Marret, F., Scourse, J. D. and Austin, W. E N. (2004). Holocene shelf--sea seasonal stratification dynamics. Holocene 14 (5). Vol 14(5), pp. 689-696.
 Title The title of the publication or report |
Holocene shelf--sea seasonal stratification dynamics | ||
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Subtitle The sub title of the publication or report |
a dinoflagellate cyst record from the Celtic Sea, NW European shelf | ||
Issue The name of the volume or issue |
Holocene 14 (5) | ||
Series The series the publication or report is included in |
The Holocene | ||
Volume Volume number and part |
14 (5) | ||
Page Start/End The start and end page numbers. |
689 - 696 | ||
Biblio Note This is a Bibliographic record only. |
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Publication Type The type of publication - report, monograph, journal article or chapter from a book |
Journal | ||
Abstract The abstract describing the content of the publication or report |
Published records of the Holocene evolution of seasonal stratification in the Celtic Sea (northwest European shelf) have been based on benthic proxies, notably benthic foraminifera and associated stable isotopic data. The authors have investigated organic-walled dinoflagellate cyst assemblages from a well-dated Holocene sequence from the central Celtic Sea in order to assess the signal from this planktonic proxy and to reconstruct paired bottom-and surface-water conditions through time. This sequence has, on the basis of the benthic proxies, been interpreted previously as a record of the replacement of tidally mixed water by stratified water associated with tidal-front migration during the early Holocene. Interpretation of the dinocyst record has been facilitated by a parallel study of the distribution of cysts from Celtic Sea surface sediments and their relationship with seasonal water masses. The dinocyst stratigraphy indicates mixed-water conditions during the early Holocene consistent with reduced water depths (hence lowered sea level) over the core site. The first significant change in the dinocyst assemblages is recorded at around 6650 cal years BP and indicates a transition from mixed-frontal conditions to seasonal stratification. This interpretation of frontal migration is consistent with changes in the benthic foraminiferal assemblages and associated stable isotopes at the same core depth. From 6650 to 3600 cal years BP, the significant occurrence of Bitectatodinium tepikiense accompanied by Spiniferites elongatus is attributed to strong seasonality, with winter sea-surface temperatures possibly below 5C. Another transition at 3600 cal years BP is attributed to a reduction in seasonality generated by milder winter conditions linked to a stronger influence of the thermohaline circulation over the studied area. This transition is not recorded by the benthic proxies and is attributed to climate forcing rather than to any change in tidal dynamics. It is notable that many mires in western Britain record distinct wet shifts contemporary with this change. | ||
Year of Publication The year the book, article or report was published |
2004 | ||
Locations Any locations covered by the publication or report. This is not the place the book or report was published. |
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Source Where the record has come from or which dataset it was orginally included in. |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
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Relations Other resources which are relevant to this publication or report |
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Created Date The date the record of the pubication was first entered |
01 May 2007 |
