EOSC 112: THE FLUID EARTH - University of British Columbia
EOSC 112: THE FLUID EARTH ATMOSPHERIC STRUCTURE AND DYNAMICS Atm12 Read: Kump et al. Chap.3, p. 44-45; Chap.4, p. 55-61. Objectives: 1.To describe how atmospheric pressure and temperature vary with altitude; 2. To explain why air moves;
3. To describe what sets the global atmosphere in motion; 4. To describe the general pattern of Global Winds on a non-rotating planet. 1. Figures representing P change and T change with height Atmospheric pressure
Pressure = Force per unit area. Pressure decreases exponentially with height. 10 mbar (milliBar) = 1 kPa (kiloPascal) Atmospheric Temperature Troposphere: ground to about 12km (16km in Tropics, 10km in Arctic) Unlike the other layers, it is subjected to
constant vertical mixing (convection). It is this mixing process, through rising thermals and moist convection (followed by release of latent heat), that carries heat energy from the ground to cloud levels where it is radiated to space in the form of infrared radiation. Stratosphere (12km to 50km) is a stratified layer of dry air. It contains most of the ozone.
2. Vertical Movement Topographic uplifting Frontal wedging Convergence
Localized convection Mountain wave clouds & lee wave clouds Lenticular (lense-shaped) clouds (mountain wave clouds) Example: T inversion and Pollution
During night & early morning, clear sky => ground much cooler than air above => radiation (or surface) inversion Inversion has warm air above cool air => very stable. Pollutants cannot disperse upw. Tall chimney goes above inversion layer => effective
dispersion Daytime, ground warms => inversion disappears => pollutants disperse. Example: Inversion in valleys Night time: cool
air drains downhill, settling into valleys. Inversion at valley Pollutants trapped in valley.
3. The driving Force Global Energy Distribution 4. Global winds vertical and horizontal Horizontal movements:
Temp. changes => Pressure changes => Winds H Rad H L
WARM Surface air warms H Horizontal Motions: 7-step development 1. Radiation absorbed by Earths surface Surface warms
2. Air above ground warms by conduction Air expands, density drops 3. Air becomes unstable Convection sets in 4. Air rises Pressure aloft increases 5. Air aloft pushed laterally away from warm surface Surface pressure drops 6. Surface pressure around warm area increases Air converges toward warm area
7. Air subsides around warm surface Complete convection cell established Satellite view of the ITCZ Global winds on a non-rotating planet
Circuits which increase: voltage or current. Take small input signal to reproduce output waveform as larger amplitude. Ie. circuits which provide gain. Frequency selective (like a band-pass filter) Audio frequency. Video (Cable / Satellite) Radio
Build a new "intranet" for faculty. Creating new web presence with Web 2.0 technology will help facilitate information and professional development opportunities. A committee has been formed to begin the process of designing it.
AP Melodic Dictation. There are two melodic dictation questions on the AP test. One will be in treble clef and one will be in bass clef. One will be in simple meter and one will be in compound meter. One...
Purpose. The Purpose of this presentation is to provide awareness to the Fire Service Community as to how to safely operate around SOLAR PV Systems encountered on the fireground and to provide info on post fire investigation considerations.
Management of acute coronary syndromes (ACS) This presentation reflects the recommendations in the National Heart Foundation of Australia/Cardiac Society of Australia and New Zealand's Guidelines for the Management of Acute Coronary Syndromes (ACS) (2006), updated in the 2007 and 2011...
All students will be placed on the triple science course. Year 10. Currently three triple science groups and one double science group. At the end of year 10 students on the triple science course will be evaluated and those capable...
Leonardo's father was a customs officer in Béjaïa or Bugia/Bugiait's formal names. Where wax candles were sold from France. Leonardo grew up in Algeria and was taught his education by the Moors. ... He had a number sequence named after...
Ready to download the document? Go ahead and hit continue!