How long would it take a ducky to make it back to the spill site?
Requirements: Answers
GEOS 212: Intro to Oceanography NAME ___________________________
Homework #4 (Fall 2023) Due October 6, 2023
Surface Currents in the Pacific and Atlantic Oceans
This homework should be uploaded (including both your written answers and your drawn-on map) as a SINGLE FILE to the Homework #4 folder in the Dropbox on D2L. You can either annotate the Word or PDF version, or you can print the homework out, do it by hand, and then upload a single PDF file that includes a picture of each page.
This assignment is due on 10/6 by 12 noon – NO LATE ASSIGNEMNTS ARE ACCEPTED
Please make sure you do your own work on this exercise. It is fine to work with others, but the information you write down must be in your own words and in your own format.
Identical papers (content & format) will receive zero credit the first time, and will be referred to the Dean of Students for a second offense.
surface currents surface temperature surface salinity
Pacific Ocean currents
We will trace ocean currents by following the travels of a shipload of 29,000 rubber ducks that spilled into the North Pacific in 1992, (see
and ).
The spill occurred right above the Chinook Trough, at 45°N and 180°W (located at the big blue X on the accompanying map), within the North Pacific Current, and the duckies have since been carried all around the world by the surface currents. (see )
1. On the above map, please draw the path a ducky could take from the spill site (X), past California, past Hawaii, and then past Japan, assuming that it followed the North Pacific Subtropical Gyre along the surface currents. How long would it take a ducky to make it back to the spill site?
To do this calculation, assume that the average rate of travel is 10 km/day, measure the distance that the ducky traveled on your full-size World Map (in cm), and then convert the distance to kilometers (multiply by the map scale, 358 km/cm). This gives you the distance in km, and you know the rate, so solve for time (in days). Show all of your work.
2a. What are the names of the 4 main currents that the duckies will travel along during their transit of the North Pacific Subtropical Gyre? (turning south along N. America, in RED on previous page)
2b. What are the names of the 3 currents that the duckies travel in as they go around the North Pacific Subpolar Gyre? (turning north along N. America, in PURPLE on previous page)
3. The news article says they actually traveled through the Arctic on a trek 27,000 km (~17,000 mi) long and took 11 years to travel from the spill site to the New Hebrides Islands, north of Scotland. Calculate their average speed in km/day. (Remember: R=D/T; 1 yr = 365 days, & km/yr * yr/day = km/day)
Atlantic Ocean currents: In 1999, Tori Murden rowed 2962 miles (about 4767 km) across the Central Atlantic, from northwestern Africa to the tip of Florida (see and ). It took 81 days, many of which were spent trying to keep her boat from capsizing in large tropical storms. And in 2008, after spending 75 days in a small boat, 17-year-old Rachel Flanders rowed across the Atlantic ()!
You decide that a real adventure would be to travel in a small rowboat, by yourself, from Miami (Florida) to Sydney (Australia). On the map below:
Strict Rules:
** You may NOT go through the Panama Canal!
** The Antarctic Circumpolar Current does NOT go near Sydney – only the East Australia Current (EAC) does, so the EAC must be the last current!
On the map below:
4. Draw your course from Miami to Sydney and label each of the currents that you follow. Follow the surface currents as much as possible because rowing against a current is tough work! If there are parallel currents running in opposite directions, you can jump from one to the other, but you must list both!
5. Tori went 4767km in 81 days for her trip. What was her rate in km/day? ________________
6. Measure your distance along the path you chose in Q4 on your BIG map (in cm) and convert it to a real-world distance by multiplying by the map scale (1 cm = 358 km).
Distance in cm on map = ______________ Distance on Earth in km = ______________
7. If you row as fast as Tori did, how long would it take (in days) to row from Miami to Sydney based on the length of your voyage (from Q6) and your speed (from Q5)? _______________ days
8. How much shorter is the route from Miami to Sydney if you go through the Panama Canal? Again, Measure this distance on your BIG map (in cm), and convert it to a real world distance by multiplying by the map scale.
