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  • 1
    Online Resource
    Online Resource
    Auswertung von Korallendaten zur Untersuchung der klimatischen Verhältnisse im tropischen Atlantik (2005)
    Kiel
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (48 Seiten = 5 MB) , Illustrationen, Graphen, Karten
    Edition: 2021
    URL: https://oceanrep.geomar.de/7950/
    Language: German
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  • 2
    Online Resource
    Online Resource
    Improving SST reconstructions from coral Sr/Ca records : multiple corals from Tahiti (French Polynesia) (2008)
    Associated volumes
    Details Availability
    In: International journal of earth sciences, Berlin : Springer, 1999, (2008), 1437-3262
    In: year:2008
    In: extent:10
    Description / Table of Contents: We reconstruct SST from coral Sr/Ca ratios measured at three coral cores taken from the lagoon of Tahiti (French Polynesia). Two coral cores were drilled from the same coral colony (one horizontally and one vertically), and a third core was drilled vertically from another coral growing at a different site. We evaluate several Sr/Ca records as proxies for regional SST variations: (1) the three single-core records from Tahiti, (2) an average Sr/Ca record computed from the two cores drilled from the same coral colony, (3) an average Sr/Ca record computed from all three Tahiti cores, and (4) an average Sr/Ca record computed from the three Tahiti cores and a fourth core taken from a different island (Rarotonga). On a monthly scale, the average Sr/Ca record including the four coral cores from Tahiti and Rarotonga shows the best correlation with regional SST. The variance of the SST reconstruction is very realistic and the residual SST is low. This suggests that reconstructing SST from average proxy records gives a better representation of regional SST variations. Of the three Tahiti cores, the one that was drilled horizontally shows the best correlation with grid-SST on an annual mean scale. All three Tahiti corals show much larger interannual SST variations than that indicated by grid-SST.
    Type of Medium: Online Resource
    Pages: 10 , graph. Darst
    ISSN: 1437-3262
    DOI: 10.1007/s00531-008-0323-2
    Language: English
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  • 3
    Online Resource
    Online Resource
    Oceanic forcing of interannual and multidecadal climate variability in the southwestern Indian Ocean : evidence from a 160 year coral isotopic record (La Réunion, 55°E, 21°S) (2004)
    Associated volumes
    Details Availability
    In: Paleoceanography, Hoboken, NJ : Wiley, 1986, 19(2004), 1944-9186
    In: volume:19
    In: year:2004
    In: extent:14
    Type of Medium: Online Resource
    Pages: 14 , graph. Darst
    ISSN: 1944-9186
    DOI: 10.1029/2003PA000964
    Language: English
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  • 4
    Online Resource
    Online Resource
    Mayotte coral reveals hydrological changes in the western Indian Ocean between 1881 and 1994 (2009)
    Associated volumes
    Details Availability
    In: Geophysical research letters, Hoboken, NJ : Wiley, 1974, 35(2009), 1944-8007
    In: volume:35
    In: year:2009
    In: extent:5
    Type of Medium: Online Resource
    Pages: 5 , graph. Darst
    ISSN: 1944-8007
    DOI: 10.1029/2008GL035634
    Language: English
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  • 5
    Online Resource
    Online Resource
    Improving SST reconstructions from coral Sr/Ca records : multiple corals from Tahiti (French Polynesia) (2009)
    Associated volumes
    Details Availability
    In: International journal of earth sciences, Berlin : Springer, 1999, 98(2009), 1, Seite 31-40, 1437-3262
    In: volume:98
    In: year:2009
    In: number:1
    In: pages:31-40
    Description / Table of Contents: We reconstruct SST from coral Sr/Ca ratios measured at three coral cores taken from the lagoon of Tahiti (French Polynesia). Two coral cores were drilled from the same coral colony (one horizontally and one vertically), and a third core was drilled vertically from another coral growing at a different site. We evaluate several Sr/Ca records as proxies for regional SST variations: (1) the three single-core records from Tahiti, (2) an average Sr/Ca record computed from the two cores drilled from the same coral colony, (3) an average Sr/Ca record computed from all three Tahiti cores, and (4) an average Sr/Ca record computed from the three Tahiti cores and a fourth core taken from a different island (Rarotonga). On a monthly scale, the average Sr/Ca record including the four coral cores from Tahiti and Rarotonga shows the best correlation with regional SST. The variance of the SST reconstruction is very realistic and the residual SST is low. This suggests that reconstructing SST from average proxy records gives a better representation of regional SST variations. Of the three Tahiti cores, the one that was drilled horizontally shows the best correlation with grid-SST on an annual mean scale. All three Tahiti corals show much larger interannual SST variations than that indicated by grid-SST.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1437-3262
