Sentences with phrase «in natural ocean oscillations»

The retreat of Greenland's glaciers has been largely due to intruding warm waters driven by changes in natural ocean oscillations.

Not exact matches

Looking at shifts in Manley's winter temperatures from year to year, he says, gives a good reading of important natural cycles that influence climate, such as changes in ocean circulation like the North Atlantic Oscillation.

Both real - world observations and the team's simulations reveal that the abnormally strong winds — driven by natural variation in a long - term climate cycle called the Interdecadal Pacific Oscillation — have, for the time being, carried the «missing» heat to intermediate depths of the western Pacific Ocean.

He believes that changes in ocean circulation have warmed the Atlantic and increased hurricane activity in the past decade and that this is simply the result of normal oscillation in natural climate cycles.

The El Niño Southern Oscillation is a natural fluctuation of ocean temperatures in the equatorial Pacific that can give rise to El Niño and La Niña, which drive droughts and floods from South East Asia and Australia to the Americas.

The goal is to capture natural variations in the climate, like changes in ocean circulation or features like the El Niño Southern Oscillation, that are swamped by the signal of human - caused warming when looking out to the end of the century.

The first collection of papers establishes that (a) decadal and multi-decadal ocean circulation patterns (AMO, PDO, NAO, ENSO) have significantly modulated precipitation and temperature changes in recent decades, and the second collection of papers confirm that (b) natural ocean oscillations are, in turn, modulated by solar activity.

The Atlantic Multidecadal Oscillation (AMO), Pacific Decadal Oscillation (PDO), North Atlantic Oscillation (NAO), and El Niño - Southern Oscillation (ENSO) have all been found to significantly influence changes in surface air temperature and rainfall (climate) on decadal and multi-decadal scales, and these natural ocean oscillations have been robustly connected to changes in solar activity.

Natural climate variability of the Arctic atmosphere, the impact of Greenland and PBL stability changes K. Dethloff *, A. Rinke *, W. Dorn *, D. Handorf *, J. H. Christensen ** * AWI Potsdam, ** DMI Copenhagen Unforced and forced long - term model integrations from 500 to 1000 years with global coupled atmosphere - ocean - sea - ice models have been analysed in order to find out whether the different models are able to simulate the North Atlantic Oscillation (NAO) similar to the real atmosphere.

«The current evidence strongly suggests that: (a) hurricanes tend to become more destructive as ocean temperatures rise, and (b) an unchecked rise in greenhouse gas concentrations will very likely increase ocean temperatures further, ultimately overwhelming any natural oscillations.»

The ocean oscillations cited in these stories have been raised by the global warming skeptics for the last ten years to explain what we saw between the mid» 70's and 2000 was nothing more than a natural cycle.

But efforts to tease out the impact of human - driven global warming in the region are complicated by the big influence around the Bering Sea of natural variations in ocean conditions, including the Pacific Decadal Oscillation.

This cooling is the result of natural long - term swings in ocean surface temperatures, particularly swings in the Interdecadal Pacific Oscillation or mega-El Niño - Southern Oscillation, which has lately been in a mega-La Niña or cool phase.

Our main conclusion was that a), we had, in fact, gone back to a busy period in the Atlantic, Gulf of Mexico, and the Caribbean, and b), it was caused by a natural fluctuation in the Atlantic Ocean and the atmosphere, called the Atlantic multi-decadal oscillation.

Most scientists attribute this «pause» in warming to natural climate cycles that have a cooling effect on the planet, especially ocean oscillation cycles.

The Earth's climate can certainly fluctuate from year to year due to natural forces (including oscillations in the Pacific Ocean, such as El Niño).

The Earth's climate can certainly fluctuate from year to year due to natural forces (including oscillations in the Pacific Ocean, such as

Although global warming appears to have taken a breather over the past decade and a half, the leveling off of average global temperatures is likely just a temporary phenomenon that is due to other climate influences from the sun's radiance level to natural temperature oscillations in the Pacific ocean.

Previous large natural oscillations are important to examine: however, 1) our data isn't as good with regards to external forcings or to historical temperatures, making attribution more difficult, 2) to the extent that we have solar and volcanic data, and paleoclimate temperature records, they are indeed fairly consistent with each other within their respective uncertainties, and 3) most mechanisms of internal variability would have different fingerprints: eg, shifting of warmth from the oceans to the atmosphere (but we see warming in both), or simultaneous warming of the troposphere and stratosphere, or shifts in global temperature associated with major ocean current shifts which for the most part haven't been seen.

