The October TempLS mesh index dropped a little from 0.721°C in September to 0.679°C in October. This establishes a new record in recent times - it is the first month since April 2015 that has not been the hottest of that month in the whole record. October 2015 was the first really warm month of the El Nino. Canada and Mexico were late reporting this month, so I waited for that.
The TempLS grid index showed a greater drop, from 0.734°C to 0.617°C. As usual, this reflects disparity in polar conditions, which remained relatively warm with more cooling elsewhere. Indices like HADCRUT and NOAA may follow this trend. The modest fall in TempLS mesh was very similar to the NCEP/NCAR index, and also UAH lower troposphere.
The main map features are a cool band across Siberia, and warmth in the USA.
Other interesting things are happening. November in the NCEP/NCAR index has been exceptionally warm, up about 0.22°C on October at this early stage. Arctic warmth is reflected in the Arctic sea ice, which I mentioned in the NCEP/NCAR post. That remains below other years, but will eventually freeze. The Antarctic ice has been exceptionally low since mid October, which may be more significant, since the melting season is starting from that low base. Here is a section of the SH radial plot:
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