Sentences with phrase «century warming conditions»

Vecchi, and I. M. Held, 2008: Simulated reduction in Atlantic hurricane frequency under twenty - first century warming conditions, Nature Geosciences, doi: 10.1038 / ngeo202.

Well, for one thing, the title of the paper: «Simulated reduction in Atlantic hurricane frequency under twenty - first - century warming conditions» (emphasis added).

Not exact matches

Drier conditions, more thunderstorms and warming in the Arctic over the coming century, he says, will make this more likely.

Because El Niño's warmer, drier conditions in tropical regions mimic the effects of climate change expected by the end of the century, those observations may be a sobering harbinger of the tropics» diminishing role as a...

And even for half that warming, ice - free conditions of up to 2 month a year are possible by the late 21st century.»

Projected global warming will likely decrease the extent of temperate drylands by a third over the remainder of the 21st century coupled with an increase in dry deep soil conditions during agricultural growing season.

Because El Niño's warmer, drier conditions in tropical regions mimic the effects of climate change expected by the end of the century, those observations may be a sobering harbinger of the tropics» diminishing role as a buffer for fossil fuel emissions (SN Online: 9/28/17).

With ENSO - neutral conditions present during the first half of 2013, the January — June global temperature across land and ocean surfaces tied with 2003 as the seventh warmest such period, at 0.59 °C (1.06 °F) above the 20th century average.

To investigate cloud — climate feedbacks in iRAM, the authors ran several global warming scenarios with boundary conditions appropriate for late twenty - first - century conditions (specifically, warming signals based on IPCC AR4 SRES A1B simulations).

In the paper Gray makes many extravagant claims about how supposed changes in the THC accounted for various 20th century climate changes («I judge our present global ocean circulation conditions to be similar to that of the period of the early 1940s when the globe had shown great warming since 1910, and there was concern as to whether this 1910 - 1940 global warming would continue.

If the same conditions that caused the storm had occurred in a world without the warming observed over the last century, it would not have been as severe.

Nor can we assume that the next shift will follow the 20th century pattern and be to warmer conditions — indeed it seems safer to assume not as the Sun cools from the modern grand maxima.

As the authors point out, even if the whole story comes down to precipitation changes which favor ablation, the persistence of these conditions throughout the 20th century still might be an indirect effect of global warming, via the remote effect of sea surface temperature on atmospheric circulation.

A long term study of climactic conditions would place the first half of the twentieth century into an exceptionally warm period.

Later on, the condition will become «normal», as warming progresses throughout the end of this century (and we can be sure of that, just not the degree of warming).

[14] Although there is an extreme scarcity of data from Australia (for both the Medieval Warm Period and Little Ice Age) evidence from wave built shingle terraces for a permanently full Lake Eyre during the ninth and tenth centuries is consistent with this La Niña - like configuration, though of itself inadequate to show how lake levels varied from year to year or what climatic conditions elsewhere in Australia were like.

In light of the recent IPCC report released this past week and stating essentially that global warming is a runaway train that can't be stopped for centuries, it may be tempting to give up hope for a brighter future... But like any patient who suffers from a chronic disease that is potentially fatal, not only is education about the condition itself essential, but also what we can do to help mitigate its impact.

That approach, from Katrina forward, was bound to fail, given the variability of conditions year to year and persistent (and non-manufactured) uncertainty surrounding some of the most consequential impacts (for instance, the pace and extent of warming and sea - level rise in this century).

I think we are too conditioned to warming and pauses now to notice that those coolings have been gone for the last century.

â $ œRecent temperatures were the warmest since the fourteenth century, but similar conditions existed intermittently during the period spanning ~ 4000â $ «1000 varve years ago.â $ http://www.geo.umass.edu/climate/papers2/cook2008.pdf Data — http://www.ncdc.noaa.gov/paleo/metadata/noaa-lake-6195.html

Heartland's spokesperson frequently say there is no scientific consensus that most of the global warming of the twentieth century was man - made, or that scientists are able to predict future climate conditions, or, finally, that there is a basis in science or economics for passing laws that would reduce greenhouse gas emissions.

While mitigation climate change is essential adapting to and through centuries of warming is paramount... the stories of animals, plants and people adapting to a warming world express trust in our ability to adjust to changing conditions, even radical ones, and to establish a voice for resilience in uncertain times.

In less than forty years the conditions went from the depths of the Little Ice Age to something comparable to the warmest decades of the twentieth century.

Their reconstruction «shows a succession of warm and cold episodes including peak warmth during Roman and Medieval times alternating with severe cool conditions centred in the fourth and fourteenth centuries.»

However, important issues remain unanswered: Are humans or other natural conditions responsible for the majority of the past century's warming?

There were no globally synchronous multi-decadal warm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between AD 1580 and 1880, punctuated in some regions by warm decades during the eighteenth centwarm or cold intervals that define a worldwide Medieval Warm Period or Little Ice Age, but all reconstructions show generally cold conditions between AD 1580 and 1880, punctuated in some regions by warm decades during the eighteenth centWarm Period or Little Ice Age, but all reconstructions show generally cold conditions between AD 1580 and 1880, punctuated in some regions by warm decades during the eighteenth centwarm decades during the eighteenth century.

Regarding variability, the ISPM fails to mention that the IPCC found that the larger «natural climatic variability» is almost all in the direction of cooler temperatures, relative to «previous estimations», for the past millenium: «The additional variability shown in some new studies [since the Third Assesment Report] implies mainly cooler temperatures (predominantly in the 12th to 14th, 17th and 19th centuries), and only one new reconstruction suggests slightly warmer conditions (in the 11th century, but well within the uncertainty range indicated in the TAR).»

