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Science Bowl Question

📅 NSB Round Robin 2012🎓 HS🔄 Round 4#️⃣ Question 5 TOSS UP📝 Multiple Choice

Upon which of the following is the Southern Oscillation Index based?

W) The observed sea level pressure difference between Darwin and Tahiti
X) The sea surface temperature between Darwin and Tahiti
Y) The ozone levels at Toronto and Montreal
Z) The amount of conduction at the equator
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