GEOL 1304 Lecture Notes - Lecture 1: Res Publica, Atmospheric Chemistry, Younger Dryas
Document Summary
Top 14 warmest years in record have been in the last xv years. Average global temperatures have increased by 0. 9 c since 1880. Slight ice age around 1900-1970 to present- drastic increase in temperature-highest temperature in. N %-10% more in 30 n-85 n latitudes since 1900. Combination!-volcanic eruptions (short condition = cooling, long term =warming)-elevation nino (natural oceanic changes) Two human mechanism that affect global temperature : land use/land covert change (disforestation , lots of concrete affect albedo)2. Changing atmospheric chemistry (greenhouse gasses, fogy fuel)^^^considered primary factor of human in uence . Bc 1900 = sharp increase in temperature , also when fossil fuels began to be used. Sea level has climb 18. phoebe cm since 1900-could be due to melting permanent ice on some res publica surfaces and in oceans. 5,000 years ago. -temperatures increased a plenty since the younger dryas. In the arctic during winter stallion sea will frost over. -sea ice melts by sept. -2001-2012: less sea ice cover in sept.
