Irish stepdance traditional step dance in Munster. This style is largely performed on the balls of the feet with toes pointed outwards. Competitive dancers are judged on posture, timing, rhythm and execution, which in practice means a rigid torso, rapid and intricate footwork, and legs and feet crossed over each other, with knees close together. Irish stepdances can be placed into two categories. Solo stepdances, which are danced by a single dancer, and group stepdances, which are coordinated with 2 or more dancers. "Reel", "slip jig", "hornpipe", and "jig" are all types of Irish stepdances and are also types of Irish traditional
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