Saturday, 14 August 2010
Blocked Jet Stream- Responsible for Floods?
The jetstream is the high-altitude wind that circles the globe from west to east and normally pushes a series of wet but mild Atlantic lows across Britain.
But meteorologists who study the phenomenon say that it is producing unusual holding patterns which keep weather systems in one place and produce freak conditions.
A satellite map which shows the intense heat that has built up over Russia after the jetstream has been held up due to Rossby waves
The jetstream is being held by the Rossby waves that normally produce its distinctive wave-like pattern.
These powerful spinning wind currents are caused by the Earth’s shape and rotation and push the jet stream from east to west at high altitudes.
Now scientists believe that Rossby waves are acting against the jetstream’s usual pattern, holding it in place, according to a report in New
Since mid-July, when it would normally be moving eastwards the jetstream has been held in one place as strong Rossby waves push against it.
When the jet stream is held in one place it traps the weather systems that are caught between its meanders. Warm air is sucked north to the ‘peaks’ while cold air travels to the‘troughs’.
Professor Mike Blackburn of the University of Reading believes that a blocked jetstream could be behind a heatwave in Japan which killed 60 and the sudden end to warm weather in the UK.
Pakistani flood survivors evacuate a flooded area in Bssera village near Muzaffargarh today
In Pakistan, the blocking event took place at the same time as the summer monsoon, with tragic consequences.
Floods triggered by heavy monsoon rain over much of Pakistan began nearly two weeks ago and have killed around 1,600 people and forced more than two
million from their homes.
Many survivors from flooded villages have lost their stores of food as well as crops and livestock and are surviving on relief handouts.
In Russia, the immobile jetstream pulled in hot air from Africa creating stifling conditions and horrendous smog in Moscow.
Hundreds of wildfires have been burning across three time zones. Prime Minister Vladimir Putin yesterday boarded a fire-fighting plane to dump water on
blazes close to Moscow, where the smoke has caused thick smog
Scientists are still unclear as to the cause of ‘blocking events’ although there have been some research that linked them to low solar activity.
Area 51-Fact or Fiction?
Area 51 is a military base, and a remote detachment of Edwards Air Force Base. It is located in the southern portion of Nevada in the western United States, 83 miles (133 km) north-northwest of downtown Las Vegas. Situated at its center, on the southern shore of Groom Lake, is a large secretive military airfield. The base's primary purpose is to support development and testing of experimental aircraft and weapons systems.
The base lies within the United States Air Force's vast Nevada Test and Training Range. Although the facilities at the range are managed by the 99th Air Base Wing at Nellis Air Force Base, the Groom facility appears to be run as an adjunct of the Air Force Flight Test Center (AFFTC) at Edwards Air Force Base in the Mojave Desert, around 186 miles (300 km) southwest of Groom, and as such the base is known as Air Force Flight Test Center (Detachment 3).
Though the name Area 51 is used in official CIA documentation, other names used for the facility include Dreamland, Paradise Ranch, Home Base, Watertown Strip, Groom Lake, and most recently Homey Airport. The area is part of the Nellis Military Operations Area, and the restricted airspace around the field is referred to as (R-4808N), known by the military pilots in the area as "The Box" or "the Container".
The intense secrecy surrounding the base, the very existence of which the U.S. government barely acknowledges, has made it the frequent subject of conspiracy theories and a central component to unidentified flying object (UFO) folklore.