Sentences with phrase «oceanic variability in»

Since 2009, US CLIVAR has collaborated with the OCB Program, whose mission is to study the impact of oceanic variability in the global carbon cycle in the face of environmental variability and change.

Atmospheric and oceanic variability in the Arctic shows the existence of several oscillatory modes.

Not exact matches

The paper... offers a useful framework for which decadal variations in the global (or northern hemisphere) may be explained via large scale modes of oceanic variability.

In most AOGCMs, the variability can be understood as a damped oceanic eigenmode that is stochastically excited by the atmosphere.

It is interesting that the North Atlantic does not play a more important role in this largest - trend case, since it does dominate the oceanic variability on somewhat shorter ~ 20 year time scales in this model.

We suggest that the long - term trends in storminess were caused by insolation changes, while oceanic forcing may have influenced millennial variability.

In fact, they may do so more efficiently than more uniform temperature change; warming one hemisphere with respect to the other is an excellent way of pulling monsoonal circulations and oceanic ITCZs towards the warm hemisphere (the last few years have seen numerous studies of this response, relevant for ice ages and aerosol forcing as well as the response to high latitude internal variability; Chiang and Bitz, 2005 is one of the first to discuss this, in the ice age context; I'll try to return to this topic in a future postIn fact, they may do so more efficiently than more uniform temperature change; warming one hemisphere with respect to the other is an excellent way of pulling monsoonal circulations and oceanic ITCZs towards the warm hemisphere (the last few years have seen numerous studies of this response, relevant for ice ages and aerosol forcing as well as the response to high latitude internal variability; Chiang and Bitz, 2005 is one of the first to discuss this, in the ice age context; I'll try to return to this topic in a future postin the ice age context; I'll try to return to this topic in a future postin a future post.)

«On forced temperature changes, internal variability, and the AMO» «Tracking the Atlantic Multidecadal Oscillation through the last 8,000 years» «The Atlantic Multidecadal Oscillation as a dominant factor of oceanic influence on climate» «The role of Atlantic Multi-decadal Oscillation in the global mean temperature variability» «The North Atlantic Oscillation as a driver of rapid climate change in the Northern Hemisphere» «The Atlanto - Pacific multidecade oscillation and its imprint on the global temperature record» «Imprints of climate forcings in global gridded temperature data» «North Atlantic Multidecadal SST Oscillation: External forcing versus internal variability» «Forced and internal twentieth - century SST trends in the North Atlantic» «Interactive comment on «Imprints of climate forcings in global gridded temperature data» by J. Mikšovský et al.» «Atlantic and Pacific multidecadal oscillations and Northern Hemisphere temperatures»

«Despite recent advances in the state of the global ocean observing system, estimating oceanic variability on basin - wide to global scales remains difficult.

In order to make the most accurate estimates of oceanic variability, it is necessary to combine different types of data into a single consistent field.

«This paper provides an update to an earlier work that showed a foreshadowing of such climate shifts in the time evolution of major Northern Hemispheric atmospheric and oceanic modes of variability [Tsonis et al., 2007].

Sea ice with its strong seasonal and interannual variability (Fig. 1) is a very critical component of the Arctic system that responds sensitively to changes in atmospheric circulation, incoming radiation, atmospheric and oceanic heat fluxes, as well as the hydrological cycle1, 2.

Combining the limitations of this data with the (interannual) variability in atmospheric and oceanic conditions between now and September 2008 leaves a wide range of scenarios open for how sea ice conditions may develop throughout the summer.

This Section places particular emphasis on current knowledge of past changes in key climate variables: temperature, precipitation and atmospheric moisture, snow cover, extent of land and sea ice, sea level, patterns in atmospheric and oceanic circulation, extreme weather and climate events, and overall features of the climate variability.

Together the oceanic upwelling in the north and south Pacific and the movement of atmospheric mass from and to the poles provide almost all of the decadal variability in Earth's climate.

iv) The change in surface pressure distribution to dispose of the effects of more CO2 would be unmeasurable and unnoticeable compared to the observed historical shifts from solar and oceanic variability.

The latitudinal shifting is the negative system response to ANY forcing whether from GHGs or otherwise but in reality mostly from solar and oceanic variability with that from CO2 not measurable.

The oceanic oscillations dominated the 20th Century with a spotted sun dogging them, and driving them; if this new variability of the sunspots presage global cooling, as it did in the Maunder, we may cool for a century or more.

A good place to start in comprehending the high variability of temperatures and sea ice in the Arctic is the recognition that, at those latitudes, the available heat comes primarily from oceanic and atmospheric advection, rather than local thermalization of insolation.

