He rightly cited the solid scientific consensus showing
significant warming of the climate system, with most global warming in recent decades mainly a result of human activity.
Not exact matches
More than 170 countries agreed early Saturday morning to limit emissions
of key
climate change - causing pollutants found in air conditioners, a
significant step in the international effort to keep global
warming from reaching catastrophic levels.
Trump is poised in the coming days to announce his plans to dismantle the centerpiece
of former President Barack Obama's
climate change legacy, while also gutting several smaller but
significant policies aimed at curbing global
warming.
«Our results indicate that areas
of eastern Texas, Florida, the south - east and mid-Atlantic are areas where rapid population growth, acting in concert with a
warming climate, will lead to a
significant increase in exposure to heat extremes,» says Jones.
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.
While natural sources
of climate variability are
significant, multiple lines
of evidence indicate that human influences have had an increasingly dominant effect on the
climate warming observed since the mid-twentieth century.
One
of the most
significant findings is that high percentages
of Americans — or roughly a third — say that they could easily change their minds about global
warming, said Tom Bowman, president
of the consulting firm Bowman Global Change, who has examined how
climate scientists communicate to the public.
«Using a numerical
climate model we found that sulfate reductions over Europe between 1980 and 2005 could explain a
significant fraction
of the amplified
warming in the Arctic region during that period due to changes in long - range transport, atmospheric winds and ocean currents.
Previous studies by the Cardiff team on
warming effects in the Rivers Wye and Tywi reveal
significant reductions in insect numbers and even an instance
of local species extinction due to
climate change.
So if you think
of going in [a]
warming direction
of 2 degrees C compared to a cooling direction
of 5 degrees C, one can say that we might be changing the Earth, you know, like 40 percent
of the kind
of change that went on between the Ice Age; and now are going back in time and so a 2 - degree change, which is about 4 degrees F on a global average, is going to be very
significant in terms
of change in the distribution
of vegetation, change in the kind
of climate zones in certain areas, wind patterns can change, so where rainfall happens is going to shift.
A
significant proportion
of the loss is attributable to
climate change, which has strengthened destructive tropical cyclones and made surrounding waters
warmer and more acidic.
Including the elevation effects in the model increases the estimated sea - level rise by a small but
significant amount (5 % enhancement
of melt by 2100 and 10 % by 2200 for a
climate warming scenario).
It shows that changes in Earth's
climate and sea level are closely linked, with only small amounts
of warming needed to have a
significant effect on seal levels.
The number
of climate refugees could be
significant, anywhere from 1.4 million to 6.7 million Mexicans, depending on how much
warming actually occurs.
Boulder, Colo., USA: Cretaceous
climate warming led to a
significant methane release from the seafloor, indicating potential for similar destabilization
of gas hydrates under modern global
warming.
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
U.S. Data Since 1895 Fail To Show
Warming Trend LINK WASHINGTON, Jan. 25 — After examining
climate data extending back nearly 100 years, a team
of Government scientists has concluded that there has been no
significant change in average temperatures or rainfall in the United States over that entire period.
Across most
of the continental U.S., winter is the fastest
warming season, and is the only season that has seen
significant warming in each
climate division.
With near - surface waters around South Georgia being some
of the fastest
warming on Earth
climate change poses a
significant threat to this biodiversity hotspot.
Oregon and Washington are the number one and two softwood - producing states in the nation, respectively; 20 these two states plus Idaho produce more than $ 11 billion in primary wood product sales.21 Our review
of existing research suggests the Northwest's forests will experience
significant potential impacts from
climate change, in particular from wildfire — due to both increased drought and to wood damage from pests surviving
warmer winters.
Two examples
of climate extremes include periods
of intense
warm or cool temperatures and
significant wet or dry spells across seasons.
This form
of heating has a
significant warming effect on the
climate, which is cause for concern.
The tight constraint on the lower limit
of climate sensitivity indicates we're looking down the barrel
of significant warming in future decades.
The hypothesis that greenhouse gas emissions have produced or are capable
of producing a
significant warming of the Earth's
climate since the start
of the industrial era is credible, and merits continued attention.
The scientists concluded in the paper that their findings, combined with projected ongoing
warming, show that even if rates
of climate pollution are reigned in, that «may not be sufficient to avoid
significant impacts»
of acidification on coral reef regeneration.
OO An Unusually
Warm Arctic Year: Sign
Of Future
Climate Turmoil with
significant effects on US weather.
Climate changes in past centuries were
significant in some parts
of the world, but they were often opposite (e.g.
warm vs. cold) in different regions at any given time, in sharp contrast with the global synchrony
of 20th century
warming.
The report starts off with a blunt warning: «Man is setting in motion a series
of events that seem certain to cause a
significant warming of world
climates over the next decades unless mitigating steps are taken immediately.»
