All time daily record highs year count 1936 10011 1934 9704 1939 7743 1931 7424 1930 6862 1933 6808 1953 6589 1925 6567 1954 6338 1911 6206Claims that we are seeing record numbers of record highs are completely false. People making them are either incompetent or dishonest.
http://cdiac.ornl.gov/ftp/ushcn_daily/us.txt.gz
Northern Hemisphere temperature patterns in the last 12 centuries
1Department of History, Stockholm University, 10691 Stockholm, Sweden
2Centre for Medieval Studies, Stockholm University, 10691 Stockholm, Sweden
3Bert Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden
4Department of Physical Geography and Quaternary Geology, Stockholm University, 10691 Stockholm, Sweden
5Department of Mathematics, Stockholm University, 10691 Stockholm, Sweden
Abstract. We analyse the spatio-temporal patterns of temperature variability over Northern Hemisphere land areas, on centennial time-scales, for the last 12 centuries using an unprecedentedly large network of temperature-sensitive proxy records. Geographically widespread positive temperature anomalies are observed from the 9th to 11th centuries, similar in extent and magnitude to the 20th century mean. A dominance of widespread negative anomalies is observed from the 16th to 18th centuries. Though we find the amplitude and spatial extent of the 20th century warming is within the range of natural variability over the last 12 centuries, we also find that the rate of warming from the 19th to the 20th century is unprecedented in the context of the last 1200 yr. The positive Northern Hemisphere temperature change from the 19th to the 20th century is clearly the largest between any two consecutive centuries in the past 12 centuries. These results remain robust even after removing a significant number of proxies in various tests of robustness showing that the choice of proxies has no particular influence on the overall conclusions of this study.
Global Warming Science Facts: Medieval Warming Exceeds Modern Warming, Per New Research Using 120 Proxies
Those inconvenient global warming science facts that climate doomsday pundits hate - another major study determines Medieval Warming hotter than Modern Warming
(click on image to enlarge, source)Latest peer reviewed research from Ljungqvist et al. confirms both - see adjacent chart.
"...authors
write that "a number of Northern Hemispheric (NH) temperature
reconstructions covering the last 1-2 millennia, using
temperature-sensitive proxy data, have been made to place the observed
20th century warming into a long-term perspective."..."retrieved from a
wide range of archives including, but not limited to, ice-cores, pollen,
marine sediments, lake sediments, tree-rings, speleothems and
historical documentary data."..."they present a list of antecedent
analyses where the number of proxy records used ranged from only 3 to 46
(compared to their 120), and where the number of records with annual
resolution ranged from only 3 to 30, whereas their study included 49
such annual-resolution records"...And they say that "these studies
generally agree on the occurrence of warmer conditions ca. 800-1300 AD
and colder conditions ca. 1300-1900 AD, followed by a strong warming
trend in the 20th century,"..."scientists report that "during the 9th to
11th centuries there was widespread NH warmth comparable in both
geographic extent and level to that of the 20th century,"" [F. C. Ljungqvist, P. J. Krusic, G. Brattström, H. S. Sundqvist 2012: Climate of The Past]
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