ERS103H5 Lecture Notes - Lecture 16: Dendrochronology, Carboniferous, Transpiration
Document Summary
Martin morales tuesday, november 12- thursday november 14. Weather (definition): conditions in the atmosphere at any time. Local weather systems develop and dissipate rapidly over the course of hours to a day. Climate (definition): climate is defined as the average weather, or as the statistical description in terms of the mean and variability of relevant quantities over a period of time (months - ma) Relevant quantities such as temperature, precipitation and wind. Presently cover 10% as opposed to 30% of earth during ice ages. How glaciers form - 3 conditions: cold climate (polar latitudes/high altitude, snow much accumulate (more fall than melting, snow must not be removed by avalanches/wind. Geological evidence for glacial events: glacial till, dropstones ect, striations - parallel scratches on rock surfaces. Correlation between mean annual temperature of smooth leaves with no teeth. Spruce forest location today vs 12,000 years ago. Growth rings in trees and their thickness reflects.
