Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium
The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediment...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Sun, Xiaole [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016transfer abstract |
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| Umfang: |
14 |
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| Übergeordnetes Werk: |
Enthalten in: Effects of methylphenidate on the behavior of male 5xFAD mice - Schneider, F. ELSEVIER, 2015transfer abstract, international journal of marine geology, geochemistry and geophysics, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:373 ; year:2016 ; day:1 ; month:03 ; pages:64-77 ; extent:14 |
| Links: |
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| DOI / URN: |
10.1016/j.margeo.2015.12.011 |
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ELV030138469 |
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| 520 | |a The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. | ||
| 520 | |a The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. | ||
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10.1016/j.margeo.2015.12.011 doi GBVA2016023000009.pica (DE-627)ELV030138469 (ELSEVIER)S0025-3227(15)30083-9 DE-627 ger DE-627 rakwb eng 550 550 DE-600 540 VZ 610 VZ 44.85 bkl Sun, Xiaole verfasserin aut Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium 2016transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. Higgins, John oth Turchyn, Alexandra V. oth Enthalten in Elsevier Science Schneider, F. ELSEVIER Effects of methylphenidate on the behavior of male 5xFAD mice 2015transfer abstract international journal of marine geology, geochemistry and geophysics Amsterdam [u.a.] (DE-627)ELV012725587 volume:373 year:2016 day:1 month:03 pages:64-77 extent:14 https://doi.org/10.1016/j.margeo.2015.12.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_22 GBV_ILN_39 GBV_ILN_40 GBV_ILN_50 GBV_ILN_72 GBV_ILN_657 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2032 GBV_ILN_2043 GBV_ILN_2563 44.85 Kardiologie Angiologie VZ AR 373 2016 1 0301 64-77 14 045F 550 |
| spelling |
10.1016/j.margeo.2015.12.011 doi GBVA2016023000009.pica (DE-627)ELV030138469 (ELSEVIER)S0025-3227(15)30083-9 DE-627 ger DE-627 rakwb eng 550 550 DE-600 540 VZ 610 VZ 44.85 bkl Sun, Xiaole verfasserin aut Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium 2016transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. Higgins, John oth Turchyn, Alexandra V. oth Enthalten in Elsevier Science Schneider, F. ELSEVIER Effects of methylphenidate on the behavior of male 5xFAD mice 2015transfer abstract international journal of marine geology, geochemistry and geophysics Amsterdam [u.a.] (DE-627)ELV012725587 volume:373 year:2016 day:1 month:03 pages:64-77 extent:14 https://doi.org/10.1016/j.margeo.2015.12.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_22 GBV_ILN_39 GBV_ILN_40 GBV_ILN_50 GBV_ILN_72 GBV_ILN_657 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2032 GBV_ILN_2043 GBV_ILN_2563 44.85 Kardiologie Angiologie VZ AR 373 2016 1 0301 64-77 14 045F 550 |
| allfields_unstemmed |
10.1016/j.margeo.2015.12.011 doi GBVA2016023000009.pica (DE-627)ELV030138469 (ELSEVIER)S0025-3227(15)30083-9 DE-627 ger DE-627 rakwb eng 550 550 DE-600 540 VZ 610 VZ 44.85 bkl Sun, Xiaole verfasserin aut Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium 2016transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. Higgins, John oth Turchyn, Alexandra V. oth Enthalten in Elsevier Science Schneider, F. ELSEVIER Effects of methylphenidate on the behavior of male 5xFAD mice 2015transfer abstract international journal of marine geology, geochemistry and geophysics Amsterdam [u.a.] (DE-627)ELV012725587 volume:373 year:2016 day:1 month:03 pages:64-77 extent:14 https://doi.org/10.1016/j.margeo.2015.12.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_22 GBV_ILN_39 GBV_ILN_40 GBV_ILN_50 GBV_ILN_72 GBV_ILN_657 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2032 GBV_ILN_2043 GBV_ILN_2563 44.85 Kardiologie Angiologie VZ AR 373 2016 1 0301 64-77 14 045F 550 |
| allfieldsGer |
