Stable oxygen and carbon isotopes in planktonic foraminifera Neogloboquadrina pachyderma in the Arctic Ocean: An overview of published and new surface-sediment data

Wei, Xiao; Wang, Rujian; Polyak, Leonid; Астахов, А. С.; Cheng, Xiao

doi:10.1016/j.margeo.2014.03.024

Cited by 24 publications

(22 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within these limitations, our data may serve as a first useful d 13 C DIC baseline due to a total lack of further data from the Arctic Ocean water column. For example, high d 13 C in planktic foraminifers from surface sediments in the Canada Basin [51] may be explained by the import of biologically mediated d 13 C DIC from the shelves, while pronounced low surface-sediment planktic d 13 C along the shelf break of the Chuckchi and Beaufort seas [51] may be related to low d 13 C DIC modified by air-sea exchange. Despite remaining substantial uncertainties with the application of surface-sediment stable isotope data to a more distant past, modern d 13 C DIC and d 18 O data from the water column constitute an essential prerequisite for paleoclimatic reconstructions.…”

Section: Summary and Future Directionsmentioning

confidence: 99%

“…For paleoclimate reconstructions, stable isotopes of carbonate shells preserved within the sediments provide a powerful tool (e.g., [46]). While the factors controlling oxygen isotopes (d 18 O) in carbonate shells in the Arctic are reasonably well understood (e.g., [51]), this is not the case for stable carbon isotopes (d 13 C). Furthermore, we have only a rudimentary understanding of the complex interplay of biological and physical-chemical factors influencing the d 13 C DIC that is recorded in the d 13 C of carbonate shells (e.g., [27,43]).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A baseline for the vertical distribution of the stable carbon isotopes of dissolved inorganic carbon (δ13CDIC) in the Arctic Ocean

Bauch

Polyak

Ortiz

2015

Arktos

View full text Add to dashboard Cite

Stable carbon isotopes of dissolved inorganic carbon (d 13 C DIC ) in the ocean are generally not well understood as they are governed by a complex interplay of biological processes and air-sea exchange. In the Arctic Ocean, d 13 C DIC values are prone to change in the near future with rapidly changing climate conditions. This study provides a baseline to assess the d 13 C DIC of the Arctic Ocean with a focus on upper to intermediate waters (to *500 m). Measured d 13 C DIC values in the Arctic Ocean range from *-0.6 to ?2.2 %. In the Eurasian Basin, the d 13 C DIC values lie between *1 and 1.5 % and exhibit little variation within the upper layers. In the Canada Basin, d 13 C DIC values reach 2 % in the surface layer, with lowest values of *-0.6 % found at *200 m water depth. At greater depth, d 13 C DIC values range from *1 to 1.5 % within both basins. In the Canada Basin, nutrient levels are higher than in the Eurasian Basin and associated variations in d 13 C DIC are clearly related to biological processes. However, low d 13 C DIC values in the Canada Basin are also strongly influenced by non-equilibrium air-sea exchange processes. The different d 13 C DIC patterns between the Canada Basin and the Eurasian Basin appear to be linked to differences in transport processes within the Arctic Ocean halocline. The upper layers in the Canada basins have direct contributions of waters from the Laptev, East Siberian and Chukchi shelves, which contain elevated fractions of river waters and sea-ice related brines, whereas their counterparts, in the Eurasian Basin, are mostly formed by halocline waters from the Barents and Kara seas. River waters have low d 13 C DIC of *-8 % on average, but in the Arctic basins this signal is mostly lost and d 13 C DIC values show only a weak correlation to river water fractions contained in the water mass. No relation between d 13 C DIC and sea-ice related brine contribution is apparent.

show abstract

Section: Summary and Future Directionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A baseline for the vertical distribution of the stable carbon isotopes of dissolved inorganic carbon (δ13CDIC) in the Arctic Ocean

Bauch

Polyak

Ortiz

2015

Arktos

View full text Add to dashboard Cite

show abstract

“…Accordingly, the pattern of decreasing near-surface salinities from the northern Barents Sea margin to the Arctic Ocean interior is documented in oxygen isotope values (d 18 O) of planktic foraminifers from sediment surface samples [78]. A recent study by Xiao et al [97] confirmed this result and the earlier hypothesis that higher d…”

