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  • 1
    Online Resource
    Online Resource
    Protein Secretion and Export in Bacteria. (1986)
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Details
    Keywords: Proteins. ; Bacteria. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (211 pages)
    Edition: 1st ed.
    ISBN: 9783642712517
    Series Statement: Current Topics in Microbiology and Immunology Series ; v.125
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6563205
    DDC: 547.75
    Language: English
    Location Call Number Limitation Availability
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    GEOMAR EBL
  • 2
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    Oxygen isotopes and Sr/Ca ratios of fossil corals from Bonaire (2017)
    PANGAEA
    In:  Supplement to: Wu, Henry C; Felis, Thomas; Scholz, Denis; Giry, Cyril; Kölling, Martin; Jochum, Klaus Peter; Scheffers, Sander R (2017): Changes to Yucatán Peninsula precipitation associated with salinity and temperature extremes of the Caribbean Sea during the Maya civilization collapse. Scientific Reports, 7, 15825, https://doi.org/10.1038/s41598-017-15942-0
    Details
    Publication Date: 2024-02-21
    Description: Explanations of the Classic Maya civilization demise on the Yucatán Peninsula during the Terminal Classic Period (TCP; ~CE 750-1050) are controversial. Multiyear droughts are one likely cause, but the role of the Caribbean Sea, the dominant moisture source for Mesoamerica, remains largely unknown. Here we present bimonthly-resolved snapshots of reconstructed sea surface temperature (SST) and salinity (SSS) variability in the southern Caribbean from precisely dated fossil corals. The results indicate pronounced interannual to decadal SST and SSS variability during the TCP, which may be temporally coherent to precipitation anomalies on the Yucatán. Our results are best explained by changed Caribbean SST gradients affecting the Caribbean low-level atmospheric jet with consequences for Mesoamerican precipitation, which are possibly linked to changes in Atlantic Meridional Overturning Circulation strength. Our findings provide a new perspective on the anomalous hydrological changes during the TCP that complement the oft-suggested southward displacement of the Intertropical Convergence Zone. We advocate for a strong role of Caribbean SST and SSS condition changes and related ocean-atmosphere interactions that notably influenced the propagation and transport of precipitation to the Yucatán Peninsula during the TCP.
    Keywords: Center for Marine Environmental Sciences; MARUM
    Type: Dataset
    Format: application/zip, 7 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    High-resolution stable oxygen isotopes, and bulk 87Sr/86Sr ratios and clumped isotopes in modern and archaeological (3.0 to 5.3 ka) catfish otoliths (Carlarius spp.) and bivalve shells (Senilia senilis) from the Banc d'Arguin, Mauritania (2018)
    PANGAEA
    In:  Supplement to: Höpker, Sebastian N; Wu, Henry C; Müller, Peter; Barusseau, Jean-Paul; Vernet, Robert; Lucassen, Friedrich; Kasemann, Simone A; Westphal, Hildegard (2019): Pronounced Northwest African Monsoon Discharge During the Mid- to Late Holocene. Frontiers in Earth Science, 7, https://doi.org/10.3389/feart.2019.00314
    Details
    Publication Date: 2024-02-21
    Description: Modern and archaeological catfish otoliths (Carlarius spp.) and bivalve shells (Senilia senilis) from a large paleo-estuary east of the Banc d'Arguin, Mauritania, NW Africa, were assessed to obtain information on paleoenvironmental conditions and the NW African hydroclimate during the mid- to late Holocene (ca. 3.0 - 5.3 ka BP). High-resolution (sub-seasonally resolved) ontogenetic stable oxygen isotope (δ18O) records and bulk 87Sr/86Sr analyses indicate monsoonal discharge to the Banc d'Arguin between 5.0 to 5.3 ka BP. Carbonate clumped isotope thermometry was used to test archaeological samples for potential pre-depositional alteration due to prehistoric cooking treatments.