So the marked early 20th century
warming was likely a mixture
of recovery from volcanic forcing and accumulated (but masked) greenhouse forcing [the 1880 - 1940 [CO2] rise from ~ 290 — ~ 309 ppm was quite
significant (equivalent to nearly 0.3 oC at equilibrium with a mid-range
climate sensitivity)-RSB-.
Of course, at the same time they could include comment addressing the possibility of other factors playing quantitatively significant roles in warming / climate chang
Of course, at the same time they could include comment addressing the possibility
of other factors playing quantitatively significant roles in warming / climate chang
of other factors playing quantitatively
significant roles in
warming /
climate change.
Elevated trace GHG concentrations contributed an estimated positive forcing
of approximately 1.7 — 2.3 W m - 2 (Table S5) in addition to that
of CO2 and produced equilibrium
climate system responses resulting in widespread
significant warming, especially in the high latitudes (Figs. 3 and 4).
Assuming a
climate sensitivity
of 0.7 K / W / m ^ 2, this would contribute less than 0.06 C
of the estimated 0.6 C mean global
warming between the Maunder Minimum and the middle
of last century, before
significant anthropogenic contributions could be involved.»
On the contrary, roughly 80 percent
of HOT is devoted to on - the - ground reporting that focuses on solutions — not just the relatively well known options for reducing greenhouse gas emissions and otherwise limiting global
warming, but especially the related but much less recognized imperative
of preparing our societies for the many
significant climate impacts (e.g., stronger storms, deeper droughts, harsher heat waves, etc.,) that, alas, are now unavoidable over the years ahead.
a
significant number
of climate scientists acknowledge the hiatus in surface
warming, though they feel confident it can be explained; 2.
Climate modeling shows that a
significant part
of this
warming is due to anthropogenic causes.
With the
warming already committed in the
climate system plus the additional
warming expected from rising concentrations
of greenhouse gases in the atmosphere, the Arctic will experience
significant changes during this century even if greenhouse gas emissions are stabilized globally at a level lower than today's.
«Borehole temperatures in the ice sheets spanning the last 6000 years show Antarctica repeatedly
warming when Greenland cooled, and vice versa... The phenomena has been called the polar see - saw... Attempts to account for it have included the hypothesis
of a south - flowing
warm ocean current with a built in time lag... There is (however) no
significant delay in the Anarctica
climate anomaly...
I'm simply questioning the validity
of the hypothesis offered by so many
climate scientists that CO2 emissions from fossil fuels are a
significant factor in global
warming, to the extent that they must be drastically reduced.
Victor (243): I'm simply questioning the validity
of the hypothesis offered by so many
climate scientists that CO2 emissions from fossil fuels are a
significant factor in global
warming, to the extent that they must be drastically reduced.
Actually, there is some interesting work being done by Matt Huber
of Purdue, following up on some earlier ideas
of Emanuel's, suggesting that the role
of TCs in transporting heat from equator towards the poles may be more
significant than previously thought — it also allows for some interesting, though admittedly somewhat exotic, mechanisms for explaining the «cool tropics paradox» and «equable
climate problem»
of the early Paleogene and Cretaceous periods, i.e. the problem
of how to make the higher latitudes
warm without
warming the tropics much, something that appears to have happened during some past
warm epochs in Earth's history.
«The climatic forcings resulting from such solar — terrestrial links may have had a
significant impact on
climate prior to the onset
of anthropogenic
warming».
Thomas Lee Elifritz (# 70), you quote the authors: «The climatic forcings resulting from such solar — terrestrial links may have had a
significant impact on
climate prior to the onset
of anthropogenic
warming».
In fact previous
climate warming after the last ice age did have
significant negative impacts on early human settlements (evidence
of periods
of significant and rapid regional sea level rise).
How many times have we seen someone select two stations «randomly» and see that they don't show
significant warming over a limited range
of time and conclude there's no
climate change?
It is the inertia
of societal infrastructure, the carbon cycle and the
climate that implies that at any point there is a
significant warming that is already «in the pipeline» (and thus very difficult to avoid).
Humans are altering the
climate in diverse ways, a variety
of human
climate forcings are
significant, and the effects
of these forcings need to be responded to, even if the
climate did not
warm.
Subsidary question: as the ocean is quite a big part
of the
climate system, are it's temperature variations sufficiently constraint to corroborate the very interesting conclusion
of Gavin's note: «It's interesting to note that
significant solar forcing would have exactly the opposite effect (it would cause a
warming)-- yet another reason to doubt that solar forcing is a
significant factor in recent decades.»
To me, the more subtle background trend is the
significant one to watch because it's like the long - term
warming of the
climate itself.
«One
of the most
significant signals in the thermometer - observed temperature record since 1900 is the decrease in the diurnal temperature range over land, largely due to
warming of the minimum temperatures...
Climate models have in general not replicated the change in diurnal temperature range well.
The archive shows only scattered uses
of «global
warming» (and little more for «
climate change») into the 1970s, with a
significant rise for «global
warming» after 1975.