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  • Center for Marine Environmental Sciences; MARUM  (12)
  • Center for Marine Environmental Sciences; File format; File name; File size; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; MARUM; Uniform resource locator/link to file  (3)
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  • 11
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    Solar sensitivity experiments for the pre-industrial time period using the comprehensive global climate model CCSM3 (Community Climate System Model 3) (2011)
    PANGAEA
    In:  Supplement to: Varma, Vidya; Prange, Matthias; Lamy, Frank; Merkel, Ute; Schulz, Michael (2011): Solar-forced shifts of the Southern Hemisphere Westerlies during the Holocene. Climate of the Past, 7, 339-347, https://doi.org/10.5194/cp-7-339-2011
    Details
    Publikationsdatum: 2023-10-28
    Beschreibung: The Southern Hemisphere Westerly Winds (SWW) constitute an important zonal circulation that influences large-scale precipitation patterns and ocean circulation. Variations in their intensity and latitudinal position have been suggested to exert a strong influence on the CO2 budget in the Southern Ocean, thus making them a potential factor affecting the global climate. The possible influence of solar forcing on SWW variability during the Holocene is addressed. Solar sensitivity experiments with a comprehensive global climate model (CCSM3) are carried out to study the response of SWW to solar variability. In addition, It is shown that a high-resolution iron record from the Chilean continental slope (41° S), which is interpreted to reflect changes in the position of the SWW, is significantly correlated with reconstructed solar activity during the past 3000 years. Taken together, the proxy and model results suggest that centennial-scale periods of lower (higher) solar activity caused equatorward (southward) shifts of the annual mean SWW.
    Schlagwort(e): Center for Marine Environmental Sciences; File format; File name; File size; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; MARUM; Uniform resource locator/link to file
    Materialart: Dataset
    Format: text/tab-separated-values, 36 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 12
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    Transient Holocene experiments under orbital forcing using the comprehensive global climate model CCSM3 (Community Climate System Model 3) (2011)
    PANGAEA
    In:  Supplement to: Varma, Vidya; Prange, Matthias; Merkel, Ute; Kleinen, Thomas; Lohmann, Gerrit; Pfeiffer, Madlene; Renssen, Hans; Wagner, Axel; Wagner, Sebastian; Schulz, Michael (2012): Holocene evolution of the Southern Hemisphere westerly winds in transient simulations with global climate models. Climate of the Past, 8(2), 391-402, https://doi.org/10.5194/cp-8-391-2012
    Details
    Publikationsdatum: 2023-10-28
    Beschreibung: The Southern Hemisphere Westerly Winds (SWW) have been suggested to exert a critical influence on global climate through wind-driven upwelling of deep water in the Southern Ocean and the potentially resulting atmospheric CO2 variations. The investigation of the temporal and spatial evolution of the SWW along with forcings and feedbacks remains a significant challenge in climate research. In this study, the evolution of the SWW under orbital forcing from the early Holocene (9 kyr BP) to pre-industrial modern times is examined with transient experiments using the comprehensive coupled global climate model CCSM3. Analyses of the model results suggest that the annual and seasonal mean SWW were subject to an overall strengthening and poleward shifting trend during the course of the early-to-late Holocene under the influence of orbital forcing, except for the austral spring season, where the SWW exhibited an opposite trend of shifting towards the equator.
