Class #16 Monday, October 5 Class #16: Monday, October 5 Chapter 7 Global Winds 1.

Slides:



Advertisements
Similar presentations
Chapter 10 Wind: Global Systems.
Advertisements

Global Average Barometric Pressure: January
Wind Notes.
Weather.
Global and Local Winds Chapter 16 Section 3.
The General Circulation of the Atmosphere
Unit 9: Circulation Patterns of the Atmosphere
Air Masses and Winds. Air Masses Air Mass = large body of air that takes on characteristics of the area over which it formed Conditions: Over land = dry.
Air Earth’s Atmosphere.
Warm Up 3/21/08 The deflection of wind due to the Coriolis effect is strongest at ____. a. the poles c. midnight b. the equator d. the midlatitudes.
Visualizing Physical Geography Copyright © 2008 John Wiley and Sons Publishers Inc. Chapter 5 Winds and Global Circulation.
Visualizing Physical Geography Copyright © 2008 John Wiley and Sons Publishers Inc. Chapter 5 Winds and Global Circulation Visualizing Physical Geography.
Monday January 26, 2009 pg. 51 Happy Chinese New Year!  Describe what you know about air masses.
Ch 7 – Scales of Atmospheric Circulations
The General Circulation of the Atmosphere
Class #7: Thursday, July 15 Global wind systems Chapter 10 1Class #7, Thursday, July 15, 2010.
Outline Further Reading: Chapter 07 of the text book - Surface Winds on an Ideal Earth - Subtropical High-Pressure Belts - Wind and Pressure Features at.
The Atmosphere Wind Field –Drives upper layer flows of the major gyres Net Heat & Freshwater Exchanges –Drives buoyancy flows (like the conveyor belt)
Planetary Circulation. Today Homework in Global scale circulations Inter-tropical convergence zone Horses Monsoons.
1 Valley Breeze Example ©1997 Prentice-Hall, Inc..
What Factors Affect the Climate in Canada
General Atmospheric Circulation
The Jet Stream and Ocean Currents
UPPER-LEVEL WINDS Atmospheric pressure, temperature and winds at surface.
Class #13 Monday, September 27, 2010 Class #13: Monday, September 27 Chapter 7 Global Winds 1.
Making Connections Chapter 12
Weather Factors Global Patterns 5.3.
GEOG 1112: Weather and Climate
Winds. What we know about winds Winds move from high pressure areas to low pressure areas. The strength of wind is determined by the pressure gradient.
Earth’s Climate. Examine pages 456 and 457 in your text. From the data presented in the images and you knowledge of air movement, the atmosphere, and.
Global-scale Winds Courtesy: U. of Alaska General Circulation > Global wind systems General circulation 1-cell, 3-cell models, comparison to.
Section 3: Atmospheric Circulation Objectives ◦ Explain the Coriolis effect. ◦ Describe the global patterns of air circulation, and name three global wind.
Atmospheric Circulation: global circulation
Meteorology: the study of Earth’s atmosphere Meteor – In ancient Greek – meant “High in the air” Current meanings still apply Meteor – astronomical entity.
The Atmosphere in Motion Chapter 18
Chapter 2, Section 3. What is wind? The horizontal movement of air from an area of HIGH pressure to an area of LOW pressure.
Planetary Atmospheres, the Environment and Life (ExCos2Y) Topic 6: Wind Chris Parkes Rm 455 Kelvin Building.
What causes wind? The uneven heating of Earth’s surface by the sun causes temperature differences in air. Warm air rises, creating areas of low pressure.
Unit 10 Lesson 4 Wind in the Atmosphere Copyright © Houghton Mifflin Harcourt Publishing Company.
Winds Chapter 2, Section 3 p What causes wind? Wind: The horizontal movement of air from an area of high pressure to an area of lower pressure.
Welcome to Class Define radiation, convection, and conduction.
GEU 0027: Meteorology Lecture 10 Wind: Global Systems.
Atmosphere & Weather All About Winds.
Chapter 2 Weather Factors Section 3 Winds. What causes wind? Wind: The horizontal movement of air from an area of high pressure to an area of lower pressure.
Air Currents in the Atmosphere. Why is it warmer at the equator?
Atmospheric movements We learned that energy is transferred from the Sun to the Earth creating convection currents. But, what type of currents???
Class #15 Friday, October 1, 2010 Class #15: Friday, October 1 Chapter 7 Upper-level winds Chapter 8 Oceanography 1.
Global Wind Currents. What do wind patterns have to do with oceans?  CURRENTS.
Chapter 5 Lesson 3 Global Patterns Pgs. 164 – 169 Benchmark: SC.6.E.7.3.
MET 10 1 The General Circulation of the Atmosphere.
Global Wind Patterns. What is Wind? Wind is the movement of air from an area of higher pressure to an area of lower pressure. Warmer air expands, becoming.
The Atmosphere in Motion
Lecture 9 Conceptual model of the global circulation –Conservation of angular momentum Subtropical jetstream –ITCZ –Hadley circulation Upper-air midlatitude.
What causes the wind to blow?
Atmospheric wind systems. Hadley’s circulation model Heat supplied at low latitudes Temperatures steady at all latitudes → heat must be transported polewards.
Section 1.2 The Causes of Weather
Welcome to Class Define radiation, convection, and conduction.
Tropical to subtropical circulation. Major Zones ITCZ (Intertropical convergence zone) Subtropics (30 degrees, north/south hemisphere) Front Poles.
Class #17 Monday, February 16, Class #17: Monday, February 16 Surface pressure and winds Vertical motions Jet streams aloft.
Coriolis Effect: Deflection of moving objects/large masses due to the rotation of Earth on its axis (EX: currents & missiles) –Northern Hemisphere: RIGHT.
Global Winds and Jet Stream. Global Winds The trade winds blow from east to west in the tropical region. Westerly winds blow west to east in the temperate.
Local and Global Winds. Wind Wind is created by the unequal warming of the Earth (convection currents) Differences in atmospheric pressure cause the movement.
Global and Local Winds.
Atmospheric Circulation. Winds on a Non-Rotating Earth Air at the equator warms and rises. Once aloft, air flows back towards the poles where it cools.
Warm-Up What is the device used for mearsuring air pressure called?
Weather Patterns and Climate Bates
19.2 Pressure Centers and Winds
Global Average Barometric Pressure: January
Chapter 10 Wind: Global Systems.
Global Patterns 5.3 Pages
Presentation transcript:

Class #16 Monday, October 5 Class #16: Monday, October 5 Chapter 7 Global Winds 1

Class #16 Monday, October 52 The surface winds over Earth Are very complicated because of the changing seasons, differences between land and water, and differences in latitude. Can be simplified using a conceptual model. Have been described using a 3-cell model with no land and no seasons. Only temperature differences from equator to pole are included.

Class #16 Monday, October 53

4 Complications of the real Earth Earth has seasons –The ITCZ (sometimes called the thermal equator) shifts latitude with the seasons. –The ITCZ shifts north of the equator in NH summer, and south of the equator in SH summer (NH winter) Earth has large land masses –Continents and oceans set up thermal circulations

Class #16 Monday, October 55 Observed surface pressures Vary with the seasons, requiring both a January and a July depiction Are on average high in the sub-tropics (near 30°) and near the pole Are on average low in the ITCZ and along the polar front (near 60°) In summer are high over the oceans and low over the continents (thermal lows). In winter are high over the continents and low over the oceans.

Class #16 Monday, October 56 Seasonal shifts The ITCZ, the subtropical highs, and the polar front all shift southward in NH winter and northward in NH summer. Seasonal shifts are most intense over Asia, which has the largest continental air mass. The summer monsoon is wet, with low pressure over land; the winter monsoon is dry, with high pressure over land.

Class #16 Monday, October 57

8

9

10

Class #16 Monday, October 511

Class #16 Monday, October 512

Class #16 Monday, October 513

Class #16 Monday, October 514

Class #16 Monday, October 515 Other monsoons Africa, North America, and Australia have monsoon-like wind patterns, particularly in the warm season.

Class #16 Monday, October 516 Winds and pressures (heights) well above the surface Pressures and heights are on average high in the tropics and decrease to lows close to the poles. Upper-level (500mb and above) winds are generally easterlies (blowing east to west) in the tropics and westerlies (blowing west to east) in higher latitudes.

Class #16 Monday, October 517

Class #16 Monday, October 518

Class #16 Monday, October 519

Class #16 Monday, October 520 Jet Streams Jet streams are regions of especially high wind speed in the atmosphere. In the upper-level westerlies, there can be two jet streams, the Polar front jet stream, above the polar front, and the Subtropical jet stream above the subtropical highs. Sometimes these jet streams merge into one.

Class #16 Monday, October 521

Class #16 Monday, October 522

Class #16 Monday, October 523

Class #16 Monday, October 524