Despite this increasing greenhouse gas - induced warming of the oceans, the ocean doesn't warm in a linear manner due to a number of factors, one of these being a natural decadal - scale variation in the way heat is mixed into the oceans by winds - the Interdecadal Pacific Oscillation (IPO).

One of the prime suspects for this has been an increase in trade winds which help to mix heat into the subsurface ocean - part of a natural oscillation known as the Interdecadal Pacific Oscillaoscillation known as the Interdecadal Pacific OscillationOscillation (IPO).

A new article co-authored by the other of us (Michael Mann), shows that natural ocean oscillations have recently acted to temporarily slow the warming of the Earth's surface temperatures, in combination with a relatively quiet sun, and active volcanoes.

With the recent decline in solar flux and the shift to cool phases of ocean oscillations, natural climate change suggests that although glacier retreat and sea level rise will likely continue over the next few decades, the rates of sea level rise and glacier retreats will slow down.The next decade will provide the natural experiment to test the validity of competing hypotheses.

They can see the 60 year cycle in temperatures, most likely caused by the AMO and / or north Altantic deep ocean heat content oscillations, but they refuse to «build - in» the AMO as a natural climate variable.

Before the industrial period, the natural variations in the total amount of effective solar radiative forcing reinforce the thermal contrasts both between the ocean and continent and between the Northern and Southern Hemispheres resulting in the millennium - scale variation and the quasi-bicentennial oscillation in the GM index.

The near - linear rate of anthropogenic warming (predominantly from anthropogenic greenhouse gases) is shown in sources such as: «Deducing Multidecadal Anthropogenic Global Warming Trends Using Multiple Regression Analysis» «The global warming hiatus — a natural product of interactions of a secular warming trend and a multi-decadal oscillation» «The Origin and Limits of the Near Proportionality between Climate Warming and Cumulative CO2 Emissions» «Sensitivity of climate to cumulative carbon emissions due to compensation of ocean heat and carbon uptake» «Return periods of global climate fluctuations and the pause» «Using data to attribute episodes of warming and cooling in instrumental records» «The proportionality of global warming to cumulative carbon emissions» «The sensitivity of the proportionality between temperature change and cumulative CO2 emissions to ocean mixing»

Natural variations in climate such as fluctuations in solar activity, volcanic activity, or ocean oscillations like El Niño have all contributed to global warming and global cooling.

But natural ocean oscillations have also raised temperatures, and regards to understanding both 20th century warming events in the Arctic, ocean oscillations offer the superior explanation.

I say my conclusion was «not unreasonable» because Dr. Scafetta, in a posting at WattsUpWithThat today, has also concluded that, once the natural 60 - year cycles of the great ocean oscillations are accounted for (and it may be these cycles that express themselves in changes in cloud cover such as that which Dr. Pinker had identified), the anthropogenic component in global warming is considerably less than the IPCC imagines.

«You force it at the same frequency as the natural oscillation, and the same thing happens in the ocean,» he said.

Regional circulation patterns have significantly changed in recent years.2 For example, changes in the Arctic Oscillation can not be explained by natural variation and it has been suggested that they are broadly consistent with the expected influence of human - induced climate change.3 The signature of global warming has also been identified in recent changes in the Pacific Decadal Oscillation, a pattern of variability in sea surface temperatures in the northern Pacific Ocean.4

The El Nino Southern Oscillation is a natural — as opposed to man - made - future of the Pacific Ocean, as areas of the Pacific periodically warm then cool every few years, causing significant sea level rises and falls every few years in step with the co-oscillations of the ocean and atmospOcean, as areas of the Pacific periodically warm then cool every few years, causing significant sea level rises and falls every few years in step with the co-oscillations of the ocean and atmospocean and atmosphere.

Anyone who has studied climate for even a short while should know that there are natural fluctuations in global temperature which have little or no bearing on long - term trends — mainly the solar cycle and ocean oscillations.

We think that the bump in temperatures in 1935 - 45 (common in both the ocean AND the land) is evidence of an natural oscillation or a response to unknown forcing, clearly not AGHGs.

One of these — stretching from Cape Hatteras to Miami — was driven by the overlapping effects of El Niño, that periodic blister of heat most obvious in the eastern Pacific, and the North Atlantic Oscillation, another entirely natural periodic shift in atmosphere and current that can pile up the ocean waters.