    DOI: 10.1007/s00531-008-0323-2
    Language: English
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  • 6
    Online Resource
    Online Resource
    Caribbean coral tracks Atlantic Multidecadal Oscillation and past hurricane activity (2008)
    Associated volumes
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    In: Geology, Boulder, Colo. : Soc., 1973, 36(2008), 1, Seite 11-14, 0091-7613
    In: volume:36
    In: year:2008
    In: number:1
    In: pages:11-14
    Description / Table of Contents: It is highly debated whether global warming contributed to the strong hurricane activity observed during the last decade. The crux of the recent debate is the limited length of the reliable instrumental record that exacerbates the detection of possible long-term changes in hurricane activity, which naturally exhibits strong multidecadal variations that are associated with the Atlantic Multidecadal Oscillation (AMO). The AMO, itself a major mode of climate variability, remains also poorly understood because of limited data. Here, we present the fi rst coral-based proxy record (Delta 18 O) that clearly captures multidecadal variations in the AMO and the hurricane activity. Our record, obtained from a brain coral situated in the Atlantic hurricane domain, is equally sensitive to variations in sea surface temperature (SST) and seawater Delta 18 O, with the latter being strongly linked to precipitation, by this means amplifying large-scale climate signals in coral Delta 18 O. The SST and precipitation signals in the coral provide the longest, thus far, continuous proxy-based record of hurricane activity that interestingly exhibits a long-term increase over the last century. As multidecadal SST variations in this region are closely related to the AMO, this study raises new possibilities to extend the limited observations and to gain new insights into the mechanisms underlying the AMO and long-term hurricane variations.
    Type of Medium: Online Resource
    Pages: graph. Darst., Kt
    ISSN: 0091-7613
    DOI: 10.1130/G24321A.1
    Language: English
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  • 7
    Online Resource
    Online Resource
    Patterns of Pacific decadal variability recorded by Indian Ocean corals (2009)
    Associated volumes
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    In: International journal of earth sciences, Berlin : Springer, 1999, 98(2009), 1, Seite 41-52, 1437-3262
    In: volume:98
    In: year:2009
    In: number:1
    In: pages:41-52
    Description / Table of Contents: We investigate Pacific Decadal Oscillation (PDO) signals recorded by two bimonthly resolved coral Gamma18 O series from La Réunion and Ifaty (West Madagascar), Indian Ocean from 1882 to 1993. To isolate the main PDO frequencies, we apply a band pass filter to the time series passing only periodicities from 16 to 28 years. We investigate the covariance patterns of the coral time series with sea surface temperature (SST) and sea level pressure (SLP) of the Indian and Pacific Oceans. In addition, the empirical orthogonal functions of the filtered SST and SLP fields (single and coupled) are related to the filtered coral times series. The covariance maps show the typical PDO pattern for SST and SLP, confirming the coupling between the Indian and Pacific Oceans. Both corals show the strongest signal in boreal summer. The La Réunion (Ifaty) coral better records SST (SLP) than SLP (SST) pattern variability. We suggest that the filtered La Réunion coral Gamma 18 O represents Gamma 18 O of seawater that varies with the South Equatorial Current, which, in turn, is linked with the SST PDO. The filtered Ifaty coral ?18O represents SST and is remotely linked with the SLP PDO variability. A combined coral record of the Ifaty and La Réunion boreal summer Gamma 18 O series explains about 64% of the variance of the coupled SST/SLP PDO time series.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1437-3262
    URL: http://www.springerlink.com/content/3w1p47852522h456/?p=a7de82ca63a34e8ab78988cd2ec574ef&pi=4
    DOI: 10.1007/s00531-008-0324-1
    Language: English
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  • 8
    Online Resource
    Online Resource
