Sentences with phrase «much cooler periods»

The earth has endured much warmer and much cooler periods in a cyclical manner for millions of years without our help.

Not exact matches

The plan met so much opposition when it was first proposed that the Park District stood back for a monthlong cooling - off period.

The data showed that, in comparison to today, the Atlantic Ocean surface circulation was much weaker during the Little Ice Age, a cool period thought to be triggered by volcanic activity that lasted from 1450 - 1850.

«The cooler Venus is perfectly plausible, but without more detailed modeling it's hard to say how much longer the wet period would have lasted,» comments planetary scientist Jeffrey Moore of NASA's Ames Research Center in Mountain View, California.

While a 16 - year - period is too short a time to draw conclusions about trends, the researchers found that warming continued at most locations on the planet and during much of the year, but that warming was offset by strong cooling during winter months in the Northern Hemisphere.

Observing multiple orbits of cooler planets with longer orbital periods will take much more time.

This may have occurred because the continents were clustered around the equator, and so a warm Earth would be much more vulnerable to slight cooling trends that trigger a Snowball period.

Periods of volcanism can cool the climate (as with the 1991 Pinatubo eruption), methane emissions from increased biological activity can warm the climate, and slight changes in solar output and orbital variations can all have climate effects which are much shorter in duration than the ice age cycles, ranging from less than a decade to a thousand years in duration (the Younger Dryas).

Miami Vice and Nine DP Dion Beebe can't decide if he's going for Michael Mann's minimalism or Rob Marshall's period bloat this time, and the result, strangely enough, is derivative of nothing so much as Cool World.

Neither a cooling - off period following a confrontation between striking Oakland, Calif., teachers and district officials nor renewed negotiations last week brought the two sides much closer to an agreement.

Despite an air temperature firmly in the 80s and roughly 50 percent humidity, none of the handful of Demons present needed so much as a cool - off period despite continuously making run after run for several hours — and this after being subject to this form of abuse for several days over the course of a week.

The body can cool itself over a short period of time and return to a normal temperature as long as cooling mechanisms are not overwhelmed by too much intense heat.

These months are the start of the rainy season in Sabah and although Sipadan and Mabul might not experience much rain, the air and water temperature can be a little cooler and visibility can be low during this period.

Everyone, not just game players but game makers, are busy enjoying a much deserved cooling off period after recent game accomplishments.

Although he knew Andy Warhol and considered him among his favorite artists (along with de Kooning), Brainard's works are often humorous and earnest, in contrast to the cool detachment of much of the Pop art of the period.

Actually, there is some interesting work being done by Matt Huber of Purdue, following up on some earlier ideas of Emanuel's, suggesting that the role of TCs in transporting heat from equator towards the poles may be more significant than previously thought — it also allows for some interesting, though admittedly somewhat exotic, mechanisms for explaining the «cool tropics paradox» and «equable climate problem» of the early Paleogene and Cretaceous periods, i.e. the problem of how to make the higher latitudes warm without warming the tropics much, something that appears to have happened during some past warm epochs in Earth's history.

Neither is there much change in (cooling aerosol) SO2 emissions in the past years around the equator (China, India), compared to the previous period.

Over the preceding period the humanity has had much time to adjust to new circumstances and modest additional warming before later cooling may be of little significance.

Ernst Beck has complied tens of thousands of analyses of early measurements of atmospheric CO2, and concludes that CO2 levels were much higher during the 1930's warm period than the generally - accepted levels; CO2 dropped sharply during the cooling from ~ 1946 to ~ 1977; and CO2 increased since 1977 due to the recent warming, and is now at similar levels to the early 1940's.

You may, of course, turn out to be correct that there will be a a period of cooling in the next few decades, but this is very much a fringe view, and not part of the mainstream consensus.

It will stay warm for a few hundred years, not much warmer, not much cooler, up and down some with the 60 year cycle, then after a few hundred years of this more snowfall, it will get colder, like it always does after every warm period.

Hi Judith, without getting into pointless discussion of «how much», the hadCrut3 data in the poster definitely shows some cooling in that period, which I why I made that comment.

An objective post on this would have started by showing the annual temperature trend, such as this with 2014 short - term averages added in http://www.woodfortrees.org/plot/hadcrut4gl/mean:12/from:1950/plot/hadcrut4gl/from:1970/trend/plot/hadcrut4gl/from:2014/mean:3 We would note that the trend is 0.16 C per decade since 1970, that the temperature mostly does not follow the trend but oscillates equally to about 0.1 C on each side, and that 2014 has returned to the long - term trend line in much the same way as several other cooler periods have.

