| Contributors | Affiliation | Role |
|---|---|---|
| Burnett, William C. | Florida State University (FSU - EOAS) | Principal Investigator |
| Mortazavi, Behzad | University of Alabama-Tuscaloosa (UA/Tuscaloosa) | Co-Principal Investigator |
| Allison, Dicky | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Radium isotope results from groundwater wells around Lake Shelby, Alabama. These data are part of a study to assess submarine groundwater discharge.
Results, methodology, summary tables and instrumentation are included in:
Su, Ni, W.C. Burnett, H.L. MacIntyre, J.D. Liefer, R.N. Peterson and R. Viso, 2014. Natural Radon and Radium Isotopes for Assessing Groundwater Discharge into Little Lagoon, AL: Implications for Harmful Algal Blooms. Estuaries and Coasts, 37: 893-910. (pdf)
Keywords: Radium isotopes; Submarine groundwater discharge; algal blooms;
| File |
|---|
radium_isotopes_gw_rs.csv (Comma Separated Values (.csv), 6.11 KB) MD5:e02dc0a5d3138bf584df691359960d75 Primary data file for dataset ID 537393 |
| Parameter | Description | Units |
| date_local | date at time of collection | dd-mon-yy |
| year | year of collection | yyyy |
| yrday_local | day of year - mostly for plotting | julian day |
| site | descriptive text for station | text |
| lat | latitude | decimal degrees; North is positive |
| lon | longitude | decimal degrees; West is negative |
| sal | salinity | practical salinity units |
| Ra223 | radium isotope 223 | disintegrations per minute per Liter |
| err_Ra223 | uncertainty of measurements - plus or minus one delta | disintegrations per minute per Liter |
| temp | temperature of water | degrees centigrade |
| Ra224 | radium isotope 224 | disintegrations per minute per 100 Liters |
| err_Ra224 | uncertainty of measurements - plus or minus one delta | disintegrations per minute per 100 Liters |
| Ra226 | radium isotope 224 | disintegrations per minute per 100 Liters |
| err_Ra226 | uncertainty of measurements - plus or minus one delta | disintegrations per minute per 100 Liters |
| Ra228 | radium isotope 224 | disintegrations per minute per 100 Liters |
| Ra228_err | uncertainty of measurements - plus or minus one delta | disintegrations per minute per 100 Liters |
| Dataset-specific Instrument Name | Ortec IG detector |
| Generic Instrument Name | Gamma Ray Spectrometer |
| Dataset-specific Description | with relative efficiency of 20% (Dulaiova and Burnet, 2004) - see methodology paper by Su et al.
Ra determined via Lucas cell counting and assessed by gamma spectrometry (R=0.97, n=112). |
| Generic Instrument Description | Instruments measuring the relative levels of electromagnetic radiation of different wavelengths in the gamma-ray waveband. |
| Website | |
| Platform | SmallBoat_FSU |
| Start Date | 2010-04-05 |
| End Date | 2013-08-17 |
| Description | The sampling sites were all accessed from small boats, here amalgamated to one deployment called LittleLagoon. |
This project investigated the link between submarine groundwater discharge (SGD) and microalgal dynamics in Little Lagoon, Alabama. In contrast to most near-shore environments, it is fully accessible; has no riverine inputs; and is large enough to display ecological diversity (c. 14x 0.75 km) yet small enough to be comprehensively sampled on appropriate temporal and spatial scales. The PIs have previously demonstrated that the lagoon is a hot-spot for toxic blooms of the diatom Pseudo-nitzchia spp. that are correlated with discharge from the surficial aquifer. This project assessed variability in SGD, the dependence of benthic nutrient fluxes on microphytobenthos (MPB) abundance and productivity, and the response of the phytoplankton to nutrient enrichment and dilution. The work integrated multiple temporal and spatial scales and demonstrated both the relative importance of SGD vs. benthic recycling as a source of nutrients, and the role of SGD in structuring the microalgal community. (paraphrased from Award abstract)
| Funding Source | Award |
|---|---|
| NSF Division of Ocean Sciences (NSF OCE) |