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Global and Regional Trends In The Reprocessed (A)ATSR Sea-Surface Temperature Record.

Karen Veal(1), Gary Corlett(1), David Llewellyn-Jones(1) and John Remedios(1)

(1) University of Leicester, University Road, LE1 7RH, United Kingdom


Sea Surface Temperature (SST) is widely recognised to be an important indicator of global change, with the ability to reflect significant climate trends. The detection of such trends requires rigorous measurements that are global, accurate and consistent. Space instruments can provide the means to achieve these required attributes in SST data.

This paper will present an analysis of long-term sea-surface temperature (SST) data sets. The analysis takes advantage of the version 2 (A)ATSR reprocessed data set that runs from 1991 to the present. This data set is compared with the AVHRR Pathfinder V5.0 and other long-term data sets such as HadISST V1.1 and Reynolds SST V2.0.

The time series is examined for the strong influence on natural variability of such processes as the seasonal cycle and El Nino, and residual global and regional trends are identified. The analysis reveals a trend of increasing global temperature between 0.13 °C to 0.18 °C, per decade, closely matching that expected due to current levels of greenhouse gas exchange.

The methodology demonstrated here can be applied to other data-sets, which cover long time-series observations of geophysical observations in order to characterize long-term change.


Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry