You either dont know what this plot is about or are trying to...

  1. 23,044 Posts.
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    You either dont know what this plot is about or are trying to mislead by suggesting something is represented here when it isnt.


    This Plot is from

    http://www.climate4you.com/

    in the section titled

    Temporalstability of global air temperature estimates

     The Intro of that section follows :

    "It is interesting to compare the various global air temperature estimates as to their internal degree of stability for the whole temperature record as such.Especially for surface air temperature estimates, a certain degree of changeover time affecting especially the last few months is to be expected, as additional station data may be reported and incorporated in the database. But for the older part of the temperature record numerical stability over time would be expected, provided that the mathematical procedure used for estimating the global temperature is considered mature by the research team preparing the data series considered. In this context, maturity would imply that, for example, the November 1985 temperature reported by a certain database in February 2009 would be identical to the November 1985 value reported previously by the same database.

    Below a series of diagrams is shown to illustrate the degree of maturity, calculated for various databases by plotting the net change in their global temperature record since May 2008 (or February 2009). May 2008 (or February 2008) has been chosen as start date for this test as this represents the oldest version of the individual temperature records available to the webmaster. All diagrams below are using the same temperature scale, to enable easy visual comparison. A fine study of temporal instability can be inspected here(in Norwegian)."


    In particular under the GISS chart is this text :


    Maturity diagram showing net change since 17 May 2008 in the global monthly surface air temperature record prepared by the GoddardInstitute for Space Studies (GISS), at Columbia University, NewYork City, USA. This temperature estimate extends back to January 1880. Clickhere to see a graph showing the most recent version of the GISS global temperature estimate. The net effects of the adjustments made since May 2008 are to generate a more smoothly increasing global temperature since 1880. Discussions on the background for thelack of temporal stability for the GISS temperature record can be read here,here and here. Arrows indicate two months where the adjustments over time are illustrated in thefigure below. Last diagram update 18December 2018.

    • Clickhere to download the most recent version of the GISS global monthly surface air temperature anomalies since1880.

    • Click here to download the May 2008 version of the GISS global monthly surface air temperature anomalies since 1880.

    • Click here to see a fine study of GISS temporal instability (in Norwegian).

    • Click herefor explanation of temporal stability.

     

    My opening remarks stand.



    Last edited by tinnitus: 15/01/19
 
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