    Keywords: Leibniz Centre for Tropical Marine Research; ZMT
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 4
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    Grain size, skeletal components and C14 measurements of sediments from the reef island Barrang Lompo, Spermonde Archipelago, Indonesia (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-21
    Description: The dataset is based on 50 soft carbonate sediment samples from the reef island Barrang Lompo in the Spermonde Archipelago, Sulawesi, SE Asia. The subsurface samples were obtained by percussion drilling at 5 coring locations on the island. From each coring location, 10 samples were retrieved in 1 m intervals, thus providing samples from a maximum depth of 10 m below surface at each site (1 m, 2 m, ..., 10 m) using percussion drilling (jackhammer: WACKER BH 23, Wacker Neuson SE, probe: direct push corer with internal liner (1m length & 46 mm diameter)). Samples were taken from lowest 10 cm of probe. Examples: BL1-1 is sample from location BL1 in depth interval 90-100 cm. BL4-7 is sample from location BL4 in depth interval 690-700 cm. Laboratory data was collected between 2019 and 2021. The provided dataset contains grain size (raw and processed data; using GRADISTAT by Blott & Pye, 2001), skeletal component analysis (counting of fragments, 500 per sample; raw data) and facies determination (based on grain size and skeletal composition) of each sample. Additionally, the dataset provides raw and calibrated radiocarbon ages from 20 selected samples (calibration curve by Heaton et al. 2020; marine reservoir correction by Southon et al. 2002; calibration tool OxCal v4.4 by Bronk Ramsey, 2009). For the radiocarbon analyses, picked and pooled foraminifera of the genus Calcarina were chosen. These 20 samples were furthermore classified in terms of abrasion (1=very good preserved,... 4=very poorly preserved), following suggestions by Fellowes et al. 2017. The calibrated ages cover the earlier to late Holocene (~7,000 to 2,000 years BP). The collected data provides information of reef-derived sedimentation in the Holocene in the Spermonde Archipelago. It provides insight into the ecological background and the origin of the skeletal sediments.
    Keywords: Carbonate Sediments; Facies; Grain Size; Holocene; Leibniz Centre for Tropical Marine Research; radiocarbon age; Reef island; sediment archives; Southeast Asia; Spermonde Archipelago; SW Sulawesi; ZMT
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
  • 5
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    Annual average Sr/Ca measurements from Porites lutea coral at Ha'afera Island, Tonga (2013)
    PANGAEA
    In:  Supplement to: Wu, Henry C; Linsley, Braddock K; Dassié, Emilie Pauline; Schiraldi, Benedetto; deMenocal, Peter B (2013): Oceanographic variability in the South Pacific Convergence Zone region over the last 210 years from multi-site coral Sr/Ca records. Geochemistry, Geophysics, Geosystems, 14(5), 1435-1453, https://doi.org/10.1029/2012GC004293
    Details
    Publication Date: 2024-02-21
    Description: In the South Pacific Convergence Zone (SPCZ), the variability in a sub-seasonally resolved microatoll Porites colony Sr/Ca record from Tonga and a previously published high-resolution record from Fiji are strongly influenced by sea surface temperature (SST) over the calibration period from 1981 to 2004 (R^2 = 0.67 - 0.68). However, the Sr/Ca-derived SST correlation to instrumental SST decreases back in time. The lower frequency secular trend (~1°C) and decadal-scale (~2 - 3°C) modes in Sr/Ca-derived SST are almost two times larger than that observed in instrumental SST. The coral Sr/Ca records suggest that local effects on SST generate larger amplitude variability than gridded SST products indicate. Reconstructed d18O of seawater (d18Osw) at these sites correlate with instrumental sea surface salinity (SSS; r = 0.64 - 0.67) but not local precipitation (r = -0.10 to - 0.22) demonstrating that the advection and mixing of different salinity water masses may be the predominant control on d18Osw in this region. The Sr/Ca records indicate SST warming over the last 100 years and appears to be related to the expansion of the western Pacific warm pool (WPWP) including an increasing rate of expansion in the last ~20 years. The reconstructed d18Osw over the last 100 years also shows surface water freshening across the SPCZ. The warming and freshening of the surface ocean in our study area suggests that the SPCZ has been shifting (expanding) southeast, possibly related to the southward shift and intensification of the South Pacific gyre over the last 50 years in response to strengthened westerly winds.
