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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Sea Temperature To predict the effect of El Niño or La Niña events in the future, the National Oceanographic and Atmospheric Administration collects information about sea surface temperature (SST) and atmospheric conditions. They compare monthly temperature averages in the eastern equatorial Pacific Ocean to historical data and calculate the difference (the degree of anomaly) to determine if El Niño conditions, La Niña conditions, or neutral conditions are developing. El Niño is a rise in the average SST above 0.5°C. A decline of the same amount is La Niña. FIGURE 47.8 shows data for 42 years.

Chapter 47, Problem 2DAA, Sea Temperature To predict the effect of El Nio or La Nia events in the future, the National

FIGURE 47.8 Sea surface temperature anomalies (difference from the historical mean) in the eastern equatorial Pacific Ocean. A rise above the dashed red line is an El Niño event, a decline below the blue line is La Niña

What type of event, if any, occurred during the winter of 1982–1983? What about the winter of 2001–2002?

Summary Introduction

To determine: The type of event during the winter of 1982-1983 and 2001-2002.

Concept introduction: EI Nino Southern Oscillation (ENSO) event is an interaction between the ocean-atmosphere climates, during which irregular temperature fluctuation occurs in the equatorial Pacific Oceans. EI Nino and La Nina are the two extremes of this EI Nino Southern Oscillation. During an EI Nino, warm water flows towards the west coast of South America and during a LA Nina, cold water flows towards the western coast of South America.  At other time, water of the Pacific is neutral.

Explanation

The National Oceanographic and Atmospheric Administration collect information regarding sea surface temperature (SST) and different atmospheric conditions to monitor and to observe if climatic events coordinate with the events of EI Nino, La Nina or just neutral in the future. For this purpose, they compare monthly average temperature with historical data in the equatorial Pacific Oceans.  They estimate the difference to determine different conditions that are developing, whether an EI Nino conditions, La Nina conditions, or normal conditions...

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