Our reconstruction thus supports the notion of relatively warm hemispheric conditions earlier in themillennium, while cooling following the 14th century could be viewed as the initial onset of the Little Ice Age sensu lato.

Our reconstruction thus supports the notion of relatively warm hemispheric conditions earlier in the millennium, while cooling following the 14th century could be viewed as the initial onset of the Little Ice Age sensu lato.

This means it will take centuries to millennia for deep ocean temperatures to warm in response to today's surface conditions, and at least as long for ocean warming to reverse after atmospheric greenhouse gas concentrations decrease (virtually certain).

Given past non-stationarity, and particularly erratic LIA, a «warm LIA» climate scenario for the coming century that combines high precipitation variability (similar to LIA conditions) with warm and dry conditions (similar to MCA conditions) represents a plausible situation that is supported by recent climate simulations.

This is contrary to the Medieval Climate Anomaly (MCA), which had reduced variability and therefore may be misleading as an analog for 21st century warming, notwithstanding its warm (and arid) conditions.

Rather, we propose the possible development of a «warm LIA» climate scenario for the coming century that combines high precipitation variability (similar to LIA conditions) with warm and dry conditions.

«Climate science» as it is used by warmists implies adherence to a set of beliefs: (1) Increasing greenhouse gas concentrations will warm the Earth's surface and atmosphere; (2) Human production of CO2 is producing significant increases in CO2 concentration; (3) The rate of rise of temperature in the 20th and 21st centuries is unprecedented compared to the rates of change of temperature in the previous two millennia and this can only be due to rising greenhouse gas concentrations; (4) The climate of the 19th century was ideal and may be taken as a standard to compare against any current climate; (5) global climate models, while still not perfect, are good enough to indicate that continued use of fossil fuels at projected rates in the 21st century will cause the CO2 concentration to rise to a high level by 2100 (possibly 700 to 900 ppm); (6) The global average temperature under this condition will rise more than 3 °C from the late 19th century ideal; (7) The negative impact on humanity of such a rise will be enormous; (8) The only alternative to such a disaster is to immediately and sharply reduce CO2 emissions (reducing emissions in 2050 by 80 % compared to today's rate) and continue further reductions after 2050; (9) Even with such draconian CO2 reductions, the CO2 concentration is likely to reach at least 450 to 500 ppm by 2100 resulting in significant damage to humanity; (10) Such reductions in CO2 emissions are technically feasible and economically affordable while providing adequate energy to a growing world population that is increasingly industrializing.

This period has been widely studied because the radiative forcings and boundary conditions are relatively well known and because the global cooling during that period is comparable with the projected warming over the 21st century.

As the earth continues to recover from the abnormally cold conditions of the centuries - long Little Ice Age, warmer temperatures, improving soil moisture, and more abundant atmospheric carbon dioxide have helped bring about a golden age for global agricultural production.

That a simple warming trend throughout the 20th century does not characterise arctic conditions is also confirmed by records of ice cover in the four seas that lie north of Siberia (Kara, Laptev, East Siberian and Chukchi); these show clearly that ice variability in these seas is dominated by a low frequency oscillation of frequency 60 ‐ 80 years that «places a strong limitation on our ability to resolve long term trends».

In 1965 British climatologist Hubert Horace Lamb examined historical records of harvests and precipitation, along with early ice - core and tree - ring data, and concluded that the MWP was probably 1 — 2 °C (1.8 — 3.6 °F) warmer than early 20th - century conditions in Europe.

``... This could imply the cessation of the drier than normal conditions that have generally afflicted southwest North America since the 1997 — 1998 El Niño, as well as the twenty - first - century pause in global warming.

«To investigate cloud — climate feedbacks in iRAM, several global warming scenarios were run with boundary conditions appropriate for late twenty - first - century conditions»

B) A low - range optimistic estimate of 2 °C of 21st century warming will shift the Earth's global mean surface temperature into conditions which have not existed since the middle Pliocene, 3 million years ago.

The two models were run under different conditions set by the 2007 Intergovernmental Panel on Climate Change (IPCC) to study the general pattern of warming in the 20th century.

At best, changes of such magnitude would trigger dramatic re-organization of ecosystems across the globe that would play out over the next few centuries; at worst, extinction rates would elevate considerably for the many species adapted to pre-global warming conditions, via mechanisms described above (inability to disperse or evolve fast enough to keep pace with the extremely rapid rate of climate change, and disruption of ecological interactions within communities as species respond individualistically).

Projected changes in the probability of co-occurring warm — dry conditions in the 21st century.

The convergence of prolonged warming and arid conditions suggests the mid-12th century may serve as a conservative analogue for severe droughts that might occur in the future.

Although the extremely persistent high pressure is at least a century - scale occurrence (8), anthropogenic global warming has very likely increased the probability of such conditions (8, 9).

It does not show an obvious signature of drought in the medieval period, as do the streamflow and DAI records, but there is a multidecadal episode of warm season drought beginning in the 12th century that would have contributed to the overall dry conditions at the time (48).

Taken together, the observed record from California suggests that (i) precipitation deficits are more likely to yield 1 - SD PMDI droughts if they occur when conditions are warm and (ii) the occurrence of 1 - SD PMDI droughts, the probability of precipitation deficits producing 1 - SD PMDI droughts, and the probability of precipitation deficits co-occurring with warm conditions have all been greater in the past two decades than in the preceding century.

Global average warming over the 21st century «will substantially exceed even the warmest Holocene conditions, producing a climate state not previously experienced by human civilizations.»

«It will therefore be prudent to further reduce the flow of anthropogenic [human - created] nutrients to Walden Pond under the warmer, wetter conditions that most climate models project for New England during the 21st century.»