Bush dance traditional UK and Irish tunes. UK, Irish and USA session players would know variations of most of the tunes. Rhythms include – Reel, Jig, March, Waltz and Hornpipe. Instruments – Fiddle, Piano, Accordion both Piano and Melodeon, Concertina; both English and Anglo, Tin whistle, Bush bass, Guitar, Banjo and all types of Percussion, including lagerphone. Electric amplified instruments, such as electric bass guitar or electric guitar have been used since the 1970s. Bush dances are similar to American line dances or American square dances, in that all dancers know certain steps and execute them together. Partners are often changed in
Solar activity and climate the measurements started in 1978. Solar irradiance before the 1970s is estimated using proxy variables, such as tree rings, the number of sunspots, and the abundances of cosmogenic isotopes such as Be, all of which are calibrated to the post-1978 direct measurements. Solar activity has been on a declining trend since the 1960s, as indicated by solar cycles 19-24, in which the maximum number of sunspots were 201, 111, 165, 159, 121 and 82, respectively. In the three decades following 1978, the combination of solar and volcanic activity is estimated to have had a slight cooling influence. A 2010 study