Lakagígar - Craters of Laki FULL VERSION
I had to dig down into the bottomless pit of the interwebz to find the full video.
YT had blocked part 1 (the first 8 minutes) (BBC-©-BS)
On 8 June 1783, a 25 km (15.5 mi) long fissure with 130 craters opened with phreatomagmatic (A phreatic eruption, also called a phreatic explosion, ultravulcanian eruption or steam-blast eruption) explosions because of the groundwater interacting with the rising basalt magma.
This event is rated as 4 on the Volcanic Explosivity Index,
but the eight-month emission of sulfuric aerosols resulted in one of the most important climatic and socially repercussive events of the last millennium.
The eruption, also known as the Skaftáreldar (Skaftá fires) or Síðueldur was a VEI 6,
produced an estimated 14 km3 (3.4 cu mi) of basalt lava,
and the total volume of tephra emitted was 0.91 km3 (0.2 cu mi).
Lava fountains were estimated to have reached heights of 800 to 1,400 m (2,600 to 4,600 ft). The gases were carried by the convective eruption column to altitudes of about 15 km (10 mi).
The eruption continued until 7 February 1784,
but most of the lava was ejected in the first five months.
Grímsvötn volcano, from which the Laki fissure extends, was also erupting at the time, from 1783 until 1785.
The outpouring of gases, including an estimated 8 million tons of hydrogen fluoride and an estimated 120 million tons of sulfur dioxide, gave rise to what has since become known as the Laki haze across Europe. [Haze of Torment]
There is evidence that the Laki eruption weakened African and Indian monsoon circulations, leading to between 1 and 3 millimetres (0.04 and 0.12 in) less daily precipitation than normal over the Sahel of Africa, resulting in, among other effects, low flow in the River Nile.
The resulting famine that afflicted Egypt in 1784 cost it roughly one-sixth of its population.
The eruption was also found to have affected the southern Arabian Peninsula and India.
An estimated 120,000,000 long tons (120,000,000 t) of sulphur dioxide was emitted,
This outpouring of sulphur dioxide during unusual weather conditions caused a thick haze to spread across western Europe, resulting in many thousands of deaths throughout the remainder of 1783 and the winter of 1784.
The summer of 1783 was the hottest on record [GLOBAL WAAARMINHG]
and a rare high-pressure zone over Iceland caused the winds to blow to the south-east.
Inhaling sulphur dioxide gas causes victims to choke as their internal soft tissue swells – the gas reacts with the moisture in lungs and produces sulfurous acid.
It has been estimated that 23,000 British people died from the poisoning.
The weather became very hot, causing severe thunderstorms with large hailstones that were reported to have killed cattle,
until the haze dissipated in the autumn.
The winter of 1783–1784 was very severe;
the naturalist Gilbert White in Selborne, Hampshire, reported 28 days of continuous frost.
The extreme winter is estimated to have caused 8,000 additional deaths in the UK. During the spring thaw, Germany and Central Europe reported severe flood damage.
The meteorological impact of Laki continued, contributing significantly to several years of extreme weather in Europe.
These events contributed significantly to an increase in poverty and famine that may have contributed to the French Revolution in 1789.
Laki was only one factor in a decade of climatic disruption, as Grímsvötn was erupting from 1783 to 1785, and there may have been an unusually strong El Niño effect from 1789 to 1793.
In North America, the winter of 1784 was the longest and one of the coldest on record.
It was the longest period of below-zero temperatures in New England, with the largest accumulation of snow in New Jersey, and the longest freezing over of Chesapeake Bay.
A huge snowstorm hit the South; the Mississippi River froze at New Orleans and there were reports of ice floes in the Gulf of Mexico.