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Figure 6A-5 displays the marine observations and model data for the North Atlantic Ocean valid for nearly the same time as Figure 6A-3 and Figure 6A-4. The pattern of isobars (lines of equal air pressure drawn on this map at a 4-mb interval, labeled with coded values such as 90 meaning 990 mb, 00 meaning 1000 mb, and 12 meaning 1012 mb) appearing on the map reveals an atmospheric low pressure system (cyclone) centered at about 52°N, 37°W. As is typical with Northern Hemisphere atmospheric low-pressure systems, the associated horizontal wind pattern (indicated by winds barbs plotted around the the low-pressure center) exhibits motion as viewed from above. (Note: The wind arrows plotted on the map point in the direction towards which the wind is blowing. For wind speed, each full “feather" on arrows denotes 10 knots and each half-feather signifies 5 knots. Blue wind arrows denote ship observations and red from buoys.) a. clockwise b. counterclockwise Marine Observations Vald for February 13, 2020 12 GMT Model Pressures Vald for February 13, 2020 12 GMT (6 Hour Forecast) 7ON 60N SON 40N 60w Sow 40W 30W 20w 10W OE 10E

Figure 6A-5 displays the marine observations and model data for the North Atlantic Ocean valid for nearly the same time as Figure 6A-3 and Figure 6A-4. The pattern of isobars (lines of equal air pressure drawn on this map at a 4-mb interval, labeled with coded values such as 90 meaning 990 mb, 00 meaning 1000 mb, and 12 meaning 1012 mb) appearing on the map reveals an atmospheric low pressure system (cyclone) centered at about 52°N, 37°W. As is typical with Northern Hemisphere atmospheric low-pressure systems, the associated horizontal wind pattern (indicated by winds barbs plotted around the the low-pressure center) exhibits motion as viewed from above. (Note: The wind arrows plotted on the map point in the direction towards which the wind is blowing. For wind speed, each full “feather" on arrows denotes 10 knots and each half-feather signifies 5 knots. Blue wind arrows denote ship observations and red from buoys.) a. clockwise b. counterclockwise Marine Observations Vald for February 13, 2020 12 GMT Model Pressures Vald for February 13, 2020 12 GMT (6 Hour Forecast) 7ON 60N SON 40N 60w Sow 40W 30W 20w 10W OE 10E

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
Chapter1: The Study Of Minerals
Section: Chapter Questions
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**22. Figure 6A-5** displays the marine observations and model data for the North Atlantic Ocean valid for nearly the same time as Figure 6A-3 and Figure 6A-4. The pattern of isobars (lines of equal air pressure drawn on this map at a 4-mb interval, labeled with coded values such as 90 meaning 990 mb, 00 meaning 1000 mb, and 12 meaning 1012 mb) appearing on the map reveals an atmospheric low-pressure system (cyclone) centered at about 52°N, 37°W. As is typical with Northern Hemisphere atmospheric low-pressure systems, the associated horizontal wind pattern (indicated by winds barbs plotted around the low-pressure center) exhibits ______________ motion as viewed from above. (Note: The wind arrows plotted on the map point in the direction towards which the wind is blowing. For wind speed, each full “feather” on arrows denotes 10 knots and each half-feather signifies 5 knots. Blue wind arrows denote ship observations and red from buoys.) a. clockwise b. counterclockwise **Explanation of the Graph/Diagram:** - **Isobars:** These are lines that connect points of equal air pressure on the map, depicted at 4-mb intervals. The numbers along these lines (e.g., 90, 00, 12) denote air pressure in millibars (mb). The values indicate the pressure levels; 990 mb (90), 1000 mb (00), and 1012 mb (12). - **Low-Pressure System:** Located at approximately 52°N latitude and 37°W longitude, this is characteristically represented by closely spaced isobars which form closed loops around the center, indicating a cyclonic system. - **Wind Patterns:** Indicated by wind barbs, which show the horizontal wind direction and speed. - **Arrow Direction:** Indicates the direction the wind is blowing towards. - **Wind Speed:** Demonstrated by the feathers on the arrows. A full feather signifies 10 knots, and a half-feather signifies 5 knots. Blue arrows represent ship observations, while red arrows represent buoy observations. In conclusion, this visualization illustrates the typical counterclockwise rotation around a low-pressure system in the Northern Hemisphere, characterized by inward spiraling of the wind towards the low-pressure center.
Transcribed Image Text:**22. Figure 6A-5** displays the marine observations and model data for the North Atlantic Ocean valid for nearly the same time as Figure 6A-3 and Figure 6A-4. The pattern of isobars (lines of equal air pressure drawn on this map at a 4-mb interval, labeled with coded values such as 90 meaning 990 mb, 00 meaning 1000 mb, and 12 meaning 1012 mb) appearing on the map reveals an atmospheric low-pressure system (cyclone) centered at about 52°N, 37°W. As is typical with Northern Hemisphere atmospheric low-pressure systems, the associated horizontal wind pattern (indicated by winds barbs plotted around the low-pressure center) exhibits ______________ motion as viewed from above. (Note: The wind arrows plotted on the map point in the direction towards which the wind is blowing. For wind speed, each full “feather” on arrows denotes 10 knots and each half-feather signifies 5 knots. Blue wind arrows denote ship observations and red from buoys.) a. clockwise b. counterclockwise **Explanation of the Graph/Diagram:** - **Isobars:** These are lines that connect points of equal air pressure on the map, depicted at 4-mb intervals. The numbers along these lines (e.g., 90, 00, 12) denote air pressure in millibars (mb). The values indicate the pressure levels; 990 mb (90), 1000 mb (00), and 1012 mb (12). - **Low-Pressure System:** Located at approximately 52°N latitude and 37°W longitude, this is characteristically represented by closely spaced isobars which form closed loops around the center, indicating a cyclonic system. - **Wind Patterns:** Indicated by wind barbs, which show the horizontal wind direction and speed. - **Arrow Direction:** Indicates the direction the wind is blowing towards. - **Wind Speed:** Demonstrated by the feathers on the arrows. A full feather signifies 10 knots, and a half-feather signifies 5 knots. Blue arrows represent ship observations, while red arrows represent buoy observations. In conclusion, this visualization illustrates the typical counterclockwise rotation around a low-pressure system in the Northern Hemisphere, characterized by inward spiraling of the wind towards the low-pressure center.
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