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How To Access GISS Temperature Records

February 1, 2015

By Paul Homewood


It’s a while since I explained how we can track temperature adjustments on the GISS system, so here is a bit of a refresher.


Below is the screenshot of the GISS opening menu.




1) Note near the bottom is a drop down box marked “Data Set”. This gives three options:


GHCN V3 Adj 

After removing suspicious

After GISS homogeneity adjustment.


The GISS homogeneity adjustment is their attempt to allow for UHI, but the one we are interested in, for comparing with raw data, is the first one, GHCN V3 Adj.


2) After selecting this, you can select a site, either by clicking on the map or by entering a name (or [part of a name).


3) Click on the station you want, and this brings up the graph. At the bottom, you can click on monthly data as text, to access the actual temperatures.


4) Raw data used to be available on GISS up to Nov 2011, via GHCN V2. This can still be seen by clicking on “GHCN Version 2”, in the middle of the menu (the original menu screen shown at the top). This brings up a similar screen, with three options: 


Raw GHCN data

After combining sources

After cleaning/homogeneity adjustment


I usually use the “after combining” option.

  1. February 1, 2015 2:45 pm

    Is there any way to get old copies of the monthly LOTI data?

    • February 1, 2015 4:57 pm

      According to Steve Goddard, they don’t archive them.

      I did get this 2008 version from Climate4you

      • February 1, 2015 5:18 pm

        Thanks that makes 31 that I have now from 1998 to the present (most of them are the last few years). I have all the values keyed into a spreadsheet and you can find interesting patterns. I had more hard copies but somehow the file got lost and I’m trying to recreate it.

  2. Retired Dave permalink
    February 1, 2015 3:56 pm

    Thank you Paul – very interesting.

  3. February 1, 2015 4:39 pm


  4. February 1, 2015 8:06 pm

    I’m good until I get to step 4. “Click in the middle of the menu”. What menu? Once you have executed step 3 and have a table of data, there is no menu.

  5. Ian G permalink
    February 1, 2015 9:51 pm

    I use the archive
    to check ‘raw’ temps. Not sure if it is the same site as you get, Paul. GISS archived this site a couple of years ago.
    I wonder how long you will be able to access this temp series?

  6. John W permalink
    February 4, 2015 1:14 am

    (Novice here. Fair warning)

    I’m wrestling with the Data on the Delingpole article. His first example is Puerto Casado, and he gives links to the GISS source. but the IDs are different.

    So as I drill through the GISS data… I first go to GHCN v2
    3 data set are offered:

    Raw GHCN data + USHCN corrections (ds=0)
    after combining sources at the same location (ds=1)
    after cleaning/homogeneity adjustment (ds=2)

    The first 2 data set come in 5 flavors, that is, IDs raging from 308860860000 to 308860860004
    The last is ONLY available for ID 308860860004

    Heading back to GHCN_v3 9the main page), we find 3 data sets, but ONLY for ID 308860860000

    GHCN v3 (adj) + SCA data (ds=12)
    after removing suspicious records (ds=13)
    after GISS homogeniety adjustment (ds=14)

    ID 308860860000 in GHCN v2 is described as Years 1951-1991
    ID 308860860000 in GHCN v3 is described as Years 1951-2014

    2.5 questions:

    1) What the HECK is this mishmash, and what is it providing?
    1.5) what is an “ID”? Dataset seems more self evident.
    2) Is Delingpole comparing apples an oranges?

    His 2 graphs are:
    a) data from 1987-2011, after combining sources at the same location(“purportedly raw data”)
    b) data from 1951-2014, after GISS homogeniety adjustment (“the graph raising the alarm)

    Looking further, data set 13 suggests that is is GHCN v3 raw data with anomolies removed, but it’s wildly different from the corresponding v2 dataset.

    • February 4, 2015 11:11 am

      1) Version 2 – Sometimes stations have more than one record, thus are given a different ID (just the suffix). These are combined (after combining sources at the same location), and it is this option that all my graphs are based on, as this is also what GISS/GHCN were using up to 2011.

      2) Version 3 – My graphs are all based on “GHCN V3 Adj”. The GISS Homogeneity Adj is what GISS allow for UHI. (As this is only done at urban sites, you won’t notice any difference with Puert Casado, which is rural.

      Fuller explanation here!


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