Automated Author ProfileVance, Derek
Vance, Derek
Current S-Index
Sum of Dataset Indices for all datasets
Average Dataset Index per Dataset
Average Dataset Index per dataset
Total Datasets
Total datasets for this author
Average FAIR Score
Average FAIR Score per dataset
Total Citations
Total citations to the author's datasets
Total Mentions
Total mentions of the author's datasets
S-Index Interpretation
The S-Index (Sharing Index) is a comprehensive metric that represents the cumulative impact of all your datasets. It is calculated as the sum of Dataset Index scores across all your claimed datasets.
What it means:
- A higher S-index indicates greater overall impact of your datasets relative to typical datasets in their fields of research
- The S-Index grows as you add more datasets or as existing datasets gain more citations and mentions
- It provides a single number to track your research data impact over time
Current S-Index: 53.9 (sum of 41 datasets Dataset Index scores)
More information here.
S-Index Over Time
Cumulative Citations Over Time
Cumulative Mentions Over Time
Datasets
The Paleocene Eocene Thermal Maximum (PETM) represents a major carbon cycle and climate perturbation that was associated with ocean de-oxygenation, in a qualitatively similar manner to the more extensive Mesozoic Oceanic Anoxic Events. Although indicators of ocean de-oxygenation are common for the PETM, and linked to biotic turnover, the global extent and temporal progression of de-oxygenation is poorly constrained. Here we present carbonate associated uranium isotope (δ238UCAU) data to reconstruct the evolution of global seawater δ238U, and hence quantify the expansion of anoxic U sinks on a global scale.This dataset contains trace element and U isotope data (238U/235U, expressed as δ238U) for the carbonate fraction of three well studied PETM sites; Site 865 (equatorial Pacific), Site 401 (Bay of Biscay) and Site 690 (Walvis Ridge). Samples are carbonate rich pelagic sediments, with a mixture of carbonate nannofossils, foraminifera and detrital clays. Bulk samples were selectively leached for the carbonate fraction using 1M ammonium acetate (pH 5) at room temperature for 24hrs. Trace element concentrations were measured on a Thermo-Finnigan Element XR and reported normalized to Ca. Uranium was purified by ion exchange chromatography and isotopes measured on a Thermo-Finnigan Neptune Plus. Uranium isotopes are reported as δ238U, where CRM-145 = 0‰.Sites 690 and 401 both show elevated U/Ca and δ238UCAU during the PETM and recovery interval, indicative of locally reducing conditions. By contrast, Site 865 records the global seawater δ238U and shows no resolvable change across the PETM. The lack of resolvable perturbation to the U-cycle during the event suggests a limited expansion of seafloor anoxia on a global scale. In the related publication we use this result, in conjunction with a biogeochemical model, to set an upper limit on the extent of global seafloor de-oxygenation. The model suggests that the new U isotope data, whilst also being consistent with plausible carbon emission scenarios and observations of carbon cycle recovery, permit a maximum ~10-fold expansion of anoxia to cover <2% of seafloor area.
Authors
- Clarkson, Matthew O ;
- Lenton, Timothy M ;
- Andersen, Morten B ;
- Bagard, Marie-laure ;
- Dickson, Alexander J ;
- Vance, Derek
No description available
Authors
- Hasenfratz, Adam P ;
- Jaccard, Samuel L ;
- Martínez‐García, Alfredo ;
- Sigman, Daniel M ;
- Hodell, David A ;
- Vance, Derek ;
- Bernasconi, Stefano M ;
- Kleiven, Helga F ;
- Haumann, F Alexander ;
- Haug, Gerald H
No description available
Authors
- Hasenfratz, Adam P ;
- Jaccard, Samuel L ;
- Martínez‐García, Alfredo ;
- Sigman, Daniel M ;
- Hodell, David A ;
- Vance, Derek ;
- Bernasconi, Stefano M ;
- Kleiven, Helga F ;
- Haumann, F Alexander ;
- Haug, Gerald H
No description available
Authors
- Hasenfratz, Adam P ;
- Jaccard, Samuel L ;
- Martínez‐García, Alfredo ;
- Sigman, Daniel M ;
- Hodell, David A ;
- Vance, Derek ;
- Bernasconi, Stefano M ;
- Kleiven, Helga F ;
- Haumann, F Alexander ;
- Haug, Gerald H
No description available
Authors
- Vance, Derek ;
- Scrivner, Adam E ;
- Beney, Patricia ;
- Staubwasser, Michael ;
- Henderson, Gideon M ;
- Slowey, Niall C
No description available
Authors
- Gutjahr, Marcus ;
- Vance, Derek ;
- Hoffmann, Dirk L ;
- Hillenbrand, Claus-Dieter ;
- Foster, Gavin L ;
- Rae, James W B ;
- Kuhn, Gerhard
No description available
Authors
- Gutjahr, Marcus ;
- Vance, Derek ;
- Hoffmann, Dirk L ;
- Hillenbrand, Claus-Dieter ;
- Foster, Gavin L ;
- Rae, James W B ;
- Kuhn, Gerhard
No description available
Authors
- Gutjahr, Marcus ;
- Vance, Derek ;
- Hoffmann, Dirk L ;
- Hillenbrand, Claus-Dieter ;
- Foster, Gavin L ;
- Rae, James W B ;
- Kuhn, Gerhard
No description available
Authors
- Robinson, Stuart A ;
- Vance, Derek