Sentences with phrase «radiation changes rather»

Not exact matches

This changes a lot of what scientists thought they knew about how water bears deal with radiation, as they were previously thought to have proteins that repaired damaged DNA, rather than proteins that halt damage altogether.

Officials said the decision to change the plant's nuclear safety level was due to cumulative radiation releases since the earthquake wreaked serious damage to the reactors, rather than a sudden deterioration in conditions.

But because the vinclozolin - induced fertility changes occurred in almost every male rat descended from a treated mother rather than in a small percentage of offspring (as is seen in germ line mutations caused by radiation), Skinner suspects an epigenetic mechanism — a change that doesn't mutate the DNA sequence of an animal, but rather affects how genes are expressed.

At the time this was probably rather useless genomic variation, but has now become incredibly beneficial millions of years later when the opportunity for major adaptive radiations arose, changing the way we think about evolutionary processes.»

The solar - cloud connection is quite real (after two satellite measured sun cycles), but can't explain the rather fast and huge changes in radiation balance over the previous period.

That is, the oceans do not directly affect the radiation budget of the planet, but rather, affect the time constant by which the planet «experiences» changes in radiation.

If the objective was to develop a general circulation model that matches reality rather than to push an agenda likely one of model fixes would be modify to GCMs (modeling of planetary cloud cover) to match Lindzen and Choi finding that planetary cloud cover in the tropics increases or decreases to resist forcing changes by reflecting more or less radiation off to space.

There has to be some sort of inhomogeneity, such as free surface, cloud droplet, dust particle or abrupt change of refractive index, for the energy in the intercepted electromagnetic radiation to reappear in the form of translational motion (i.e. heat) rather than being confined to vibrational and rotation modes.

Analysis of top of the atmosphere radiation changes Vs changes in planetary temperature also support the assertion that planetary clouds increase in the tropics thereby reflecting more sunlight off into space thereby resisting forcing changes rather than amplifying them.

It's rather the top - of - atmosphere (or tropopause) forcing change — and the consequent reduced ability the system as a whole to shed radiation to space — that's responsible.

Warming is greater in the northern hemisphere, over land, and at night, greater in the troposphere and cooler in the stratosphere, all indications of greenhouse warming rather than warming from solar radiation changes or other «natural» causes.

Warming trend At this time of changing climate, the Northern Hemisphere of the Earth was subject to increased solar radiation because its perihelion (defined) was in July rather than in January as it is now.

For example, the global average effect of any change in albedo from using solar power would be rather small in comparison to mitigation of climate change if that solar power is used (to displace fossil fuels) for a sufficient time period (example: if a 10 % efficient PV panel with zero albedo (reflectivity for solar (SW) radiation) covered ground with an albedo of 25 — 30 %, the ratio of total increased heating to electricity generation would be similar to that of many fuel - combusting or fission - powered power plants (setting aside inverter and grid efficiency, etc., but still it would be similar).

This new paradigm states that rather than the TOA (top of the atmosphere) energy balance being maintained by changes to the outgoing long wave radiation (which is saturated), it is mainly maintained by changes to the outgoing short wave radiation, i.e. albedo.

The comparison of solar activity change over the past century (0.19 %) and United States temperature change (in K)(0.21 %) assumes that readers are sufficiently ignorant of basic blackbody radiation theory to think that the similarity of the numbers supports their thesis, rather than being convincing evidence against their thesis.