Sentences with phrase «stable climate period»

This corresponded to a wetter and more stable climate period than the 7th century.

This time was also a stable climate period.

The stable climate periods that are indicated on the Mann Hockey stick.

Not exact matches

Notably, the rise and expansion of both the Indus Valley civilization (from about 5350 years to about 4600 years ago) and the Vedic civilization (from about 3450 years to about 3100 years ago) occurred during periods when climate was relatively warm, wet, and stable.

It is also the longest period of globally stable climate and sea level in at least the last 400,000 most recent years of seesaw between glaciation and warmer times.

The explanation for this is thought to be that a stable climate over a long period of time is able to foster both.

It appears that political fragmentation, sociopolitical instability and warfare occurred during the unstable climate periods, while the growth of strong, stable, successful states were favored during stable climatic intervals.

So in order to constrain the climate sensitivity from the paleo - data, we need to find a period under which our restricted subsystem is stable — i.e. all the boundary conditions are relatively constant, and the climate itself is stable over a long enough period that we can assume that the radiation is pretty much balanced.

On your other point, yes, the Holocene had been a period of remarkably stable climate.

This was a relatively stable climate (for several thousand years, 20,000 years ago), and a period where we have reasonable estimates of the radiative forcing (albedo changes from ice sheets and vegetation changes, greenhouse gas concentrations (derived from ice cores) and an increase in the atmospheric dust load) and temperature changes.

Burning all fossil fuels, if the CO2 is released into the air, would destroy creation, the planet with its animal and plant life as it has existed for the past several thousand years, the time of civilization, the Holocene, the period of relative climate stability, warm enough to keep ice sheets off North America and Eurasia, but cool enough to maintain Antarctic and Greenland ice, and thus a stable sea level.

What we witness here are both climates and weather features changing before our eyes in the form of what to us may seem a freak event — but what is actually part of a dangerous transition period away from the stable climates of the Holocene.

However, human civilization developed in a period of relatively stable climate.

An analysis of the GISP2 ice core record from Greenland reveals that abrupt climate events appear to be paced by a 1,470 - year cycle with a period that is probably stable to within a few percent; with 95 % confidence the period is maintained to better than 12 % over at least 23 cycles.

For example — you said — How about the period between the medieval warm period and the little ice age for a period that the climate was stable?

How about the period between the medieval warm period and the little ice age for a period that the climate was stable?

Similarly, a colder climate with generally decreased humidity q O could be closer to the critical threshold, which might be the reason for less - stable monsoon circulations during glacial periods.

During the Little Ice Age phase 1 (LIA 1 — AD 1400 — 1620), the abundant occurrences of wetland plant (Cyperaceae) and diatom frustules imply less flood events under stable climate conditions in this period.

Geological records tell us that Earth's climate has been far from stable, and has swung between warm and cold periods.

There are more than two features of the climate system in the period of climatology, and many of those features have been stable.

To an Earth - system scientist the difference between the Quaternary period (which includes the Holocene) and the Neogene, which came before it, is not just what was living where, or what the sea level was; it is that in the Neogene the climate stayed stable whereas in the Quaternary it swung in and out of a series of ice ages.

(26) In a 1974 followup, they spoke more boldly of stable periods interrupted by catastrophic «discontinuities,» when «dramatic climate change occurred in a century or two at most.»

If you're a fan of living on a planet with a stable climate, this is the ultimate good news: The period of rapidly increasing greenhouse gas emissions may be over.

Analysis of Earth's history helps reveal the level of greenhouse gases needed to maintain a climate resembling the Holocene, Creation, the period of reasonably stable climate in which civilization developed.

The expected response to a step increase in CO2 is to move from the relatively stable Holocene climate through a period of rapid (in geological terms) change to a new, relatively stable climate with a higher overall temperature and somewhat different circulation and rainfall patterns.

By stripping out the known changes due to global warming over that period - and recalculating the harvests using a «climate stable» crop model - the team came up with crop - yield numbers that would have applied, if global warming hadn't intervened.

A comparison of significant climate perturbations for the period from 1850 through 1990 is shown in Fig. 4, in terms of the estimated energy that each has added to or subtracted from a stable climate system.

Atmospheric CO2 during the Last Interglacial was comparable to the pre-industrial Holocene and reasonably stable, which prevents the period being a good analogue for future climate.

Chris Colbert (86) and all those who use the argument that climate has always changed naturally, and that there is no «ideal» stable climate, overlook, deliberately or naively, a very important fact: Earth's climate has in fact been remarkably stable for the past 10000 years, long enough that every single thing we know as civilization, including agriculture and all technology beyond simple stone and bone tools, has been developed during that period.

Where response patterns are reasonably stable over time, this ratio can be maximised in a climate change scenario by using long (30 - year or more) averaging periods.

Likewise, the 50 — 60 year cycle in climate is not of stable period.

The 30 - y period 1951 — 1980 with relatively stable climate is sufficiently long to define a climatological temperature distribution, which is near normal (Fig. 9, Left), yet short enough that we can readily see how the distribution is changing in subsequent decades.

I certainly do not think that comet showers are more common than we think or that the climate is so stable that only in the face of such a drastic change could affect sudden climate change, but we certainly can not rule out a period of sensitivity to a barrage of comets during one or two time periods.

If it turned out that rapid climate change events are caused by comets, it would imply the climate system is far more stable than we thought, that abrupt climate change events are not part of the inherent variability of climate during glacial periods.