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Question 6: Just to be sure you understand the correlation between the AO and the jet stream, complete the following table: Jet Stream is (weaker/stronger) Jet Stream is (straight/wavy) The cold arctic air is going Weather in Western United States Weather in Eastern United States AO Positive Phase D D D D AO Negative Phase D P B ¤

Question 6: Just to be sure you understand the correlation between the AO and the jet stream, complete the following table: Jet Stream is (weaker/stronger) Jet Stream is (straight/wavy) The cold arctic air is going Weather in Western United States Weather in Eastern United States AO Positive Phase D D D D AO Negative Phase D P B ¤

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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wunderground.com Arctic Oscillation (AO) Weaker Tradewinds Negative Phase (North America & Europe) Cold Air Spills South Warm Air Rows North Weaker, Waver Jet Stream Positive Phase (North America) Cold Air Stays North ( "The Arctic Oscillation (AO) is a pattern of varying pressure and winds over the Northern Hemisphere that can strongly influence mid-latitude weather patterns. When the AO is in its positive phase, jet stream winds are strong and the jet stream tends to blow mostly west to east, with low-amplitude waves (troughs and ridges.) Since the jet stream marks the boundary between cold Arctic air to the north and warm subtropical air to the south, cold air stays bottled up in the Arctic. When the AO is in its negative phase, the winds of the jet stream slow down, allowing the jet to take on more wavy pattern with high- amplitude troughs and ridges. High amplitude troughs typically set up over the Eastern U.S. and Western Europe during negative AO episodes, allowing cold air to spill southwards in those regions and create unusually cold-weather." Stronger, Less Wavy Jet Stream The results of these swings in the AO are further explained in "Patterns in Arctic Weather and Climate". found at http://nsidc.org/cryosphere/arctic-meteorology/weather_climate_patterns.html#¶ Stronger Tradewinds "The positive phase of the Arctic Oscillation brings ocean storms farther north, making the weather wetter in Alaska, Scotland, and Scandinavia and drier in the western United States and the Mediterranean. The positive phase also keeps weather warmer than normal in the eastern United States, but makes Greenland colder than normal." Jet Stream is (weaker/stronger) Jet Stream is (straight/wavy) The cold arctic air is going Weather in Western United States Weather in Eastern United States "In the negative phase of the Arctic Oscillation the patterns are reversed. A strongly negative phase of the Arctic Oscillation brings warm weather to high latitudes, and cold, stormy weather to the more temperate regions where people live." Question 6: Just to be sure you understand the correlation between the AO and the jet stream, complete the following table: AO Positive Phase P AO Negative Phase d
Transcribed Image Text:wunderground.com Arctic Oscillation (AO) Weaker Tradewinds Negative Phase (North America & Europe) Cold Air Spills South Warm Air Rows North Weaker, Waver Jet Stream Positive Phase (North America) Cold Air Stays North ( "The Arctic Oscillation (AO) is a pattern of varying pressure and winds over the Northern Hemisphere that can strongly influence mid-latitude weather patterns. When the AO is in its positive phase, jet stream winds are strong and the jet stream tends to blow mostly west to east, with low-amplitude waves (troughs and ridges.) Since the jet stream marks the boundary between cold Arctic air to the north and warm subtropical air to the south, cold air stays bottled up in the Arctic. When the AO is in its negative phase, the winds of the jet stream slow down, allowing the jet to take on more wavy pattern with high- amplitude troughs and ridges. High amplitude troughs typically set up over the Eastern U.S. and Western Europe during negative AO episodes, allowing cold air to spill southwards in those regions and create unusually cold-weather." Stronger, Less Wavy Jet Stream The results of these swings in the AO are further explained in "Patterns in Arctic Weather and Climate". found at http://nsidc.org/cryosphere/arctic-meteorology/weather_climate_patterns.html#¶ Stronger Tradewinds "The positive phase of the Arctic Oscillation brings ocean storms farther north, making the weather wetter in Alaska, Scotland, and Scandinavia and drier in the western United States and the Mediterranean. The positive phase also keeps weather warmer than normal in the eastern United States, but makes Greenland colder than normal." Jet Stream is (weaker/stronger) Jet Stream is (straight/wavy) The cold arctic air is going Weather in Western United States Weather in Eastern United States "In the negative phase of the Arctic Oscillation the patterns are reversed. A strongly negative phase of the Arctic Oscillation brings warm weather to high latitudes, and cold, stormy weather to the more temperate regions where people live." Question 6: Just to be sure you understand the correlation between the AO and the jet stream, complete the following table: AO Positive Phase P AO Negative Phase d
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