de.pangaea.dataset996254 und de.pangaea.dataset996263 dataset PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact 2026-07-31T08:36:31Z https://doi.pangaea.de/10.1594/PANGAEA.996254 <gco:CharacterString>Depth‑resolved CHI hydrographic states and trend dynamics for core DA12‑11/2‑ST1‑GC01</gco:CharacterString> 2026-07-31T08:36:04 publication Ukpabi, Ndubuisi
edgar2005ng@gmail.com
https://orcid.org/0000-0002-8535-9041 information author Seidenkrantz, Marit-Solveig
mss@geo.au.dk
https://orcid.org/0000-0002-1973-5969 information author PANGAEA
info@pangaea.de
https://www.pangaea.de/ information publisher tableDigital This dataset summarizes the classified hydrographic states, percentile thresholds, and trend behaviors derived from CHI_sx (state index) and CHI z scores across the DA12 11/2 ST1 GC01 Holocene sequence. Each depth interval is assigned to a hydrographic state class (Low, Normal, or High), a percentile category (including Q10 and Q90 extremes), and a trend designation reflecting warming, cooling, or alternating/neutral conditions based on rolling slope analysis. These classifications are paired with species level coccolithophore percentages and ecozone assignments, enabling interpretation of ecological community structure within its hydrographic context. The table provides a categorical, decision ready framework for identifying hydrographic anomalies, transitions between Atlantic dominated and Polar influenced surface waters, and intervals of ecological stability or directional change. By combining state, trend, and ecozone information, this table offers a synthesized view of Holocene surface water dynamics that complements the quantitative CHI metrics and supports high resolution paleoenvironmental reconstruction. completed Ukpabi, Ndubuisi
edgar2005ng@gmail.com
https://orcid.org/0000-0002-8535-9041 information principalInvestigator ecological regime shifts ecozones Holocene hydrography hydrographic reconstruction hydrographic state classification Iceland Basin Micropaleontology paleoceanographic interpretation Polar Water surface water variability theme <gco:CharacterString>PANGAEA Keyword List</gco:CharacterString> 1995-01-01 creation PANGAEA
info@pangaea.de
https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation -20.70273 -20.70273 61.60893 61.60893 2025-09-12T14:20:00 2025-09-12T14:20:00 0.005 4.18 DEPTH, sediment/rock physicalMeasurement m m Depth, top/min physicalMeasurement m m Depth, bottom/max physicalMeasurement m m AGE physicalMeasurement ka BP ka BP Hyperbolic tangent thematicClassification tanh scaled state index CHI_sx Z-score thematicClassification CHI z-score Class thematicClassification Hydrographic state class Percentile threshold, description thematicClassification Percentile flags (Low, Normal, High) Trend class thematicClassification Warming, Cooling, Alternating Trend arrow thematicClassification State–trend combination thematicClassification Calcidiscus leptoporus physicalMeasurement % % Coccolithus pelagicus physicalMeasurement % % Emiliania huxleyi physicalMeasurement % % Gephyrocapsa spp. physicalMeasurement % % Helicosphaera carteri physicalMeasurement % % Pontosphaera discopora physicalMeasurement % % Pontosphaera japonica physicalMeasurement % % Syracosphaera pulchra physicalMeasurement % % Umbilicosphaera spp. physicalMeasurement % % Braarudosphaera bigelowii physicalMeasurement % % Ecozone thematicClassification Zones 1–5 text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.996254?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: DA12-11/2-GC01 (G1) * LATITUDE: 61.608930 * LONGITUDE: -20.702730 * DATE/TIME: 2025-09-12T14:20:00 * ELEVATION: -2120.0 m * LOCATION: Iceland Basin * CAMPAIGN: Dana12-11 * BASIS: Dana (1981) * METHOD/DEVICE: Gravity corer 2025-09-12T14:20:00 Related to <gco:CharacterString>Holocene hydrography of the Iceland Basin from coccolith ecological contrasts: A multi‑axis index for salinity and stratification</gco:CharacterString> Ukpabi, Ndubuisi
edgar2005ng@gmail.com
https://orcid.org/0000-0002-8535-9041 information author Seidenkrantz, Marit-Solveig
mss@geo.au.dk
https://orcid.org/0000-0002-1973-5969 information author documentHardcopy Marine Micropaleontology