Time-series sampling of 223Ra and 224Ra at the inlet to Great South Bay (New York): a strategy for characterizing the dominant terms in the Ra budget of the bay.
Ra isotopes are a powerful tool for quantifying the flux of submarine groundwater discharge (SGD) into the sea. Previous studies of 223Ra and 224Ra mass balances in coastal embayments have shown that the Ra balance is dominated by supply via SGD, exchange with the open ocean and radioactive decay. The current study shows that a single time series over a tidal cycle at the principal inlet to Great South Bay (NY, US) is sufficient to determine the net flux of Ra across the inlet, and also can be used to estimate the decay of short-lived Ra in the bay. Estimates of the net Ra flux obtained from a single tidal time-series by using three different approaches agree with those determined from a more time-consuming survey of Ra within the bay, and may represent a first step of estimating SGD in bays and coastal lagoons.
Garcia-Orellana
J
J
School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY 11794-5000, USA. jordi.garcia@uab.cat
Cochran
J K
JK
Bokuniewicz
H
H
Yang
S
S
Beck
A J
AJ
D003625:Data Collection; D004784:Environmental Monitoring / Q000191:economics / Q000379:methods*; D005843:Geography; D006207:Half-Life; D009518:New York; D011886:Radon / Q000032:analysis*; D012623:Seawater / Q000032:analysis / Q000737:chemistry*; D012767:Ships; D013997:Time Factors; D014872:Water Movements; D014875:Water Pollutants, Radioactive / Q000032:analysis*
D014875:Water Pollutants, Radioactive; D011886:Radon