(2007) concluded, with very high confidence, that regional temperature trends had already affected species and ecosystems around the world (p. 792). With high confidence, they concluded that climate change would result in the extinction of many species and a reduction in the diversity of ecosystems (p.
Full Answer. Use of the Gregorian calendar keeps the arrival of spring on March 20 or March 21 for most years, though sometimes spring arrives on March 19. According to National Geographic, in addition to the astronomical start of spring, a biological spring begins each year, usually on a different date.
The calendar shows Spring beginning on the Equinox of either March  20 or September 22/23 in the Southern Hemisphere.    The traditional winter months are December-Jan â¦ uary-February and the  spring months as March-April-May, for the Northern Hemisphere. Creative Cocktails for the Spring Season Spring is a beautiful time of the year. 2  Flowers are blooming, birds are singing and everything just comes alive again after the winter months.