Sentences with phrase «of oceanic cycles»

Not exact matches

Seasonal weather fluctuations also depend on factors such as proximity to oceans or other large bodies of water, currents in those oceans, El Nino / ENSO and other oceanic cycles, and prevailing winds.

Paul Dirmeyer, a professor in the department of atmospheric, oceanic and earth sciences at George Mason University who was not involved in the study, notes: «Green et al. put forward an intriguing and exciting new idea, expanding our measures of land - atmospheric feedbacks from mainly a phenomenon of the water and energy cycles to include the biosphere, both as a response to climate forcing and a forcing to climate response.»

Carbonates are important constituents of marine sediments and are heavily involved in the planet's deep carbon cycle, primarily due to oceanic crust sinking into the mantle, a process called subduction.

Mouchet, A., and L. François, 1996: Sensitivity of a global oceanic carbon cycle model to the circulation and to the fate of organic matter: Preliminary results.

The consensus is that several factors are important: atmospheric composition (the concentrations of carbon dioxide, methane); changes in the Earth's orbit around the Sun known as Milankovitch cycles (and possibly the Sun's orbit around the galaxy); the motion of tectonic plates resulting in changes in the relative location and amount of continental and oceanic crust on the Earth's surface, which could affect wind and ocean currents; variations in solar output; the orbital dynamics of the Earth - Moon system; and the impact of relatively large meteorites, and volcanism including eruptions of supervolcanoes.

The month - long sea campaign across the Pacific on the research vessel Falkor will monitor the diversity of oceanic phytoplankton, microscopic plant - like organisms, and their impact on the marine carbon cycle.

Including littoral, wetland, and mangrove ecosystems, to seagrass beds interspersed with lagoonal reefs, to the outer barrier reef platform and oceanic atolls, this ecological gradient provides for a full complement of life - cycle needs, supporting critical spawning, nesting, foraging, and nursery ecosystem functions.

«The climate patterns responsible for the expected above - normal 2007 hurricane season continue to be the ongoing multi-decadal signal (the set of oceanic and atmospheric conditions that have spawned increased Atlantic hurricane activity since 1995), warmer - than - normal sea surface temperatures in key areas of the Atlantic Ocean and Caribbean Sea, and the El Nino / La Nina cycle»

Our findings have significance for global carbon cycling, oceanic carbon sequestration, and the cellular biology of coccolithophores.

These variables include volcanic outgassing, Malankovich cycles, tectonic plate movements, solar variability, meteor impacts, comet tails, albedo, oceanic circulation, topography, a variety of hidden threshold effects, biological evolution and human technology.»

Based on findings related to oceanic acidity levels during the PETM and on calculations about the cycling of carbon among the oceans, air, plants and soil, Dickens and co-authors Richard Zeebe of the University of Hawaii and James Zachos of the University of California - Santa Cruz determined that the level of carbon dioxide in the atmosphere increased by about 70 percent during the PETM.

Also, as it relates to the AGW discussion, since the oceanic tidal cycle has such a long duration, wouldn't this cycle be irrelevant, since AGW has only taken hold over the last 150 years and has such a high rate of temperature increase?

As the LIA lasted only a few centuries, wouldn't the oceanic tidal cycles be either irrelevant, or at least not individually responsible for the occurrence of the LIA?

If so, I think we want to include tightly coupled chemical and biological processes, in that case — for example, the chemical fate of atmospheric methane over time, the effects of increasing atmospheric CO2 on oceanic acid - base chemistry, and the response of the biological components of the carbon cycle to increased temperatures and a changing hydrologic cycle.

They say that their research shows that much of the warming was caused by oceanic cycles when they were in a â $ ˜warm modeâ $ ™ as opposed to the present â $ ˜cold modeâ $ ™.

Additionally the oceanic warming and cooling cycles introduce constant, rapid and substantial changes not yet reflected in any models and which invalidate any averaged global estimates of the planetary heat budget.

Thus, these microscopic bacteria perform a huge function in helping determine the oceanic ecosystem response to the cycling of carbon under climate change.

Fossil fuel consumption rates will slowly diminish over the coming decades as fossil fuels are gradually depleted, and the resultant atmospheric and oceanic CO2 is predicted by IPCC modelers to END glaciation cycles and thus, to open much of Canada and Siberia to greatly improved agriculture and forestry.

«There are many natural cycles that rely on severe weather and the precipitation it brings,» said Qinghong Zhang, professor of atmospheric and oceanic sciences, Peking University, lead author of the study, who conducted this research while on sabbatical at Penn State.

And as mentioned above, by dawn the combined effect of clear skies and oceanic overturning has lost all of the heat of the previous day, and the cycle starts over again.

Before it is safe to attribute a global warming or a global cooling effect to any other factor (CO2 in particular) it is necessary to disentangle the simultaneous overlapping positive and negative effects of solar variation, PDO / ENSO and the other oceanic cycles.

Geomagnetic storms hit the Arctic, induce strong currents, disturbing the Earth's field and feed back into the oceanic currents, releasing some of the stored heat during the previous cycle (with less geomagnetic input):

By calculating the running total departing from this figure in a simple integration I found that combined with the ~ 60 oceanic cycles (also solar influenced), I could reproduce the temperature history of the last 150 years quite accurately.

