ATM OCN 100 Summer ATM OCN Summer 2001 LECTURE 1B OBSERVATIONS of EARTH'S ATMOSPHERE (con’t.) u A. Introduction Practical Questions u B. The Planet Earth & Earth Systems u C. Survey of Planet Earth’s Atmosphere u D. Weather & Climate Elements u E. Probing the Atmosphere

ATM OCN 100 Summer Announcements u Sign-up –Class list –Official registration –Course Syllabus F NOTE Change Wed. to Fri. 21 Dec. on back –Honors Students u Class Note-taker for McBurney Center

ATM OCN 100 Summer Announcements u Sign-up –Class list –Official registration –Course Syllabus

ATM OCN 100 Summer ATM OCN Summer 2001 LECTURE 1B OBSERVATIONS of EARTH'S ATMOSPHERE u A. INTRODUCTION: Practical Questions – What constitutes the atmosphere? – What can we learn about the atmosphere? – Why do we want to know about it?

ATM OCN 100 Summer Earth-rise over Moon Apollo 8 22 Dec 1968 NASA-JSC

ATM OCN 100 Summer

7 ATM OCN Summer 2001 LECTURE 1B OBSERVATIONS of EARTH'S ATMOSPHERE (con’t.) u A. Introduction Practical Questions u B. The Planet Earth & Earth Systems

ATM OCN 100 Summer B. THE PLANET EARTH & EARTH SYSTEMS u Uniqueness of Planet Earth – Water Planet – The planet with life u Components of Planet Earth System – Lithosphere – Atmosphere – Hydrosphere – Cryosphere – Biosphere

ATM OCN 100 Summer From Geog. 101 UW-Stevens Point  Interactions within System – Weathering – Hydrological cycle

ATM OCN 100 Summer C. SURVEY of PLANET EARTH’S ATMOSPHERE u Importance of Earth's atmosphere – Moderates temperature of planet; – Shields life from harsh space environment; – Provides life with water, oxygen, etc. u Overall Dimensions of Earth's atmosphere – About 100 km (62 mi) thick; – Compare with 6370 km (3950 mi) earth radius; but....

VERTICAL VARIATION in ATMOSPHERIC DENSITIES [Source U.S. Std. Atmosphere, 1976]

ATM OCN 100 Summer

13 SUNRISE FROM SPACE From STS-47 (JSC-NASA)

ATM OCN 100 Summer C. SURVEY OF PLANET EARTH’S ATMOSPHERE (con’t) u Importance of Earth's atmosphere u Overall Dimensions of Earth's atmosphere u Comparison with other components of Earth System

ATM OCN 100 Summer ESTIMATED MASSES of EARTH SYSTEM COMPONENTS [Source: J.Y. Wang, 1975]

ATM OCN 100 Summer D. WEATHER-CLIMATE ELEMENTS u What we need to Know – Weight (mass), Energy, Constituents, Motion. u Observed Weather-Climate Elements – AIR PRESSURE – AIR TEMPERATURE – ATMOSPHERIC HUMIDITY – PRECIPITATION – CLOUD TYPE, AMOUNT – WINDS (SPEED & DIRECTION)

MADISON’S CURRENT WEATHER Madison Weather at 1000 AM CDT TUE JUN Updated twice an hour at :05 and :25 Sky/Weather: SUNNY Temperature: 70 F (21 C) Dew Point: 57 F (13 C) Relative Humidity: 63% Wind: SE9 MPH Barometer: 30.04S ( mb)

ATM OCN 100 Summer E. PROBING THE ATMOSPHERE u Surface vs. Aloft – Locations – Problems u Surface Weather Station – Human observer, – Thermometers, barometers, rain gauges, wind instruments, etc.

ATM OCN 100 Summer Traditional Surface Weather Station

ATM OCN 100 Summer Automated Weather Station (ASOS)

ATM OCN 100 Summer NWS & FAA Automatic Weather Stations

ATM OCN 100 Summer Automated Weather Buoy

ATM OCN 100 Summer First Order Stations & Cooperative Observer Network (National Climate Data Center, 2001)

ATM OCN 100 Summer E. PROBING THE ATMOSPHERE (con’t.) u Other Observation Tools/Platforms – Need for F Rugged instruments F Remote sensing

ATM OCN 100 Summer Weather Kites (ca. 1894)

ATM OCN 100 Summer Aircraft Weather Observations (ca. 1934)

ATM OCN 100 Summer Radiosonde

28 Radiosonde (con’t.)

ATM OCN 100 Summer Radiosonde (con’t.)

ATM OCN 100 Summer RADIOSONDE LOCATIONS

ATM OCN 100 Summer Stratospheric Balloons

ATM OCN 100 Summer Meteorological Rockets (Rocketsondes)

ATM OCN 100 Summer Weather Radar See Pg Moran & Morgan (1997)

ATM OCN 100 Summer Principles of Weather Radar (in reflectivity mode)

ATM OCN 100 Summer Weather Radar (con’t.)

ATM OCN 100 Summer Weather Radar (con’t.)

