Sentences with phrase «climate effects of volcanic eruptions»

Climate effects of volcanic eruptions.

University of Alabama - Huntsville climate scientists John Christy and Richard McNider found that by removing the climate effects of volcanic eruptions early on in the satellite temperature record showed virtually no change in the rate of warming since the early 1990s.

Not exact matches

For the first time, this study allowed researchers to analyse the effects of the climate change on the forest nutrient cycles, and states that Pyrenean forests can register these episodes chemical mark at a global scale (for instance, volcanic eruptions in remote areas) and the effects of gas emissions into the atmosphere since the Industrial Revolution.

But despite that steady climb, not every year is warmer than the one before it, thanks to the vagaries of weather, the influence of natural climate cycles, and the effects of events like volcanic eruptions.

Volcanic eruptions and impacts from celestial bodies, like asteroids, have a near instantaneous effect, but very few of these one - time events are of sufficient size to impact the global climate for more than a few years.

A couple links to articles on the effect of major volcanic eruptions on global climate, particularly relevant given the possible / probably / imminent eruption of Mt. Agung:

Do you know about, or can you refer me to someone who may know about, the climate effects of the other Tambora - scale volcanic eruption (VEI = 7) of the last millenium — from Changbaishan (Baitoushan) on the China - NKorea border (42oN latitude) sometime between 960-1025 AD?

In fact, climate models are tested against historic trends, both near history and distant history, and then tested against specific events, such as the effects of volcanic eruption.

In the abstract of Trenberth et al (2002), they write, «The 1976/1977 climate shift and the effects of two major volcanic eruptions in the past 2 decades are reflected in different evolution of ENSO events.

Volcanic activity was high during this period of history, and we know from modern studies of volcanism that eruptions can have strong cooling effects on the climate for several years after an eruption.

It could be a relatively cheap, effective and quick way to cool the planet by mimicking the natural effects on climate of large volcanic eruptions, but scientists concede there could be dramatic and dangerous side effects that they don't know about.

For example, the accumulated effect of volcanic eruptions during the past decade, including the Icelandic volcano with the impossible name, Eyjafjallajökull, may have had a greater cooling effect on the earth's surface than has been accounted for in most climate model simulations.

Natural variations in climate include the effects of cycles such as El Niño, La Niña and other ocean cycles; the 11 - year sunspot cycle and other changes in energy from the sun; and the effects of volcanic eruptions.

I always believed that the oceans were an important element in localised weather conditions over the short term but feel that relatively sudden shifts in climate occur through external forcings such as volcanic eruptions, meteor strike and the effects of changes in cosmic rays and sun spot activity, which are, unfortunately, all chaotic by nature and unpredictable.

«Studies of these [volcanic eruptions and El Niño] effects using climate models... Continue reading →

The most likely candidate for that climatic variable force that comes to mind is solar variability (because I can think of no other force that can change or reverse in a different trend often enough, and quick enough to account for the historical climatic record) and the primary and secondary effects associated with this solar variability which I feel are a significant player in glacial / inter-glacial cycles, counter climatic trends when taken into consideration with these factors which are, land / ocean arrangements, mean land elevation, mean magnetic field strength of the earth (magnetic excursions), the mean state of the climate (average global temperature), the initial state of the earth's climate (how close to interglacial - glacial threshold condition it is) the state of random terrestrial (violent volcanic eruption, or a random atmospheric circulation / oceanic pattern that feeds upon itself possibly) / extra terrestrial events (super-nova in vicinity of earth or a random impact) along with Milankovitch Cycles.

New UBC research shows that climate change may impede the cooling effect of volcanic eruptions.

You can see in Figure 3 that some of these chemistry - climate models do capture this overshoot behaviour following the effects of large volcanic eruptions.

Forster et al. (2007) described four mechanisms by which volcanic forcing influences climate: RF due to aerosol — radiation interaction; differential (vertical or horizontal) heating, producing gradients and changes in circulation; interactions with other modes of circulation, such as El Niño - Southern Oscillation (ENSO); and ozone depletion with its effects on stratospheric heating, which depends on anthropogenic chlorine (stratospheric ozone would increase with a volcanic eruption under low - chlorine conditions).

He and his collaborators employed both simple and complex computer models in early studies of the role of clouds in climate change, and in research on the climatic effects of massive volcanic eruptions.

Climate engineering: To counter the effects of heat - trapping greenhouse gases, some experts have proposed artificially cooling the planet by injecting sulfates into the stratosphere, which would mimic the effects of a major volcanic eruption.

Placing giant mirrors in orbit to reflect sunlight before it reaches Earth and launching millions of tons of sulfur into the stratosphere to simulate the effects of a major volcanic eruption are among the mind - boggling climate...