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  • 1
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    Coral Records of Temperature and Salinity in the Tropical Western Pacific Reveal Influence of the Pacific Decadal Oscillation Since the Late Nineteenth Century (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Abstract The Pacific Decadal Oscillation (PDO) is a complex aggregate of different atmospheric and oceanographic forcings spanning the extratropical and tropical Pacific. The PDO has widespread climatic and societal impacts, thus understanding the processes contributing to PDO variability is critical. Distinguishing PDO‐related variability is particularly challenging in the tropical Pacific due to the dominance of the El Niño–Southern Oscillation and influence of anthropogenic warming signals. Century‐long western Pacific records of subannual sea surface temperature (SST) and sea surface salinity (SSS), derived from coral Sr/Ca and δ18O profiles, respectively, allow for evaluating different climatic sensitivities and identifying PDO‐related variability in the region. The summer Sr/Ca‐SST record provides evidence of a significant SST increase, likely tied to greenhouse gas emissions. Anthropogenic warming is masked in the winter Sr/Ca‐SST record by interannual to multidecadal scale changes driven by the East‐Asian Winter Monsoon and the PDO. Decadal climate variability during winter is strongly correlated to the PDO, in agreement with other PDO records in the region. The PDO also exerts influence on the SSS difference between the dry and wet season coral δ18O (δ18Oc)‐SSS records through water advection. The PDO and El Niño–Southern Oscillation constructively combine to enhance/reduce advection of saline Kuroshio waters at our site. Overall, we are able to demonstrate that climate records from a tropical reef environment significantly capture PDO variability and related changes over the period of a century. This implies that the tropical western Pacific is a key site in understanding multifrequency climate variability, including its impact on tropical climate at longer timescales.
    Print ISSN: 0883-8305
    Electronic ISSN: 2572-4525
    Topics: Geosciences
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 2
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    Synchronous radiocarbon and climate shifts during the last deglaciation (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-11
    Description: Radiocarbon data from the Cariaco Basin provide calibration of the carbon-14 time scale across the period of deglaciation (15,000 to 10, 000 years ago) with resolution available previously only from Holocene tree rings. Reconstructed changes in atmospheric carbon-14 are larger than previously thought, with the largest change occurring simultaneously with the sudden climatic cooling of the Younger Dryas event. Carbon-14 and published beryllium-10 data together suggest that concurrent climate and carbon-14 changes were predominantly the result of abrupt shifts in deep ocean ventilation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hughen, K A -- Southon, J R -- Lehman, S J -- Overpeck, J T -- New York, N.Y. -- Science. 2000 Dec 8;290(5498):1951-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. khughen@whoi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11110659" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Rapid changes in the hydrologic cycle of the tropical Atlantic during the last glacial (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-01-11
    Description: Sedimentary time series of color reflectance and major element chemistry from the anoxic Cariaco Basin off the coast of northern Venezuela record large and abrupt shifts in the hydrologic cycle of the tropical Atlantic during the past 90,000 years. Marine productivity maxima and increased precipitation and riverine discharge from northern South America are closely linked to interstadial (warm) climate events of marine isotope stage 3, as recorded in Greenland ice cores. Increased precipitation at this latitude during interstadials suggests the potential for greater moisture export from the Atlantic to Pacific, which could have affected the salinity balance of the Atlantic and increased thermohaline heat transport to high northern latitudes. This supports the notion that tropical feedbacks played an important role in modulating global climate during the last glacial period.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Peterson, L C -- Haug, G H -- Hughen, K A -- Rohl, U -- New York, N.Y. -- Science. 2000 Dec 8;290(5498):1947-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, USA. lpeterson@rsmas.miami.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11110658" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Southward migration of the intertropical convergence zone through the Holocene (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-08-18
    Description: Titanium and iron concentration data from the anoxic Cariaco Basin, off the Venezuelan coast, can be used to infer variations in the hydrological cycle over northern South America during the past 14,000 years with subdecadal resolution. Following a dry Younger Dryas, a period of increased precipitation and riverine discharge occurred during the Holocene "thermal maximum." Since approximately 5400 years ago, a trend toward drier conditions is evident from the data, with high-amplitude fluctuations and precipitation minima during the time interval 3800 to 2800 years ago and during the "Little Ice Age." These regional changes in precipitation are best explained by shifts in the mean latitude of the Atlantic Intertropical Convergence Zone (ITCZ), potentially driven by Pacific-based climate variability. The Cariaco Basin record exhibits strong correlations with climate records from distant regions, including the high-latitude Northern Hemisphere, providing evidence for global teleconnections among regional climates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haug, G H -- Hughen, K A -- Sigman, D M -- Peterson, L C -- Rohl, U -- New York, N.Y. -- Science. 2001 Aug 17;293(5533):1304-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth Sciences, Eidgenossische Technische Hochschule-Zentrum, CH-8092 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509727" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Climate and the collapse of Maya civilization (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-15
    Description: In the anoxic Cariaco Basin of the southern Caribbean, the bulk titanium content of undisturbed sediment reflects variations in riverine input and the hydrological cycle over northern tropical South America. A seasonally resolved record of titanium shows that the collapse of Maya civilization in the Terminal Classic Period occurred during an extended regional dry period, punctuated by more intense multiyear droughts centered at approximately 810, 860, and 910 A.D. These new data suggest that a century-scale decline in rainfall put a general strain on resources in the region, which was then exacerbated by abrupt drought events, contributing to the social stresses that led to the Maya demise.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haug, Gerald H -- Gunther, Detlef -- Peterson, Larry C -- Sigman, Daniel M -- Hughen, Konrad A -- Aeschlimann, Beat -- New York, N.Y. -- Science. 2003 Mar 14;299(5613):1731-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth Sciences, ETH, CH-8092 Zurich, Switzerland. haug@gfz-potsdam.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12637744" target="_blank"〉PubMed〈/a〉
