On Misleading Comparisons between the Danish Meteorological
Institute (DMI) Arctic Air Temperatures and the Goddard
Institute of Space Science (GISS) Arctic Surface Temperature
Anomalies, and Implications for Arctic Warming. A recent WUWT
article by Frank Lansner, August 5th 2010 has the heading “DMI
polar data shows cooler Arctic temperature since 1958”. Peter
Berenyi also posted a similar chart here on Skeptical Science.
Frank Lansnser goes on to show data from GISS July polar views
(where individual grid cells show large variability) and
compares this with graphics of DMI data for July 2010 to cast
doubt on the validity of the GISS gridded values in the polar
regions. This follows on from similar points made by Steve
Goddard, on WUWT and another article by Harold Ambler which
tries to show how DMI is based on more data measurements than
GISS, followed by questions and implications about the
reliability of GISS gridded values in the Arctic region. Similar
claims that the DMI data shows Arctic “cooling” or h