Sentences with phrase «co2 than present»

It is a proven fact that plants, including trees and all our food crops, are capable of growing much faster at higher levels of CO2 than present in the atmosphere today.

For a start hydrogen from natural gas, without considering the host of other technologies coming along very nicely with far lower CO2, is way lower in CO2 than the present use of petrol, so you are talking about a very large decrease even pending lower CO2 technologies.

My comment about the unlikeliness of 0.8 deg is about the overall warming, which by 2100 is much more likely to be dominated by CO2 than the present warming.

Not exact matches

Battisti and Naylor, however, assumed greenhouse gas emissions lower than the present output and the fact that more carbon dioxide (CO2), the most common greenhouse gas, will boost plant growth may not help.

So we've already increased CO2 by more than from the last glacial maximum to the present interglacial.

Given the present energy mix that means Mantovani adds more than 3,000 metric tons of CO2 to the atmosphere each year.

At present, atmospheric CO2 has reached more than 387 parts per million (ppm), well above the preindustrial figure of 280 ppm.

This dynamic time for East Antarctic glaciers occurred when atmospheric temperatures and atmospheric CO2 levels were similar to or higher than present day.

His «we do not know of a time with permanent ice at the poles and CO2 above 1000pmmv» (except, of course, prior to the big thaw in snowball Earth), and the present rate of increase of atmospheric CO2 being c. 10x greater than previous mass extinctions as far as we know (albeit the total mass being less) are deeply worrying.

Ice ages have occurred in a hundred thousand year cycle for the last 700 thousand years, and there have been previous periods that appear to have been warmer than the present despite CO2 levels being lower than they are now.

2015 Current Location, Waiting Room, Minneapolis 10th Baltic Biennial of Contemporary Art, Szczecin Aquí hay dragones (Here be Dragons), La Casa Encendida, Madrid Regular Expressions, 221A, Vancouver Ocean of Images: New Photography 2015, at MoMA, New York Bunting, Chemould Prescott Road, Mumbay Transparencies, Bielefelder Kunstverein and Kunstverein Nürnberg Triple Canopy presents Pattern Masters, Performance at Whitney Museum of American Art, New York HPSCHD 1969 > 2015 / Live Arts Week IV, Mambo, Bologna, Italy The Secret Life, Murray Guy, New York Night Begins the Day: Rethinking Space, Time, and Beauty, Contemporary Jewish Museum, San Francisco Im Inneren der Stadt, Künstlerhaus Bremen When we share more than ever, MKG Museum, Hamburg Cool / As a state of mind, MAMO, Marseille Group presentation at Art Cologne, with Chert, Berlin Good luck with your natural, combined, attractive and truthful attempts in two exhibitions, Crac Alsace, Altkirsch Mijn Vlakke Land, FoMu, Antwerp more Konzeption, Conception now, Museum Morsbroich, Leverkusen Tongue Stones, Pioneer Works, Brooklyn, New York 2014 Requiem for the Bibliophile, Museum of Contemporary Art Santa Barbara, CA Scars of Our Revolution, Yvon Lambert, Paris Kochi - Muziris Biennal, Fort Kochi, India Crossing Brooklyn, Brooklyn Museum, Brooklyn, New York Ways of Working, According to an Office Desk, Upominki, Rotterdam AGITATIONISM, EVA International 2014, curated by Bassam El Baroni, Ireland's Biennial, Limerick City Unseen Presence, IMMA, Dublin #nostalgia, Glasgow International 2014, CCA, Glasgow To Meggy Weiss Lo Surdo, Happy Hours, CO2 gallery, Turin Canceled: Alternative Manifestations & Productive Failures, The Orseman Gallery, Smith College, Northampton, Massachusetts Simultáneo, La Tallera, Cuernavaca, México And I laid Traps for the Troubadours who get killed before they reached Bombay, Clark House Initiative, Bombay Flag Stavanger, curated by Randi Grov Berger and co-presented by Entrée, Kunsthall Stavanger, Norway video screening 25, ZERO, Milan 2013 Only to Melt, Trustingly, Without Reproach, curated by Tevz Logar, Skuc Gallery, Ljubljana Editionshow, Chert, Berlin I've Lost My Marbles, Totàl, Athens And So On And So Forth, curated by Margit Sade Lehni, Centre for Contemporary Art Riga, Latvia The Space Between Us, Courtesy, St - Ouen Please Come to the Show: Part II (1980 — Now), organised by David Senior, MoMA Library, New York Canceled: Alternative Manifestations & Productive Failures, Freedman Gallery, Albright College, Reading, PA Stranded Travelers, Atelier 35, Bucharest Just what is it that makes today so familiar, so uneasy?