And in terms of our current interglacial period, there has much warmer periods during this time, and that the long trend over 8000 year period has been a slight cooling.

'' that there have been periods of warming and cooling in the 20th century, and that the net outcome has been a higher temperature at the end of the century than at the beginning; and (2), that it is not clear exactly how much that increase has been, because of measurement problems.»

A more valid criticism is that I'm actually taking out too much data, as the eruptions are only partially responsible for cooling in that period — for instance there was a La Niña episode in 1984

That makes it quite doubtfull that the same aerosols would have had much impact in the previous period of temperature standstill / cooling.

But in the 2001 IPCC report, the Medieval Warm period disappeared and became much cooler than the late 20th century.

This warm period, much like the roman and medieval warm periods, will bump against the upper bound, opening the Arctic and creating massive snows that will bump it down again until the ice volume on land becomes massive enough to advance and cool us again.

Steven At the onset of the medieval Warm Period around 900 - 1000CE, from much cooler preceding centuries, Why did it warm?

I am an ACC adherent, a «lukecoldist», and it seems likely that she is in a period of multi-decadal cooling; I distinctly recall much warmer winters in days gone by, and new lows in temperature seem more frequent than statistically likely.

'' The authors attribute the cooling from 7,000 years ago until the Medieval Warm Period to changes in Earth's orientation toward the sun, which affected how much sunlight fell on both poles.

But across much of Europe, Canada, and the United States, models estimate that the loss of shading and evaporative cooling shortened the return period for extremely hot, dry summers significantly: from every ten years to every 2 - 3 years.

The various kinds of evidence examined by the panel suggest that the troposphere actually may have warmed much less rapidly than the surface from 1979 into the late 1990s, due both to natural causes (e.g., the sequence of volcanic eruptions that occurred within this particular 20 - year period) and human activities (e.g., the cooling of the upper part of the troposphere resulting from ozone depletion in the stratosphere).

Instead, there were some isolated periods of strictly regional cooling separated by as much as hundreds of years.

Measurement of changes however is much more precise at about 1W / m2 from peak to trough — some 0.25 W / m2 cooling at the surface over the period of ARGO ocean warming.

Of the temperatures are going down, the faux skeptics trust the record but if we have the warmest 12 month period in during the much beloved «cooling» period then it must be wrong or distortion of data.

The warm period lasted until 117,000 years ago, when things abruptly cooled, much as in the Younger Dryas — but it stayed down in the cool - and - dry mode.

Fourthly can you also expalin why the earth's reflective index hasn't changed much or has actually increased slighty (meaning cooling) in the periods when it should have falling if your theory is correct?

By contrast, the period 1946 to 1975 showed significant cooling in the North Atlantic, as well as much of the Northern Hemisphere, and warming in much of the Southern Hemisphere.

The reason given in Briffa 2001 for their selection of a certain reconstruction is discussed: >> > The selection of a single reconstruction of the ALL temperature series is clearly somewhat arbitrary... The method that produces the best fit in the calibration period is principal component regression... << >> ``... we note that the 1450s were much cooler in all of the other (i.e., not PCA regression) methods of producing this curve...» << <

And that there is good evidence for a medieval warm period and much cooler times, for example during the 15th century and early 19th century the Thames River froze over it was so cold.

Anyway you think of it, these long periods of cooling pretty much sucked for everyone.

There have also been extensive periods during which the climate was much cooler than it is now.

But then during periods when those natural cycles are cooling, it's enough to pretty much balance out the warming from CO2.

Clearly human activities can affect climates — we all grew up learning that the desertification of much of North Africa was due to goats, and we know that some local climates are determined by human activities in the region — but human activity is unlikely to have caused the Viking period warming, the great cooling after 1300, the Little Ice Age, and such; and the warming beginning in 1800 or so is very unlikely to have been caused by human activities.

I seriously hope this is NOT the case, however, because the historical record shows that periods of extended cooling would be much more harmful for humanity and our environment that a resumption of the 20thC warming.

Solar forcing is the only known natural forcing acting to warm the climate over this period but it has increased much less than greenhouse gas forcing, and the observed pattern of long term tropospheric warming and stratospheric cooling is not consistent with the expected response to solar irradiance variations.

But the error margins for the period since 2000 mean that for the short period there is a 95 % chance that the trend is as much as warming 0.22 °C / decade or a cooling trend of as much as -0.04 °C / decade.

A sudden condensation of supersaturated vapor may release so much heat that the parcel of air warms more from that than it has cooled over an extended period, but even in this case the main trend is cooling.