HadSST3 Diagnostics

Maps of monthly data

Time Series

Global

(top) Global average sea-surface temperature anomalies from HadSST3 (relative to the 1961-1990 average). The black line is the median estimate and the coloured areas represent the successive addition of the various uncertainty components. (bottom) magnitude of individual uncertainty components. Data format. The final point often has much larger uncertainties than other points in the series because it represents the most recent, usually incomplete, year. Using a few months of data to estimate an annual average is inherently uncertain.

Hemispheric

(top) Northern hemisphere average sea-surface temperature anomalies from HadSST3 (relative to the 1961-1990 average). The black line is the median estimate and the coloured areas represent the successive addition of the various uncertainty components. (bottom) magnitude of individual uncertainty components. Data format. The final point often has much larger uncertainties than other points in the series because it represents the most recent, usually incomplete, year. Using a few months of data to estimate an annual average is inherently uncertain.

(top) Southern hemisphere average sea-surface temperature anomalies from HadSST3 (relative to the 1961-1990 average). The black line is the median estimate and the coloured areas represent the successive addition of the various uncertainty components. (bottom) magnitude of individual uncertainty components. Data format. The final point often has much larger uncertainties than other points in the series because it represents the most recent, usually incomplete, year. Using a few months of data to estimate an annual average is inherently uncertain.

Regional

(top) Tropical average (20°S-20°N) sea-surface temperature anomalies from HadSST3 (relative to the 1961-1990 average). The black line is the median estimate and the coloured areas represent the successive addition of the various uncertainty components. (bottom) magnitude of individual uncertainty components. Data format. The final point often has much larger uncertainties than other points in the series because it represents the most recent, usually incomplete, year. Using a few months of data to estimate an annual average is inherently uncertain.

Numbers of Observations

Each of the three panels shows numbers of observations from all sources that pass quality control summed over the globe (black) and for the northern (orange) and southern (blue) hemispheres separately. The time axis is split across three different epochs so that changes int the numbers of observations can be clearly seen at all times.

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