Long-term variability of temperature and (super 14) C in the Gulf Stream; oceanographic implications.

Variability in temperature and 14C levels are recorded in coralline aragonite that grew in the Gulf Stream during the past four centuries. In particular, 180/160 ratios reflect a decrease of ca 1°C in surface water temperature during the latter part of the Little Ice age. 14C levels also rose in the...

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Bibliographic Details
Main Author: Druffel, Ellen R M
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 1983
Subjects:
Physical Sciences and Mathematics
currents
Gulf Stream
Montastrea
Montastrea annularis
Straits of Florida
paleo oceanography
Scleractinia
Zoantharia
X ray data
O 18 O 16
temperature
ocean circulation
solar activity
Anthozoa
Coelenterata
Atlantic Ocean
North Atlantic
sea water
oxygen
atmosphere
C 14
carbon
isotopes
radioactive isotopes
Invertebrata
carbon dioxide
stable isotopes
geochemistry
carbonates
aragonite
Online Access:http://www.escholarship.org/uc/item/7366q8s4
Description
Summary:Variability in temperature and 14C levels are recorded in coralline aragonite that grew in the Gulf Stream during the past four centuries. In particular, 180/160 ratios reflect a decrease of ca 1°C in surface water temperature during the latter part of the Little Ice age. 14C levels also rose in the surface waters of the Gulf Stream and in atmospheric CO2 during the Maunder minimum. These observations indicate that ocean circulation may have been significantly different in the North Atlantic around the beginning of the 18th century.

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