    Keywords: *Archaeology ; Civilization/*history ; *Climate ; Disasters/*history ; Geologic Sediments/chemistry ; History, Ancient ; Humans ; Indians, South American/*history ; Rain ; Titanium/analysis ; Venezuela
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    Synchroneity of tropical and high-latitude Atlantic temperatures over the last glacial termination (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-06
    Description: A high-resolution western tropical Atlantic sea surface temperature (SST) record from the Cariaco Basin on the northern Venezuelan shelf, based on Mg/Ca values in surface-dwelling planktonic foraminifera, reveals that changes in SST over the last glacial termination are synchronous, within +/-30 to +/-90 years, with the Greenland Ice Sheet Project 2 air temperature proxy record and atmospheric methane record. The most prominent deglacial event in the Cariaco record occurred during the Younger Dryas time interval, when SSTs dropped by 3 degrees to 4 degrees C. A rapid southward shift in the atmospheric intertropical convergence zone could account for the synchroneity of tropical temperature, atmospheric methane, and high-latitude changes during the Younger Dryas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lea, David W -- Pak, Dorothy K -- Peterson, Larry C -- Hughen, Konrad A -- New York, N.Y. -- Science. 2003 Sep 5;301(5638):1361-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geological Sciences and Marine Science Institute, University of California, Santa Barbara, CA 93106, USA. lea@geol.ucsb.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12958356" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Abrupt tropical vegetation response to rapid climate changes (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-05-25
    Description: Identifying leads and lags between high- and low-latitude abrupt climate shifts is needed to understand where and how such events were triggered. Vascular plant biomarkers preserved in Cariaco basin sediments reveal rapid vegetation changes in northern South America during the last deglaciation, 15,000 to 10,000 years ago. Comparing the biomarker records to climate proxies from the same sediment core provides a precise measure of the relative timing of changes in different regions. Abrupt deglacial climate shifts in tropical and high-latitude North Atlantic regions were synchronous, whereas changes in tropical vegetation consistently lagged climate shifts by several decades.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hughen, Konrad A -- Eglinton, Timothy I -- Xu, Li -- Makou, Matthew -- New York, N.Y. -- Science. 2004 Jun 25;304(5679):1955-9. Epub 2004 May 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. khughen@whoi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15155911" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; Biomass ; Carbon/analysis ; Carbon Isotopes/analysis ; *Climate ; Geography ; Geologic Sediments/chemistry ; Methane ; Organic Chemicals/*analysis ; *Plant Development ; Plants/metabolism ; South America ; Time ; Trees ; *Tropical Climate
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    PALEOECOLOGY. Abrupt warming events drove Late Pleistocene Holarctic megafaunal turnover (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-08-08
    Description: The mechanisms of Late Pleistocene megafauna extinctions remain fiercely contested, with human impact or climate change cited as principal drivers. We compared ancient DNA and radiocarbon data from 31 detailed time series of regional megafaunal extinctions and replacements over the past 56,000 years with standard and new combined records of Northern Hemisphere climate in the Late Pleistocene. Unexpectedly, rapid climate changes associated with interstadial warming events are strongly associated with the regional replacement or extinction of major genetic clades or species of megafauna. The presence of many cryptic biotic transitions before the Pleistocene/Holocene boundary revealed by ancient DNA confirms the importance of climate change in megafaunal population extinctions and suggests that metapopulation structures necessary to survive such repeated and rapid climatic shifts were susceptible to human impacts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cooper, Alan -- Turney, Chris -- Hughen, Konrad A -- Brook, Barry W -- McDonald, H Gregory -- Bradshaw, Corey J A -- New York, N.Y. -- Science. 2015 Aug 7;349(6248):602-6. doi: 10.1126/science.aac4315. Epub 2015 Jul 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Australian Centre for Ancient DNA, School of Earth and Environmental Sciences, and Environment Institute, University of Adelaide, Adelaide, Australia. alan.cooper@adelaide.edu.au c.turney@unsw.edu.au. ; Climate Change Research Centre and School of Biological, Earth, and Environmental Sciences, University of New South Wales, Sydney, Australia. alan.cooper@adelaide.edu.au c.turney@unsw.edu.au. ; Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. ; Environment Institute and School of Biological Sciences, University of Adelaide, Adelaide, Australia. School of Biological Sciences, University of Tasmania, Hobart, Australia. ; Museum Management Program, National Parks Service, Fort Collins, CO 80525, USA. ; Environment Institute and School of Biological Sciences, University of Adelaide, Adelaide, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26250679" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA/genetics/history/isolation & purification ; *Extinction, Biological ; Fossils/history ; Global Warming/*history ; History, Ancient ; Humans ; Paleontology ; Population
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
    Electronic Resource
    Electronic Resource
    Placing late Neanderthals in a climatic context (2007)
    [s.l.] : Nature Publishing Group
    Nature 449 (2007), S. 206-208 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Attempts to place Palaeolithic finds within a precise climatic framework are complicated by both uncertainty over the radiocarbon calibration beyond about 21,500 14C years bp and the absence of a master calendar chronology for climate events from reference archives ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature06117
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  • 10
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    Geochemical signature of land-based activities in Caribbean coral surface samples (2008)
    Springer
    Details
    Publication Date: 2008-08-22
    Print ISSN: 0722-4028
    Electronic ISSN: 1432-0975
    Topics: Biology , Geosciences
    Published by Springer
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