If it takes 100 plus years to double the concentration of CO2, and if the equilibrium response is a 2C increase (Pierrehumbert, «Principles of Planetary Climate», p 623), and if the increased CO2 produces increased vegetation and crop growth, then the present rate of development of non-fossil fuel power and fuel generation is more appropriate than an Apollo type project or attempt to get rid of all fossil fuel use by 2050 starting now as fast as can be done.

A few things are unequivocal, perhaps (doubling from the present concentration of CO2 will take 140 years [give or take]; the idea that the changes in climate since 1880 have been in the aggregate beneficial; it takes more energy to vaporize a kg of water than to raise its temperature by 1K; ignoring the energy cost of water and latent heat transport [in the hydrologic cycle] leads to equilibrium calculations overestimating the climate sensitivity), but most are propositions that I think need more research, but can't be refuted on present evidence.

The reason why CO2 trumps natural variability IN THE LONG RUN is not becuase it is, at present, much larger than energy fluctuations due to natural variability, but because it's sign is consistent.

And this paper is suggesting that the present day CO2 feedback may be stronger than what it would have been if we'd done this experiment at many times in the past.

Am I correct in calculating that the present rate of growth in the anthropenic forcing from CO2 from fossil fuel consumption is currently somewaht greater than a milliwatt / year, or about 4 microwatts per day?

Analysis by Collins of climate model simulations indicated that increased CO2 may result in ENSO events becoming larger in amplitude and more frequent than under present conditions.

There's the electric SUV approach, which uses as much or more energy than at present, but gets it from less CO2 - intensive sources such as the electric grid.

So, while at present more CO2 is absorbed than is released, this can not be taken for granted, especially as the oceans warm.

Arctic temperatures were ∼ 19 °C warmer during the Pliocene than at present, while atmospheric CO2 concentrations were ∼ 390 ppmv.

«This perspective article focuses on intervals in time in the fossil record when atmospheric CO2 concentrations increased up to 1200 ppmv, temperatures in mid - to high - latitudes increased by greater than 4 °C within 60 years, and sea levels rose by up to 3 m higher than present.

Could anything be more out of date, backward - looking, or antiquated in spirit than the Carlin report's repackaging of yesterday's denialist illusions and pseudoscientific nonsense about climate — fantasies that have been shot down time and again, that don't have a melting Greenland glacier's chance in a warming climate when exposed to the light of reason, yet which have been presented to the world as if they were a brilliant refutation of the CO2 - global warming link by the sharpest analytical minds in the field of climatological research?

In the last 600 million years, since the start of the Cambrian Period, only the Carboniferous Period and our present Quaternary P -LCB- eriod have seen CO2 levels less than 400 ppm.

By later in the Carboniferous, CO2 levels had declined to about 350 ppm, a little less than present CO2 concentrations.

Anthropogenic emissions of CO2 are increasing, and accelerating, and current proposals for reducing them present no plausible scenario in which emissions will actually peak and decline in anywhere near the time frame that is required to avoid what are generally considered «dangerous» levels of CO2 (although points 1 - 3 above suggest that the current levels are more dangerous than has been generally believed).

In Barton's criticism of Gore he also points out that CO2 has sometimes been much higher than it is at present.

In your paper (co-authored with Wenju Cai) presented to the Pan Evaporation Workshop at the Academy of Science in Canberra in late 2004, which I attended, you used the SRES A2 scenario projections to reach the conclusion that «By 2100, the equivalent CO2 reaches a level that is more than three times the level of 1870 (concentration ppm).»

If the med - evil warming period was warmer than the present, without the presence of elevated anthropogenic CO2 in the atmosphere, then their «CO2 as poison» theory dies on the vine.

Energy transfer in the lower troposphere is a typical case, where changes in convective processes (including transport of moisture) restore the balance very efficiently leading to little direct influence from changes in CO2 concentration as long as the concentration is not much lower than the present one.

A composite of real studies appearing in Nature and Proceedings of the National Academies of Sciences, the study presented evidence that CO2 dissipates from the atmosphere much more sluggishly than scientists had previously anticipated.

