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  • 1
    Online Resource
    Online Resource
    Role of Panama uplift on oceanic freshwater balance
    Geological Society of America ; 2001
    In:  Geology Vol. 29, No. 3 ( 2001), p. 207-
    Details
    In: Geology, Geological Society of America, Vol. 29, No. 3 ( 2001), p. 207-
    Type of Medium: Online Resource
    ISSN: 0091-7613
    URL: Article
    DOI: 10.1130/0091-7613(2001)029〈0207:ROPUOO〉2.0.CO;2
    Language: English
    Publisher: Geological Society of America
    Publication Date: 2001
    detail.hit.zdb_id: 184929-3
    detail.hit.zdb_id: 2041152-2
    SSG: 13
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  • 2
    Online Resource
    Online Resource
    Surface- and deep-water hydrography and meltwater events in the mid-latitude North Atlantic Ocean over the past 160,000 years
    University of New Brunswick Libraries - UNB ; 2001
    In:  Atlantic Geology Vol. 37, No. 2/3 ( 2001-10-01)
    Details
    In: Atlantic Geology, University of New Brunswick Libraries - UNB, Vol. 37, No. 2/3 ( 2001-10-01)
    Abstract: An investigation involving stable oxygen and carbon isotopes on core Ml5612 from the Mid-Atlantic Ridge (445N, 26°W) shows that distinct negative δIRO anomalies punctuate the plank tonic isotope records and correlate with the ice-raftcd detritus (IRD) events. Within most IRD layers, detntal carbonate contributes between 1 and 13% and supports the contention that the layers are the southern equivalents of the northern North Atlantic Ocean's Heinnch events Anomalies are strongest for the Neogloboquadrina pachyderma (sinistral coiling) isotope record. Systematic changes in the δIRO offset between Globigerina bulloides and Globorotalia inflata signify variations in the mid-latitude thermocline structure. In conjunction with negative benthic δIRC anomalies, the data document a stronger contribution of an IRO-depleted, nutrient-rich water mass during the Heinrich events. The δIRC amplitude of 〉 l% between 25 and 57 ka indicates changes between northern-source (North Atlantic Deep Water) and southern-source (Antarctic Bottom Water) water masses at this site. The Heinrich layers in the mid-latitude core arc correlative with those from a core off Portugal. This synchronicity may have resulted from common changes in a North Atlantic thermohaline switch. RÉSUMÉ Une étude touchanl les isotopes lourds d'oxyéene ct de carbone du noyau M156I2 dc la ride médio-allantique (44=nord. 26° ouest) révéle que des anomalies negatives distinctes de δIRO ponctuent les enregistrements d'isotopes planctoniques et les rapprochent avec des phenomènes d'alimcntation en débris glaciels. La contribution du carbonate délrilique varie entre 1 et 13% a l'inteneur de la majorité des couches de débris glaciels, ce qui conforte la théorie que les couches constituent les équivalents méndionaux des phènoménes de Heinrich septentnonaux de I'Atlantique Nord Les anomalies sont les plus prononcées dans le cas de 1'enregislrcmcnt d'isotopes de Neogloboquadrina pachyderma (enroulement sénestre). Les changements systématiques dans le décalage de δIRO entre le Globigerina bulloides et le Globorotalia inflata témoignent de variations dans la structure de la thermocline de latitude moyenne. Conjointement à des anomalies de δIRO benthiques négatives, les données documenient une contribution plus marquée d'une masse d'eau riche en éléments nutrilifs et a faible tcneur en IRO pendant les phènomèncs de Heinrich. L'amplitude de δIRO de 〉 l% entre 25 el 57 Ka révélent des changements entre les masses d'eau d'origme septentrionale (eaux profondes de l'Atlantique Nord) et d'origine méndronale (eaux dc fond de l'Antartique) en cet emplacement. Les couches de Heinrich du noyau dc latitude moyenne se rapprochent de celles d'un noyau au large du Portugal. Cette synchronicité pourrait découler de changements communs dans une substitution thermohaline de l'Allantique Nord Traduit par la rédaction
    Type of Medium: Online Resource
    ISSN: 1718-7885 , 0843-5561
    URL: Article
    DOI: 10.4138/1976
    Language: Unknown
    Publisher: University of New Brunswick Libraries - UNB
    Publication Date: 2001
    detail.hit.zdb_id: 1007669-4
    detail.hit.zdb_id: 2266977-2
    SSG: 13
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  • 3
    Online Resource
    Online Resource
    Surface and deep water response to rapid climate changes at the Western Iberian Margin
    Elsevier BV ; 2003
    In:  Global and Planetary Change Vol. 36, No. 4 ( 2003-05), p. 237-264
    Details
    In: Global and Planetary Change, Elsevier BV, Vol. 36, No. 4 ( 2003-05), p. 237-264
    Type of Medium: Online Resource
