Drought
; Nickel
; Rivers
; Coastal waters
; Coral
; Coral colonies
; Intertropical convergence zone
; ITCZ
; Porites
; River discharge
; Seasonality
; Discharge (fluid mechanics)
; barium
; calcium
; sea water
; barium
; calcium
; barium
; biomarker
; calcium
; climate change
; coral
; drought
; El Nino
; hydrological response
; intertropical convergence zone
; river discharge
; Article
; climate
; coral
; correlational study
; El Nino
; hydroclimate
; nonhuman
; Panama
; Porites lobata
; river
; river discharge
; seasonal variation
; animal
; Anthozoa
; drought
; environmental monitoring
; island (geological)
; procedures
; river
; season
; Coiba Island
; Gulf of Chiriqui
; Pacific Ocean
; Panama [Central America]
; Veraguas
; Anthozoa
; Porites
; Animals
; Anthozoa
; Barium
; Calcium
; Droughts
; El Nino-Southern Oscillation
; Environmental Monitoring
; Islands
; Panama
; Rivers
; Seasons
; Seawater
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
Panam�'s extreme hydroclimate seasonality is driven by Intertropical Convergence Zone rainfall and resulting runoff. River discharge (Q) carries terrestrially-derived barium to coastal waters that can be recorded in coral. We present a Ba/Ca record (1996–1917) generated from a Porites coral colony in the Gulf of Chiriqu� near Coiba Island (Panam�) to understand regional hydroclimate. Here coral Ba/Ca is correlated to instrumental Q (R�=�0.67, p�<�0.001), producing a seasonally-resolved Reduced Major Axis regression of Ba/Ca (μmol/mol)�=�Q (m3/s)ï¿½× 0.006���0.001 (μmol/mol)(m3/s)−�1�+�4.579���0.151. Our results support work in the neighboring Gulf of Panam� that determined seawater Ba/Ca, controlled by Q, is correlated to coral Ba/Ca (LaVigne et al., 2016). Additionally, the Coiba coral Ba/Ca records at least 5 El Ni�o events and identified 22 of the 37 wet seasons with below average precipitation. These data corroborate the Q proxy and provide insight into the use of coral Ba/Ca as an El Ni�o and drought indicator. � 2017 Elsevier Ltd
Lamont-Doherty Earth Observatory, 61 Route 9W, Palisades, NY, United States; Department of Earth and Environmental Science, Columbia University, New York, NY, United States; Department of Environmental Earth Systems Science, Stanford University, Stanford, CA, United States
Recommended Citation:
Brenner L.D.,Linsley B.K.,Dunbar R.B.. Examining the utility of coral Ba/Ca as a proxy for river discharge and hydroclimate variability at Coiba Island, Gulf of Chirqu�, Panam�[J]. Marine Pollution Bulletin,2017-01-01,118(2018-01-02)