Deep water in the late Maastrichtian ocean

Steven D'Hondt, Michael Allan Arthur

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Stable isotopic data from benthic foraminifera indicate the occurence of at least three deepwater masses in the late Maastrichtian ocean. Given mean oceanic δ18Ow of -1.0‰, the temperature of the coolest intermediate-depth waters was 5°-7°C, that of the deepest waters was 10°C, and that of the warmest intermediate waters was 13°-15°C. The cool intermediate-depth water mass probably originated in the high-latitude Southern Ocean. The deepest waters originated at least partly in the northern Atlantic. The source region for the warmest intermediate-depth water mass is unknown. Although much of the late Maastrichtian deep water was probably preconditioned for winter sinking by low- or middle-latitude evaporation, no more than ∼11% of late Maastrichtian deep water could have been directly actuated by low-latitude sea surface evaporation. At least in the southern Atlantic and Indian Oceans, heat transport by upwelling of deep water was not the primary cause of mild sea surface and coastal temperatures.

Original languageEnglish (US)
JournalPaleoceanography
Volume17
Issue number1
DOIs
StatePublished - Jan 1 2002

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Maastrichtian
deep water
ocean
water mass
sea surface
evaporation
intermediate water
benthic foraminifera
warm water
upwelling
water depth
temperature
winter

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Palaeontology

Cite this

D'Hondt, Steven ; Arthur, Michael Allan. / Deep water in the late Maastrichtian ocean. In: Paleoceanography. 2002 ; Vol. 17, No. 1.
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Deep water in the late Maastrichtian ocean. / D'Hondt, Steven; Arthur, Michael Allan.

In: Paleoceanography, Vol. 17, No. 1, 01.01.2002.

Research output: Contribution to journalArticle

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