the relationship is not as close; stepfathers are less affectionate and more coercive with stepchildren; and stepchildren tend to be less
warm and affectionate with stepfathers — even in
long -
term fairly successful stepfamilies (for review see Radhakrishna et al, 2001).
The coverage of living corals on Australia's Great Barrier Reef could decline to less
than 10 percent if ocean
warming continues, according to a new study that explores the short - and
long -
term consequences of environmental changes to the reef.
The
long -
term geological record reveals an early Cenozoic
warm climate that supported smaller polar ecosystems, few coral - algal reefs, expanded shallow - water platforms,
longer food chains with less energy for top predators, and a less oxygenated ocean
than today.
A provocative study of
long -
term tropical tree growth warns that global
warming could happen faster
than anticipated.
The same contortions of the polar vortex that blasted more
than half of the U.S. allowed unusual warmth to spread north to Alaska, which was 14 degrees Fahrenheit
warmer in January
than the
long -
term average.
Following a record
warm July, Norway had an August temperature that was 1.8 °F (1.0 °C) higher
than the 1961 - 1990
long -
term average for the country.
In the latter half of the decade, La Niña conditions persisted in the eastern and central tropical Pacific, keeping global surface temperatures about 0.1 degree C colder
than average — a small effect compared with
long -
term global
warming but a substantial one over a decade.
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.
«It is true that they do
warm climate by strong methane emissions when they first form, but on a
longer -
term scale, they switch to become climate coolers because they ultimately soak up more carbon from the atmosphere
than they ever release.»
They found that because natural gas plants are overall more efficient
than coal plants, producing more energy per unit of carbon, they could cause less
warming in the
long term.
Much of the focus of these side events has been on ways to ratchet up ambition, either through more private - sector engagement or through an emphasis on gaining more traction for a
long -
term goal of containing
warming to 1.5 degrees Celsius below preindustrial levels, rather
than the «well below 2» threshold enshrined in Paris.
For instance, a coral growing in a back - reef lagoon — whose restricted waters may
warm drastically each afternoon under the blazing sun — may be less susceptible to
long -
term warming than a coral growing in the more open, temperate waters of the reef face.
«The
long -
term baseline temperature is about three tens of a degree (C)
warmer than it was when the big El Niño of 1997 - 1998 began, and that event set the one - month record with an average global temperature that was 0.66 C (almost 1.2 degrees F)
warmer than normal in April 1998.»
January through August of 1998 are all in the 14
warmest months in the satellite record, and that El Niño started when global temperatures were somewhat chilled; the global average temperature in May 1997 was 0.14 C (about 0.25 degrees F) cooler
than the
long -
term seasonal norm for May.
Fact # 1: Carbon Dioxide is a Heat - Trapping Gas Fact # 2: We Are Adding More Carbon Dioxide to the Atmosphere All the Time Fact # 3: Temperatures are Rising Fact # 4: Sea Level is Rising Fact # 5: Climate Change Can be Natural, but What's Happening Now Can't be Explained by Natural Forces Fact # 6: The
Terms «Global
Warming» and «Climate Change» Are Almost Interchangeable Fact # 7: We Can Already See The Effects of Climate Change Fact # 8: Large Regions of The World Are Seeing a Significant Increase In Extreme Weather Events, Including Torrential Rainstorms, Heat Waves And Droughts Fact # 9: Frost and Snowstorms Will Still Happen in a
Warmer World Fact # 10: Global
Warming is a
Long -
Term Trend; It Doesn't Mean Next Year Will Always Be
Warmer Than This Year
Perhaps this is why there are
long term warm / cold climatic cycles, rather
than runaway heat or cold.
I realize that Gavin is writing for fellow climate researchers rather
than such as I who only have a medical doctorate, but surely there is some language, Gavin, that could more clearly, in plain English, describe what his objections, in the main, are, to those who raise some doubts as to the
long -
term climate record and what may have caused previous
warmings.
But even La Nina years now are
warmer than El Niño years several decades ago because of the
long -
term warming caused by carbon dioxide and other heat - trapping gases emitted into the atmosphere.
In this map, blue areas were cooler
than their
long -
term average temperature; reddish ones were
warmer.
(1) The
warm sea surface temperatures are not just some short -
term anomaly but are part of a
long -
term observed
warming trend, in which ocean temperatures off the US east coast are
warming faster
than global average temperatures.
So the actual (very)
long term warming should be higher
than what you would get from sensitivity alone.
To keep to 350 ppm, which already means a
long -
term warmer world, we may have to go to zero or less -
than - zero human emission levels.
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.
A «heatwave» in mid-November caused some parts of the Arctic to be 15C
warmer than usual, with average temperatures for November and December across the Arctic as a whole a full 5C above the
long term average, according to the quickfire analysis of this year's unusual winter.