Distance through the Panama Canal in cm = __________ Distance on Earth in km = ______________
GEOS 212: Intro to Oceanography NAME ___________________________ Homework #4 (Fall 2023) Due October 6, 2023 Surface Currents in the Pacific and Atlantic Oceans This homework should be uploaded (including both your written answers and your drawn-on map) as a SINGLE FILE to the Homework #4 folder in the Dropbox on D2L. You can either annotate the Word or PDF version, or you can print the homework out, do it by hand, and then upload a single PDF file that includes a picture of each page. This assignment is due on 10/6 by 12 noon – NO LATE ASSIGNEMNTS ARE ACCEPTED Please make sure you do your own work on this exercise. It is fine to work with others, but the information you write down must be in your own words and in your own format. Identical papers (content & format) will receive zero credit the first time, and will be referred to the Dean of Students for a second offense. surface currents surface temperature surface salinity Pacific Ocean currents We will trace ocean currents by following the travels of a shipload of 29,000 rubber ducks that spilled into the North Pacific in 1992, (see http://www.oldsaltblog.com/2014/05/friendly-floatees-what-29000-yellow-ducks-red-beavers-blue-turtles-and-green-frogs-tells-us-about-ocean-dumping/ and http://www.mnn.com/earth-matters/wilderness-resources/stories/what-can-28000-rubber-duckies-lost-at-sea-teach-us-about). The spill occurred right above the Chinook Trough, at 45°N and 180°W (located at the big blue X on the accompanying map), within the North Pacific Current, and the duckies have since been carried all around the world by the surface currents. (see http://en.wikipedia.org/wiki/Friendly_Floatees)
1. On the above map, please draw the path a ducky could take from the spill site (X), past California, past Hawaii, and then past Japan, assuming that it followed the North Pacific Subtropical Gyre along the surface currents. How long would it take a ducky to make it back to the spill site? To do this calculation, assume that the average rate of travel is 10 km/day, measure the distance that the ducky traveled on your full-size World Map (in cm), and then convert the distance to kilometers (multiply by the map scale, 358 km/cm). This gives you the distance in km, and you know the rate, so solve for time (in days). Show all of your work. 2a. What are the names of the 4 main currents that the duckies will travel along during their transit of the North Pacific Subtropical Gyre? (turning south along N. America, in RED on previous page) 2b. What are the names of the 3 currents that the duckies travel in as they go around the North Pacific Subpolar Gyre? (turning north along N. America, in PURPLE on previous page) 3. The news article says they actually traveled through the Arctic on a trek 27,000 km (~17,000 mi) long and took 11 years to travel from the spill site to the New Hebrides Islands, north of Scotland. Calculate their average speed in km/day. (Remember: R=D/T; 1 yr = 365 days, & km/yr * yr/day = km/day)
Atlantic Ocean currents: In 1999, Tori Murden rowed 2962 miles (about 4767 km) across the Central Atlantic, from northwestern Africa to the tip of Florida (see http://en.wikipedia.org/wiki/Tori_Murden and http://news.nationalgeographic.com/news/2003/06/0618_030618_torimurdenmcclure.html). It took 81 days, many of which were spent trying to keep her boat from capsizing in large tropical storms. And in 2008, after spending 75 days in a small boat, 17-year-old Rachel Flanders rowed across the Atlantic (http://news.bbc.co.uk/1/hi/england/manchester/7245940.stm)! You decide that a real adventure would be to travel in a small rowboat, by yourself, from Miami (Florida) to Sydney (Australia). On the map below: Strict Rules: ¥ ** You may NOT go through the Panama Canal! ¥ ** The Antarctic Circumpolar Current does NOT go near Sydney – only the East Australia Current (EAC) does, so the EAC must be the last current! On the map below: 4. Draw your course from Miami to Sydney and label each of the currents that you follow. Follow the surface currents as much as possible because rowing against a current is tough work! If there are parallel currents running in opposite directions, you can jump from one to the other, but you must list both! 5. Tori went 4767km in 81 days for her trip. What was her rate in km/day? ________________ 6. Measure your distance along the path you chose in Q4 on your BIG map (in cm) and convert it to a real-world distance by multiplying by the map scale (1 cm = 358 km). Distance in cm on map = ______________ Distance on Earth in km = ______________ 7. If you row as fast as Tori did, how long would it take (in days) to row from Miami to Sydney based on the length of your voyage (from Q6) and your speed (from Q5)? _______________ days 8. How much shorter is the route from Miami to Sydney if you go through the Panama Canal? Again, Measure this distance on your BIG map (in cm), and convert it to a real world distance by multiplying by the map scale. Distance through the Panama Canal in cm = __________ Distance on Earth in km = ______________
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