10.1016/j.margeo.2015.12.011 doi GBVA2016023000009.pica (DE-627)ELV030138469 (ELSEVIER)S0025-3227(15)30083-9 DE-627 ger DE-627 rakwb eng 550 550 DE-600 540 VZ 610 VZ 44.85 bkl Sun, Xiaole verfasserin aut Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium 2016transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. Higgins, John oth Turchyn, Alexandra V. oth Enthalten in Elsevier Science Schneider, F. ELSEVIER Effects of methylphenidate on the behavior of male 5xFAD mice 2015transfer abstract international journal of marine geology, geochemistry and geophysics Amsterdam [u.a.] (DE-627)ELV012725587 volume:373 year:2016 day:1 month:03 pages:64-77 extent:14 https://doi.org/10.1016/j.margeo.2015.12.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_22 GBV_ILN_39 GBV_ILN_40 GBV_ILN_50 GBV_ILN_72 GBV_ILN_657 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2032 GBV_ILN_2043 GBV_ILN_2563 44.85 Kardiologie Angiologie VZ AR 373 2016 1 0301 64-77 14 045F 550 |
| allfieldsSound |
10.1016/j.margeo.2015.12.011 doi GBVA2016023000009.pica (DE-627)ELV030138469 (ELSEVIER)S0025-3227(15)30083-9 DE-627 ger DE-627 rakwb eng 550 550 DE-600 540 VZ 610 VZ 44.85 bkl Sun, Xiaole verfasserin aut Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium 2016transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. Higgins, John oth Turchyn, Alexandra V. oth Enthalten in Elsevier Science Schneider, F. ELSEVIER Effects of methylphenidate on the behavior of male 5xFAD mice 2015transfer abstract international journal of marine geology, geochemistry and geophysics Amsterdam [u.a.] (DE-627)ELV012725587 volume:373 year:2016 day:1 month:03 pages:64-77 extent:14 https://doi.org/10.1016/j.margeo.2015.12.011 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_21 GBV_ILN_22 GBV_ILN_39 GBV_ILN_40 GBV_ILN_50 GBV_ILN_72 GBV_ILN_657 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2010 GBV_ILN_2032 GBV_ILN_2043 GBV_ILN_2563 44.85 Kardiologie Angiologie VZ AR 373 2016 1 0301 64-77 14 045F 550 |
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Diffusive cation fluxes in deep-sea sediments and insight into the global geochemical cycles of calcium, magnesium, sodium and potassium |
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The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. |
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The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. |
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The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales. |
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The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The biogeochemical cycles of the ocean's major cations — calcium, magnesium, sodium and potassium — are linked to the ocean's alkalinity budget through terrestrial weathering and the subsequent formation and burial of calcium carbonate in the ocean. Chemical reactions within ocean sediments play a critical role in the biogeochemical cycles of the major cations, as indicated by geochemical gradients (both positive and negative) in the concentrations of these cations within the pore-fluid system (i.e. fluid trapped between sediment particles). Here we review the biogeochemical cycles of calcium, magnesium, and sodium, and provide new estimates of the diffusive fluxes of these cations within marine sediments to explore the importance of these sedimentary processes. We quantify these fluxes by compiling a global database of pore fluids from the various Ocean Drilling Programs (Deep Sea Drilling Program — DSDP, Ocean Drilling Program — ODP, International Ocean Drilling Program — IODP), comprising nearly 700 locations, which allows a wider geographic coverage and therefore better integrated flux estimates than previous work has allowed. The myriad of subseafloor chemical reactions that may influence the concentrations of the major cations in pore fluids include authigenic carbonate precipitation, carbonate dissolution, clay mineral formation, and ion exchange; as previous work has shown, we confirm that these integrated fluxes are globally significant. Because the DSDP/ODP/IODP cores begin sampling one meter below the sediment–water interface, additional studies of the processes within the top meter are needed to accurately calculate total cation fluxes across the sediment–water interface. Delineating the various processes that control the major cation chemistry of seawater over geologic time scales remains critical for understanding the operation of the CO2 silicate-weathering thermostat on geologic timescales.</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Higgins, John</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Turchyn, Alexandra V.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">Elsevier Science</subfield><subfield code="a">Schneider, F. 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