Salinity records for the 1997-98 El Niño from Western Pacific corals

Details Salinity records for the 1997-98 El Niño from Western Pacific corals Salinity records for the 1997-98 El Niño from Western Pacific corals

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29k..35m&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 11, pp. 35-1, CiteID 1540, DOI 10.1029/2001GL013521

Mathematics

Logic

12

Oceanography: General: Equatorial Oceanography, Oceanography: Physical: El Nino, Oceanography: Biological And Chemical: Stable Isotopes

Scientific paper

Seasonal sea surface salinity (SSS) records can be of great value in reconstructing El Niño/Southern Oscillation (ENSO) variability in the equatorial Western and Central Pacific, a region where ENSO-related evaporation and precipitation (E-P) changes are dramatic. The δ18O values of coral skeleton (δ18Ocoral) reflect seawater δ18O (δ18Oseawater) changes, which in tropical oceans are also generally influenced by E-P changes. Therefore, δ18Ocoral is a good indicator of rainfall and ENSO variability. We present biweekly data from Palau, in the northern part of the Western Pacific Warm Pool, for the period 1998-2000, which indicate a strong quantitative relationship between δ18Ocoral, sea surface temperature, δ18Oseawater and SSS. The coral skeletal δ18O values documented the SSS changes after the 1997-98 El Niño therefore, δ18Ocoral can be used to estimate paleosalinity changes. However, the slope of the δ18Oseawater - SSS relationship cannot be assumed to be constant throughout the tropics, making site-specific calibrations is essential.

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