Sentences with phrase «perturbations on»

Climate models also take this modulation as input and have demonstrated significant perturbations on tropospheric circulations.

There's still a wide range of variability, because there are perturbations on the constant features imposed by fluctuations of the general circulation.

It shows a small fluctuation in the perihelion / aphelion distances of about 15000 kilometers that are caused by planetary perturbations on a regular cycle.

Note that the influence of industry - wide strikes, the Great Depression in the 1930s and World War II in the 1940s can be seen as perturbations on the general Hubbert Curve.

However, because global warming is always of one sign, a much bigger impact is from the cumulative effects of these radiative perturbations on the climate.

This is why we are not talking about the 33 K issue at all here, just perturbations on the current climate.

[Response: That's a testable proposition — even if it's unlikely to be true given that these are relatively small perturbations on a complex system where you would expect linearity to hold.

She is finishing her Ph.D. program through Murdock University (Australia) on the impact of perturbations on the health and behavior of a critically endangered Australian marsupial called the woylie (or brush - tailed bettong).

Complex questions such as these are addressed by biological systems science, where these results can be used to understand the effects of genetic perturbations on inherited and expressed characteristics in a larger context.

«As powerful as the cycle is, it is also surprisingly susceptible to environmental changes — and humankind is imposing massive perturbations on Amazonia by both cutting down the trees and heating up the air with greenhouse gases, which reduces large - scale moisture transport and precipitation, and end up affecting even the untouched patches of the forests.»

Dr. Christie's research team will further investigate the activity of Purkinje Cells in motor learning and the potential modifications in their activity caused by a perturbation on their behavior.

It starts with sunspots which are a perturbation on the solar output.

CO2 emission by man is The Big Perturbation on Campus.

It is a big enough perturbation on timescales of multiple decades or longer to dominate the temperature pattern on a global scale, despite the existence of chaotic elements responsible for fluctuations in the temperature trend globally that average out, and despite significant unpredictability regionally.

As mentioned above, each member begins from the identical state in 1920, except for a random perturbation on the order of round - off error (10 − 14 K) to the atmospheric temperatures.

To me, this is the sort of approach that requires far more certainty in our understanding of the full climate system than to simply try to reduce our perturbation on the system (which I guess is basically the point of Gavin's rocking - the - boat analogy).

Not exact matches

It is also a fact that if one imposes a small perturbation of some kind in a chaotic dynamic system, its effects on the details of a particular trajectory will not be predictable; but its effects on the averaged behavior of both regular and chaotic trajectories will be more predictable, evident, and broadly understandable in terms of notions of stress and response.

They have been going on for millions of years without much perturbation until humans began to alter the cycle through industrial activity.

«There's a long history of jellyfish really coming into huge numbers, big blooms, with a big effect on ecology, when you have perturbations to the system.»

«If on the other hand the self - interaction timescale is long compared with the perturbation timescale, the disk will warp,» he says.

For example, Earth raises tides on the moon and vice versa, and the planets beyond Uranus were discovered by the gravitational perturbations they exerted on the seven planets that had already been discovered.

«Imagine yourself sitting on top of this perturbation, and you will see this light wave approaching you until it stops.»

By factoring out all known causes of the probe's motion (everything from its flight path around Mars to the movement of the crust on which the tracking station on Earth rests), engineers can isolate the perturbations caused by the cycling of Martian snow or smog.

Specifically, the paper reported that at lunar - resonant orbits, perturbations from the gravitational tug - and - pull exerted on spacecraft by the Moon and Earth are roughly zero, especially if the spacecraft's apogee is about 90 degrees with respect to the Moon.

So far, electrical circuits based on spin waves have not been realised, since it turned out to be impossible to introduce a perturbation in the system large enough to create spin waves.

Our fly - on - the - wall look at scientists poring over data on small perturbations measured with ultrasensitive instruments shows clearly how answers lead to more questions.

The study assesses the food supply available to more than 140 nations (with populations greater than 1 million) and demonstrates that food security is becoming increasingly susceptible to perturbations in demographic growth, as humanity places increasing pressure on use of limited land and water resources.