    ISSN: 0921-8181
    URL: Article
    DOI: 10.1016/S0921-8181(02)00197-2
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2003
    detail.hit.zdb_id: 20361-0
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    SSG: 13
    SSG: 14
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  • 4
    Online Resource
    Online Resource
    Upper ocean circulation in the glacial North Atlantic from benthic foraminiferal isotope and trace element fingerprinting
    American Geophysical Union (AGU) ; 2000
    In:  Paleoceanography Vol. 15, No. 5 ( 2000-10), p. 515-527
    Details
    In: Paleoceanography, American Geophysical Union (AGU), Vol. 15, No. 5 ( 2000-10), p. 515-527
    Abstract: Benthic Cd/Ca and δ 13 C records from the midlatitude and northern North Atlantic are used to derive nutrient inventories and water mass distribution patterns for the past 50,000 years. Inferred Holocene water column Cd concentrations (CdW′) and δ 13 C values are 0.17–0.24 nmol kg −1 and 1.0–1.3‰ Peedee belemnite (PDB), which document the dominance of nutrient‐depleted Mediterranean Outflow Water (MOW) and Upper North Atlantic Deep Water (UNADW). Glacial benthic Cd/Ca and δ 13 C indicate a continued contribution of UNADW to the northern North Atlantic and upper Portuguese margin (CdW′=0.08 nmol kg −1 ; δ 13 C=+1.86‰ PDB). At the upper Moroccan margin, glacial CdW′ (0.23 nmol kg −1 ) is higher, and δ 13 C (+1.44‰ PDB) is lower. During “Heinrich” events, benthic δ 13 C decreases by up to 1.3‰, and peak Cd/Ca increases by 0.1–0.14 µmol mol −1 ; water column phosphorus equivalents are 1.8–2.8 µmol kg −1 . The combined Cd/Ca and δ 13 C pattern indicates that during mean glacial conditions Antarctic Intermediate Water, (AAIW) reached the midlatitude northeast Atlantic (30°N). During Heinrich events, AAIW contribution maximized so that Southern Hemisphere waters filled the North Atlantic basin from bottom water to middepth levels.
    Type of Medium: Online Resource
    ISSN: 0883-8305 , 1944-9186
    URL: Article
    DOI: 10.1029/1999PA000467
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2000
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  • 5
    Online Resource
    Online Resource
    Suborbital intermediate water variability inferred from paired benthic foraminiferal Cd/Ca and δ13C in the tropical West Atlantic and linking with North Atlantic climates
    Elsevier BV ; 2002
    In:  Earth and Planetary Science Letters Vol. 200, No. 1-2 ( 2002-6), p. 191-205
    Details
    In: Earth and Planetary Science Letters, Elsevier BV, Vol. 200, No. 1-2 ( 2002-6), p. 191-205
    Type of Medium: Online Resource
    ISSN: 0012-821X
    URL: Article
    DOI: 10.1016/S0012-821X(02)00613-1
    RVK:
    TE 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2002
    detail.hit.zdb_id: 300203-2
    detail.hit.zdb_id: 1466659-5
    SSG: 16,13
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  • 6
    Online Resource
    Online Resource
    Monsoon linkages
    Springer Science and Business Media LLC ; 2003
    In:  Nature Vol. 421, No. 6921 ( 2003-1), p. 324-325
    Details
    In: Nature, Springer Science and Business Media LLC, Vol. 421, No. 6921 ( 2003-1), p. 324-325
    Type of Medium: Online Resource
    ISSN: 0028-0836 , 1476-4687
    URL: Article
    DOI: 10.1038/421324a
    RVK:
    TA 1000
    RVK:
    UA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2003
    detail.hit.zdb_id: 120714-3
    detail.hit.zdb_id: 1413423-8
    SSG: 11
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  • 7
    Online Resource
    Online Resource
    340,000-Year Centennial-Scale Marine Record of Southern Hemisphere Climatic Oscillation
    American Association for the Advancement of Science (AAAS) ; 2003
    In:  Science Vol. 301, No. 5635 ( 2003-08-15), p. 948-952
    Details
    In: Science, American Association for the Advancement of Science (AAAS), Vol. 301, No. 5635 ( 2003-08-15), p. 948-952
    Abstract: In order to investigate rapid climatic changes at mid-southern latitudes, we have developed centennial-scale paleoceanographic records from the southwest Pacific that enable detailed comparison with Antarctic ice core records. These records suggest close coupling of mid-southern latitudes with Antarctic climate during deglacial and interglacial periods. Glacial sections display higher variability than is seen in Antarctic ice cores, which implies climatic decoupling between mid- and high southern latitudes due to enhanced circum-Antarctic circulation. Structural and temporal similarity with the Greenland ice core record is evident in glacial sections and suggests a degree of interhemispheric synchroneity not predicted from bipolar ice core correlations.
