Comparing <a href="https://en.wikipedia.org/wiki/Warming_stripes" class="extiw" title="w:Warming stripes">w:Warming stripes</a> derived from two different datasets (HadCRUT 4.6.0.0 and Berkeley Earth) each having a reference period 1961-1990 whose average temperature determines boundary between blue and red. Each hue covers a temperature range of 0.1 degrees Celsius. Overall date range is 1850-2018. Data is for globe (not a locality).
<p>The HadCRUT dataset publication specified the 1961-1990 reference period, so no changes were necessary.  The source data for the HadCRUT graphic is provided on the Wikimedia page of its graphic, which is provided below.
</p><p>I started with the Berkeley Earth dataset that was published with a 1951-1980 reference period, and subtracted the difference between the average temperatures of the two time periods, to arrive at a dataset having a resulting reference period of 1961-1990. Following is the dataset I derived from the original Berkeley Earth dataset as described above:
</p><p><i>General notes:</i>
</p>
<ul><li><i>Credit for general concept of <a href="https://en.wikipedia.org/wiki/warming_stripes" class="extiw" title="w:warming stripes">w:warming stripes</a>:</i> climate scientist Ed Hawkins, <a href="https://en.wikipedia.org/wiki/University_of_Reading" class="extiw" title="w:University of Reading">w:University of Reading</a>, U.K.</li>
<li>Data values are visualized using color rather than locations of points on a graph.</li>
<li>The average temperature in reference period 1961-1990 determines boundary between blue and red.</li>
<li>Horizontal scale is time, from 1850 (left) to 2018 (right).</li>
<li>Each hue (up to 8 blue and 8 red) covers a temperature range of 0.1 degrees Celsius.</li>
<li>Data is global (not for a locality).</li>
<li>A thin purple horizontal bar (purposely designed to be visually discreet) shows the reference period for the diagrams</li></ul><div style="margin-left:0">
<table class="mw-collapsible mw-collapsed" style="background: transparent; text-align: left; border: 1px solid Silver; margin: 0.2em auto auto; width:100%; clear: both; padding: 1px;"><tbody><tr><th style="background: #CFC; font-size:87%; padding:0.2em 0.3em; text-align:center;"><span style="font-size:115%">Click at right to show/hide ACTUAL DATA </span>
</th></tr><tr><td style="border: solid 1px Silver; padding: 0.6em; background: White;">
<p><u>Year</u>	<u>Anomaly w/ 1961-1990 Ref period (Berkeley Earth, globe)</u><br>
1850	-0.5598	<br>
1851	-0.4428	<br>
1852	-0.4258	<br>
1853	-0.4533	<br>
1854	-0.4033	<br>
1855	-0.3703	<br>
1856	-0.5183	<br>
1857	-0.6478	<br>
1858	-0.5058	<br>
1859	-0.4478	<br>
1860	-0.5103	<br>
1861	-0.6063	<br>
1862	-0.6773	<br>
1863	-0.4563	<br>
1864	-0.4818	<br>
1865	-0.3818	<br>
