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Chapter 18: Problem 4

What has been discovered about global climate trends in the past? How do contemporary trends relate to past records?

Short Answer

Expert verified
Historical climate trends show periods of both warming and cooling, with significant variations in atmospheric carbon dioxide and global temperatures. In contrast, contemporary trends show a pronounced steady increase in temperatures globally and a sharp rise in atmospheric CO2 levels, among other deviations from historic patterns.

Step by step solution

01

Understanding Past Climate Trends

To address the first part of the question, one must research historic and prehistoric climate data obtained from sources like ice cores, tree rings, and sediment layers at the bottom of seas, lakes, and ponds. In the past, there were periods of both cooling (Ice Ages) and warming (Inter-glacial periods). The data will also show significant variations in atmospheric carbon dioxide, changes in global temperatures, and variation in rainfall patterns among other climate indicators.
02

Understanding Contemporary Climate Trends

For the second part, one ought to research modern-day climate data sourced from meteorological stations, satellites, and ocean buoys. Scholars have noted a steady increase in global average temperatures, a sharp rise in atmospheric C02 levels, more frequent and intense weather events, among other shifts in various climate indicators.
03

Comparing Past and Contemporary Climate Trends

Lastly, compare the data from the past and present. Look for patterns or trends that show a clear deviation from or convergence to historic norms. This could include the pace of warming, bigger shifts in CO2 levels, or changes in regional climates. Identify key similarities and differences, and summarize the comparison for a clear understanding.

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