Climatic Data - Climate Change: Identification and Projections - page 15

relatively representative collection of the variety of existing reconstructions:
Moberg (2007), Ljungqvist (2009), Loehle (2007), Jones & Mann (2004).
Figure 2.2. Eleven low frequency proxies
When the AR5 was released at the end of 2013, among the 15
paleotemperatures shown in Figure 5.7 of the AR5, the first three from the
above list were featured. The Jones and Mann data is missing. However,
there are four more recent reconstructions from M. Mann, as well as a
reconstruction from Christiansen and Ljungqvist [CHR 12], which we
disregarded due to problems matching its data with historical measurements.
Despite its absence from the AR5 catalogue, the Jones and Mann data
[JON 04] will be retained because of its closeness to the hockey stick graph
[MAN 99], which we would have kept for its “historic” interest had it not
been limited to the second millennium.
In any case, this was the choice that we made, dictated to some extent by
chance and circumstances, and we believe that it gives a relatively
representative depiction of the variety of reconstructions available.