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But is it an apples to apples comparison. In other words, what are the difficulties when splicing current temps to that graph?
The brief record surface melt in July 2012, which extended over the traditional dry snow facies, including Summit, was unprecedented during the satellite era [Nghiem et al., 2012]. Prior to this event, the most recent melt event at Summit occurred in 1889, which was one of only eight such events to have occurred in the past ~1500 years [Clausenet al., 1988; Meese et al., 1994]. Summit melt frequency has varied throughout the Holocene, ranging from once per ~82 years from 5500 to 8500 BP, to once per ~250 years from 1000 to 4000 BP [Alley and Anandakrishnan, 1995].
The current decadal average surface temperature (2001–2010) at the GISP2 site is −29.9°C.
 To place the Greenland temperature proxy reconstruction into a historical context, we incorporate two additional Summit temperature records. One record is obtained from a compilation of Summit Automatic Weather Station ∼2 m surface air temperature (SAT) observations (hereafter AWS or in-situ record) that spans 23 years (1987–2010). The AWS were situated within 20 km of the GISP 2 coring site and within 25 m elevation of the ice sheet topographical summit (Figure 1, top, red line). The series begins in May 1987 with Automatic Weather Station data after Stearns and Weidner . Shuman et al.  merge this record with data from the Greenland Climate Network (GC-Net) AWS data [Steffen and Box, 2001] to produce the first 12 years of this compilation. Gaps before June 1996 are in-filled using daily passive microwave emission brightness temperatures. GC-Net data then comprise the period spanning June 1996 to December 2003 with gaps in-filled by Danish Meteorological Institute (DMI) Summit AWS data [Vaarby-Laursen, 2010]. The DMI data exclusively form this data series from January 2004 through December 2010.
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