| Contributors | Affiliation | Role |
|---|---|---|
| Letelier, Ricardo | Oregon State University (OSU-CEOAS) | Principal Investigator, Contact |
| Nahorniak, Jasmine | Oregon State University (OSU-CEOAS) | Data Manager |
| Gegg, Stephen R. | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
Nutrients for CMORE BiG RAPA; ingested into BCO-DMO: May 04, 2011
Corrected for index of refraction.
| File |
|---|
nutrients.csv (Comma Separated Values (.csv), 21.00 KB) MD5:f6d6fdc9e4c78e7633118b38c19261fc Primary data file for dataset ID 3472 |
| Parameter | Description | Units |
| sta | station number | dimensionless |
| cast | cast number | dimensionless |
| date | date | YYYYMMDD GMT |
| time | time | HHMM GMT |
| lat | latitude | decimal degrees (South is negative) |
| lon | longitude | decimal degrees (West is negative) |
| depth | depth | meters |
| bot | rosette bottle number | dimensionless |
| PO4 | phosphate (Note: BDL in the dataset means "Below Detection Limit") | micromoles per liter |
| NO3_NO2 | nitrate plus nitrite (Note: BDL in the dataset means "Below Detection Limit") | micromoles per liter |
| SiO4 | silicate (Note: BDL in the dataset means "Below Detection Limit") | micromoles per liter |
| NO2 | nitrite (Note: BDL in the dataset means "Below Detection Limit") | micromoles per liter |
| NH4 | ammonium (Note: BDL in the dataset means "Below Detection Limit") | micromoles per liter |
| Dataset-specific Instrument Name | Nutrient Autoanalyzer |
| Generic Instrument Name | Nutrient Autoanalyzer |
| Dataset-specific Description | */
A 5-channel, continuous flow analyzer was used for dissolved nutrient determinations on the BIG RAPA cruise. Alpkem and Technicon AutoAnalyzer II™ components were used to measure phosphate, ammonium, nitrite, silicic acid and nitrate plus nitrite (N+N). A Keithley model 575 data acquisition system backed by analog strip chart recorders was used to acquire the data. Absorbance data was converted to concentrations using the OSU program NUTCALC. |
| Generic Instrument Description | Nutrient Autoanalyzer is a generic term used when specific type, make and model were not specified. In general, a Nutrient Autoanalyzer is an automated flow-thru system for doing nutrient analysis (nitrate, ammonium, orthophosphate, and silicate) on seawater samples. |
| Website | |
| Platform | R/V Melville |
| Report | |
| Start Date | 2010-11-18 |
| End Date | 2010-12-14 |
| Description | The South East Pacific (SEP) is characterized by very high nutrient concentrations in the waters adjacent to the Chilean coast, but very low nutrient concentrations (oligotrophic) in the mid- South Pacific Subtropical Gyre (SPSG), near Easter Island. The steep gradient in nutrient concentrations across the region affects the level of marine production, the composition of the microbial community, and the operation of major biogeochemical cycles in ways that are not fully understood. Despite the remarkable diversity of trophic conditions, strong gradients and even some unique singularities, the SEP is still the most sparsely sampled oceanic region of the global ocean from hydrodynamic, biological and biogeochemical points of view. The SPSG is also the most oligotrophic of all sub-tropical gyres.
Previous expeditions and remote sensing studies have describes the nutrient and chlorophyll field, but there have been few simultaneous measurements of chemical properties with microbial community structure and function.
This expedition is designed to investigate the impact of elemental nutrient (nitrogen, phosphorus, iron, silicon, carbon) ratios on marine productivity and microbial community composition. We propose to sample along a line extending from the Chilean coast near Arica to Easter Island. We will occupy three major "process" stations for up to five days each; a high productivity, near shore station, a mid-cruise station in the nutrient transition zone, and a low productivity, mid-gyre station near Easter Island. In between these stations, we will briefly sample at additional "survey" stations at lower intensity along the cruise track.
Cruise information and original data are available from the NSF R2R data catalog.
BiG RAPA Home project Web site with additional information |
The Center for Microbial Oceanography: Research and Education (C-MORE) is a recently established (August 2006; NSF award: EF-0424599) NSF-sponsored Science and Technology Center designed to facilitate a more comprehensive understanding of the diverse assemblages of microorganisms in the sea, ranging from the genetic basis of marine microbial biogeochemistry including the metabolic regulation and environmental controls of gene expression, to the processes that underpin the fluxes of carbon, related bioelements and energy in the marine environment. Stated holistically, C-MORE's primary mission is: Linking Genomes to Biomes.
We believe that the time is right to address several major, long-standing questions in microbial oceanography. Recent advances in the application of molecular techniques have provided an unprecedented view of the structure, diversity and possible function of sea microbes. By combining these and other novel approaches with more well-established techniques in microbiology, oceanography and ecology, it may be possible to develop a meaningful predictive understanding of the ocean with respect to energy transduction, carbon sequestration, bioelement cycling and the probable response of marine ecosystems to global environmental variability and climate change. The strength of C-MORE resides in the synergy created by bringing together experts who traditionally have not worked together and this, in turn, will facilitate the creation and dissemination of new knowledge on the role of marine microbes in global habitability.
The new Center will design and conduct novel research, broker partnerships, increase diversity of human resources, implement education and outreach programs, and utilize comprehensive information about microbial life in the sea. The Center will bring together teams of scientists, educators and community members who otherwise do not have an opportunity to communicate, collaborate or design creative solutions to long-term ecosystem scale problems. The Center's research will be organized around four interconnected themes:
Each theme will have a leader to help coordinate the research programs and to facilitate interactions among the other related themes. The education programs will focus on pre-college curriculum enhancements, in service teacher training and formal undergraduate/graduate and post-doctoral programs to prepare the next generation of microbial oceanographers. The Center will establish and maintain creative outreach programs to help diffuse the new knowledge gained into society at large including policymakers. The Center's activities will be dispersed among five partner institutions:
and will be coordinated at the University of Hawaii at Manoa.
| Funding Source | Award |
|---|---|
| NSF Division of Biological Infrastructure (NSF DBI) |