Since the science and theory linking global
warming in the short
term is much weaker
than the underlying rationale for
long -
term global warning, arguing about short
term trends is dangerous.
Given that
warming over the next 50 years seems inevitable, some serious
long -
term planning is needed — but financial centers seem to have a hard time looking beyond next quarter's results, and the politicians don't seem to look much farther
than the next election cycle.
I don't reject the belief that increased CO2 levels result in global
warming, only that the
long -
term environmental arguments are weaker
than the short -
term economic ones.
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.
Ice - sheet responses to decadal - scale ocean forcing appear to be less important, possibly indicating that the future response of the Antarctic Ice Sheet will be governed more by
long -
term anthropogenic
warming combined with multi-centennial natural variability
than by annual or decadal climate oscillations.»
Given that the cryosphere and oceans are far better
long -
term indicators of changes in Earth's energy balance
than the much more «noisy» troposphere, for anyone to suggest that the
warming of the Earth system has slowed or stopped over the past 10 years, means they are purposely ignoring the far bigger heat sinks of the cryrosphere and oceans, or they simply want to spout nonsense.
* Global temperature for 2007 is expected to be 0.54 °C above the
long -
term (1961 - 1990) average of 14.0 °C; * There is a 60 % probability that 2007 will be as
warm or
warmer than the current
warmest year (1998 was +0.52 °C above the
long -
term 1961 - 1990 average).
But it's the
long -
term temperature that provides this constraint, and if we're both saying that it takes more carbon
than you would get from methane to drive the
long -
term warming,
than we agree.
The actual prevailing view of the paleoclimate research community that emerged during the early 1990s, when
long -
term proxy data became more widely available and it was possible to synthesize them into estimates of large - scale temperature changes in past centuries, was that the average temperature over the Northern Hemisphere varied by significantly less
than 1 degree C in previous centuries (i.e., the variations in past centuries were small compared to the observed 20th century
warming).
Referring to the 15 - year span from 1992 — 2006 when the rate of surface
warming was greater
than the
long -
term trend,
Over the last ten years, global temperatures have
warmed more slowly
than the
long -
term trend.
If I follow him, the author here is suggesting that recently there has been some
longer -
term coherence to the noise, in a sense — that the repercussions of that El Nino are still being felt, that we've been
warmer than the mean trend since 1998, and that we're only now coming back to the trend mean.
More background from Dr. Schmidt on why it's easier to forecast
long -
term warming than short -
term variations: / / j.mp / KWHIW
This correction is naturally small (less
than a tenth of a degree) and hardly changes the
long -
term trend of global
warming — but if you look deeper into shorter periods of time, it can make a noticeable difference.
I know some here will decry that I am not talking about the issues because I do not try to obsfuscate with a discussion of the spot market price of coal vs
long -
term contracts, or use of coal in locations other
than Kansas, or Al Gore's footprint, but the issue of Global
Warming IS politics (non-ratification of Kyoto and negative flag - waving ads about politicians who oppose coal), it IS public relations («Clean Coal», cleanest coal - fired plants, surface mining and mountain - top reoval rather
than strip mining, etc.), and it IS about misrepresentation (Peobody framing the debate as coal vs NG when it is really coal vs every other energy source), and it IS about greed (the coal industry doing everything it can to scuttle every other energy alternative).
From what I see from the Global Historical Climatology Network (GHCN) of land temperatures and the Comprehensive Ocean - Atmosphere Data Set (COADS) of SST data, temperatures there were higher around the 1930's
than now, and there is not much
long term warming trend, except for the past few years.
Honestly, anybody who claims that «there has been global cooling or that global
warming has halted since 2000 (or whatever)» really does not understand climatic trends nor the difference between a
long -
term underlying trend vs. short -
term fluctuations which have a larger magnitude (in both directions)
than the trend.
By 2027, increasing
long -
term trend (forced by tuning to RCP8.5) overwhelms solar cycle such that every year is
warmer than the last (again, no accounting for volcanoes, PDO etc..)
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.
Habitable, of course, but it would appear that the world will be changing quite substantially — and the
long -
term effects may be more significant
than «global
warming.»
Efforts to solve global
warming by GHG emissions reductions strategies, rather
than GHG replacement strategies, can not realistically succeed over the short -
term or the
long -
term or any
term, ever - unless the mandated reductions are so drastic that in effect they would require carbon - free alternatives for nearly all GHG sources.
MW found recent warmth to be unusual in a
long -
term context: they estimated an 80 % likelihood that the decade 1997 - 2006 was
warmer than any other for at least the past 1000 years.
The scientific community has also known for some time that the predicted future global
warming in most climate models (more
than 2 degrees C.) would probably be well above the
long -
term average temperature present at any time during the Holocene.