I am trying to figure out part a, maybe then I can do b. Thanks (5)…

I am trying to figure out part a, maybe then I can do b.
(5) The annual mean atmospheric CO2 concentrations measured at Mauna Loa Observatory (MLO) in Hawaii from March 1958 through April 1974 have been obtained by C. David Keeling of the Scripps Institution of Oceanography (SIO). a. The following table list the CO2 concentration of the past 22 year from 1998 to 2019. Please compute the 20-year mean CO2 concentration (e.g., 1998-2017). Then compute and plot the CO2 concentration anomalies time series. [20pts] b. Read “IPCC_2013_Report_AR5” report in Blackboard/reading folder) and explain the reason of the increasing CO2 concentration in the atmosphere? Please cite the corresponding paragraph. [10pts] Year 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 CO2 (ppm) Anomalies(ppm) 366.7 368.38 369.55 371.14 373.28 375.8 377.52 379.8 381.9 383.79 385.6 387.43 389.9 391.65 393.85 396.52 398.65 400.83 404.24 406.55 408.52 411.44

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