Geomagnetic storms hit the Arctic, induce strong currents, disturbing the Earth's field and feed back into the oceanic currents, releasing some of the stored heat during the previous cycle (with less geomagnetic input): http://www.vukcevic.talktalk.net/Spc.htm

We also need to identify all the separate oceanic cycles around the globe and ascertain both the current state of their respective warming or cooling modes and, moreover, the intensity of each, both at the time of measurement and in the future.

What is even more remarkable, is the fact that common frequencies seen in the two data sets [i.e. the flux optical depth anomaly and the SOI index] are simply those that would be expected if ENSO phenomenon is a resonant response of the Earth's (atmospheric / oceanic) climate system brought about by a coupling between it and the Earth's forced (18.6 year Nodical Lunar Cycle) and unforced (1.2 year Chandler Wobble) nutations.

It will be hard to identify because, as I have mentioned in my other articles, the filtering of the solar signal through the various oceanic cycles is neither rapid nor straightforward.

On balance the evidence shows that solar and oceanic variations are more likely the cause of recent observations of warming in the air than increasing CO2 in the air but the issue can soon be resolved by observing the global air temperature changes that occur during and after the extended cycle 23 and the probable weak cycle 24.

Scientists studying oceans demonstrate that the recent warming, to the end of the last century, is part of the natural cycle of oceanic oscillations and predict a thirty year cooling phase.

In fact that point of transition will itself vary over time depending on whether, at any given moment, the oceanic cycles are working against or in support of the TSI changes.

The natural cycles can not be reasonable removed until it is known what in hell drives them, how long they last, what sort of feedbacks do they create independently and among other cycles, how they interact with CO2 and other first order anthro - forcings that alter the earths surface, atmospheric and oceanic physiobiochemistry.

So where are the researchers of old who went about studying flora and fauna populations tied to oceanic / land temperature cycles?

In some way, that's the engine where all the other variations must be hanged (specially variations in albedo because of clouds - maybe connected with solar cycles as other authors are trying to prove -, variations in albedo because of sea ice extention, linked with the oceanic currents - as in the «stadium wave» that was presented by Curry and others, etc., variations in heat exchange between atmosphere and oceans, and so on.

The close linkage between the oceanic and terrestrial water cycles motivated Li et al. to explore whether salinity signatures can be utilized as a predictor of terrestrial precipitation.

Once the sign of the solar effect on the stratosphere is reversed it becomes possible to propose a system of climate change arising simply from the latitudinal shifting of the air circulation systems in response to competing forces from variable oceanic and solar cycles.

A complete planetary oceanic cycle involving all the separate ocean cycles would take longer and it seems that all the ocean cycles act out of phase for most of the time and so further complicate the issue.

There are also a number of effects which can have a large impact on short - term temperatures, such as oceanic cycles like the El Niño Southern Oscillation or the 11 - year solar cycle.

It takes decades (even centuries) for (deep) oceanic heat transport to manifest at the surface so we see a combination of short - term heat manifestation as a result of the 11 yr solar cycle and longer - term variation.

Even that model will soon be out - of - the - money when air temperatures follow the oceanic cycle / sunspot cycle composite eventually.

My own opinion is an internal oceanic cycling independent of the ENSO / PDO mechanism.

The reason for a reduced CO2 rate of rise was probably not due to a reduction in emission rates, but it may have reflected carbon cycle feedbacks that slightly altered the balance between atmospheric CO2 and terrestrial and oceanic sinks.

All those effects (GHGs, solar and oceanic) operate by changing the speed of the water cycle which speed responds instantly to changes in the atmospheric heights.

It seems to the writer that spreading global oceanic cycles of up to 30 years in length across 3 solar cycles results in a close enough match to fit temperature observations over the past few hundred years and especially since 1961.

Thus a decline in solar energy will have an immediate effect if it occurs at a time when the overall balance of all the oceanic oscillations is negative as now (2007 to date) when the end of solar cycle 23 is significantly delayed and the late start of cycle 24 suggests a weaker cycle than we have had for some time.

The main omissions in current climatology are to ignore the oceanic role in setting and maintaining AND CHANGING the Earth's temperature and failing to recognise that the speed of the hydro cycle changes in response to those oceanic forcings.In 1988 when this all started no one acknowledged the significance of ENSO events globally or the existence of 30 year phase shifts let alone a 500 year ocean cycle.

It isn't just (pick one) CO2, nor «solar activity,» nor ENSO, nor PDO, nor AMO, nor oceanic sequestering, nor human activity, nor natural cycles, nor still coming out of the Little Ice Age (talk about «lag»!

This article makes use of recent findings about the relatively short decadal or multi decadal (20 to 30 years) oceanic oscillations that, the writer contends, are short enough to bring the time scales involved in oceanic changes into line with the solar cycles of 11 years or so.

For example, there are oceanic cycles like the El Niño Southern Oscillation (ENSO, comprised of El Niño and La Niña events), an 11 - year solar cycle, and particulates released during volcanic eruptions which cause short - term cooling by blocking sunlight.

You must calculate the greenhouse affect on the warming / lack of warming in the oceanic hydrological cycle.

So do CO2 cycles, except the oceanic evaporation of CO2 occures about 600 years AFTER solar heating.