|
BORA >
University of Bergen >
Research centres and projects >
BCCR - Bjerknes Centre for Climate Research >
Eprints by the Bjerknes Centre for Climate Research (BCCR) >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1956/390
|
Full metadata record
| DC Field | Value | Language |
|---|
| contributor.author | Fer, I. | en_US |
| contributor.author | Haugan, P. M. | en_US |
| date.accessioned | 2004-07-12T10:16:18Z | en_US |
| date.accessioned | 2004-08-03T12:58:15Z | en_US |
| date.accessioned | 2004-08-26T11:58:03Z | - |
| date.available | 2004-07-12T10:16:18Z | en_US |
| date.available | 2004-08-03T12:58:15Z | en_US |
| date.available | 2004-08-26T11:58:03Z | - |
| date.issued | 2003 | en_US |
| identifier.issn | 0024-3590 | en_US |
| identifier.uri | http://hdl.handle.net/1956/390 | - |
| description.abstract | The dissolution from a liquid CO2 lake source located at a flat ocean bottom at 3,000 m depth is investigated.
Using the unsteady, two-dimensional advection–diffusion equation, temporal and spatial distribution of CO2 dissolved
from the source of 500 m length and of unit span is sought in a domain of 20 km horizontal and 200 m
vertical extent. Different cases were run with uniform longitudinal speed and constant horizontal and vertical
diffusion coefficients and with vertical profiles of velocity and diffusivity derived from turbulent boundary layer
theory. Each case was run with and without a hydrate film at the interface between the seawater and the liquid
CO2. The properties of the hydrate film are modeled using a capillary permeation model. The computations show
that the presence of a hydrate layer retards the dissolution rate by a factor of 2.7 when the density effects due to
the increase of CO2 concentration as a result of the dissolution are neglected. However, the strong, stable stratification
above the hydrate layer, as a consequence of the increase in density of seawater enriched by CO2, suppresses the
vertical mixing considerably and reduces the sensitivity to hydrate. The dissolution rate is found to be 0.1 m yr21
for realistic vertical profiles of longitudinal velocity (order of 5 cm s21) and diffusivity. However, during conditions
of a benthic storm (20 cm s21), the dissolution rate reaches 1.6 m yr21. | en_US |
| format.extent | 290221 bytes | en_US |
| format.extent | 166 bytes | en_US |
| format.extent | 290221 bytes | en_US |
| format.extent | 61133 bytes | - |
| format.extent | 290221 bytes | - |
| format.extent | 166 bytes | - |
| format.mimetype | application/pdf | en_US |
| format.mimetype | text/plain | en_US |
| format.mimetype | application/pdf | en_US |
| format.mimetype | text/plain | - |
| format.mimetype | application/pdf | - |
| format.mimetype | text/plain | - |
| language.iso | en | en_US |
| publisher | American Society of Limnology and Oceanography | - |
| relation.ispartofseries | Limnology and Oceanography; 48(2) | en_US |
| title | Dissolution from a liquid CO2 lake disposed in the deep ocean | en_US |
| type | Article | en_US |
| Appears in Collections: | Eprints by the Bjerknes Centre for Climate Research (BCCR)
|
Files in This Item:
| File |
Size | Format |
|---|
| 0872.pdf | 283Kb | Adobe PDF | View/Open |
|
Show simple item record
All items in BORA are protected by copyright, with all rights reserved.
|
