Andrew D. Jacobson
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View article: Corrigendum to “Carbonate dissolution fluxes in deep-sea sediments as determined from in situ porewater profiles in a transect across the saturation horizon” [Geochim. Cosmochim. Acta. 390 (2025) 145–159]
Corrigendum to “Carbonate dissolution fluxes in deep-sea sediments as determined from in situ porewater profiles in a transect across the saturation horizon” [Geochim. Cosmochim. Acta. 390 (2025) 145–159] Open
View article: Carbonate dissolution fluxes in deep-sea sediments as determined from in situ porewater profiles in a transect across the saturation horizon
Carbonate dissolution fluxes in deep-sea sediments as determined from in situ porewater profiles in a transect across the saturation horizon Open
International audience
View article: Microbial biogeography of the eastern Yucatán carbonate aquifer
Microbial biogeography of the eastern Yucatán carbonate aquifer Open
Constraining the spatial distribution of microorganisms and their ecological interactions is crucial for informing biogeochemistry. To that end, we explore horizontal and vertical patterns of microbial biogeography in the eastern Yucatán c…
View article: Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism
Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism Open
View article: Isotope systematics of subfossil, historical, and modern Nautilus macromphalus from New Caledonia
Isotope systematics of subfossil, historical, and modern Nautilus macromphalus from New Caledonia Open
Cephalopod carbonate geochemistry underpins studies ranging from Phanerozoic, global-scale change to outcrop-scale paleoecological reconstructions. Interpreting these data hinges on assumed similarity to model organisms, such as Nautilus ,…
View article: Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2
Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2 Open
View article: Supplemental Information: Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism
Supplemental Information: Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism Open
Supplementary data for Jones et al. (2023) in Nature Geoscience, including all newly measured geochemical data and coding scripts in R and MATLAB for modeling of osmium geochemical time series.
View article: Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2
Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2 Open
These data include bulk carbonate calcium, oxygen and carbon isotope data from Gubbio, Italy and the Angus Aristocrat Core from the Western Interior Seaway in Colorado, USA as well as foraminiferal calcium, oxygen and carbon isotope data f…
View article: Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2
Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2 Open
These data include bulk carbonate calcium, oxygen and carbon isotope data from Gubbio, Italy and the Angus Aristocrat Core from the Western Interior Seaway in Colorado, USA as well as foraminiferal calcium, oxygen and carbon isotope data f…
View article: $δ^{44/40}$Ca-$δ^{88/86}$Sr multi-proxy constrains primary origin of Marinoan cap carbonates
$δ^{44/40}$Ca-$δ^{88/86}$Sr multi-proxy constrains primary origin of Marinoan cap carbonates Open
The Neoproterozoic Earth experienced at least two global-scale glaciations termed Snowball Earth events. 'Cap carbonates' were widely deposited after the events, but controversy surrounds their origin. Here, we apply the novel $δ^{44/40}$C…
View article: Supplemental Information: Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism
Supplemental Information: Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism Open
Supplementary data for Jones et al. (2023) in Nature Geoscience, including all newly measured geochemical data and coding scripts in R and MATLAB for modeling of osmium geochemical time series.
View article: Large calcium isotope fractionations by zeolite minerals from Iceland
Large calcium isotope fractionations by zeolite minerals from Iceland Open
View article: Review of techniques, challenges, and new developments for calcium isotope ratio measurements
Review of techniques, challenges, and new developments for calcium isotope ratio measurements Open
View article: Assessing sedimentary detrital Pb isotopes as a dust tracer in the Pacific Ocean
Assessing sedimentary detrital Pb isotopes as a dust tracer in the Pacific Ocean Open
Dataset in Support of Manuscript "Assessing sedimentary detrital Pb isotopes as a dust tracer in the Pacific Ocean", in review at Paleoceanography and Paleoclimatology. Data includes Pb isotopes of detrital fractions from ocean sediments a…
View article: Assessing sedimentary detrital Pb isotopes as a dust tracer in the Pacific Ocean
Assessing sedimentary detrital Pb isotopes as a dust tracer in the Pacific Ocean Open
Dataset in Support of Manuscript "Assessing sedimentary detrital Pb isotopes as a dust tracer in the Pacific Ocean", in review at Paleoceanography and Paleoclimatology. Data includes Pb isotopes of detrital fractions from ocean sediments a…
View article: Application of the δ<sup>44/40</sup>Ca – δ<sup>88/86</sup>Sr multi-proxy to the Shuram Carbon Isotope Excursion
