Sentences with phrase «activity volcanic dust»

16 Natural Climate Changes Volcanic Activity Volcanic dust can remain suspended in the atmosphere for several years, reflecting incoming solar radiation and lower global temperatures.

Not exact matches

Dust found in the ice gives a record of what was in the air thousands of years ago, whether from volcanic eruptions or human activity, and the isotopic composition of the hydrogen and oxygen molecules in the snow give a record of the temperature of the earth at the time.

The amount of dust in the atmosphere depends mainly on volcanic activity.

The Sun, Jupiter, gravitational moment of the remaining planets, Earth angular orbit variations of all kinds, galactic rays, motion of the solar system through the galaxy and dust clouds, the Moon, atmospheric water vapor, ocean currents, configuration of the tectonic plates and continental drift, volcanic activity, the natural biosphere, human urban development, human alteration of the greenhouse water cycle (dam's, rivers etc),,... human produced CO2.

If volcanic activity continues to increase, and there is an eruption big enough to send millions of tons of ash and dust into the upper layers of the atmosphere, then the Earth's temperature would likely drop at least a degree or two from present levels.

Although the Siberian Traps was basalt flooding, other volcanic activity occurring throughout the world as the continents were pushing together probably put a lot of dust in the atmosphere, off and on.

Most of these can be forcings at long time scales: GHG due to anthropogenics, sustained volcanic activity, or weathering; dust / aerosols due to sustained volcanic activity; and ice sheets due to orbital variations.

Solar activity increased to 2000 and volcanic forcing, presumably from volcanic dust levels, are essentially unknown.