Sentences with phrase «over decades to millennia»

The current warming trend is of particular significance because most of it is extremely likely (greater than 95 percent probability) to be the result of human activity since the mid-20th century and proceeding at a rate that is unprecedented over decades to millennia.1 Earth - orbiting satellites and other technological advances have enabled scientists to see the big picture, collecting many different types of information about our planet and its climate on a global scale.

Read / Purchase the Report Climate Stabilization Targets: Emissions, Concentrations, and Impacts Over Decades to Millennia (2011) Emissions of carbon dioxide from the burning of fossil fuels have ushered in a new epoch where human activities will largely determine the evolution of Earth's climate.

Click here to obtain permission for Climate Stabilization Targets: Emissions, Concentrations, and Impacts over Decades to Millennia.

Climate Stabilization Targets: Emissions, Concentrations, and Impacts over Decades to Millennia

Climate Stabilization Targets: Emissions, Concentrations, and Impacts over Decades to Millennia (National Academies Press, 2011).

«Many of the observed changes are unprecedented over decades to millennia,» begins the report, which summarizes the worldwide changes worldwide wrought by climate change and its likely future effects.

Climate Stabilization Targets: Emissions, Concentrations, and Impacts Over Decades to Millennia, a new report released by the National Research Council (the operational arm of the National Academy of Sciences) on July 16, starkly highlights the long - term global consequences of present - day... Continue reading →

See the recent NAS 2011 report on «Climate Stabilization Targets: Emissions, Concentrations and Impacts over Decades to Millennia» for example.

Scientists warn of «unequivocal» climate change that is «unprecedented over decades to millennia.»

Now, scientists say they are certain that «warming in the climate system is unequivocal and since 1950 many changes have been observed throughout the climate system that are unprecedented over decades to millennia.»

July 19: Dr. Stephen Schneider passed away unexpectedly in London • July 17: The Polar Science Center observes anomalous drop in Arctic ice volume • July 16: The National Academy of Sciences released a summary report on climate stabilization targets pertaining to emissions, concentrations, and impacts over decades to millennia.

Copies of Climate Stabilization Targets: Emissions, Concentrations, and Impacts Over Decades to Millennia are available from the National Academies Press; tel. [phone] or 1-800-624-6242 or on the Internet at http://www.nap.edu.

Some of these control variables have a regularity within broad limits and the planet responds over decades to millennia with a broad regularity in changes of ice, cloud, Atlantic thermohaline circulation and ocean and atmospheric circulation.

Over that time, scientists have observed changes to the environment that are «unprecedented over decades to millennia.»

This report, «Climate Stabilization Targets: Emissions, Concentrations, and Impacts Over Decades to Millennia,» provides a fresh degree - by - degree guide to impacts on river flows, rainfall, coasts and other factors that matter enormously over the next few decades as human populations crest.

Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia.

Since the 1950s many of the observed changes are unprecedented over decades to millennia.

We wanted to retrospectively analyse how much the regional climate temporally varies over decades to millennia,» explains Dr. Thomas Laepple from the Alfred Wegener Institute.

Not exact matches

Streams of endless craving, clinging, dreaming, flowing day and night, midnights, years, decades, centuries, millennia, streams of tears, of pledging, of waitings - from all over the world, from all corners of the world - carried us of this generation to the Wall.

If this sport was only about entertainment, then we'd have won the league 6 or 7 times over the last decade, as our on - field and off - field antics have given the media enough ammo to last the remainder of the millennium.

Where CO2 takes centuries to millennia to warm the planet, methane is its cousin on steroids, working quickly over decades before decaying into less virulent gases.

This is due to the fact that it has the strongest potential to warm the globe in the long - run based on its long lifetime in the atmosphere (ranging from decades to centuries, and a tail end that extends to millennia, and with many climate impacts occurring over these slow timescales).

While these numbers represent an improvement from twenty years ago, they have actually remained almost completely static over the past decade, suggesting that the post-Cold War march to democratization tapered off in the first years of the new millennium.

