GEOLOGY 1 Lecture 18: Geol_1_-_lecture_18
Document Summary
Nature can jump up and hit humans in the face. Humans can jump up and hit nature in the face. Weather: short-term (days to weeks), atmospheric conditions (temperature, rainfall, etc) Climate: long-term (years, decades, centuries), atmospheric conditions (tropical vs. temperate vs. arctic climates) The rock-record tells us that there has been climate change in the past. E. g. look at kingston, on o covered in ice sheets 20,000 years ago: covered in shallow tropical seas 500,000,000 years ago fossils in 450 million year old fossils. Esker: a long ridge of gravel and other sediment, typically winding, deposited by meltwater from a retreating glacier or ice sheet. We can look at the rock record to help determine climate change. Natural causes o e. g. plate tectonics, increased solar luminosity (sun getting brighter) Anthropogenic causes (human-induced) o e. g. burning coal, oil, gas o. Perhaps adding carbon dioxide to the atmosphere and heating it. Greenhouse gases heat our atmosphere (water, carbondioxide, methane, nitrons oxides, ozone)
