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Transcript
Weather Key Terms for Reference Weather vs climate Atmosphere Temperature Wind Humidity Precipitation Air pressure Fronts What is Meteorology? The study of the atmosphere, weather and climate The atmosphere is the air that surrounds the earth - about 78% Nitrogen, 21% Oxygen and other gasses like carbon dioxide and water vapor. Weather is the conditions of the atmosphere at a given location for a short period of time. It’s caused by the uneven heating of the earth’s surface. Climate is the average weather in an area, from season to season and year to year. Polar Climate Zone Tropical Climate Zone What conditions of the atmosphere are used to describe our weather? Temperature Humidity Wind Precipitation Air Pressure Go to weatherNet to observe the weather in Rye today 5/10/05 12:38:52 AM CURR MIN/M Temperature (°F) 59.6 43.1 / 60.7 Humidity (%) 63.0 61.5 / 97.8 Wind (mph) ESE 5.7 ESE 10.7 0.00 No Rain Toda y 0.00 30.0 5 30.0 4/ 30.0 9 0.02 RATE Current ENT Conditions AX Daily Rain (in) Pressure ("Hg) 0.6 0.8 Weather changes because of moving An air mass is a large body of air with similar temperature and moisture properties throughout. Air Mass Temperature Moisture Continental Polar (cP) Cold Dry Continental Tropical (cT) Hot Dry Maritime Polar (mP) Maritime Tropical (mT) Cool Warm Moist Moist Air mass movement is determined by upper air currents and prevailing winds. Continental Polar - Cold, dry air Originate over Canada Maritime tropical - Warm and Moist Originate over the warm waters of the tropics and Gulf of Mexico. Air Masses Affecting The United States The boundary between 2 air masses is called a front Warm front symbol Precipitation usually occurs as a front moves through Cold front symbol Follow the directions on the sheet to get to the lesson on fronts on WeatherNet When the new, advancing air mass is composed of warm air, this boundary is called a warm front If the advancing air mass is composed of cold air, this boundary is called a cold front. Because of its weight, the air presses down on us and exerts pressure. Pressure systems (Highs and Lows) usually move west to east across the U.S. Low pressure systems bring rain. High-pressure systems bring bright, sunny days with calm weather. A weather map shows how weather changes through the movement of air masses and fronts Links to use to collect weather information: Weather.com https://weather.com/weather/today/l/USNY0996:1:US Weather Underground https://www.wunderground.com/us/ny/rye You can search and try some additional sites if you need more weather information