    Keywords: Age; AGE; Center for Marine Environmental Sciences; DHC; Diver-held corer; Ha afera Island, Tonga; MARUM; Strontium/Calcium ratio; Tonga_TH1
    Type: Dataset
    Format: text/tab-separated-values, 426 data points
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    DATA PANGAEA
  • 6
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    Annually-resolved coral-based d11B-pH reconstruction for the past 323 years from New Caledonia (2018)
    PANGAEA
    In:  Supplement to: Wu, Henry C; Dissard, Delphine; Douville, Eric; Blamart, Dominique; Bordier, Louise; Tribollet, Aline; Le Cornec, Florence; Pons-Branchu, Edwige; Dapoigny, Arnaud; Lazareth, Claire E (2018): Surface ocean pH variations since 1689 CE and recent ocean acidification in the tropical South Pacific. Nature Communications, 9(1), 2543, https://doi.org/10.1038/s41467-018-04922-1
    Details
    Publication Date: 2024-02-21
    Description: Increasing atmospheric CO2 from man-made climate change is reducing surface ocean pH. Due to limited instrumental measurements and historical pH records in the world's oceans, seawater pH variability at the decadal and centennial scale remains largely unknown and requires documentation. Here we present evidence of striking secular trends of decreasing pH since the late nineteenth century with pronounced interannual to decadal–interdecadal pH variability in the South Pacific Ocean from 1689 to 2011 CE. High-amplitude oceanic pH changes, likely related to atmospheric CO2 uptake and seawater dissolved inorganic carbon fluctuations, reveal a coupled relationship to sea surface temperature variations and highlight the marked influence of El Niño/Southern Oscillation and Interdecadal Pacific Oscillation. We suggest changing surface winds strength and zonal advection processes as the main drivers responsible for regional pH variability up to 1881 CE, followed by the prominent role of anthropogenic CO2 in accelerating the process of ocean acidification.
    Keywords: Age; AGE; Diploastrea heliopora, δ11B; Diploastrea heliopora, δ11B, standard deviation; Diploastrea heliopora, δ13C; Diploastrea heliopora, δ18O; New_Caledonia
    Type: Dataset
    Format: text/tab-separated-values, 1598 data points
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    DATA PANGAEA
  • 7
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    Clipperton Atoll replicated coral Sr/Ca-SST and reconstructed δ¹⁸O of seawater composite (1874-1994 CE) (2018)
    PANGAEA
    In:  Supplement to: Wu, Henry C; Moreau, Mélanie; Linsley, Braddock K; Schrag, Daniel P; Corrège, Thierry (2014): Investigation of sea surface temperature changes from replicated coral Sr/Ca variations in the eastern equatorial Pacific (Clipperton Atoll) since 1874. Palaeogeography, Palaeoclimatology, Palaeoecology, 412, 208-222, https://doi.org/10.1016/j.palaeo.2014.07.039
    Details
    Publication Date: 2024-02-21
    Description: Sub-seasonally resolved and replicated coral Sr/Ca time series at Clipperton Atoll (10°18'N, 109°13'W) in the eastern Pacific are assessed as a sea surface temperature (SST) proxy in this region with small seasonal SST variability. The composite coral Sr/Ca time series is a partially replicated record of three live and one sub-modern colony of Porites lobata extending back to 1874. Large inter-colony coral Sr/Ca offsets equate to relative SST differences of 0.6 to 4.3 °C and limit the ability to reconstruct absolute SST changes. Moreover, the replication method revealed a 12-year section of growth in one colony where mean Sr/Ca was anomalously low (~ 1 °C higher SST) relative to the other colonies without evidence of diagenesis or other significant skeletal alterations. The presence of this anomalous interval supports the need for multi-coral Sr/Ca replication in specific sites or regions. The Clipperton Composite Sr/Ca anomaly record is significantly coherent (r = 0.71-0.76, p 〈 0.001) with gridded instrumental SSTs but with larger amplitude decadal variance that appears to more accurately represent actual SST variability at Clipperton. The amplitude of the secular warming trend during the last century at Clipperton is 0.3 to 0.6 °C larger (~ twice as large) than the trend in the poorly "ground-truthed" instrumental SST records for the region. The interannual and decadal variability in Clipperton coral Sr/Ca demonstrates strong coherence to the Pacific Decadal Oscillation and the El Niño/Southern Oscillation (ENSO) with reduced ENSO variability from 1920 to late 1930s and enhanced variability in the late twentieth century.
