Transcript This MHS windsx

WINDS
• WINDS ARE CAUSED BY DIFFERENCES IN AIR PRESSURE DUE TO HEATING DIFFERENCES ON EARTH.
• WIND IS THE MOVEMENT OF AIR FROM HIGH PRESSURE TO LOW PRESSURE
NATURE ATTEMPTS TO KEEP EVERYTHING EQUAL AND BALANCED.
YOU DO NOT HAVE THIS SLIDE
ADD THIS INFO ON THE RIGHT SPACE
MEASURING AIR PRESSURE
•BAROMETER:
• THE DEVICE USED TO MEASURE AIR PRESSURE
ISOBARS AND AIR PRESSURE
• AIR PRESSURE IS AN IMPORTANT FACTOR AFFECTING WEATHER.
• CHANGES IN AIR PRESSURE HELP WEATHER FORECASTERS PREDICT HOW THE
WEATHER WILL CHANGE.
• AIR PRESSURE READINGS FROM BAROMETERS ARE SHOWN ON WEATHER
MAPS LIKE THE ONE BELOW WITH LINES CALLED ISOBARS.
• ISOBARS ARE LINES ON THE MAP DRAWN TO CONNECT AREAS THAT HAVE
THE SAME AIR PRESSURE.
ISOBARS AND WEATHER
WHAT TYPES OF WINDS ARE THERE?
• GLOBAL WINDS
• LOCAL WINDS
• STARTING WITH GLOBAL
IT IS NOT THAT EASY !!
DIAGRAM ON THE BOARD
HTTPS://YOUTU.BE/8QLJ93UKT2C UP TO 4:56
GLOBAL
WINDS
These regions
of high and low
pressure create
global wind
patterns which
determine the
climates for
those regions.
WHY ARE THE ARROWS NOT STRAIGHT?
BECAUSE THERE IS CORIOLIS EFFECT
HOW DO YOU NAME THE WINDS?
• WINDS ARE ALWAYS NAMED BY
WHERE THEY COME FROM.
WHAT CAUSES THE WINDS TO BLOW IN THOSE
DIRECTIONS?
• BECAUSE THE EARTH ROTATES THE WINDS SEEM TO CURVE, THIS
DEFLECTION IS CALLED THE
CORIOLIS EFFECT.
• HTTPS://YOUTU.BE/DOTKDYYDF5C FROM 1:18 TO 3:54
• YOUR FINAL DIAGRAM ON PAGE 55 SHOULD LOOK LIKE
WHAT WERE THE TWO DIFFERENT TYPES OF WINDS?
• GLOBAL WINDS AND ?
• LOCAL WINDS!
• WHAT TIME IS IT ? HOPEFULLY IT IS
8:35AM
• IT IS BREAK TIME!!! 5 MIN
ANTICYCLONE AND CYCLONE AREAS
• CYCLONES, OR LOWS (CENTERS OF LOW PRESSURE), AND ANTICYCLONES, OR HIGHS (HIGHPRESSURE CENTERS). IN THE NORTHERN HEMISPHERE, WINDS AROUND A LOW (CYCLONE) ARE
COUNTERCLOCKWISE AND INWARD. AROUND A HIGH (ANTICYCLONE), WINDS ARE
CLOCKWISE AND OUTWARD. IN THE SOUTHERN HEMISPHERE, THE CORIOLIS EFFECT CAUSES
WINDS TO MOVE IN THE OPPOSITE DIRECTIONS
• BECAUSE AIR RISES AND COOLS IN LOW-PRESSURE CENTERS, CLOUDY CONDITIONS AND
PRECIPITATION ARE OFTEN ASSOCIATED WITH THEIR PASSAGE. IN HIGH-PRESSURE CENTERS,
DESCENDING AIR IS COMPRESSED AND WARMED; THEREFORE, CLOUD FORMATION AND
PRECIPITATION ARE UNLIKELY, AND "FAIR" WEATHER IS USUALLY EXPECTED
Sinking air near high-pressure systems inhibits the formation of clouds, so highs are associated with clear, dry weather.
Rising air near low-pressure systems produces clouds and rain.
LOCAL WINDS ARE CALLED
BREEZES OR MONSOON
TO UNDERSTAND LOCAL BREEZES WE
NEED PONDER A FEW QUESTIONS:
• WHICH HEATS UP FASTER AND GETS HOTTER… LAND OR WATER?
• WHICH COOLS DOWN FASTER AND GETS COLDER…LAND OR
WATER?
• DURING DAY…WHEN THE SUN IS OUT…WHICH WOULD BE
WARMER…THE OCEAN OR THE LAND?
• DURING NIGHT…WHEN THE SUN IS DOWN… WHICH WOULD BE
COOLER… THE OCEAN OR THE LAND?
• HTTPS://YOUTU.BE/ZQV72YZMJYC
A QUICK REVIEW:
• DOES HOT AIR HAVE HIGH OR LOW PRESSURE?
• DOES COOL AIR HAVE HIGH OR LOW PRESSURE?
• HOW DO YOU NAME A BREEZE OR WIND?
HTTP://WWW.CLASSZONE.COM/BOOKS/EARTH_SCIENCE/TERC/CONTENT/VISUALIZATIONS/ES1903/ES1903PAGE01.CFM
LOCAL BREEZES
1.
2.
3.
4.
5.
6.
Is it day or night?
Which is hotter the land or the water?
What temperature of air is above each?
Is the air above land high pressure or low pressure?
Is the air above water high pressure or low pressure?
To create a breeze, air travels from _________
pressure to ________ pressure.
7. What type of breeze is this?
LOCAL BREEZES
1.
2.
3.
4.
5.
6.
Is it day or night?
Which is hotter the land or the water?
What temperature of air is above each?
Is the air above land high pressure or low pressure?
Is the air above water high pressure or low pressure?
To create a breeze, air travels from _________
pressure to ________ pressure.
7. What type of breeze is this?
SEASON:
SEASON:
MONSOON ARE BREEZES AT CONTINENTAL SCALE
•
IDENTIFY H AND L PRESSURE ZONES ON THE OCEAN AND ON THE LAND IN EACH SEASON
•
DRAW THE HEADS OF ARROWS INDICATING THE WIND DIRECTION IN EACH SEASON
•
COLOR IN RED THE WARM WIND AND IN BLUE THE COLD WIND
• REMEMBER YOU HAVE TEST #2: WEATHER NEXT LESSON
• REVIEW YOUR NOTES FROM PAGE 45 TO PAGE 56
• REVIEW STUDY GUIDE PAGE 10 FROM
TO
TORNADOS VS HURRICANE
HTTPS://WWW.YOUTUBE.COM/WAT
CH?V=W0LSKBE_QFA
WEATHER REVIEW
HTTP://SLIDEPLAYER.COM/SLIDE/1448039/