Sentences with phrase «by volcanic eruptions suggest»

Not exact matches

Th experiment suggests that enhanced UV - B at the end of the Permian, caused by ozone depletion from volcanic eruptions, could have contributed to Earth's largest mass extinction.

Now, research suggests that for the past decade, such stratospheric aerosols — injected into the atmosphere by either recent volcanic eruptions or human activities such as coal burning — are slowing down global warming.

Some researchers have suggested that these gases might have been spewed out by the volcanic eruptions that produced the Siberian traps, a vast formation of volcanic rock produced by the most extensive eruptions in Earth's geological record.

This suggested that an ice age could be initiated within a few years by eg a volcanic eruption causing cooling that caused widespread snow cover, causing further cooling by reflecting sunlight etc..

The various kinds of evidence examined by the panel suggest that the troposphere actually may have warmed much less rapidly than the surface from 1979 into the late 1990s, due both to natural causes (e.g., the sequence of volcanic eruptions that occurred within this particular 20 - year period) and human activities (e.g., the cooling of the upper part of the troposphere resulting from ozone depletion in the stratosphere).

Other researchers have already suggested that high atmospheric carbon dioxide levels, driven by enormous, slow volcanic eruptions, could have turned the oceans increasingly acidic.