    Type of Medium: Online Resource
    ISSN: 0036-8075 , 1095-9203
    URL: Article
    DOI: 10.1126/science.1084451
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2003
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    detail.hit.zdb_id: 2066996-3
    detail.hit.zdb_id: 2060783-0
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  • 8
    Online Resource
    Online Resource
    Paleoproductivity increase at the Eocene–Oligocene climatic transition: ODP/DSDP sites 763 and 592
    Elsevier BV ; 2001
    In:  Palaeogeography, Palaeoclimatology, Palaeoecology Vol. 172, No. 1-2 ( 2001-8), p. 153-170
    Details
    In: Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier BV, Vol. 172, No. 1-2 ( 2001-8), p. 153-170
    Type of Medium: Online Resource
    ISSN: 0031-0182
    URL: Article
    DOI: 10.1016/S0031-0182(01)00280-2
    RVK:
    TE 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2001
    detail.hit.zdb_id: 1497393-5
    detail.hit.zdb_id: 417718-6
    SSG: 12
    SSG: 13
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  • 9
    Online Resource
    Online Resource
    Abrupt Temperature Changes in the Western Mediterranean over the Past 250,000 Years
    American Association for the Advancement of Science (AAAS) ; 2004
    In:  Science Vol. 306, No. 5702 ( 2004-12-03), p. 1762-1765
    Details
    In: Science, American Association for the Advancement of Science (AAAS), Vol. 306, No. 5702 ( 2004-12-03), p. 1762-1765
    Abstract: A continuous high-resolution Western Mediterranean sea surface temperature (SST) alkenone record spanning the past 250,000 years shows that abrupt changes were more common at warming than at cooling. During marine isotope stage (MIS) 6, SST oscillated following a stadial-interstadial pattern but at lower intensities and rates of change than in the Dansgaard/Oeschger events of MIS 3. Some of the most prominent events occurred over MISs 5 and 7, after prolonged warm periods of high stability. Climate during the whole period was predominantly maintained in interglacial-interstadial conditions, whereas the duration of stadials was much shorter.
    Type of Medium: Online Resource
    ISSN: 0036-8075 , 1095-9203
    URL: Article
    DOI: 10.1126/science.1101706
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: American Association for the Advancement of Science (AAAS)
    Publication Date: 2004
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  • 10
    Online Resource
    Online Resource
    Variability of the western Mediterranean Sea surface temperature during the last 25,000 years and its connection with the Northern Hemisphere climatic changes
    American Geophysical Union (AGU) ; 2001
    In:  Paleoceanography Vol. 16, No. 1 ( 2001-02), p. 40-52
    Details
    In: Paleoceanography, American Geophysical Union (AGU), Vol. 16, No. 1 ( 2001-02), p. 40-52
    Abstract: Sea surface temperature (SST) profiles over the last 25 kyr derived from alkenone measurements are studied in four cores from a W‐E latitudinal transect encompassing the Gulf of Cadiz (Atlantic Ocean), the Alboran Sea, and the southern Tyrrhenian Sea (western Mediterranean). The results document the sensitivity of the Mediterranean region to the short climatic changes of the North Atlantic Ocean, particularly those involving the latitudinal position of the polar front. The amplitude of the SST oscillations increases toward the Tyrrhenian Sea, indicating an amplification effect of the Atlantic signal by the climatic regime of the Mediterranean region. All studied cores show a shorter cooling phase (700 years) for the Younger Dryas (YD) than that observed in the North Atlantic region (1200 years). This time diachroneity is related to an intra‐YD climatic change documented in the European continent. Minor oscillations in the southward displacement of the North Atlantic polar front may also have driven this early warming in the studied area. During the Holocene a regional diachroneity propagating west to east is observed for the SST maxima, 11.5–10.2 kyr B.P. in the Gulf of Cadiz, 10–9 kyr B.P. in the Alboran Sea, and 8.9–8.4 kyr B.P. in the Thyrrenian Sea. A general cooling trend from these SST maxima to present day is observed during this stage, which is marked by short cooling oscillations with a periodicity of 730±40 years and its harmonics.
    Type of Medium: Online Resource
    ISSN: 0883-8305 , 1944-9186
    URL: Article
    DOI: 10.1029/2000PA000502
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2001
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    SSG: 16,13
    SSG: 13
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