Sentences with phrase «been short term variations»

But even if it had, there are short term variations in temperature associated with El Nino and La Nina events and other «weather» which imply that CO2 is not the only factor.

Not exact matches

The point was to show how much variation in performance there's been historically over shorter time frames compared with a much narrower range in long - term returns.

There have been wide variations among private sector forecasters about future economic developments, both in the short and medium term.

This idea is a very short - term variation of the same concept.

They have shown that there is substantial genetic variation in nature for both long - term seasonal acclimation and short - term acclimation associated with rapid extreme weather events.

While the atmosphere is mainly causing climate variations on shorter time scales, from months to years, the longer - term fluctuations, such as those on decadal time scales, are primarily determined by the ocean.

In a detailed study of more than 200 years» worth of temperature data, results backed previous findings that short - term pauses in climate change are simply the result of natural variation.

Of course, while short - term changes in sea level can be predicted fairly accurately based on the motions of the moon and sun, it is a lot harder predicting the ups and downs of the average global surface temperature — there is a lot of noise, or natural variation, in the system.

But our main point does not depend on that and is robust: with any model and any reasonable data - derived forcing, the observed 20th Century warming trend can only be explained by anthropogenic greenhouse gases, while other factors can explain the shorter - term variations around this trend.

Climate variations are made up of both long - term trends, such as in response to greenhouse gases and aerosols, and shorter term fluctuations due to natural variability, such as the El Nino Southern Oscillation.

The best known shorter - term variations are sunspot cycles, especially the Maunder minimum, which is associated with the coldest part of the Little Ice Age.

The short - term variations are dominated by ENSO but also can be influenced by large tropical volcanic eruptions (such as occurred in 1963, 1982 and, markedly, 1991), so the years after those eruptions are anomalously cool.

Mr. Trenberth was lamenting the inadequacy of observing systems to fully monitor warming trends in the deep ocean and other aspects of the short - term variations that always occur, together with the long - term human - induced warming trend.

Once a natural short - term climate variation from the natural paleoclimate baseline is established, only then can the potential Anthropogenic influence be further investigated.

Younger investors are willing to accept more short - term variation in exchange for higher returns.

The short - term variations might scare you but they are not the end of the world.

Short - term variations are just noise and you should not look at your balances too often.

In order for a tradable item to be a store of value, the amount of variation in value in the short - to intermediate - term versus other items that has to be limited.

A variation of this scam is that a con - artist will simply post a pic and info about your home or apartment and list it as short - term accommodation, typically to dupe tourists and vacationers out of their money.

1) if your asset allocation is based on a 10 year average P / E ratio, won't short term (say within one month) variations not be reflected?

Risk is not short - term variation, unless your time horizon is short.

Over short periods, I think Glenn is right — it smooths out variations... but if one only has a short term investing horizon, then equities wouldn't be the best place for investments.

Muller's only additional take on it is that the * short - term * variations in the global temperature variations.

There should be far less short term variation and none of the problems associated with the locations of land - based thermometers.

Your contention on noise doesn't make sense, it is only by averaging over short - term variations that the long - term trend (climate) emerges.

Also, on the subject of noise: How can the short term variations in temperature be considered «noise»?

In general it's recognised that prediction of the so far unpredictable phenomena (El Nino's, La Nina's, the fine details of ocean circulation oscillations, volcanos and any solar variation outwith the 11 year solar cycle) that provide short term modulation of any trend is likley to be unfruitful at present.

Obviously in the short term the ZnJ effects will give rise to variations in the rate of movement of the glacier, but it is the longer term effects relating to energy transfer that worry me.

The reason for the discrepancy is not that specific scientific findings are in dispute but that the warming is only recently emerging in a significant manner from the various natural short and long term background variations.

For instance, the regression of the short - term variations in annual MSU TLT data to ENSO is 2.5 times larger than it is to GISTEMP.

Sure — but their attribution to specific causes is going to be different than for long term trends and the shorter they get the more important interannual variations and ENSO is going to be relative to the long - term drivers.

More background from Dr. Schmidt on why it's easier to forecast long - term warming than short - term variations: / / j.mp / KWHIW

There are other factors affecting global temperature besides greenhouse gases, some of which have a profound impact on short - term variations.

Much of the evidence, however, is based on short - term experiments that ignore long - term variation in how species and ecosystems respond.

Many would think such a cooling outcome to be extremely unlikely (in the deep psyche impossible), but until the models have the ability to predict the short term variations occurring over the time interval of one year, we don't know how well the models have estimated natural variability.

Yes there's correlation with other variables, including the PDO, but that correlation is in the short - term variations.

Clarifying what drives short - term wiggles in climate conditions, and whether they can be predicted with confidence, is a vital enterprise as ever more people crowd onto planet Earth, many in poor places with little resilience to today's climate variations, let alone those that could be amplified by a building greenhouse effect.

But our main point does not depend on that and is robust: with any model and any reasonable data - derived forcing, the observed 20th Century warming trend can only be explained by anthropogenic greenhouse gases, while other factors can explain the shorter - term variations around this trend.

long term natural cycle: http://www.vukcevic.talktalk.net/CET-NVa.htm short term natural variation: http://www.vukcevic.talktalk.net/GISS-spec.htm random walk is just a copout, nature is ruled by the cause - consequence relationships, it is within our capacity to understand, we are on the way, but not there yet.

Second: solar intensity on short term is inversely correlated with low cloud cover (see the reference here), which intensifies the variation and probably the long - term trend too.

That is why the annual CO2 increase in the atmosphere also varies greatly each year, and this short - term variation is not mainly caused by variations in our emissions (so a record CO2 increase in the atmosphere in an El Niño year does not mean that human emissions have surged in that year).

Actually, there's a meta - analogy here: just as the primary analogy tells us that short - term variation is basically distraction, minute examination of the details of that analogy exemplify another kind of distraction.

Experts say shorter - term variations are meaningless in the climate context, particularly if looking for a link to the greenhouse buildup.]

It is not that short - term variation isn't interesting.

Short - term variations in ocean heat uptake, such as the anomalous deep ocean warming of late, are due to changes in the vertical & horizontal distribution of heat in the ocean — mostly the wind - driven ocean circulation.

We now know that to be false — not because of the natural long - term variations in climate (to which you refer and which water planners could safely ignore), but to new, short - term dramatic changes that result from human - induced climate change.

That's too short to infer a robust conclusion, anyway, and maybe short - term variations toward high temperature are not representative of the long - term warming induced by GHGs.

I noted how the overall rate in some studies, even on the scale of meters per millennium, «is not one of these uber - catastropes,» but that how much variation can occur within a century remains saddled with uncertainty, producing an «ugly mix of long - term certainty and short term murkiness.»

Over very long time periods such that the carbon cycle is in equilibrium with the climate, one gets a sensitivity to global temperature of about 20 ppm CO2 / deg C, or 75 ppb CH4 / deg C. On shorter timescales, the sensitivity for CO2 must be less (since there is no time for the deep ocean to come into balance), and variations over the last 1000 years or so (which are less than 10 ppm), indicate that even if Moberg is correct, the maximum sensitivity is around 15 ppm CO2 / deg C. CH4 reacts faster, but even for short term excursions (such as the 8.2 kyr event) has a similar sensitivity.

Increasing CO2 causes a gradual long - term warming trend which is smaller than the short - term variations.