HADCRUT4 – Largest One Month Rise in Temperature Anomaly Was in 1862/1863

Using HADCRUT4 monthly anomalies, I noticed the largest one month rise in temperature anomaly was in December 1862 to January 1863.

The anomaly rose from -0.822C to +0.147.

A change of .969C. Before CO2.

HADCRUT4 Global 1860 to 1864

HADCRUT4 versus HADCRUT4 Global

HADCRUT4 is now at its 3rd iteration. It started with version and then version come out. As of the latest data it is at

I thought I would compare them. Here is the difference between them ( monthly anomaly minus monthly anomaly).

If the bar is red, the newest HADCRUT4 is warmer. If blue, then the newest data is cooler.

This is the data from 1950 on. Note that the values are pretty low and relatively evenly divided between blue and red.

Until 1997. Then the values are a little larger (still relatively small).  And almost all red.

They are warming the most recent temperatures again! Give them a few years and the pause will disappear.

Click to make bigger.

HADCRUT4 minus HADCRUT4 Global


HADCRUT4 March 2013 – Cooling at -0.292C / Decade for last 4 years

HADCRUT4 March 2013 data is finally available. Remember that the anomaly is the difference from the 1961-1990 average.

The global data shows cooling at -0.292C / Decade for last 4 years. (Click to make bigger)

Last Data as of Mar 2013 - Last 4 Years - HADCRUT4 Global

For those who think 4 years is too short, the global data shows cooling at -0.034C / Decade for last 12 years.

Last Data as of Mar 2013 - Last 12 Years - HADCRUT4 Global

Where is the Data? UAH, HADCRUT kind of late

2nd UPDATE: UAH is out. My post here.I knew if I complained it would all show up. 🙂

UPDATE: HADCRUT4 for March 2013 is out. My post is here.

Anyone know where the UAH and HADCRUT data is?

While some of the UAH data arrived a few days ago, the downloadable file is still missing April’s data. March’s data arrived April 2.

HADCRUT is usually available by the 28th of the following month. February’s data came out March 28. It is now 10 days late.

Are they having a conference? March and April too cold to explain?

RSS is out. HADCET is out. NCDC is due soon, but not overdue.

HADCRUT4 1930 to 1949 by Month – Dangerous pre-CO2 Global Warming

HADCRUT4 1930 to 1949 by Month.

Normally you see this part of the graph with 2 or 3 red ticks because it is done annually.

Keep in mind the highest red tick is an anomaly of 0.355C for August 1945. The anomaly for August 2012 was 0.532C. Which is only 0.177C warmer. (Corrected)

Click to see bigger.

HADCRUT4 1930 to 1949

HADCRUT4 Gridded Feb 2013 – Europe was COLDER than 1961-1990!!!

Using HADCRUT4 Gridded data for Feb 2013 , I thought it would be useful to map the 5×5 grid squares colder than 1961-1990.

For some strange reason HADCRUT4 uses the archaic 1961-1990 period as the baseline, rather than the accepted 1981-2010.

Please click on the maps to make them bigger. And make sure you get them to go full size. I made them pretty big (3200 x 2000 pixels).

The number in the boxes is the temperature difference between the 1961-90 average and Feb 2013.

Notice that most of Western Europe was colder than 1961-1990!!!!!!!

Why only the cold squares? Because the HADCRUT4 page colr choices tends to minimize the cold areas. And because I can.


HADCRUT4 – Gridded 12 Year Trends – Freezing In Alaska and Mongolia and Australia

HADCRUT4 for the last 12 years shows a small amount of cooling. The following map shows which 5×5 grid squares are warming or cooling. I am using grid squares with 130 out of 144 possible datapoints for the period. The circles are proportional to the trends.  Keep in mind that this is 5×5 grids squares. As I’ve shown for Canada different size of grid squares change warming to cooling.


HADCRUT4 Dec 2012 – Colder than 3 months in 1878 (and others)

HADCRUT4 for Dec 2012 is out. The anomaly was .269C.

I looked at HADCRUT3 in a previous post.

Here is a list of months with a warmer anomaly than Dec 2012 that came before 1990.

year month Anomaly
1878 2 0.395
1878 3 0.348
1878 4 0.334
1944 1 0.29
1944 9 0.295
1945 8 0.355
1958 1 0.277
1973 2 0.269
1979 12 0.357
1981 1 0.333
1981 12 0.269
1983 1 0.431
1983 2 0.313
1987 2 0.284
1987 12 0.316
1988 1 0.385
1988 3 0.275