GGR214H5 Study Guide - Midterm Guide: Cumulus Congestus Cloud, Fog, Cirrus Cloud
Document Summary
Questions are developed on material spanning lectures 11-22 (i. e. after the mid-term) but note that earlier concepts, etc may be relevant. Part 1: questions 1-3 are compulsory questions (totalling 60 marks) Part 2: question 4 is a short essay question (from a choice of 6) (totalling 40 marks) Weather forecasting (note will not involve weather map interpretation) Homogeneous (one) nucleation: results in droplets made up of water only. Small droplets <0. 01 m: molecules are weak because of greater saturation vapour pressure on a curved surface. These small droplets require a rh of >112% Curvature effect: as a water droplet gets smaller, its curvature increases which makes it easier to evaporate. The required relative humidity for its equilibrium in its surrounding will increase. Ex: consider a droplet with a 0. 05 m, it requires a relative humidity of 102 % or saturation of 2% to neither evaporate or grow.
