Sentences with phrase «human timescales»

Any subsequent recovery is on such a long timescale as to make the die - back effectively irreversible on human timescales of the next 1 — 2 centuries.»

Importantly, he pointed out that human beings were now carrying out a large - scale geophysical experiment of a kind that could not have happened in the past or be reproduced in the future - an allusion, perhaps, to the growing realisation of the finite, one - off nature of the fossil fuels, being as they are a non-renewable resource over human timescales.

«One of the great challenges in astronomy is that some of the most important phenomena occur on astronomical timescales, yet astronomers are generally limited to much shorter human timescales,» said co-author Keivan Stassun, professor of physics and astronomy at Vanderbilt.

On human time scales, methane is certainly an important greenhouse gas, and so what's done is to arbitrarily limit the time horizon of the calculation to something like human timescales.

So loss of either of these ice sheets would indeed be an effect with «no return», at least on any reasonable human timescale.

In another 20 years, they will be gone, and they won't come back on any sort of meaningful human timescale.

When suddenly you switch from human timescales to (paleoclimatically relevant) geological timescales — that is literally a 100,000 - 1,000,000 zoom difference — you get to legitimate comparisons.

Meanwhile, since you think that human timescale events of no consequence, I hope you're logically consistent and don't wear your seatbelt, see your doctor, and that you smoke like a chimney and drink like a fish.

The report says it is «very likely» that the past three decades have all been warmer than any time in the past 800 years; that we could see almost 9 °C of warming by 2300; and that «a large fraction of climate change is largely irreversible on human timescales».

The sun has little effect on global temperatures over human timescales, she says, although — perhaps confusingly — it does have a relatively strong effect on some regions, particularly Europe (New Scientist, 25 September 2010, p 10).

Besides, our rate of technological advance is so great on human timescales that simply waiting will bring us closer to what can take us to Mars.

The issues on human timescales are human - made.

Genetic mutations build up and don't seem to cause that much change in human understanding and on the human timescale but they exactly and precisely lead to what we see and define as «punctuated equilibrium.»

The rationale for a UBI is that, on a human timescale, this process doesn't happen fast enough.

But over the last 30 years, 1987A has shown us cosmic change on a human timescale.

These effects are essentially irreversible on a human timescale.

Catastrophic failure of volcanic slopes is very rare on a human timescale — though far more common than the potential for a large asteroid or comet to have a damaging collision with the earth.

A large fraction of climate change is thus irreversible on a human timescale.»

«Jump dispersal helps us remember that events that are rare on human timescales can be common over geological timescales, and that biodiversity might be structured largely by these rare chance events.»

While weather changes fast on human timescales, climate changes fairly slowly.

But Baker suggested that the world also needs new proteins to meet new challenges that loom on the human timescale, such as the diseases of old age, dwindling energy supplies, and a warming planet.

«Our next goal is to acquire detailed information about such climate tipping points on human timescales, decades to a century,» van der Bilt says.

The draft report says it is «very likely» that the past three decades have all been warmer than any time in the past 800 years; that we could see almost 9 °C of warming by 2300; and that «a large fraction of climate change is largely irreversible on human timescales».

Solar variability on human timescales is the 9 - 14 year (nominally 11) cycle.

This implies that while we are gathering additional information, we are also experiencing climate phenomena that are essentially irreversible on human timescales.

Postponing any meaningful mitigation action until the shit hits the fan comes with considerable risk, because many changes in climate are not reversible on human timescales.

CO2 works cumulative (apart from the seasonal fluctuation — which is essentially nature breathing in (northern hemisphere summer) and out (northern hemisphere winter)-RRB--- so more or less by definition we will not witness this graph go down — ever — not on the human timescale.

There is however also a timescale in between the human timescale and that of macro scale species evolution.

Her results suggest that continuing to emit carbon dioxide in the hope of being able to remove it from the atmosphere later could consign our oceans to changes that are irreversible on human timescales.

On extremely long timescales of hundreds of millions of years, the output of the sun has changed significantly; this is of no urgent concern on human timescales.

Scientists at Columbia University's Lamont - Doherty Earth Observatory and the University of Illinois at Urbana - Champaign have ended a nine - year debate over whether the Earth's inner core is undergoing changes that can be detected on a human timescale.

In my own coverage of worst - case climate scenarios, I've tried to focus on the human timescale: What's the worst that we might reasonably expect to transpire while we (or our children) are still alive?

Bio-related sources have a sink term, whereas fossil sources do not (at least not on human timescales).

Confident that the climate was self - regulating on any human timescale, scientists readily dismissed Arrhenius's peculiar speculation about global warming from fossil fuels.

But this least common multiple could be so large — centuries or even millennia — that the seasons would appear random on a human timescale.