«Nature gives us these volcanic perturbations and then we can see the impact on climate,» Krotkov said.

Powerful gravitational perturbations from the two stars on the rocky building blocks of planets lead to destructive collisions that grind down the material.

Christian Schneider, a postdoc who is first author on the paper, calls the model the «perturbation model.»

Time can mean many things, but Hillis's machine needs to track a particularly messy version: Earth - surface clock / calendar time, which is based on a byzantine agglomeration of astronomical rotations, orbits, and perturbations of hugely varying lengths, overlaid with arbitrary cultural whims about how to divide it up.

Building on the work that recently earned him a Nobel Prize in Chemistry, a Stanford University researcher used a microfluidic single - molecule trap to capture individual molecules in solution without any perturbations due to surface attachment.

Until now, theoretical ecological studies on the response of ecosystems to various perturbations have focused on the resilience of such ecosystems.

Dr. Veenstra joined NCI - Frederick in the fall of 2001 to implement a state - of - the - art mass spectrometry center that focuses on the discovery of signaling pathways and networks that are activated within cells as a response to external perturbations.

Scale ‐ free networks also minimize the consequences of most biochemical or genetic errors (Wagner and Fell, 2001), and accommodate perturbations to the network with minimal effects on critical functions (Pastor ‐ Satorras and Vespignani, 2002), unless hubs are the targets of the perturbations (Albert, 2005)(vide infra).

Most analytical approaches to this problem are rather rudimentary and involve calculating simple correlations among the genes whose expression changes in response to a perturbation, clustering the genes by molecular or known functional class, and drawing crude inferences about mechanism on that basis.

On January 15, 2010, a team of astronomers released the results of computer simulations indicating that kilometer - size planetesimals can form and accrete into rocky Earth - size planets around Alpha Centauri B despite gravitational perturbations from Alpha Centauri A.

CFSs are loci that recurrently exhibit breaks on mitotic chromosomes following perturbation of DNA replication, and are now increasingly regarded as a driving force of oncogenesis.

To test their hypothesis, they performed lipidomics analyses on the same DASP samples to identify perturbations in the lipids of individuals with recently diagnosed T1DM and to potentially identify a lipid profile that could predict or diagnose the disease.

To avoid such perturbations, researchers have developed a computer program that can distinguish between cell types and identify subcellular structures, among other features — all without the fluorescent probes our human eyes rely on.

One possible explanation for this perturbation in the Hubble flow is the existence of the so - called Great Attractor — a region or structure of huge mass (equivalent to tens of thousands of galaxies) exerting a gravitational pull on the surrounding galaxies.

My aim is to collect quantitative data about cellular processes in real time through observation and perturbation of molecular dynamics on the nanoscale in living cells.

The exact timing and nature of these effects will vary, depending on such things as crop variety selection, farm microclimates, and market perturbations.

«This really argues that perturbations in this pathway that increase lifespan wouldn't necessarily make you sick in any way or have a detrimental effect on your health,» Kenyon said.

Studies of the influence of natural and anthropogenic alterations or perturbations to habitat on habitat use by fish and value as measured by residence time, abundance, and range requirements.

His research focuses on normal molecular mechanisms of brain development and genetic perturbations that underlie disorders of human cognitive development, such as in severe autism spectrum disorders.

Notably, the portion of the focal region behind the robotic fish identifies the microhabitat in which the flow perturbations induced by the robot beating tail are expected to generate relevant effects on golden shiners» swimming, as demonstrated in [20].

Results of regular monitoring of the species diversity and structure of plant communities is used by conservation biologists to help understand impacts of perturbations caused by humans and other environmental factors on ecosystems worldwide.

First detected as a periodic orbital perturbation in 1905 by N. E. Norlund, this companion has been cited by the Sixth Catalog of Orbits of Visual Binary Stars as being separated «on average» from Star Aa by a semi-major axis of 0.054», which may be a misinterpretation of Heintz (1996).

To carry out the study, which is published as two articles in the journal «Monthly Notices of the Royal Astronomical Society Letters», the researchers have analysed the effects of the so - called «Kozai mechanism», related to the gravitational perturbation that a large body exerts on the orbit of another much smaller and further away object.