The rumbling Alaskan volcano Redoubt has exploded producing a stratosphere-reaching plume in excess of 60,000 ft (17 km). An eruption is termed ‘ultraplinian’ if its ejecta reaches the stratosphere, about 10km in height. Dust and gases in the stratosphere are known to depress the global temperature for up to a few years after the eruption. The extent of cooling depends on the amount and type of material, the size and duration of ultraplinian eruption, and the latitude (high latitude eruptions like Redoubt are less effective than lower ones).

The plume could be seen easily on infrared here (top center of first radar).

### Like this:

Like Loading...

Impressive, but not really comparable to eruptions with notable climate impacts. Pinatubo, for example, blew 34km (111,000 feet).

You may already know this, but it’s worth mentioning anyway that there’s a rule of thumb used to relate the rate of discharge of a volcano (in cubic meters per second) to the height of the plume [in kilometers]. [Height] = 1.67*[Rate of Discharge]^0.259. I don’t know where that comes from, but it appears to be an empirically-derived formula.

Given the difference in heights, you get about 1/8th the rate of discharge for Redoubt, and with the shorter eruption (0.5 hours versus 1.25 hours – roughly in both cases), you end up with about 1/20 the total discharge.

Of course, if you’re hoping for a noticeable impact, this eruption may not be the biggest.

Impressive, but not really comparable to eruptions with notable climate impacts. Pinatubo, for example, blew 34km (111,000 feet).

You may already know this, but it’s worth mentioning anyway that there’s a rule of thumb used to relate the rate of discharge of a volcano (in cubic meters per second) to the height of the plume [in kilometers]. [Height] = 1.67*[Rate of Discharge]^0.259. I don’t know where that comes from, but it appears to be an empirically-derived formula.

Given the difference in heights, you get about 1/8th the rate of discharge for Redoubt, and with the shorter eruption (0.5 hours versus 1.25 hours – roughly in both cases), you end up with about 1/20 the total discharge.

Of course, if you’re hoping for a noticeable impact, this eruption may not be the biggest.

Here’s a cool picture of the plume:

http://www.avo.alaska.edu/image.php?id=17104

Here’s a cool picture of the plume:

http://www.avo.alaska.edu/image.php?id=17104

Morgan. That is a fantastic picture. Thanks also for the rule of thumb. I saw the plume quite clearly on the infrared this morning, a large sausage shape, but it dissipated very quickly.

Morgan. That is a fantastic picture. Thanks also for the rule of thumb. I saw the plume quite clearly on the infrared this morning, a large sausage shape, but it dissipated very quickly.

Pingback: wypozyczalnia lawet

Pingback: click here

Pingback: kliknij tutaj

Pingback: pokazy kulinarne

Pingback: poradnia dietetyczna

Pingback: massage sensuel paris 17

Pingback: Dating coach for men

Pingback: link do strony

Pingback: strona firmy

Pingback: my response

Pingback: click site

Pingback: testosterone side effects

Pingback: link do strony

Pingback: polecam

Pingback: jak dbac o cialo

Pingback: makkelijk afvallen zonder dieet

Pingback: goeie voornemens

Pingback: click here

Pingback: click here

Pingback: Google sniper 3.0

Pingback: Watch the review

Pingback: Netflix New Releases

Pingback: zobacz tutaj

Pingback: see more

Pingback: click to read

Pingback: check out this dating coach