PANGAEA_996254
Depth‑resolved CHI hydrographic states and trend dynamics for core DA12‑11/2‑ST1‑GC01
Ukpabi, Ndubuisi; Seidenkrantz, Marit-Solveig
Depth‑resolved CHI hydrographic states and trend dynamics for core DA12‑11/2‑ST1‑GC01
2026-07-31
PANGAEA
Dataset
https://doi.pangaea.de/10.1594/PANGAEA.996254
Investigator
Ndubuisi
Ukpabi
edgar2005ng@gmail.com
Earth Science
DEPTH, sediment/rock
Depth, top/min
Depth, bottom/max
AGE
Hyperbolic tangent
Z-score
Class
Percentile threshold, description
Trend class
Trend arrow
State–trend combination
Calcidiscus leptoporus
Coccolithus pelagicus
Emiliania huxleyi
Gephyrocapsa spp.
Helicosphaera carteri
Pontosphaera discopora
Pontosphaera japonica
Syracosphaera pulchra
Umbilicosphaera spp.
Braarudosphaera bigelowii
Ecozone
geoscientificInformation
DA12-11/2-GC01
Dana12-11
ecological regime shifts
ecozones
G1
Gravity corer
Holocene hydrography
hydrographic reconstruction
hydrographic state classification
Iceland Basin
Micropaleontology
paleoceanographic interpretation
Polar Water
surface water variability
Dana (1981)
2025-09-12
2025-09-12
Complete
61.60893
61.60893
-20.70273
-20.70273
0.005 m (DEPTH, sediment/rock)
4.18 m (DEPTH, sediment/rock)
unrestricted
CC-BY-4.0: Creative Commons Attribution 4.0 International
English
PANGAEA
Data Publisher for Earth & Environmental Science
https://www.pangaea.de/
Data Center Contact
Michael
Diepenbroek
info@pangaea.de
Leobener Str.
Bremen
Bremen
28359
Germany
online
1600 data points
text/tab-separated-values
Ukpabi, Ndubuisi; Seidenkrantz, Marit-Solveig (in press): Holocene hydrography of the Iceland Basin from coccolith ecological contrasts: A multi‑axis index for salinity and stratification. Marine Micropaleontology
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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.996254"!
http://en.wikipedia.org/wiki/Kyr
AGE
http://www.marinespecies.org/aphia.php?p=taxdetails&id=115104
Emiliania huxleyi
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235823
Gephyrocapsa spp.
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235857
Umbilicosphaera spp.
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235922
Braarudosphaera bigelowii
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235923
Calcidiscus leptoporus
http://www.marinespecies.org/aphia.php?p=taxdetails&id=235979
Syracosphaera pulchra
http://www.marinespecies.org/aphia.php?p=taxdetails&id=615435
Helicosphaera carteri
https://dana.dtu.dk/en/historien-om-dana
Dana (1981)
PANGAEA_996263
DIF
9.4
2026-07-31
2026-07-31