(Update 4 Oct) After additional analysis of the September data products, we are able to report that the original values as published are acceptable and will not change. The concern was raised as we saw a spike in lower tropospheric temperatures and (more importantly) record cold stratospheric temperatures. After examination of the independent output of two satellites, both providing the same values, we are confident the data are credible. See the story here
at Roy Spencer’s blog describing a record sudden stratospheric warming over Antarctica.