    Keywords: Age; AGE; Clipperton Atoll; ClippertonComposite; Composite records; Porites lobata, Strontium/Calcium ratio; Porites lobata, Strontium/Calcium ratio anomaly; Porites lobata, δ18O; Porites lobata, δ18O anomaly; δ18O, seawater, reconstructed anomaly
    Type: Dataset
    Format: text/tab-separated-values, 8630 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Raw grain sizes of sediments from the reef island Barrang Lompo, Spermonde Archipelago, Indonesia (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-21
    Description: The dataset is based on 50 soft carbonate sediment samples from the reef island Barrang Lompo in the Spermonde Archipelago, Sulawesi, SE Asia. The subsurface samples were obtained by percussion drilling at 5 coring locations on the island. From each coring location, 10 samples were retrieved in 1 m intervals, thus providing samples from a maximum depth of 10 m below surface at each site (1 m, 2 m, ..., 10 m). Laboratory data was collected between 2019 and 2021. The provided dataset contains raw grain sizes determined after dry sieving. Samples were weighed before sieving (initial mass). After sieving, fractions (diameters from 32 mm to 0.0063 mm) from each sieve were weighed to analyze grain size distribution. The collected data provides information of reef-derived sedimentation in the Holocene in the Spermonde Archipelago.
    Keywords: Barrang_Lompo_1; Barrang_Lompo_2; Barrang_Lompo_3; Barrang_Lompo_4; Barrang_Lompo_5; BL1; BL2; BL3; BL4; BL5; Calculated average/mean values; Carbonate Sediments; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Dried and weighted; Dry sieving; Event label; Facies; Grain Size; Holocene; Leibniz Centre for Tropical Marine Research; PCOR; Percussion corer; radiocarbon age; Reef island; Sample ID; Sediment, dry mass; sediment archives; Size fraction 〈 0.063 mm, mud, silt+clay; Size fraction 0.125-0.063 mm; Size fraction 0.250-0.125 mm; Size fraction 0.500-0.250 mm; Size fraction 1.000-0.500 mm, 0.0-1.0 phi, coarse sand; Size fraction 16-8 mm, medium gravel; Size fraction 2.000-1.000 mm, (-1.0)-0.0 phi, very coarse sand; Size fraction 32-16 mm, coarse gravel, pebble; Size fraction 4.0-2.0 mm, very fine gravel, granule; Size fraction 8.0-4.0 mm, fine gravel; Southeast Asia; Spermonde Archipelago; SW Sulawesi; ZMT
    Type: Dataset
    Format: text/tab-separated-values, 655 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Grain size analysis of sediments from the reef island Barrang Lompo, Spermonde Archipelago, Indonesia (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-21
    Description: The dataset is based on 50 soft carbonate sediment samples from the reef island Barrang Lompo in the Spermonde Archipelago, Sulawesi, SE Asia. The subsurface samples were obtained by percussion drilling at 5 coring locations on the island. From each coring location, 10 samples were retrieved in 1 m intervals, thus providing samples from a maximum depth of 10 m below surface at each site (1 m, 2 m, ..., 10 m). Laboratory data was collected between 2019 and 2021. The provided dataset contains processed grain size data using GRADISTAT by Blott & Pye (2001). The collected data provides information of reef-derived sedimentation in the Holocene in the Spermonde Archipelago.
