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Indian Ocean corals reveal crucial role of World War II bias for twentieth century warming estimates

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dc.contributor Sch Geog Archaeol & Environm Studies
dc.contributor Helmholtz Association
dc.contributor Free University Of Berlin
dc.contributor Sect Palaeontol
dc.contributor Rwth Aachen University
dc.contributor Steinmann Inst
dc.contributor Univ Kiel
dc.contributor Geol Inst
dc.contributor Free Univ Berlin
dc.contributor Rhein Westfal Th Aachen
dc.contributor Dept Environm & Agr
dc.contributor Curtin University
dc.contributor University Of Kiel
dc.contributor Univ Bonn
dc.contributor Inst Geosci
dc.contributor Univ Witwatersrand
dc.contributor Geomar Helmholtz Ctr Ocean Res
dc.contributor Australian Inst Marine Sci
dc.contributor University Of Bonn
dc.contributor University Of Witwatersrand
dc.contributor Curtin Univ Technol
dc.contributor Geomar Helmholtz Center For Ocean Research Kiel
dc.contributor Australian Institute Of Marine Science WEBER, M. E. ZINKE, J. LATIF, M. PFEIFFER, M. DULLO, W. -C. GARBE-SCHOENBERG, D. 2017-11-19T19:02:46Z 2017-11-19T19:02:46Z 2019-07-08T02:11:15Z 2017-11-19T19:02:46Z 2017-11-19T19:02:46Z 2019-07-08T02:11:15Z 2017-10-31
dc.identifier.citation Pfeiffer M, Zinke J, Dullo WC, Garbe-Schonberg D, Latif M, Weber ME (2017) Indian Ocean corals reveal crucial role of World War II bias for twentieth century warming estimates. Scientific Reports 7: 14434
dc.identifier.issn 2045-2322
dc.description.abstract The western Indian Ocean has been warming faster than any other tropical ocean during the 20th century, and is the largest contributor to the global mean sea surface temperature (SST) rise. However, the temporal pattern of Indian Ocean warming is poorly constrained and depends on the historical SST product. As all SST products are derived from the International Comprehensive Ocean-Atmosphere dataset (ICOADS), it is challenging to evaluate which product is superior. Here, we present a new, independent SST reconstruction from a set of Porites coral geochemical records from the western Indian Ocean. Our coral reconstruction shows that the World War II bias in the historical sea surface temperature record is the main reason for the differences between the SST products, and affects western Indian Ocean and global mean temperature trends. The 20th century Indian Ocean warming pattern portrayed by the corals is consistent with the SST product from the Hadley Centre (HadSST3), and suggests that the latter should be used in climate studies that include Indian Ocean SSTs. Our data shows that multi-core coral temperature reconstructions help to evaluate the SST products. Proxy records can provide estimates of 20th century SST that are truly independent from the ICOADS data base.
dc.description.sponsorship We thank the members of the TESTREEF program and the 1996 'Friends of the Chagos' expedition for assisting with drilling the coral cores. John Kennedy provided the HadSST3 data and its error estimates for the Western Indian Ocean region. Karin Kiessling helped with Sr/Ca analysis. Funding: This study was funded by the DFG (PF 676/1-1 and PF 676 2-1).
dc.language English
dc.subject Sea-surface Temperature
dc.subject In-situ
dc.subject Science & Technology - Other Topics
dc.subject Multidisciplinary Sciences
dc.subject Climate
dc.subject Variability
dc.subject Reconstructions
dc.subject Period
dc.subject Sr/ca
dc.subject Asian Monsoon
dc.subject Chagos Archipelago
dc.subject Records
dc.title Indian Ocean corals reveal crucial role of World War II bias for twentieth century warming estimates
dc.type journal article
dc.identifier.doi 10.1038/s41598-017-14352-6
dc.identifier.wos WOS:000414231000035

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