    Three monthly coral Sr/Ca records from the Chagos Archipelago covering the period of 19501995 A.D. : reproducibility and implications for quantitative reconstructions of sea surface temperature variations (2008)
    Associated volumes
    Details Availability
    In: International journal of earth sciences, Berlin : Springer, 1999, (2008), 1437-3262
    In: year:2008
    In: extent:14
    Type of Medium: Online Resource
    Pages: 14 , graph. Darst
    ISSN: 1437-3262
    DOI: 10.1007/s00531-008-0326-z
    Language: English
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  • 9
    Online Resource
    Online Resource
    Patterns of Pacific decadal variability recorded by Indian Ocean corals (2008)
    Associated volumes
    Details Availability
    In: International journal of earth sciences, Berlin : Springer, 1999, (2008), 1437-3262
    In: year:2008
    In: extent:12
    Description / Table of Contents: We investigate Pacific Decadal Oscillation (PDO) signals recorded by two bimonthly resolved coral Delta 18 O series from La Réunion and Ifaty (West Madagascar), Indian Ocean from 1882 to 1993. To isolate the main PDO frequencies, we apply a band pass filter to the time series passing only periodicities from 16 to 28 years. We investigate the covariance patterns of the coral time series with sea surface temperature (SST) and sea level pressure (SLP) of the Indian and Pacific Oceans. In addition, the empirical orthogonal functions of the filtered SST and SLP fields (single and coupled) are related to the filtered coral times series. The covariance maps show the typical PDO pattern for SST and SLP, confirming the coupling between the Indian and Pacific Oceans. Both corals show the strongest signal in boreal summer. The La Réunion (Ifaty) coral better records SST (SLP) than SLP (SST) pattern variability. We suggest that the filtered La Réunion coral Delta 18 O represents Delta 18 O of seawater that varies with the South Equatorial Current, which, in turn, is linked with the SST PDO. The filtered Ifaty coral Delta 18 O represents SST and is remotely linked with the SLP PDO variability. A combined coral record of the Ifaty and La Réunion boreal summer Delta 18 O series explains about 64% of the variance of the coupled SST/SLP PDO time series.
    Type of Medium: Online Resource
    Pages: 12 , graph. Darst
    ISSN: 1437-3262
    DOI: 10.1007/s00531-008-0324-1
    Language: English
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  • 10
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    Monthly Tahiti coral Sr/Ca and oxygen isotope data from IODP Hole 310-M0024A (2012)
    PANGAEA
    In:  Supplement to: Felis, Thomas; Merkel, Ute; Asami, Ryuji; Deschamps, Pierre; Hathorne, Ed C; Kölling, Martin; Bard, Edouard; Cabioch, Guy; Durand, Nicolas; Prange, Matthias; Schulz, Michael; Cahyarini, Sri Yudawati; Pfeiffer, Miriam (2012): Pronounced interannual variability in tropical South Pacific temperatures during Heinrich Stadial 1. Nature Communications, 3, 965, https://doi.org/10.1038/ncomms1973
    Details
    Publication Date: 2023-06-27
    Description: The early last glacial termination was characterized by intense North Atlantic cooling and weak overturning circulation. This interval between ~18,000 and 14,600 years ago, known as Heinrich Stadial 1, was accompanied by a disruption of global climate and has been suggested as a key factor for the termination. However, the response of interannual climate variability in the tropical Pacific (El Niño-Southern Oscillation) to Heinrich Stadial 1 is poorly understood. Here we use Sr/Ca in a fossil Tahiti coral to reconstruct tropical South Pacific sea surface temperature around 15,000 years ago at monthly resolution. Unlike today, interannual South Pacific sea surface temperature variability at typical El Niño-Southern Oscillation periods was pronounced at Tahiti. Our results indicate that the El Niño-Southern Oscillation was active during Heinrich Stadial 1, consistent with climate model simulations of enhanced El Niño-Southern Oscillation variability at that time. Furthermore, a greater El Niño-Southern Oscillation influence in the South Pacific during Heinrich Stadial 1 is suggested, resulting from a southward expansion or shift of El Niño-Southern Oscillation sea surface temperature anomalies.
    Keywords: 310-M0024A; Calculated, see reference(s); DP Hunter; DRILL; Drilling/drill rig; Exp310; ICP-OES, Perkin-Elmer, Optima 3300R; Integrated Ocean Drilling Program / International Ocean Discovery Program; Internal coral chronology; IODP; Mass spectrometer Finnigan MAT 251; Porites sp., Strontium/Calcium ratio; Porites sp., δ18O; Sample code/label; TAH-02A-5F; Tahiti, offshore Tiarei; Tahiti Sea Level
    Type: Dataset
    Format: text/tab-separated-values, 1068 data points
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