240 likes | 365 Views
NATS 101 Lecture 3 Climate and Weather. What is Pressure at 0.8 km? ( Tucson, Arizoina ). Use Equation for Pressure Change. What is Pressure at 1.6 km? ( Denver, Colorado ). Use Equation for Pressure Change. What is Pressure at 8.7 km? ( Mt. Everest ). Use Equation for Pressure Change.
E N D
What is Pressure at 0.8 km?(Tucson, Arizoina) Use Equation for Pressure Change
What is Pressure at 1.6 km?(Denver, Colorado) Use Equation for Pressure Change
What is Pressure at 8.7 km?(Mt. Everest) Use Equation for Pressure Change
Climate and Weather “Climate is what you expect. Weather is what you get.” -Robert A. Heinlein
Weather – The state of the atmosphere: for a specific place at a particular time Weather Elements 1) Temperature 2) Pressure 3) Humidity 4) Wind 5) Visibility 6) Clouds 7) Significant Weather Weather
Surface Station Model Responsible for boxed parameters Temperatures Plotted F in U.S. Sea Level Pressure Leading 10 or 9 is not plotted Examples: 1013.8 plotted as 138 998.7 plotted as 987 1036.0 plotted as 360 Ahrens, p 431
Sky Cover and Weather Symbols Ahrens, p 431 Ahrens, p 431
Wind Barbs Direction Wind is going towards Westerly from the West Speed (accumulated) Each flag is 50 knots Each full barb is 10 knots Each half barb is 5 knots 65 kts from west Ahrens, p 432
SLP pressure temperature dew point cloud cover Ohio State website wind
72 111 58 Decimal point What are Temp, Dew Point, SLP, Cloud Cover, Wind Speed and Direction? Ahrens, p 431 Practice Surface Station Temperate (oF) Pressure (mb) Last Three Digits (tens, ones, tenths) Dew Point (later) Moisture Wind Barb Direction and Speed Cloud Cover Tenths total coverage
42 998 18 Decimal point What are Temp, Dew Point, SLP, Cloud Cover, Wind Speed and Direction? Ahrens, p 431 Practice Surface Station Sea Level Pressure Leading 10 or 9 is not plotted Examples: 1013.8 plotted as 138 998.7 plotted as 987 1036.0 plotted as 360
Surface Map Symbols • Fronts Mark the boundary between different air masses…later Significant weather occurs near fronts Current US Map Ahrens, p 432
Upper-Air Model Responsible for boxed parameters Conditions at specific pressure level • Wind • Temperature (C) • Moisture (Later) • Height above MSL • UA 500mb Analysis Ahrens, p 431 Ahrens, p 427
Climate Climate - Average weather and range of weather, computed over many years. Whole year (mean annual precipitation for Tucson, 1970-present) Season (Winter: Dec-Jan-Feb) Month (January rainfall in Tucson) Date (Average, record high and low temperatures for Jan 1 in Tucson)
Climate of TucsonMonthly Averages Individual months can show significant deviations from long-term, monthly means.
Climate of TucsonProbability of Rain Cool Site:Western Region Climate Center
Climate of TucsonExtreme Rainfall Cool Site:Western Region Climate Center
Climate of TucsonSnow! Cool Site:Western Region Climate Center
Summary • Weather - atmospheric conditions at specific time and place Weather Maps Instantaneous Values • Climate - average weather and the range of extremes compiled over many years Statistical Quantities Expected Values
Reading Assignment • Ahrens Pages 25-30 Problems 2.1-2.4 (2.1 Chapter 2, Problem 1) • Don’t Forgot the 4”x 6” Index Cards… I’m getting antsy for a pop quiz. You must be lusting for one too!