A multiproxy reconstruction of Hebridean (NW Scotland) spring sea surface temperatures between AD 1805 and 2010

摘要: There is currently a deficiency of annually-resolved temperature series from the marine environment. We present multiproxy reconstruction Hebridean shelf sea (Tiree Passage; NW Scotland) spring surface temperatures (SSTs) for period AD 1805–2010. The based on growth increment series from first absolutely dated multi-centennial Glycymeris glycymeris bivalve mollusc sclerochronology coupled with previously published stable oxygen isotope data (δ18O) benthic foraminifera sampled sediment core nearby Loch Sunart. independent contain significant correlations SSTs across complementary frequency domains. low component sedimentary archive was combined mid and high components G. chronology indices to create single series. Split calibration-verification statistics (reduction error, RE, coefficient efficiency, CE, R2) indicate that record, calibrated local instrumental surface temperatures, contains precision skill at reconstructing (RE = 0.59, CE 0.26, R2 0.54). These demonstrate sclerochronologies, when proxies such as archives, can facilitate statistically robust reconstructions palaeoceanographic variability during late Holocene hydrographically-significant regions temperate system void archives. reconstructed general warming trend 0.60 ± 0.14 °C per century. Only four years in (1999, 2000, 2002 2003) exceed temperatures greater than two standard deviations higher mean SST (9.03 °C), whilst just three half 19th century (1835, 1838 1840) fall more 2σ below (6.80 °C).