{"id":3741,"date":"2022-04-22T22:13:31","date_gmt":"2022-04-22T22:13:31","guid":{"rendered":"https:\/\/highclasswriters.com\/blog\/?p=3741"},"modified":"2022-04-22T22:13:33","modified_gmt":"2022-04-22T22:13:33","slug":"ice-core-data-from-90000-to-10000-years-before-present","status":"publish","type":"post","link":"https:\/\/highclasswriters.com\/blog\/ice-core-data-from-90000-to-10000-years-before-present\/","title":{"rendered":"ice core data from 90,000 to 10,000 years before present"},"content":{"rendered":"\n
  1. This assignment explores ice core data from 90,000 to 10,000 years before present. The data include carbon dioxide and methane concentrations and a measure of the ratio of oxygen isotope 18 to oxygen isotope 16 (called \u201cd   18<\/sup>O\u201d and pronounced “dell O 18”). These data come from the Greenland GISP2 and the Antarctic Byrd ice core; atmospheric CH  4<\/sub> and CO  2<\/sub> records are from the Byrd ice core. The data are contained in 
    data_file_paleoclimate_assignment.xls.
    • General guidance for graphing:  Highlight just the numbers in columns A and B to generate the first scatterplot. Then right click in the scatterplot and click select data, click the plus button under legend series to add a new data series, type the name of the next climate variable, click and drag data in column D for the x axis, and then click and drag all data in column E to get the variable on the y axis. Click ok and repeat adding new data series for CO2 and CH4.<\/li>
    • These two videos will help with chart making in Excel (plotting multiple x-y pairs in a scatter-plot in Excel;  adding a secondary y-axis in Excel.) <\/li>
    • Alternatively, you can use this ready-made plot of the data https:\/\/people.cas.sc.edu\/carbone\/202\/assignments\/Natural_climate_change\/dO18graph.png<\/li><\/ul>Present the following in a document:
      1. Make a single graph in Excel, Numbers, or any other graphics program that plots all four climate records versus age for the period from 10,000 to 90,000 years before present (the CO  2<\/sub> data only covers ~20,000 \u2013 90,000 ka). On the figure. label the Last Glacial Maximum (LGM) and the Younger Dryas (YD) periods.<\/li>
      2. Identify on the two d   18<\/sup>O graphs which times suggest warmer temperatures and which suggest colder temperatures<\/li>
      3. Insuring that the time (x-axis) is aligned, discuss differences that you see between the two d   18<\/sup>O curves.<\/li>
      4. Is the CH  4<\/sub> record more similar to the Greenland or the Antarctic temperature record?<\/li>
      5. Compare the CO  2<\/sub> and CH  4<\/sub> records. How are they different?<\/li>
      6. Calculate the rate of CO  2<\/sub> increase (DCO  2<\/sub>\/Dt) for one of the large, abrupt events. How does this compare to the rate of CO  2<\/sub> change from the pre-industrial period (1750) to present<\/li><\/ol><\/li><\/ol>\n","protected":false},"excerpt":{"rendered":"

        This assignment explores ice core data from 90,000 to 10,000 years before present. 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