Daily global temperature anomaly estimates from Climate Forecast System Reanalysis (CFSR) output based on the Global Forecast System (GFS) initialization measurements four times each day are provided by the University of Maine (UM) Climate Change Institute (CCI). These estimates are graphed below and should be updated on most days by 1200 UTC. These graphs display final UM CCI CFSR daily estimates through 2017 December 31, with preliminary UM CCI GFS based daily estimates beginning 2018 January 1. The first graph shows both the final CFSR and preliminary GFS global estimates for comparison.
For January 2018, the preliminary UM CCI GFS global mean surface temperature was 0.10C higher than the CFSR estimate reported by WeatherBELL when shifted to the same reference baseline. For February, the preliminary UM CCI average was 0.09C higher than the WeatherBELL average, and for March so far 0.10C higher.
The next graph shows daily zonal temperature anomalies, where “NH” is Northern Hemisphere (0-90N) and “SH” is Southern Hemisphere (0-90S). The Tropics zone (30N-30S) covers about 50 percent of the global surface area centered on the equator, whereas the NH and SH each cover 50 percent of the global surface and average together to equal the Global average. The Tropics zone overlaps half of the NH and half of the SH but covers the same amount of surface area as each hemisphere. The Arctic (60N-90N) and Antarctic (60S-90S) zones each cover only about 7 percent of the global surface area but sometimes excerpt a much greater influence on the global average because of very large temperature anomalies compared to other zones.
The graph below provides a closer look at the NH and SH temperature anomaly trends this year so far and includes Global and Tropics as well for comparison.
For a sneak preview of how the global and hemispheric temperature anomalies are likely to trend over the next week, see the link below:
The daily global temperature anomaly estimates from CFSR output provided by UM CCI since 2014 are graphed below for a longer perspective, along with a centered running mean to show the smoothed trend.
Hemispheric and tropics zone surface temperature anomalies since 2013 are shown below, along with the global mean.
Arctic and Antarctic zonal temperature anomalies since 2013 are shown in the graph below, along with the NH, SH, and Global temperature anomalies.
For longer time periods, see the Monthly Trends page, accessible in the menu bar at the top of this page.
The latest UM CCI GFS based current weather maps can be seen here:
Today’s Weather Maps
GFS/CFSR Data Source: UM CCI Climate Reanalyzer
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