In order to determine the rate of historical responsiveness to atmospheric levels of CO2, it is essential to use high - resolution SI data that (i) have not been significantly affected by influences of environmental conditions other than CO2values, and (ii) that can be calibrated against the (1958 — present) Mauna Loa record of increases of atmospheric CO2 levels.

Ice ages have occurred in a hundred thousand year cycle for the last 700 thousand years, and there have been previous periods that appear to have been warmer than the present despite CO2 levels being lower than they are now.

Even during the years 1900 to present, the sun's activity correlates with temperatures better than CO2 correlates with temperatures (see chart below).

The end of the present decade (2000 — 2010) will be cooler than the beginning, even as CO2 concentration continues to increase steadily.

It achieves this objective primarily through the weekly online publication of CO2 Science, and which over the years has presented more than 5,000 synopses of peer - reviewed scientific journal articles, original research, and other educational materials germane to the debate over carbon dioxide and global change.

To project future emissions from human activities, we used the SRES higher (A1FI) and lower (B1) emissions scenarios that capture to some extent the uncertainty in future climate due to human decisions [22], with CO2 emissions ranging from slightly less than present - day levels up to four times present - day levels by 2100.

Present CO2 emissions per person in China are now equal to those of Italy and higher than France, although the sectoral shares of households, transport, power generation, manufacturing industry and the service sector are quite different.

Quantitatively, Vasskog et al. estimate that during this time (the prior interglacial) the GrIS was «probably between ~ 7 and 60 % smaller than at present,» and that that melting contributed to a rise in global sea level of «between 0.5 and 4.2 m.» Thus, in comparing the present interglacial to the past interglacial, atmospheric CO2 concentrations are currently 30 % higher, global temperatures are 1.5 - 2 °C cooler, GrIS volume is from 7 - 67 % larger, and global sea level is at least 0.5 - 4.2 m lower, none of which observations signal catastrophe for the present.

The idea is problematic however, since even for Neoproterozoic insolation, you kick over into a snowball at about 3x present CO2, and the situation is even worse for early Earth insolation, which is some 20 - 25 % lower than today.

Radon is radioactive, and if it were present at 400 ppm, collisions of neutrons with neighboring air molecules would cause more warming than an equivalent concentration of CO2 by absorbing relatively weak infrared waves / photons.

The authors also published their own response with Carbon Brief, pointing out that they «present no evidence in our paper to suggest that future CO2 - induced warming under any emissions scenario will be lower than the projections given in AR5 [the Intergovernmental Panel on Climate Change's fifth assessment report]».

2 - that mitigation of CO2 will keep us from experiencing a climate more dangerous than the present in the future.

We have a solid 10,000 years of recent climate change to consider, and it shows several periods of greater warming than present, none explained by increased atmospheric CO2, or more obviously, by human activity.

Claims now proven false include; • an increase in CO2 precedes a temperature increase; • current atmospheric levels of CO2 are the highest on record; • and pre-industrial levels of CO2 were approximately 100 parts ppm lower than the present 385 ppm.

Research presented here and at other credible locations has shown CO2's effect to be logarithmic with possible offsetting by negative feedbacks rather than amplified greatly by positive feedback mechanisms.

Now, with all the fuss about modern CO2 forcing, an MWP warmer than the present ought to make us think.

There are at least 10 threats to civilization that are more of a «clear and present» danger than CO2, including:

Based on proxy records from ice, terrestrial and marine archives, the LIG is characterized by an atmospheric CO2 concentration of about 290 ppm, i.e., similar to the pre-industrial (PI) value13, mean air temperatures in Northeast Siberia that were about 9 °C higher than today14, air temperatures above the Greenland NEEM ice core site of about 8 ± 4 °C above the mean of the past millennium15, North Atlantic sea - surface temperatures of about 2 °C higher than the modern (PI) temperatures12, 16, and a global sea level 5 — 9 m above the present sea level17.

The oceans are buffered by sediments and volcanic rocks on the sea floor and even in past times when atmospheric temperature and CO2 were far higher than at present, there were no acid oceans.

For example, if the CO2 - ice threshold for present - day Earth is 500 ppm, the equivalent threshold during the Late Ordovician (450 million years ago)-- when the solar constant was about 4 % less than current levels — would be 3000 ppm.