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Where on Earth...? MISR Mystery Quizzes
Where on Earth...? MISR Mystery Image Quiz #2
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(See quiz questions or a list of previous quizzes.)

Where on Earth...? MISR Mystery Image Quiz #2

Here's another chance to play geographical detective! This Multi-angle Imaging SpectroRadiometer (MISR) image covers an area measuring 355 kilometers x 287 kilometers, and was captured by the instrument's vertical-viewing (nadir) camera on August 14, 2000. This mystery concerns the large lake near the left-hand side of the image, halfway down from the top. Use any reference materials you like and answer the following three questions:

1. The lake has two commonly used names. What are they?

The large lake near the left-hand side of the image is bordered by Switzerland, Germany, and Austria, and has several names. Lake Constance (also written as Konstanz and "Lac de Constance") and Bodensee are the most common names. Another, used by the German residents of the lake, is "Schwäbisches Meer" (Swabian Sea).

2. What process formed the lake's basin?
(A) Meteor impact,
(B) Human excavation,
(C) Glacial erosion,
(D) Volcanic activity.

Answer: (C)The lake's basin was formed by glacial activities.

3. Which one of the following statements about the lake is false?
(A) There is an international airport within 100 kilometers,
(B) Remedial efforts to mitigate eutrophication were first initiated in the 1990's,
(C) Millions of people rely on the lake for drinking water,
(D) A lakeside town hosts an annual celebration of Celtic music.

Answer: (B) Lake Constance provides drinking water for about 4 million people. Zurich International Airport is about 70 kilometers from the lakeside town of Konstanz, Germany. An annual Celtic music festival is hosted on the Swiss shores of Lake Constance at the town of Rorschach.

Eutrophication, or the process of nutrient enrichment, is rapidly accelerated when excess phosphorous and nitrogen is discharged to a water body from wastewater and fertilizers. This leads to overproduction of algae and aquatic plants, exhaustion of available oxygen, loss of some fish species, and the multiplication of anaerobic bacteria. In recognition of the value of Lake Constance, efforts to mitigate eutrophication were initiated in the 1970's.

50 people from all over the world sent in responses before the deadline. Individuals who answered all three questions correctly are listed below. The prize winners are indicated by asterisks.

1. Carolyn House, Seattle, WA, USA*
2. CFM, JB & CLP, New Braunfels, TX, USA*
3. Barbara Thalmann, Hauptwil, Switzerland*
4. Helmut Wider, Konstanz, Germany
5. Christina Cecco, Konstanz, Germany
6. Ugo Taddei, Germany
7. Julian Cooke, Bourne, England
8. Stefan Biebl, Stuttgart, Germany
9. Federica Tamburini, Neuchâtel, Switzerland
10. Simon Baeumler, Munich, Germany
11. Marius Veltmaat, The Netherlands
12. Ulrich Enderle, Bramstedtlund, Germany
13. Jan, Rosmalen, The Netherlands
     Bob, Reno, NV, USA
     Thorkell, Reykjavik, Iceland
     Harvey, London, England
14. Christian Gfeller, Zürich, Switzerland
15. William Kinnersley, Lawrence, KS, USA
16. Luc Majno, Caraquet, New Brunswick, Canada
17. Diane Melin, Pasadena, CA, USA

In light of the great response to the recent "What Place is This?" quiz, a new "Where on
Earth...?" mystery will appear as the MISR "image of the week" approximately once per month.
A new image of the week is released every Wednesday at noon Pacific time on the MISR home page, The image also appears on the Earth Observatory,, and on the Atmospheric Sciences Data Center home page,, though usually with a several-hour delay.

MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science, Washington, DC. The Terra satellite is managed by NASA's Goddard Space Flight Center, Greenbelt, MD. JPL is a division of the California Institute

Credit: Image credit: NASA/GSFC/LaRC/JPL, MISR Team.