US CLIVAR is collaborating with the ocean carbon and biogeochemistry science community to increase observations and understanding of the coupled physical / biogeochemical processes that maintain the marine ecosystem and oceanic sources and sinks of carbon and predict how they will evolve in response to climate variability and change.

The most likely candidate for that climatic variable force that comes to mind is solar variability (because I can think of no other force that can change or reverse in a different trend often enough, and quick enough to account for the historical climatic record) and the primary and secondary effects associated with this solar variability which I feel are a significant player in glacial / inter-glacial cycles, counter climatic trends when taken into consideration with these factors which are, land / ocean arrangements, mean land elevation, mean magnetic field strength of the earth (magnetic excursions), the mean state of the climate (average global temperature), the initial state of the earth's climate (how close to interglacial - glacial threshold condition it is) the state of random terrestrial (violent volcanic eruption, or a random atmospheric circulation / oceanic pattern that feeds upon itself possibly) / extra terrestrial events (super-nova in vicinity of earth or a random impact) along with Milankovitch Cycles.

The problems we are working on range from basic studies of circulation patterns of water in the ocean and groundwater flow systems to the variability of the oceanic circulation under natural and anthropogenically forced conditions or the transport and transformation of contaminants.

«This paper provides an update to an earlier work that showed specific changes in the aggregate time evolution of major Northern Hemispheric atmospheric and oceanic modes of variability serve as a harbinger of climate shifts.

Interestingly the oceanic timescales tie in nicely with the length of the THC of around 1000 years and the observed levels of solar variability such as MWP to date which is also around 1000 years.

Natural factors such as the Sun (84 papers), multi-decadal oceanic - atmospheric oscillations such as the NAO, AMO / PDO, ENSO (31 papers), decadal - scale cloud cover variations, and internal variability in general have exerted a significant influence on weather and climate changes during both the past and present.

In the meantime, their results have tentatively breathed a small hint of life back into the climate models, basically buying them a bit more time — time for either the observed temperatures to start rising rapidly as current models expect, or, time for the modelers to try to fix / improve cloud processes, oceanic processes, and other process of variability (both natural and anthropogenic) that lie behind what would be the clearly overheated projections.

Despite evidence for a growing sink when globally integrated (Khatiwala et al. 2009, 2013; Ciais et al. 2013; DeVries 2014), this variability, combined with sparse sampling, means that it is not yet possible to directly confirm from surface observations that long - term growth in the oceanic sink is occurring.

Variability associated with these latter processes, generally referred to as natural long - term climate variability, arises primarily from changes in oceanic cVariability associated with these latter processes, generally referred to as natural long - term climate variability, arises primarily from changes in oceanic cvariability, arises primarily from changes in oceanic circulation.

Any variability in oceanic circulation could have strong effects on local, and hence average temperature, even with a fixed energy budget.

Some caution is necessary in implicating the tropical Pacific and North Atlantic as the primary sources of oceanic - forced variability in the global mean temperature.

Increasing attention is being paid to IPCC misrepresentations of natural oceanic variability on decadal scales (Compo and Sardeshmukh 2009): «Several recent studies suggest that the observed SST variability may be misrepresented in the coupled models used in preparing the IPCC's Fourth Assessment Report, with substantial errors on interannual and decadal scales (e.g., Shukla et al. 2006, DelSole, 2006; Newman 2007; Newman et al. 2008).

Environmental fluctuations in redox may reinforce rather than hinder evolutionary transitions, such that variability in near surface oceanic oxygenation can promote morphologic evolution and novelty, followed by innovation, and diversification.

The comment to Table 2 notes: «In general, these historical gauges were designed to monitor the sea level variability caused by El Niño and shorter - term oceanic fluctuations rather than long - term sea level change, for which a high level of precision and datum control is required.»

In this paper, it is shown that coherent large - scale low - frequency variabilities in the North Atlantic Ocean — that is, the variations of thermohaline circulation, deep western boundary current, northern recirculation gyre, and Gulf Stream path — are associated with high - latitude oceanic Great Salinity Anomaly eventIn this paper, it is shown that coherent large - scale low - frequency variabilities in the North Atlantic Ocean — that is, the variations of thermohaline circulation, deep western boundary current, northern recirculation gyre, and Gulf Stream path — are associated with high - latitude oceanic Great Salinity Anomaly eventin the North Atlantic Ocean — that is, the variations of thermohaline circulation, deep western boundary current, northern recirculation gyre, and Gulf Stream path — are associated with high - latitude oceanic Great Salinity Anomaly events.

The AHT and the transport in the oceanic gyres are positively correlated, because the gyre transport responds to the atmospheric winds, so militating against long - term variability involving the wind - driven flow.