Monday, April 06, 2015

Springtime in an Era of More Extreme Weather

[This is an interesting report on extreme weather and how it is related to volcanic activity and changes in the thermohaline currents. Some of this matches many of the I AM America Earth Changes prophecies, and the climate change areas indicated on the original I AM America Map - Lori.]

from Fabius Maximus by Evelyn Browning Garniss -
  1. The volcanic debris from two 2011 polar eruptions are causing the extreme Arctic cold and East Coast precipitation. This should be the last year of these eruptions affecting weather.
  2. With the current long-term cooler trend of the long-term Pacific Decadal Oscillation, the warm tropical El Niño has been weakened. … It currently is in Modoki (dry) configuration, but is warming to more standard El Niño conditions (wet) for March.
  3. The current long-term ocean patterns, a warm Atlantic Multi-decadal Oscillation and cool PDO phase, historically produce decades of more extreme weather for North and South America. Expect 15 to 20 years of more extreme climate.
  4. Despite above-average February rainfall, the drought conditions in South America, particularly Brazil continue. Coffee, sugar cane and soybean production is reduced and Brazil’s major cities of Sao Paulo and Rio de Janeiro are facing potential water rationing.
The temperatures, particularly eastern temperatures, have made headlines. North America has been so bipolar that in late February Anchorage, Alaska (25°F/3.9C) was 10°F warmer than Atlanta, Georgia (15°F/-9.4°C). El Niño conditions then produced Southern rain that raced up the East Coast, creating ice storms and wind chilled enhancement of the freezing cold. … The good news is that this weather was predictable. … This winter followed the historical pattern for years with volcanically cooled polar air, a weak El Niño and hot Atlantic waters off the East Coast.

Short term effects making the Weather More Extreme: Volcanoes

As regular readers are familiar with, our current weather has been partially shaped by recent volcanic activity – specifically the large eruptions of two polar volcanoes. In 2011, Mt. Grímsvötn in Iceland and Sheveluch volcano on Russia’s Kamchatka Peninsula. While these eruptions were not tremendously powerful, they were both large enough to enter the stratosphere. There the volcanic ash and chemical aerosols lingered for 3 years, increasingly cooling the polar air mass.

Recent volcanic activity has not been as powerful, but we are seeing constant activity in both Russia and Iceland. In Russia, several volcanoes are currently active. Sheveluch, Klyuchevskoy and Chikurachki have had a series of 5 – 7 km eruptions in February. While this is not high enough to change the climate for years, it is entering passing fronts. … Meanwhile, in Iceland, Bardarbunga volcano continues to leak lava and gas at low levels.
… The last time we saw this pattern of eruptions in both the Polar Regions of the North Atlantic and Pacific was back in the 1780s, so we are seeing patterns that haven’t existed in centuries. The dust and chemicals blocked out incoming sunlight, decreasing the Arctic’s summertime warming. Indeed, the end of the summer found 1.5 million sq. km (more than 579,000 sq. miles) more sea ice than two years previously.
Winter has allowed this cold to shift south, creating extreme, even record-breaking cold from Michigan to Miami. Only the fact that the North Atlantic Oscillation is currently positive, shifting weather patterns eastward quickly, has kept this year from being a repeat of last year’s awful polar vortex weather.
{T}he debris from Russian volcanoes in Kamchatka is also cooling the air in the North Pacific. This cooling strengthens a semi-permanent air pressure storm region called the Aleutian Low. The Aleutian Low is a key area for steering the polar jet stream and when it is strong, it veers the jetstream north along the West Coast. Unfortunately, this keeps polar storms from hitting the Western US. This, in turn, reduces rain and snowfall and creates warmer temperatures that evaporate the already low levels of moisture. When coupled with other air pressure patterns this makes a pattern known as a positive Pacific North American (pna) pattern that encourages cold air to plunge east of the Rockies. Read More