ENVS 3050 Study Guide - Final Guide: Homeothermy, Apparent Temperature, One Direction

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Step 1: divide sphere" surrounding animal into parts (upper and lower) receiving different amounts of radiation: consider radiation coming from: All directions (d = diffuse sw & lw) Coming from only one direction (s = direct sw) Step 2: approximate body shape with 3d shape (cylinder, sphere) Step 3: decide on object"s area involved with each flux: interception of direct radiation (solar beam) depends on area of projected shadow, interception and emission of non-direction radiation depends on surface area of object. Step 4: write out equation for absorbed radiation. Absorbed radiation for an object standing on a simple surface. Fraction of radiation leaving one object that"s intercepted by another object. Note: need to consider direction radiation is coming from: all directions (sw diffuse and reflected, and lw, one direction (sw direct) View factor for direct sw changes with angle of sun: interception of direct sw is minimized at high solar altitude angles. Graphs of environment temperature vs body temperature/metabolic rate.