Decade-scale trend in sea water salinity revealed through δ 18O analysis of Montastraea annularis annual growth bands

R. B. Halley, P. K. Swart, R. E. Dodge, J. H. Hudson

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Hourly temperature data was collected from the Hen and Chickens Reef in the Florida Keys between 1975 and 1988 and compared to the δ18O of Montastraea annularis skeleton that grew during the same interval. Despite high-resolution sampling the authors were unable to obtain the full temperature-induced δ18O range in the skeleton. The data suggest that, during the summer, evaporation causes isotopic enrichment in the water, partially masking the temperature-induced signal. The data also show that oxygen isotopic composition of seawater at the reef has increased since 1981. This increase indicates that salinity has increased slightly during the past decade, perhaps as a result of increased evaporation in waters of Florida Bay and the Keys. -from Authors

Original languageEnglish (US)
Pages (from-to)670-678
Number of pages9
JournalBulletin of Marine Science
Issue number3
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science


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