Title: Atlantic core-top calibration of the U37K index as a sea-surface palaeotemperature indicator
Abstract: A field calibration of the UK index with sea surface temperature is discussed, through analysis of an extensive suite of surface sediments (n = 109) from the northeastern Atlantic (2°S–75°N). Values of U37K are compared with sea surface temperatures for overlying waters measured at different depths and seasons, to obtain a correlation suitable for palaeotemperature reconstructions. The best fit is obtained using surface (0 m) temperatures corresponding to caloric winter and autumn months. However, the annual average, spring and summer surface temperature equations also have high correlation coefficients, and are also appropriate for climatic studies. The results further validate the general applicability of the U37K as a climatic proxy, because the calibration equations are valid over a wide range of surface water temperatures (0–28°C) for different algal populations and are representative of the average contribution of alkenones to sediments, as found in sediment cores.
Publication Year: 1995
Publication Date: 1995-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 167
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