EARTH’S SEASONSEARTH’S SEASONSDECEMBER 22DECEMBER 22

NORTHERN HEMISPHERE:NORTHERN HEMISPHERE:WinterWinter

SOUTHERN HEMISPHERE:SOUTHERN HEMISPHERE:SummerSummer

MARCH 21MARCH 21

NORTHERN HEMISPHERE:NORTHERN HEMISPHERE:SpringSpring

SOUTHERN HEMISPHERE:SOUTHERN HEMISPHERE:FallFall

JUNE 22JUNE 22

NORTHERN HEMISPHERE:NORTHERN HEMISPHERE:SummerSummer

SOUTHERN HEMISPHERE:SOUTHERN HEMISPHERE:WinterWinter

September 23September 23

NORTHERN HEMISPHERE:NORTHERN HEMISPHERE:FallFall

SOUTHERN HEMISPHERE:SOUTHERN HEMISPHERE:SpringSpring

Average Day of Heating at the Surface

WESTEAST

6:00AMNOON3:00PM7:00PM

SUNRISESUNSET

MAX HEATING

TEMPERATURE CONTROLSTEMPERATURE CONTROLS1. LATITUDE(closer to the equator the warmer the daily temps)

30N

EQ

60N

2. LAND vs WATER(coastal places cooler summers warmer winters)

OceanStation A75F/60F Station B

95F/45F

Summer/Winter Temps

Ocean

3. OCEAN CURRENTS(places by warm current are warmer than places by a cold current)

Station A65F

Station B71F

4. ELEVATION(higher up the cooler it gets)

Station A72F(500Ft)

Station B60F(5000FT)

WEATHER MEASURING INSTRUMENTSWEATHER MEASURING INSTRUMENTS

10F

20F

30F

THERMOMETER(used to measure outside air temp)Example below shows the temp at 30F

WIND VANE(used to measure wind direction)ANOMETER(also on the wind vane used to measure speed located in blueOn this diagram)

990mb

1000mb

1010mb1020mb

BAROMETER(used to measure the air pressure outside your station)