    Keywords: Arithmetic method of moments; Barrang_Lompo_1; Barrang_Lompo_2; Barrang_Lompo_3; Barrang_Lompo_4; Barrang_Lompo_5; BL1; BL2; BL3; BL4; BL5; Calculated; Calculated average/mean values; Carbonate Sediments; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Facies; Geometric method of moments; Grain quartile 75%/Grain quartile 25%; Grain Size; Grain size, distribution, interquartile range; Grain size, distribution interquartile range; Grain size, distribution spread; Grain size, mean; Grain size description; Grain size parameters (Folk and Ward, 1957); Gravel; Holocene; Kurtosis; Kurtosis description; Leibniz Centre for Tropical Marine Research; Logarithmic method of moments; Median, grain size; Mode, grain size; Mud; PCOR; Percentile 10; Percentile 90; Percussion corer; radiocarbon age; Ratio to 10 percentile; Reef island; Sample ID; Sample type; Sand; sediment archives; Sediment type; Sieving, error relative; Size fraction 〈 0.002 mm, clay; Size fraction 0.004-0.002 mm, 8.0-9.0 phi, very fine silt; Size fraction 0.008-0.004 mm, 7.0-8.0 phi, fine silt; Size fraction 0.016-0.008 mm, 6.0-7.0 phi, medium silt; Size fraction 0.032-0.016 mm, 5.0-6.0 phi, coarse silt; Size fraction 0.063-0.032 mm, 4.0-5.0 phi, very coarse silt; Size fraction 0.125-0.063 mm, 3.0-4.0 phi, very fine sand; Size fraction 0.250-0.125 mm, 2.0-3.0 phi, fine sand; Size fraction 0.500-0.250 mm, 1.0-2.0 phi, medium sand; Size fraction 1.000-0.500 mm, 0.0-1.0 phi, coarse sand; Size fraction 16-8 mm, medium gravel; Size fraction 2.000-1.000 mm, (-1.0)-0.0 phi, very coarse sand; Size fraction 32-16 mm, coarse gravel, pebble; Size fraction 4.0-2.0 mm, very fine gravel, granule; Size fraction 64-32 mm, very coarse gravel, pebble; Size fraction 8.0-4.0 mm, fine gravel; Skewness; Skewness description; Sorting; Sorting description; Southeast Asia; Spermonde Archipelago; Statistical analysis GRADISTAT package (Blott and Pye, 2001); SW Sulawesi; Texture; ZMT
    Type: Dataset
    Format: text/tab-separated-values, 3350 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Skeletal components of sediments from the reef island Barrang Lompo, Spermonde Archipelago, Indonesia (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-21
    Description: The dataset is based on 50 soft carbonate sediment samples from the reef island Barrang Lompo in the Spermonde Archipelago, Sulawesi, SE Asia. The subsurface samples were obtained by percussion drilling at 5 coring locations on the island. From each coring location, 10 samples were retrieved in 1 m intervals, thus providing samples from a maximum depth of 10 m below surface at each site (1 m, 2 m, ..., 10 m). Laboratory data was collected between 2019 and 2021. The provided dataset contains skeletal component analysis (counting of fragments, 500 per sample; raw data). Microscope analysis of 200 components from fractions 〉2 mm and 2-1 mm and 100 components from fraction 1-0.5 mm. 12 different calcifying organisms were distinguished, of which 10 were identified in the present dataset. Non-identifiable grains were counted as bioclasts and not added to the sum of 200 and 100, respectively.The collected data provides information of reef-derived sedimentation in the Holocene in the Spermonde Archipelago. It provides insight into the ecological background and the origin of the skeletal sediments.
    Keywords: Balanidae; Barrang_Lompo_1; Barrang_Lompo_2; Barrang_Lompo_3; Barrang_Lompo_4; Barrang_Lompo_5; Bioclasts; Bivalvia; BL1; BL2; BL3; BL4; BL5; Bryozoa; Calculated average/mean values; Carbonate Sediments; Coral; Counting, microscope; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Echinodermata; Event label; Facies; Foraminifera; Gastropoda; Grain Size; Halimeda; Holocene; Leibniz Centre for Tropical Marine Research; Ostracoda; PCOR; Percussion corer; Porifera; radiocarbon age; Reef island; Rhodophyta; Sample ID; sediment archives; Serpulidae; Size fraction; Southeast Asia; Spermonde Archipelago; SW Sulawesi; ZMT
    Type: Dataset
    Format: text/tab-separated-values, 2550 data points
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    DATA PANGAEA
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