Rather, excess CO2 returns toward baseline at a multitude a different rates, with chemical equilibration in the ocean occurring over decades (depending on depth), ocean carbonate buffering through sediment dissolution requiring centuries to millennia, and eventual restoration of carbonate sediment levels by terrestrial weathering occurring over hundreds of thousands of years — a long «tail» that can account for as much as 20 to 40 percent of CO2 excess in the estimates described by David Archer et al in CO2 Atmospheric Lifetimes.

Beever said he was most surprised to find groups of animals disappearing over decades, rather than in centuries or millenniums, as they have during climatic swings of the distant past.

The first is climate inertia — on very many levels, from fossil lock - in emissions (decades), ocean - atmospheric temperature inertia (yet more decades), Earth system temperature inertia (centuries to millennia) to ecological climate impact inertia (impacts becoming worse over time under a constant stress)-- all this to illustrate anthropogenic climate change, although already manifesting itself, is still very much an escalating problem for the future.

Thus even there, a new equilibrium is reached in a few decades (for extra CO2 over current land occupation) to millennia (for ice sheet retraction and plant spread).

In recent decades, a number of groups have tried combining sets of these proxy records together to construct long - term estimates of global temperature change over the last millennium or so.

At the risk of oversimplifying, the effects of groundwater storage can be differentiated between shallow - aquifer effects that modulate global sea level on year to year and decade to decade timeframes, versus deep aquifer effects that modulate sea level trends over centuries and millennia.

The heat has brought on a «Great Thaw,» with landscape and ecological changes that used to take millennia now happening over decades.

I hypothesized here «that upwelling in the Pacific Ocean is modulated by solar activity over periods of decades to millennia — with profound impacts on communities and ecosystems globally.

Were the hypothesis that warming will increase at least 1C / decade averaged over a millennium at 95 % confidence, nineteen times in twenty, given the noise in the signal, all other things being equal, we'd first need 17 years at least to get some kinda sketchy data, and then could begin calculating from the set of subsequent running or independent 17 year spans (a different calculation for each, depending on the PDF) the probability that a -20 C decade would be consistent with a +1 C / decade hypothesis.

«It is exceptionally unlikely that we would be seeing a record year, during a record warm decade, during a multi-decadal period of warmth that appears to be unrivaled over at least the past millennium — if it were not for the rising levels of planet - warming gases produced by fossil fuel burning.»

Additionally, archival M. californianus shells exist due to the cadre of researchers that have studied at Tatoosh Island over the past several decades and also from the Makah tribe who have utilized the island for millennia [14].

From changes over a millennium at least — the cool Pacific state seems likely to persist for a decade or so yet.

It is exceptionally unlikely that we would be seeing a record year, during a record warming decade, during a multi-decadal period of warmth that appears to be unrivaled over at least the past millennium if it were not for the rising of planet - warming gases produced by fossil fuel burning.»

Ice cores collect air samples over a protracted interval, ranging from a few decades to a few millennia.

Although I have not seen El Padre and La Madre (the feminine noun still demands the feminine form) used for periods of increased frequency and intensity of ENSO events — it is perhaps not a bad usage if the terms are defined properly as the dominance of one ENSO state over another over decades to millennia.

This is a current limitation of the models when confronted with, as yet unexplained, real world climate variations occurring over periods of decades to millennia.

Based on the findings from wide - ranging studies of community variation (eg, why Aboriginal teen suicide and Aboriginal employment levels vary hugely from band to band; why seniors die during heat waves in some neighbourhoods and not others; why some watershed communities maintain sustainable agriculture over a millennium while others do not; why the United States biogenetic technology industry is now concentrated in only three places, compared with thirty areas a few decades ago) there is now a strong evidentiary base revealing common underlying characteristics of groups, at the nongovernmental level, that successfully address these challenges.

Despite increased advocacy and research foci on providing EBT's for children over the past two decades, the number of children who go untreated continued to increase over this millennium (CDC, 2013; MHA, 2013; NCCP, 2014; U.S. Census Bureau, 2015).