Sentences with phrase «hemisphere ozone hole»

In the southern hemisphere the Ozone Hole boundary is being held open by the eccentric South Magnetic Pole, and Antarctic sea ice expands to match that latitude.

Have you seen the NASA Earth Observatory posting on the predicted effects of the closing of the southern hemisphere ozone hole?

Not exact matches

The annual Antarctic ozone hole has caused significant changes in Southern Hemisphere surface climate in the summer.

The Antarctic ozone hole forms and expands during the Southern Hemisphere spring (August and September) because of the high levels of chemically active forms of chlorine and bromine in the stratosphere.

The large size of this year's ozone hole will likely result in increases of harmful ultraviolet rays at Earth's surface, particularly in Antarctica and the Southern Hemisphere in the coming months.

They claim to have discovered an important process underlying the growing ozone hole over the southern hemisphere.

She collected pollen and irradiated it in a lab for 3 minutes with UV light, simulating the amount of UV that can reach the Earth's surface in Patagonia and other regions in the southern hemisphere under the seasonal ozone hole.

The Antarctic ozone hole forms every Southern Hemisphere spring, when chemical reactions involving chlorine and bromine break apart the oxygen atoms that make up ozone molecules.

This paper explains why the Northern Hemisphere is melting and the Southern Hemisphere retains its glacier in the Ozone Hole.

The SAM in the Southern Hemisphere is similar in that regard and the SAM has been affected by the ozone hole and perhaps CO2 to make for a more positive sign.

On the one hand, models do pretty well at capturing the poleward expansion in the Southern hemisphere but only if they include the effects of the Antarctic ozone hole!

In a year that saw the first genuine «ozone hole» appear in the Northern Hemisphere, atmospheric scientists say they are shocked to learn that Environment Canada, the country» s environment agency, has decided to drastically reduce its ozone science and monitoring programme.»

Observations made in the late winter and early spring of 2011 reveal ozone loss far outside the range previously observed over the Northern Hemisphere, comparable to some Antarctic ozone holes.

Figure 2: Total column ozone loss relative to pre-ozone hole conditions in the 1970s in percent (left) and total number of molecules (right)(1 DU = 2.69 molecules / cm2) averaged over 2010 - 2019, during September for the Southern Hemisphere and March for the Northern Hemisphere.

Also from the late 1970s through the 1990s, in the Southern Hemisphere the Antarctic ozone hole developed and deepened.

The ozone hole that forms in the northern hemisphere, due also to ingress of troposphere NOx rich air into zones where it is normally not found, is brief due to the geography of the distribution of land and sea.

Observations and model simulations show that the Antarctic ozone hole caused much of the observed southward shift of the Southern Hemisphere middle latitude jet in the troposphere during summer since 1980.

The southward shift in the tropospheric jet extends to the surface of the Earth and is linked dynamically to the ozone hole induced strengthening of the Southern Hemisphere stratospheric polar vortex.

A bigger hole in the ozone layer over Northern Hemisphere countries could mean more UV damage to humans, animals and plants.

The ozone hole indirect effect: cloud - radiative anomalies accompanying the poleward shift of the eddy - driven jet in the Southern Hemisphere.

Opposite signed trends in the Southern Hemisphere middle latitude jetstream are expected in response to the recovery of the Antarctic ozone hole (Son et al., 2010; Arblaster et al., 2011; Polvani et al., 2011).

In the early 1980s, scientists discovered a hole in the ozone layer that forms over Antarctica during the Southern Hemisphere's spring months, from September to November.

The main reasons, for my doubts, being that CFCs are heavier than air and are not likely to streak off to the Stratosphere and that they are mainly produced in the Northern Hemisphere by us humans and taking the Hadley, Ferrell and Polar Cells into account the North Pole is by far a more likely candidate for a hole in the Ozone.

A publication by the conservative think tank, The Cato Institute, argued that NASA's 1992 warnings of a potential ozone hole opening up over the Northern Hemisphere «were exquisitely timed to bolster the agency's budget requests» (Bailey, 1993).

A new study led by Columbia University researchers has found that the closing of the ozone hole, which is projected to occur sometime in the second half of the 21st century, may significantly affect climate change in the Southern Hemisphere, and therefore, the global climate.

In an idealized three - dimensional numerical simulation of the Northern Hemisphere winter stratosphere, doubling the CO2 concentration leads to the formation of an Arctic ozone hole comparable to that observed over Antarctica, with nearly 100 % local depletion of lower - stratospheric ozone.