ATM OCN 100 Summer Principles of Weather Radar (in velocity or Doppler mode) See Fig Moran & Morgan (1997)

ATM OCN 100 Summer NWS DOPPLER RADAR SITES

ATM OCN 100 Summer Radar Reflectivity 7 Sep 2000

ATM OCN 100 Summer Current Radar Reflectivity

ATM OCN 100 Summer Composite National Radar Image

ATM OCN 100 Summer Weather Satellites and the Space Science & Engineering Center (SSEC)

ATM OCN 100 Summer See Fig – Moran & Morgan (1997)

ATM OCN 100 Summer Early GOES Satellite

ATM OCN 100 Summer Geosynchronous Satellite Imaging Field of View

ATM OCN 100 Summer ATS-III in 1968

ATM OCN 100 Summer Recent GOES Satellite

ATM OCN 100 Summer GOES-11 in 2000

ATM OCN 100 Summer Nighttime lights from DMSP Satellites

ATM OCN 100 Summer Visible vs. IR Images

ATM OCN 100 Summer Current Visible Satellite Image Clouds

ATM OCN 100 Summer Current Infrared Satellite Image

ATM OCN 100 Summer Current Water Vapor Satellite Image

ATM OCN 100 Summer Man Computer Data Acquisition System (McIDAS) at SSEC/UW-Madison

ATM OCN 100 Summer See Fig – Moran & Morgan (1997)

ATM OCN 100 Summer

57 TIROS in 1960s

ATM OCN 100 Summer Polar Orbiting (POES) Satellite NOAA-M Summer 2002 GFSC-NASA

ATM OCN 100 Summer MODIS in 2000 (Moderate-resolution Imaging Spectroradiometer)

ATM OCN 100 Summer MODIS

61 Wind Profiler (FSL) See Pg. 352 Moran & Morgan (1997)

ATM OCN 100 Summer Wind Profiler Network (FSL)

ATM OCN 100 Summer F. VISUALIZING THE WEATHER: THE SURFACE WEATHER MAP u Meaning of synoptic weather analysis – synoptic: “syn” = same + “optic” = to see u Goal of synoptic weather analysis u Requirements for synoptic weather analysis – Same time of observation – Uniform instruments & observation techniques

ATM OCN 100 Summer MAP of TIME ZONES U.S. Naval Observatory, 1996

ATM OCN 100 Summer F. THE SURFACE WEATHER MAP (con’t.) u Historical perspective – First weather map in 1819 of 1783 Storm; – Early U.S. Weather maps in 1870’s.

ATM OCN 100 Summer Surface weather map Sep. 1872

ATM OCN 100 Summer Surface weather map June 2002

ATM OCN 100 Summer F. THE SURFACE WEATHER MAP (con’t.) u Interpretation of modern surface weather maps where...

ATM OCN 100 Summer Sample Modern Weather Map Figure I.3, Moran & Morgan (1997)

ATM OCN 100 Summer ON THE SURFACE WEATHER MAP F F Pressure systems – –Isobars (“iso” + “bar”) – –Highs & Lows F F Winds – –Circulation around Highs & Lows – –The “Hand-twist Model”

ATM OCN 100 Summer Flow around High Pressure Fig Moran & Morgan (1997)

ATM OCN 100 Summer Air Converging Aloft Fig Moran & Morgan (1997)

ATM OCN 100 Summer Flow around Low Pressure Fig Moran & Morgan (1997)

ATM OCN 100 Summer Air Diverging Aloft Fig Moran & Morgan (1997)

ATM OCN 100 Summer ON THE SURFACE WEATHER MAP   Pressure systems F F Winds F F Clouds   Mainly around lows F F Temperature Patterns – –Isotherms (“iso” + “therms”) F F Fronts – –Cold fronts, warm fronts & stationary fronts

ATM OCN 100 Summer Warm Front

ATM OCN 100 Summer Cold Front

ATM OCN 100 Summer Stationary Fronts

ATM OCN 100 Summer Current Surface Weather Map with Isobars (“iso” = equal & “bar” = weight), Fronts and Radar Isobars

ATM OCN 100 Summer Clouds Current Visible Satellite Image

ATM OCN 100 Summer Current Temperatures ( ° F) & Isotherms (“iso” = equal +”therm” = temperature)

ATM OCN 100 Summer Current Surface Weather Map with Isobars (“iso” = equal & “bar” = weight), Fronts and Radar Isobars

ATM OCN 100 Summer Rule of Thumb! Weather Systems move: u From West to East in midlatitudes u From East to West in tropics

ATM OCN 100 Summer Yesterday’s Surface Weather Map with Isobars (“iso” = equal & “bar” = weight), Fronts and Radar Isobars

ATM OCN 100 Summer Current Surface Weather Map with Isobars (“iso” = equal & “bar” = weight), Fronts and Radar Isobars

ATM OCN 100 Summer Tomorrow AM Forecast Map

ATM OCN 100 Summer Track of Hurricane Erin

ATM OCN 100 Summer

89 QUIZ!!! u Which way does the wind circulate around a high pressure center? u And around a Low? u Answers….