Application of the δ<sup>44/40</sup>Ca – δ<sup>88/86</sup>Sr multi-proxy to the Shuram Carbon Isotope Excursion Open
View article: Bulk carbonate and foraminiferal calcium isotope ratios indicate calcification stress preceded Oceanic Anoxic Event 2
Bulk carbonate and foraminiferal calcium isotope ratios indicate calcification stress preceded Oceanic Anoxic Event 2 Open
View article: Calcium Isotope Response of Morozovella spp. To Paleocene-Eocene Ocean Acidification
Calcium Isotope Response of Morozovella spp. To Paleocene-Eocene Ocean Acidification Open
View article: Calcium isotope evidence for environmental variability before and across the Cretaceous-Paleogene mass extinction
Calcium isotope evidence for environmental variability before and across the Cretaceous-Paleogene mass extinction Open
Carbon dioxide release during Deccan Traps volcanism and the Chicxulub impact likely contributed to the Cretaceous-Paleogene (K-Pg) mass extinction; however, the intensity and duration of CO2 input differed between the two events. Large an…
View article: Assessing the Contributions of Atmospheric/Meteoric Water and Sea Ice Meltwater and Their Influences on Geochemical Properties in Estuaries of the Canadian Arctic Archipelago
Assessing the Contributions of Atmospheric/Meteoric Water and Sea Ice Meltwater and Their Influences on Geochemical Properties in Estuaries of the Canadian Arctic Archipelago Open
Salinity and stable oxygen isotope (δ18O) data collected from eight estuaries distributed throughout the Canadian Arctic Archipelago were used to apportion contributions from local meteoric water (MW) and sea ice meltwater (SIM) sources du…
View article: Watershed slope as a predictor of fluvial dissolved organic matter and nitrate concentrations across geographical space and catchment size in the Arctic
Watershed slope as a predictor of fluvial dissolved organic matter and nitrate concentrations across geographical space and catchment size in the Arctic Open
Understanding linkages between river chemistry and biological production in arctic coastal waters requires improved estimates of riverine nutrient export. Here we present the results of a synthesis effort focusing on relationships between …
View article: Dissolved Carbon Dynamics in Meltwaters From the Russell Glacier, Greenland Ice Sheet
Dissolved Carbon Dynamics in Meltwaters From the Russell Glacier, Greenland Ice Sheet Open
Melting of the Greenland Ice Sheet (GrIS) has accelerated in recent decades. Given the close association between the water and carbon (C) cycles, melting of the GrIS may also drive local and global C cycle feedback. However, few studies ha…
View article: Plant Water δD and δ<sup>18</sup>O of Tundra Species from West Greenland
Plant Water δD and δ<sup>18</sup>O of Tundra Species from West Greenland Open
Stable hydrogen and oxygen isotope ratios (δD and δ18O) of archived plant tissues can be used in paleoenvironmental reconstructions, assuming a well-grounded understanding of the environmental drivers of stable isotope variation in plant w…
View article: Seasonality of dissolved nitrogen from spring melt to fall freezeup in Alaskan Arctic tundra and mountain streams
Seasonality of dissolved nitrogen from spring melt to fall freezeup in Alaskan Arctic tundra and mountain streams Open
Predicting the response of dissolved nitrogen export from Arctic watersheds to climate change requires an improved understanding of seasonal nitrogen dynamics. Recent studies of Arctic rivers emphasize the importance of spring thaw as a ti…
View article: Massive volcanism, evaporite deposition, and the chemical evolution of the Early Cretaceous ocean
Massive volcanism, evaporite deposition, and the chemical evolution of the Early Cretaceous ocean Open
Early Cretaceous (145–100 Ma) rocks record a ∼5‰ negative shift in the sulfur isotope composition of marine sulfate, the largest shift observed over the past 130 m.y. Two hypotheses have been proposed to explain this shift: (1) massive eva…
View article: Silicate versus carbonate weathering in Iceland: New insights from Ca isotopes
Silicate versus carbonate weathering in Iceland: New insights from Ca isotopes Open
) to trace sources of Ca in Icelandic rivers. We report elemental and Ca isotope data for rivers, high- and low-temperature groundwater, basalt, hydrothermal calcite (including Iceland Spar), and stilbite and heulandite, which are two type…
View article: Ca isotope stratigraphy across the Cenomanian–Turonian OAE 2: Links between volcanism, seawater geochemistry, and the carbonate fractionation factor
Ca isotope stratigraphy across the Cenomanian–Turonian OAE 2: Links between volcanism, seawater geochemistry, and the carbonate fractionation factor Open
View article: Seasonally varying contributions to urban CO2 in the Chicago, Illinois, USA region: Insights from a high-resolution CO2 concentration and δ13C record
Seasonally varying contributions to urban CO2 in the Chicago, Illinois, USA region: Insights from a high-resolution CO2 concentration and δ13C record Open
Understanding urban carbon cycling is essential given that cities sustain 54% of the global population and contribute 70% of anthropogenic CO2 emissions. When combined with CO2 concentration measurements ([CO2]), stable carbon isotope anal…