High Resolution Time Series Measurements of Bio-optical and Physical Variability in the

Coastal Ocean as Part of HyCODE

Dickey Mooring

The long-term goal of our project is to increase understanding of the variability of inherent and apparent optical properties (IOPs and AOPs) of ocean waters and their relationships to each other as well as to physical processes on continental shelves.

Specifically:

• To provide the maximum number of in situ observations of IOPs and AOPs possible for calibrating, groundtruthing, and relating subsurface optical properties to aircraft and spacecraft ocean color data

• To develop, test, and validate optical models and high resolution interdisciplinary models of the coastal ocean.

• To study processes that contribute to temporal and spatial variability of spectral IOPs and AOPs. In particular, we are determining how temporal and spatial variability in IOPs and AOPs are affected by:- Coastal physical and biological dynamics and larger scale circulation patterns,- Wave fields,- Water column stratification and current shears,- Near surface and near bottom mixing, - Diurnal and seasonal biological and physical cycles, and - Riverine and runoff inflows.

Objectives

Approach, 2001

What’s New?- Hyperspectral Ed/Lu sensors- Temperature every ~1m- Salinity every 3-5m- Shorter deployment

Sampling Ratesac-9: once per hourADCP: once per minuteBeam c: once per minuteFluorometer: once per minuteHydroScat-6: once per hourHyperspectral: once per hourMicrocat: once per minutePAR: 8 times per hourPressure: once per secondSBE-39: once per minuteSeacat: once per minuteTidbit: once every 5 minutesTSKA: once every 2 minutes

Data collected?Everything except:- ADCP quit JD 184 - HiStar dropped data packets- HydroScat-6 quit JD 179- 5m Lu didn’t work- SAFire (several ’s)

Resultsac-9

ADCP

Transmissometer and Fluorometer

HydroScat-6

Hyperspectral Ed/Lu

HyperspectralEd/Lu

PAR

Bottom Pressure

1-min avg12-hr avg24-hr avg

Hydrography

Temperature