Constraining modern day silicon cycling in Lake Baikal
Constraining the continental silicon cycle is a key requirement in attempts to understand both nutrient fluxes to the ocean and linkages between silicon and carbon cycling over different timescales. Silicon isotope data of dissolved silica (δ30SiDSi) are presented here from Lake Baikal and its catch...
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| Format: | Article |
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American Geophysical Union
2017
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| Online Access: | https://eprints.nottingham.ac.uk/41075/ |
| _version_ | 1848796191271157760 |
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| author | Panizzo, Virginia Swann, George E.A. Mackay, Anson W. Vologina, Elena Alleman, L. Andre, L. Pashley, Vanessa Horstwood, Matthew S.A. |
| author_facet | Panizzo, Virginia Swann, George E.A. Mackay, Anson W. Vologina, Elena Alleman, L. Andre, L. Pashley, Vanessa Horstwood, Matthew S.A. |
| author_sort | Panizzo, Virginia |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Constraining the continental silicon cycle is a key requirement in attempts to understand both nutrient fluxes to the ocean and linkages between silicon and carbon cycling over different timescales. Silicon isotope data of dissolved silica (δ30SiDSi) are presented here from Lake Baikal and its catchment in central Siberia. As well as being the world's oldest and voluminous lake, Lake Baikal lies within the seventh largest drainage basin in the world and exports significant amounts of freshwater into the Arctic Ocean. Data from river waters accounting for c. 92% of annual river inflow to the lake suggest no seasonal alteration or anthropogenic impact on river δ30SiDSi composition. The absence of a change in δ30SiDSi within the Selenga Delta, through which 62% of riverine flow passes, suggest a net balance between biogenic uptake and dissolution in this system. A key feature of this study is the use of δ30SiDSi to examine seasonal and spatial variations in DSi utilisation and export across the lake. Using an open system model against deep water δ30SiDSi values from the lake, we estimate that 20-24% of DSi entering Lake Baikal is exported into the sediment record. Whilst highlighting the impact that lakes may have upon the sequestration of continental DSi, mixed layer δ30SiDSi values from 2003 and 2013 show significant spatial variability in the magnitude of spring bloom nutrient utilisation with lower rates in the north relative to south basin. |
| first_indexed | 2025-11-14T19:44:03Z |
| format | Article |
| id | nottingham-41075 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:44:03Z |
| publishDate | 2017 |
| publisher | American Geophysical Union |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-410752020-05-04T18:38:28Z https://eprints.nottingham.ac.uk/41075/ Constraining modern day silicon cycling in Lake Baikal Panizzo, Virginia Swann, George E.A. Mackay, Anson W. Vologina, Elena Alleman, L. Andre, L. Pashley, Vanessa Horstwood, Matthew S.A. Constraining the continental silicon cycle is a key requirement in attempts to understand both nutrient fluxes to the ocean and linkages between silicon and carbon cycling over different timescales. Silicon isotope data of dissolved silica (δ30SiDSi) are presented here from Lake Baikal and its catchment in central Siberia. As well as being the world's oldest and voluminous lake, Lake Baikal lies within the seventh largest drainage basin in the world and exports significant amounts of freshwater into the Arctic Ocean. Data from river waters accounting for c. 92% of annual river inflow to the lake suggest no seasonal alteration or anthropogenic impact on river δ30SiDSi composition. The absence of a change in δ30SiDSi within the Selenga Delta, through which 62% of riverine flow passes, suggest a net balance between biogenic uptake and dissolution in this system. A key feature of this study is the use of δ30SiDSi to examine seasonal and spatial variations in DSi utilisation and export across the lake. Using an open system model against deep water δ30SiDSi values from the lake, we estimate that 20-24% of DSi entering Lake Baikal is exported into the sediment record. Whilst highlighting the impact that lakes may have upon the sequestration of continental DSi, mixed layer δ30SiDSi values from 2003 and 2013 show significant spatial variability in the magnitude of spring bloom nutrient utilisation with lower rates in the north relative to south basin. American Geophysical Union 2017-03-20 Article PeerReviewed Panizzo, Virginia, Swann, George E.A., Mackay, Anson W., Vologina, Elena, Alleman, L., Andre, L., Pashley, Vanessa and Horstwood, Matthew S.A. (2017) Constraining modern day silicon cycling in Lake Baikal. Global Biogeochemical Cycles, 31 (3). pp. 556-574. ISSN 1944-9224 Silicon isotopes; δ30SiDSi; Lake Baikal; Silicon export; Biogeochemical cycling; Diatoms http://onlinelibrary.wiley.com/doi/10.1002/2016GB005518/abstract doi:10.1002/2016GB005518 doi:10.1002/2016GB005518 |
| spellingShingle | Silicon isotopes; δ30SiDSi; Lake Baikal; Silicon export; Biogeochemical cycling; Diatoms Panizzo, Virginia Swann, George E.A. Mackay, Anson W. Vologina, Elena Alleman, L. Andre, L. Pashley, Vanessa Horstwood, Matthew S.A. Constraining modern day silicon cycling in Lake Baikal |
| title | Constraining modern day silicon cycling in Lake Baikal |
| title_full | Constraining modern day silicon cycling in Lake Baikal |
| title_fullStr | Constraining modern day silicon cycling in Lake Baikal |
| title_full_unstemmed | Constraining modern day silicon cycling in Lake Baikal |
| title_short | Constraining modern day silicon cycling in Lake Baikal |
| title_sort | constraining modern day silicon cycling in lake baikal |
| topic | Silicon isotopes; δ30SiDSi; Lake Baikal; Silicon export; Biogeochemical cycling; Diatoms |
| url | https://eprints.nottingham.ac.uk/41075/ https://eprints.nottingham.ac.uk/41075/ https://eprints.nottingham.ac.uk/41075/ |