Click Here for Full Article
[1] Observations of silicic acid and nitrate along the lower branch of the global conveyor belt circulation show that silicic acid accumulation by diatom opal dissolution occurs at 6.4 times the rate of nitrate addition by organic matter remineralization. The export of opal and organic matter from t...
Other Authors: | |
---|---|
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.7950 http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.143.7950 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.143.7950 2023-05-15T17:33:32+02:00 Click Here for Full Article The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.7950 http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.7950 http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf text ftciteseerx 2016-01-07T15:03:24Z [1] Observations of silicic acid and nitrate along the lower branch of the global conveyor belt circulation show that silicic acid accumulation by diatom opal dissolution occurs at 6.4 times the rate of nitrate addition by organic matter remineralization. The export of opal and organic matter from the surface ocean occurs at a Si:N mole ratio that is much smaller than this almost everywhere (cf. Sarmiento et al., 2004). The preferential increase of silicic acid over nitrate as the deep circulation progresses from the North Atlantic to the North Pacific is generally interpreted as requiring deep dissolution of opal together with shallow remineralization of organic matter (Broecker, 1991). However, Sarmiento et al. (2004) showed that the primary reason for the low silicic acid concentration of the upper ocean is that the waters feeding the main thermocline from the surface Southern Ocean are depleted in silicic acid relative to nitrate. By implication, the same Southern Ocean processes that deplete the silicic acid in the surface Southern Ocean must also be responsible for the enhanced silicic acid concentration of the deep ocean. We use observations and results from an updated version of the adjoint model of Schlitzer (2000) to confirm that this indeed the case. Text North Atlantic Southern Ocean Unknown Pacific Sarmiento ENVELOPE(-68.000,-68.000,-72.000,-72.000) Southern Ocean |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
[1] Observations of silicic acid and nitrate along the lower branch of the global conveyor belt circulation show that silicic acid accumulation by diatom opal dissolution occurs at 6.4 times the rate of nitrate addition by organic matter remineralization. The export of opal and organic matter from the surface ocean occurs at a Si:N mole ratio that is much smaller than this almost everywhere (cf. Sarmiento et al., 2004). The preferential increase of silicic acid over nitrate as the deep circulation progresses from the North Atlantic to the North Pacific is generally interpreted as requiring deep dissolution of opal together with shallow remineralization of organic matter (Broecker, 1991). However, Sarmiento et al. (2004) showed that the primary reason for the low silicic acid concentration of the upper ocean is that the waters feeding the main thermocline from the surface Southern Ocean are depleted in silicic acid relative to nitrate. By implication, the same Southern Ocean processes that deplete the silicic acid in the surface Southern Ocean must also be responsible for the enhanced silicic acid concentration of the deep ocean. We use observations and results from an updated version of the adjoint model of Schlitzer (2000) to confirm that this indeed the case. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Click Here for Full Article |
spellingShingle |
Click Here for Full Article |
title_short |
Click Here for Full Article |
title_full |
Click Here for Full Article |
title_fullStr |
Click Here for Full Article |
title_full_unstemmed |
Click Here for Full Article |
title_sort |
click here for full article |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.7950 http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf |
long_lat |
ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
geographic |
Pacific Sarmiento Southern Ocean |
geographic_facet |
Pacific Sarmiento Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.7950 http://www.gfdl.noaa.gov/reference/bibliography/2007/jls0701.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766132075788763136 |