    Schlagwort(e): Center for Marine Environmental Sciences; File format; File name; File size; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; MARUM; Uniform resource locator/link to file
    Materialart: Dataset
    Format: text/tab-separated-values, 20 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 13
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    Model output of the Greenland Ice Sheet to interglacial climate forcing: MIS 5e versus MIS 11 (2017)
    PANGAEA
    In:  Supplement to: Rachmayani, Rima; Prange, Matthias; Lunt, Daniel J; Stone, Emma J; Schulz, Michael (2017): Sensitivity of the Greenland Ice Sheet to Interglacial Climate Forcing: MIS 5e Versus MIS 11. Paleoceanography, 32(11), 1089-1101, https://doi.org/10.1002/2017PA003149
    Details
    Publikationsdatum: 2023-10-28
    Beschreibung: The Greenland Ice Sheet (GrIS) is thought to have contributed substantially to high global sea levels during the interglacials of Marine Isotope Stage (MIS) 5e and 11. Geological evidence suggests that the mass loss of the GrIS was greater during the peak interglacial of MIS 11 than MIS 5e, despite a weaker boreal summer insolation. We address this conundrum by using the three-dimensional thermomechanical ice-sheet model Glimmer forced by CCSM3 climate model output for MIS 5e and MIS 11 interglacial time slices. Our results suggest a stronger sensitivity of the GrIS to MIS 11 climate forcing than to MIS 5e forcing. Besides stronger greenhouse gas radiative forcing, the greater MIS 11 GrIS mass loss relative to MIS 5e is attributed to a larger oceanic heat transport towards high latitudes by a stronger Atlantic meridional overturning circulation. The vigorous MIS 11 ocean overturning, in turn, is related to a stronger wind-driven salt transport from low to high latitudes promoting North Atlantic Deep Water formation. The orbital insolation forcing, which causes the ocean current anomalies, is discussed.
    Schlagwort(e): Center for Marine Environmental Sciences; File format; File name; File size; Integrierte Analyse zwischeneiszeitlicher Klimadynamik; INTERDYNAMIK; MARUM; Uniform resource locator/link to file
    Materialart: Dataset
    Format: text/tab-separated-values, 32 data points
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 14
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    Glacial ENSO and Atlantic Meridional Overturning Circulation - Link to model results (2012)
    PANGAEA
    In:  Supplement to: Merkel, Ute; Prange, Matthias; Schulz, Michael (2010): ENSO variability and teleconnections during glacial climates. Quaternary Science Reviews, 29(1-2), 86-100, https://doi.org/10.1016/j.quascirev.2009.11.006
    Details
    Publikationsdatum: 2024-04-19
    Beschreibung: Numerical experiments using the general circulation model CCSM3 have been performed for glacial climates: Last Glacial Maximum (LGM), Heinrich Stadial 1 (HS1), Marine Isotope Stage 3 Stadial (MIS3-ST) and Marine Isotope Stage 3 Interstadial (MIS3-IST). As a reference, a control simulation for preindustrial climate (PI) has been performed. Details of the experiments are described in Merkel et al. (2010). The datasets contain timeseries from the last 100 years of each model simulation. For each experiment, we present: - annual mean timeseries of the maximum of the Atlantic Meridional Overturning Circulation between 30°N and 80°N and below 500 m. - monthly mean timeseries of sea surface temperature area-averaged over the Nino3-region (5°S-5°N, 150°W-90°W).
    Schlagwort(e): Center for Marine Environmental Sciences; MARUM
    Materialart: Dataset
    Format: application/zip, 2 datasets
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
  • 15
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    Hydroclimate proxy data from the eastern tropical Indian Ocean (2017)
    PANGAEA
    Details
    Publikationsdatum: 2024-04-22
    Beschreibung: Mg/Ca-based SST and thermocline temperatures with 1Sigma error at different sites, their difference (DeltaT), and the average DeltaT values for different periods with 95% confidence interval (CI). Also shown are hydrogen isotope (dD) values of n-C31 alkanes relative to the standard mean ocean water (per mil SMOW) with the 95% CI (LGM values are corrected for ice-volume), the C31 n-alkane concentrations in nanogram per gram sediment (ng g-1), the Carbon Preference Index (CPI27-33) as a measure of the degree of terrestrial organic matter degradation (higher CPI reflects less degraded plant waxes and vice versa), and their 1Sigma standard deviations (SD).
    Schlagwort(e): Center for Marine Environmental Sciences; MARUM
    Materialart: Dataset
    Format: application/zip, 6 datasets
    Standort Signatur Erwartet Verfügbarkeit
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    DATEN PANGAEA
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