| Identifier |
2021-334-FA |
| Alternate names |
Sed Trap Cruise |
| Purpose |
The purpose of this trip is to transport the USGS sediment trap mooring to Miami to load it on the RV Ron Brown. The sediment trap will be deployed from the RV Ron Brown during the upcoming GOMECC cruise in the Northern Gulf of America (Gulf of Mexico). This fieldwork supports USGS Climate R&D Project entitled “Reconstructing Ocean Circulation & Hydroclimate in the Subtropical Atlantic” (GX21MN00U4U1500). It is required for the newly funded 5-year NOAA NGI Project entitled “Characterizing the biodiversity and variability of the biological carbon pump in the Northern Gulf of America (Gulf of Mexico)”, on which Julie Richey is a co-PI. |
| Location |
Northern Gulf of America (Gulf of Mexico) |
| Summary |
Sediment trap was successfully deployed at 28.240117N 89.127993 W in 1122m meters of water. CTD cast water collected at 12 depths for DIC/d13C, trace metals, water isotopes, and TA/TCO2 analysis. A plankton tow was also cast and 20 individual foraminifera were collected live for culture studies. |
| Info derived |
We propose to deploy a moored dual-sediment trap within the northern Gulf of America (Gulf of Mexico) (nGOM; 27.5°N, 90.3°W, ~1,200‐m water depth) to collect and quantify particulate fluxes at the base of the euphotic zone and collect and examine eDNA associated with sinking particulates. The proposed deployment site is ideal to study variability in the BCP, as it experiences dynamic biogeochemical conditions driven by Loop Current eddies, transient tropical cyclone events, and pulsed input of nutrients and organic matter via Mississippi River discharge. The deployment of two sediment traps on a single mooring will allow for sample collections to be treated distinctly to best preserve eDNA in Trap 1 (e.g., using a DNA preservative) and particulate materials in Trap 2 (buffered formalin). Trap 1 will be stationed at 120 m (near the bottom of the nGoM euphotic zone) and Trap 2 will be stationed at 700 m water depth to maximize microfossil collection (also for historical time-series consistency). The traps will be programmed to collect samples on a biweekly to monthly basis and will be recovered and redeployed on an approximately annual basis. |
| Comments |
We are not going on the cruise, Just mobilizing, transferring supplies, and helping to set up the sediment trap. |
| Projects |
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| Platform |
| Pelican 116'
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| Vehicles |
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| Itinerary |
| Start |
Saint Petersburg, FL |
2021-12-04 |
| End |
Cocodrie, LA |
2021-12-07 |
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