Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
THE FRESH-WATER BUDGET AND UNDER-ICE SPREADING OF MACKENZIE RIVER WATER IN THE CANADIAN BEAUFORT SEA BASED ON SALINITY AND O-18/O-16 MEASUREMENTS IN WATER AND ICE
SMHI, Research Department, Climate research - Rossby Centre.ORCID iD: 0000-0002-4971-9441
1995 (English)In: Journal of Geophysical Research, ISSN 0148-0227, E-ISSN 2156-2202, Vol. 100, no C1, 895-919 p.Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

Observations of salinity and oxygen isotope composition (delta(18)O) were made for the Beaufort shelf-Mackenzie estuary waters in September 1990, just prior to ice formation, and for both the water column and ice in April-May 1991, at the end of winter. These measurements are used to determine the apportioning of fresh water in the estuary between its two main sources, runoff and sea ice melt. Changes in disposition of water between seasons and amounts frozen into the growing ice sheet are also derived. Two domains are considered in order to construct a freshwater budget for the Mackenzie shelf, the nearshore within which landfast ice grows in winter and the outer shelf. Most of the winter inflow from the Mackenzie River appears to remain impounded as liquid under the ice within the landfast zone at the end of winter, and about 15% of it is incorporated into the landfast ice. Oxygen isotopes (delta(18)O) in ice cores collected from across the shelf record the progress beneath the ice of new Mackenzie inflow as it invades the nearshore throughout winter. Rates of spreading are about 0.2 cm s(-1) away from the coast and 1.3 cm s(-1) along the coast. As this inflow spreads across the shelf, it progressively shuts off convection driven by brine production at locations within the landfast ice. Salinity and delta(18)O in the offshore water column suggest that about 3 m of sea ice was for:med in the outer shelf domain. Since both brine and newly formed sea ice can be advected off the shelf, a complete budget for brine or sea ice production cannot be established without first measuring the advection of one of these two components.

Place, publisher, year, edition, pages
SWEDISH METEOROL & HYDROL INST,S-60176 NORRKOPING,SWEDEN., 1995. Vol. 100, no C1, 895-919 p.
National Category
Climate Research
Research subject
Climate
Identifiers
URN: urn:nbn:se:smhi:diva-1656DOI: 10.1029/94JC02700ISI: A1995QF30200011OAI: oai:DiVA.org:smhi-1656DiVA: diva2:897589
Available from: 2016-01-26 Created: 2015-12-22 Last updated: 2017-11-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Omstedt, Anders

Search in DiVA

By author/editor
Omstedt, Anders
By organisation
Climate research - Rossby Centre
In the same journal
Journal of Geophysical Research
Climate Research

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 142 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
v. 2.29.1
|