Note
Water and sediment temperatures from Florida's Indian River Lagoon are used to investigate water-sedi- ment heat energy exchanges and the resulting sub-bottom temperature fluctuations in a shallow-water estuarine environ- ment. A 132-day study documents the response to cold-air outbreaks and spring warming. A one-dimensional, 120-layer numerical model simulates temperatures in the top 24 m of the sediment in response to observed water temperatures. Model simulations supplement sediment temperatures measured 50 and 95 cm below the water-sediment interface approximately weekly.