Section: Detection Of Freshwater Events In Arctic Historymentioning

confidence: 57%

“…Evidence comes from the carbon isotope values (d 13 C) of living planktic foraminifers from the freshwater-rich nearsurface layer and specimens from interior Arctic sediment surface samples which are all unusually high (up to 1.5 %; [63,78,92,97] [78,97]. The high values found in living and Late Quaternary planktic foraminifers can thus be explained by an input of low- 13 C atmospheric CO 2 that is balanced by the fixation of 12 C through bioproduction.…”

Section: Detection Of Freshwater Events In Arctic Historymentioning

confidence: 99%

The role of Arctic Ocean freshwater during the past 200 ky

Spielhagen

Bauch

2015

Arktos

View full text Add to dashboard Cite

As part of the hydrologic cycle, the freshwater system plays a pivotal role for the Arctic Ocean. It maintains the strong stratification in the upper waters and fosters the formation of sea ice on the circum-Arctic shelves from where the ice is being exported toward Fram Strait and into the Nordic Seas. Recent projections of climate change under the greenhouse effect predict severe changes for the hydrologic cycle in the Arctic. This manuscript reviews the current knowledge of past changes in freshwater fluxes to and from the Arctic Ocean and their possible impact on ocean circulation and climate outside the Arctic during the past 200,000 years. It becomes evident that abrupt and large-volume discharges into the Arctic Ocean during times of major climate transitions were capable of disturbing the global ocean circulation and triggering further climate change, e.g., at the onset of the Younger Dryas cold event. During sea-level rise in the Holocene, a connection between the increasing areas available for sea ice formation, the position of the ice margin in the ice export area (the Fram Strait) and the deepwater convection in the Greenland Sea is suggested. Further work is needed to investigate the effects of other catastrophic freshwater discharges from previously ice-dammed lakes in northern Eurasia during the Weichselian and Saalian glaciations. Events like the 8.2 ka and the Younger Dryas, which were associated with flooding and routing of glacial meltwaters and had a significant effect on climate, could serve as a template to better validate the impact of similar occurrences in the past. To date, the actual influence of the earlier events on ocean circulation and climate remains elusive.

show abstract

“…The stable carbon isotopes of planktic foraminiferal tests have been used for paleooceanographic reconstructions [1][2][3][4][5][6][7][8][9]. A number of factors have been proposed to have control over the δ 13 C values of the calcareous foraminiferal shells such as, vertical movement of foraminifera during their life cycles, changes in symbiont photosynthetic and respiratory rates, productivity and/or food/nutrient availability [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dependence of the Stable Carbon Isotope of Planktic Foraminiferal Species <i>Globigerina Bulloides</i> on Food Supply in the Indian Ocean Sector of Southern Ocean

Khare¹

2017

View full text Add to dashboard Cite

Abstract. Twenty one surface sediment samples (comprising Peterson Grab, Piston, Gravity and Spade core top samples) were collected along a north-south transect (between 9.69°N and 55.01°S latitude and 80°E and 40°E longitude). These samples were used to study δ 13 C values in the calcareous shells of planktic foraminiferal species Globigerina bulloides and the variations were compared with the latitudinal changes in the overall size of the planktic foraminiferal population obtained from earlier published data along similar transect. The results establish an interdependence of δ 13 C values of planktic species Globigerina bulloides and the overall size of planktic foraminiferal population. The region where the δ 13 C values of planktic species Globigerina bulloides decrease the overall size of planktic foraminiferal population increases. Such a distinct pattern may be ascribed to the generation of food/nutritive material. It is suggested that similar studies to understand variations in δ 13 C values in foraminiferal shells and its population size in geographically distinct latitudinal corridors covering distinct marine regime of physico-chemical conditions be undertaken to further strengthen the argument proposed in the present study.

show abstract

Stable oxygen and carbon isotopes in planktonic foraminifera Neogloboquadrina pachyderma in the Arctic Ocean: An overview of published and new surface-sediment data

Cited by 24 publications

References 84 publications

A baseline for the vertical distribution of the stable carbon isotopes of dissolved inorganic carbon (δ13CDIC) in the Arctic Ocean

A baseline for the vertical distribution of the stable carbon isotopes of dissolved inorganic carbon (δ13CDIC) in the Arctic Ocean

The role of Arctic Ocean freshwater during the past 200 ky

Dependence of the Stable Carbon Isotope of Planktic Foraminiferal Species <i>Globigerina Bulloides</i> on Food Supply in the Indian Ocean Sector of Southern Ocean

Contact Info

Product

Resources

About