Pelagic phosphorus accumulation in the Pacific Ocean
Fuente:
PANGAEA
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Dataset Open Access |
| Lingua: | en |
| Pubblicazione: |
PANGAEA
1988
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1867169499520696320 |
|---|---|
| author | Moody, Judith Chaboudy, Louis R Worsley, Thomas R |
| author_facet | Moody, Judith Chaboudy, Louis R Worsley, Thomas R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | As a limiting nutrient to marine life, phosphorus (P) is an effective tracer of today's marine productivity. The distribution of P in marine sediments likewise tracks the history of marine productivity because of its relative insolubility in seawater. CaCO3, biogenic opal, terrigenous sediment, and total P have been measured in cores from nine Pacific sites (Deep Sea Drilling Project (DSDP) 65, 66, 310, 77, 62, 572, 463, 586, and GPC-3) and one subantarctic (DSDP 266) site. These sites were specifically chosen to provide information on biota burial flux changes with time for sedimentary sinks that represent key oceanographic variables, i.e., rate of upwelling, water depth, and carbonate dissolution gradient. The accumulation rates of these components for the last 10 Ma were then calculated from determined core age versus depth plots, core bulk density, and porosity data. The accumulation of P weakly correlates with that of CaCO3, moderately with that of total sediment, and very strongly with carbonate-free accumulation. Two prominent peaks for all components occur at 2-3 Ma and 5-6 Ma, and record the chemical loading of dissolved CaCO3, SiO2, and P from glacially emergent continental shelves. These results indicate that continental shelf phosphorites form during interglacially high sea levels and correspond to low deep-sea P accumulation rates, whereas glacially lowered sea levels allow for shelf bypassing and greater deep-sea P accumulation rates. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_726936 |
| institution | PANGAEA |
| language | en |
| publishDate | 1988 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Pelagic phosphorus accumulation in the Pacific Ocean Moody, Judith Chaboudy, Louis R Worsley, Thomas R 28-266; 32-310; 62-463; 7-62A; 7-65; 7-66A; 85-572; 89-586; 9-77; Antarctic Ocean/RIDGE; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; GPC-3; Leg28; Leg32; Leg62; Leg7; Leg85; Leg89; Leg9; LL44-GPC-3; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/HILL; North Pacific/RIDGE; North Pacific/SEAMOUNT; North Pacific Ocean; PC; Piston corer; Silicon Cycling in the World Ocean; SINOPS; South Pacific Ocean As a limiting nutrient to marine life, phosphorus (P) is an effective tracer of today's marine productivity. The distribution of P in marine sediments likewise tracks the history of marine productivity because of its relative insolubility in seawater. CaCO3, biogenic opal, terrigenous sediment, and total P have been measured in cores from nine Pacific sites (Deep Sea Drilling Project (DSDP) 65, 66, 310, 77, 62, 572, 463, 586, and GPC-3) and one subantarctic (DSDP 266) site. These sites were specifically chosen to provide information on biota burial flux changes with time for sedimentary sinks that represent key oceanographic variables, i.e., rate of upwelling, water depth, and carbonate dissolution gradient. The accumulation rates of these components for the last 10 Ma were then calculated from determined core age versus depth plots, core bulk density, and porosity data. The accumulation of P weakly correlates with that of CaCO3, moderately with that of total sediment, and very strongly with carbonate-free accumulation. Two prominent peaks for all components occur at 2-3 Ma and 5-6 Ma, and record the chemical loading of dissolved CaCO3, SiO2, and P from glacially emergent continental shelves. These results indicate that continental shelf phosphorites form during interglacially high sea levels and correspond to low deep-sea P accumulation rates, whereas glacially lowered sea levels allow for shelf bypassing and greater deep-sea P accumulation rates. |
| title | Pelagic phosphorus accumulation in the Pacific Ocean |
| topic | 28-266; 32-310; 62-463; 7-62A; 7-65; 7-66A; 85-572; 89-586; 9-77; Antarctic Ocean/RIDGE; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; GPC-3; Leg28; Leg32; Leg62; Leg7; Leg85; Leg89; Leg9; LL44-GPC-3; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/HILL; North Pacific/RIDGE; North Pacific/SEAMOUNT; North Pacific Ocean; PC; Piston corer; Silicon Cycling in the World Ocean; SINOPS; South Pacific Ocean |
| url | https://doi.org/10.1594/PANGAEA.726936 |