The ability of rural dwellers to migrate to cities increased suddenly with Mongolia's transition, in 1990, from a Soviet-imposed communist system to democracy.
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Thalassinoides is an ichnogenus of trace fossil used to refer to "dichotomously or T-branched boxworks, mazes and shafts, unlined and unornamented". Facies of Thalassinoides increased suddenly in abundance at the beginning of the Mesozoic. Such burrows are made by a number of organisms, including the sea anemone Cerianthus, Balanoglossus and fishes, but are most closely associated with decapod crustaceans of the (former) infraorder Thalassinidea.
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The APVC area before the upper Miocene was largely formed from sedimentary layers of Ordovician to Miocene age and deformed during previous stages of Andean orogeny, with low volume volcanics. Activity until the late Miocene was effusive with andesite as the major product. After a volcanic pause related to flat slab subduction, starting from 27 mya volcanism increased suddenly. Ignimbrites range in age from 25 mya to 1 mya.
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Some of the differences reflect different types of oil included. Different estimates may or may not include oil shale, mined oil sands or natural gas liquids. Because proven reserves include oil recoverable under current economic conditions, nations may see large increases in proven reserves when known, but previously uneconomic deposits become economic to develop. In this way, Canada's proven reserves increased suddenly in 2003 when the oil sands of Alberta were seen to be economically viable.
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The rotor is then disconnected from the engine and the angle of attack of the main rotor blades is increased suddenly so that the vehicle leaps into the air. The aircraft's main rotor has enough momentum due to heavy counterweights in the tips that it can hover for a short time safely. The pilot then applies full power to the rear pusher propeller and the vehicle starts to move forwards. As it does so, air is forced through the main rotor, spinning it faster and generating more lift.
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The European Beech was severely affected by the drought and took around twenty years to recover. To date, its growth has failed to recover completely, reaching only about 75% of their pre-drought growth rates, even decades after the drought. Additionally, death due to drought resulted in the loss of around 15% of the mature beech trees in the forest. In contrast, the sessile oak did not suffer any death or growth suppression due to drought, but instead benefited from reduced competition with beech. Sessile oak growth increased suddenly after the drought and remained unusually high until the 1990s, when beech recovered and regained dominance.
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The aircraft was equipped with a flight data recorder and a cockpit voice recorder. The flight data recorder functioned throughout the flight and continuously recorded the aircraft's pressure altitude, indicated airspeed, vertical acceleration and magnetic heading until the moment of impact with the ground. The cockpit voice recorder was slightly damaged in the impact and subsequent fire but there was no damage to the record of radio transmissions from the aircraft during the final 30 minutes of the flight. The record of ambient noise in the cockpit was also preserved and revealed the precise moment at which the frequency and volume of noise increased suddenly.
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Long term atmospheric measurements of methane by NOAA show that the build up of methane leveled off during the decade prior to 2006, after nearly tripling since pre-industrial times. Although scientists have yet to determine what caused this reduction in the rate of accumulation of atmospheric methane, it appears it could be due to reduced industrial emissions and drought in wetland areas. Exceptions to this drop in growth rate occurred in 1991 and 1998 when growth rates increased suddenly to 14–15 nmol/mol per year for those years, nearly double the growth rates of the years before. The 1991 spike is understood to be due to the volcanic eruption of Mt. Pinatubo in June of that year.
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This policy had as its general aim the securing of a Cairo to Cape Town railway system, and settling the upper highlands of East Africa and the whole of Southern Africa south of the Zambezi with British colonies in a manner akin to that of North America and Australasia. However, prioritization of British power around the globe in the years before World War I, initially reduced the resources appropriated toward settlement. World War I and the Great Depression and the general decline of British and European birthrates further hobbled the expected settler numbers. Nonetheless, thousands of colonists arrived each year during the decades preceding World War II, mostly in South Africa, where the birthrates of British Africans increased suddenly.
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Immediately after the opening of hostilities, Dutch and Belgian radio traffic increased suddenly in this area. From plain text messages sent by the III Corps Netherlands close to 's-Hertogenbosch, which were supplemented by plain text radio reports from the Dutch II Corps consisting of the Dutch 2nd Infantry Division and Dutch 4th Infantry Division near Rhenen at the Grebbe line, Germany learned on 11 May that the Allies had decided to withdraw into Fortress Holland (Battle of the Netherlands). Germany also learned from intercepted traffic from Belgian, which was supplemented by plain-text messages from the Belgian 6th Infantry Division that was part of the Belgian II Corps near Beringen that the Belgians intended to offer strong resistance behind the Albert Canal. On 10 and 11 May, French radio traffic in the Poperinge-Ypres-Kortrijk area.
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