1866	-0.3233	<br>
1867	-0.3118	<br>
1868	-0.2888	<br>
1869	-0.3193	<br>
1870	-0.3888	<br>
1871	-0.4088	<br>
1872	-0.3873	<br>
1873	-0.3513	<br>
1874	-0.4333	<br>
1875	-0.4608	<br>
1876	-0.4638	<br>
1877	-0.0888	<br>
1878	-0.0023	<br>
1879	-0.3238	<br>
1880	-0.3823	<br>
1881	-0.2888	<br>
1882	-0.3338	<br>
1883	-0.3968	<br>
1884	-0.5413	<br>
1885	-0.5218	<br>
1886	-0.5508	<br>
1887	-0.5673	<br>
1888	-0.3838	<br>
1889	-0.2638	<br>
1890	-0.5363	<br>
1891	-0.4348	<br>
1892	-0.4783	<br>
1893	-0.4653	<br>
1894	-0.4518	<br>
1895	-0.3948	<br>
1896	-0.2923	<br>
1897	-0.2898	<br>
1898	-0.4798	<br>
1899	-0.3173	<br>
1900	-0.2133	<br>
1901	-0.2848	<br>
1902	-0.4128	<br>
1903	-0.5213	<br>
1904	-0.5623	<br>
1905	-0.4038	<br>
1906	-0.3293	<br>
1907	-0.4933	<br>
1908	-0.5228	<br>
1909	-0.5738	<br>
1910	-0.5483	<br>
1911	-0.5788	<br>
1912	-0.4953	<br>
1913	-0.4553	<br>
1914	-0.2858	<br>
1915	-0.2228	<br>
1916	-0.4608	<br>
1917	-0.5668	<br>
1918	-0.4123	<br>
1919	-0.3473	<br>
1920	-0.3323	<br>
1921	-0.2613	<br>
1922	-0.3538	<br>
1923	-0.3368	<br>
1924	-0.3283	<br>
1925	-0.2828	<br>
1926	-0.1353	<br>
1927	-0.2548	<br>
1928	-0.2368	<br>
1929	-0.4158	<br>
1930	-0.2073	<br>
1931	-0.1483	<br>
1932	-0.1843	<br>
1933	-0.3658	<br>
1934	-0.2313	<br>
1935	-0.2668	<br>
1936	-0.2163	<br>
1937	-0.0633	<br>
1938	-0.0623	<br>
1939	-0.0718	<br>
1940	0.0077	<br>
1941	0.0057	<br>
1942	-0.0423	<br>
1943	-0.0128	<br>
1944	0.0837	<br>
1945	-0.0443	<br>
1946	-0.1103	<br>
1947	-0.0348	<br>
1948	-0.1203	<br>
1949	-0.1523	<br>
1950	-0.2278	<br>
1951	-0.0553	<br>
1952	0.0057	<br>
1953	0.0647	<br>
1954	-0.1238	<br>
1955	-0.1748	<br>
1956	-0.2438	<br>
1957	0.0092	<br>
1958	0.0142	<br>
1959	-0.0188	<br>
1960	-0.0658	<br>
1961	0.0197	<br>
1962	-0.0353	<br>
1963	0.0107	<br>
1964	-0.2513	<br>
1965	-0.1618	<br>
1966	-0.0933	<br>
1967	-0.0578	<br>
1968	-0.1073	<br>
1969	0.0297	<br>
1970	-0.0278	<br>
1971	-0.1563	<br>
1972	-0.0658	<br>
1973	0.0507	<br>
1974	-0.1788	<br>
1975	-0.1163	<br>
1976	-0.2213	<br>
1977	0.0667	<br>
1978	-0.0533	<br>
1979	0.0432	<br>
1980	0.1457	<br>
1981	0.1812	<br>
1982	-0.0123	<br>
1983	0.1732	<br>
1984	0.0012	<br>
1985	-0.0068	<br>
1986	0.0407	<br>
1987	0.1767	<br>
1988	0.2157	<br>
1989	0.1007	<br>
1990	0.2902	<br>
1991	0.2677	<br>
1992	0.1007	<br>
1993	0.1237	<br>
1994	0.1852	<br>
1995	0.3082	<br>
1996	0.2012	<br>
1997	0.3667	<br>
1998	0.5027	<br>
1999	0.2722	<br>
2000	0.2837	<br>
2001	0.4332	<br>
2002	0.5022	<br>
2003	0.4932	<br>
2004	0.4092	<br>
2005	0.5602	<br>
2006	0.5037	<br>
2007	0.5167	<br>
2008	0.3992	<br>
2009	0.5197	<br>
2010	0.5847	<br>
2011	0.4652	<br>
2012	0.4872	<br>
2013	0.5282	<br>
2014	0.5852	<br>
2015	0.7277	<br>
2016	0.8357	<br>
2017	0.7287	<br>
2018	0.6622
</p>
</td></tr></tbody></table></div>
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