The transition boundary between the troposphere and the layer above is called the tropopause. Together the tropopause and the troposphere are known as the lower atmosphere. Stratosphere. The Stratosphere extends from the tropopause up to 31 miles above the Earth's surface.This layer holds 19 percent of the atmosphere's gases but very little water vapor.Temperature increases with height as radiation is increasingly absorbed by oxygen molecules leading to the formation of Ozone.tratosphere. The Stratosphere extends from the tropopause up to 31 miles above the Earth's surface. This layer holds 19 percent of the atmosphere's gases but very little water vapor. Temperature increases with height as radiation is increasingly absorbed by oxygen molecules leading to the formation of Ozone.
Bilbao is situated in the north-central part of Spain, some 14 kilometres (8.7 mi) south of the Bay of Biscay, where the estuary of Bilbao is formed.Its main urban core is surrounded by two small mountain ranges with an average elevation of 400 metres (1,300 ft).uring those years Banco de Bilbao (Bank of Bilbao), founded in Bilbao in 1857 and Banco de Vizcaya (Bank of Biscay), which was established in 1901, also in Bilbao, made their appearance. Both entities merged in 1988 creating the BBV corporation (Banco Bilbao Vizcaya, Bank of Bilbao-Biscay).
It is the fifth most populated metropolitan area in Spain Almost 80% of the population of Biscay and 43% of the population of the Basque Country is concentrated in the Greater Bilbao area or the wider metropolitan area.