Global land-ocean temperature trends,1880-2015.The graph shows change in global surface temperatures relative to the 1951-1980 global average.The gray bars represent uncertainty in the measurements.Note the inclusion of both annual average temperature anomalies and 5-year mean temperature anomalies;together,they give a sense of overall trends.[Based on data from NASA/GISS;available at http:// climate.nasa.gov/vital-signs/global-temperature/.]

Since 1880,global land-ocean temperatures have shown

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The graph clearly shows a steady increase in global surface temperatures since 1880, indicating a warming trend. The inclusion of 5-year mean temperature anomalies also shows that this trend has been consistent and not just due to short-term fluctuations. The gray bars indicating uncertainty in the measurements further confirm the overall warming trend.

Global Land-Ocean Temperature Trends,1880-2015