[Directory] [Data...]

Data server object:  event_log




  
    Scientific sampling event log from R/V Knorr cruise KN210-04 in the Western Atlantic Ocean between Uruguay and Barbados in 2013 (Deep Atlantic DOM project)
    
  
  
    
    

Scientific sampling event log from R/V Knorr cruise KN210-04 in the Western Atlantic Ocean between Uruguay and Barbados in 2013 (Deep Atlantic DOM project)

Website: https://www.bco-dmo.org/dataset/4008
Version: 13 November 2013
Version Date: 2013-11-13

Project
» Dissolved Organic Matter Composition in the Deep Atlantic Ocean (Deep Atlantic DOM)

Program
» Ocean Carbon and Biogeochemistry (OCB)
ContributorsAffiliationRole
Kujawinski, ElizabethWoods Hole Oceanographic Institution (WHOI)Chief Scientist
Rauch, ShannonWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Dataset Description

The science party maintained a digital event log, recording all instrument deployments and significant events during the KN210-04 cruise.


Acquisition Description

The event log was created using the Rolling Deck to Repository (R2R) event log application (ELOG). The log includes a record of all scientific sampling events from the cruise. In addition to event identification numbers unique for the cruise, the scientific sampling event log includes date and time (GMT), position (latitude and longitude), station and cast identifier as appropriate to the sampling event, sampling instrument name (e.g. CTD911, planktonNetTow, McLanePump), name of person responsible for the sampling event, and a comment field to record additional information. See more information about the R2R event log.


Processing Description

Date/time and lat/lon corrections, including those indicated in the comment column, have been made:
- First pass at date/time & position corrections made using script by C. Sellers;
- Additional date/time corrections made by E. Kujawinski, K. Longnecker, & C. Breier;
- Additional position corrections made by S. Rauch.

BCO-DMO made the following modifications to the data display:
- parameter names were converted to lowercase and/or to standard BCO-DMO naming conventions;
- values of 'NaN', 'N/A', and blanks were replaced with 'nd' to indicate 'no data;
- commas in the comment field were replaced with semi-colons;
- the original dateTimeUTC field was separated into two columns: date_utc and time_utc.


[ table of contents | back to top ]

Parameters

ParameterDescriptionUnits
eventUnique ID number for the event; date-time string does NOT necessarily equal the date-time that the event actually occurred. Value serves a unique identifier only. dimensionless
date_utcDate (UTC) when the event occurred. Created from original dateTimeUTC field. YYYYmmdd
time_utcTime (UTC) when the event occurred; in hours and minutes (0000 to 2359). Created from original dateTimeUTC field. HHMM
instrumentName of instrument. dimensionless
actionActivity performed with the instrument. dimensionless
stationIdentification number of the sampling station. dimensionless
castConsecutive cast number for the instrument. dimensionless
latLatitude in decimal degrees at the time the event occurred. North = positive. decimal degrees
lonLongitude in decimal degrees at the time the event occurred. East = positive. decimal degrees
seafloorDepth of the water. meters
authorName of person that recorded the event. dimensionless
commentComment entered about the sampling event; free-text. dimensionless

[ table of contents | back to top ]

Deployments

KN210-04

Website
Platform
R/V Knorr
Start Date
2013-03-25
End Date
2013-05-09
Description
Western Atlantic cruise started at Montevideo, Uruguay and ended at Bridgetown, Barbados. Science Objectives: 1. Characterize deep ocean dissolved organic matter in water masses of western Atlantic Ocean. 2. Characterize microbial community at selected stations and at selected depths. 3. Characterize metabolic capabilities of surface, mesopelagic and bathypelagic microbial consortia vis-a-vis the degradation of organic matter from each zone. 4. Examine metabolic and phylogenetic links between microbes in different marine zones (surface, meso-pelagic and bathypelagic depths). Science Activities: 1. Collection of discrete water samples by Niskin-bottles. 2. Collection of microbial communities from these water samples, by in-situ pumping, or by net-traps and net-tows. 3. Incubation experiments in lab and on deck. 4. Underway mass spectrometry and flow cytometry, from seawater intake. More information is available from the WHOI Cruise Planning Synopsis. Additional cruise information and original data are available from the NSF R2R Data Catalog.


[ table of contents | back to top ]

Project Information

Dissolved Organic Matter Composition in the Deep Atlantic Ocean (Deep Atlantic DOM)

Coverage: Western Atlantic Ocean


Transformations of dissolved organic matter (DOM) in the deep ocean have profound impacts on the global carbon cycle due to the sequestration of carbon dioxide (CO2) away from the atmosphere. Although research has been conducted on the high molecular weight component of this material, the same cannot be said for low molecular weight DOM because the needed analytical techniques have not been available to determine its composition and reactivity. In recent years, a research team at Woods Hole Oceanographic Institution has acquired the necessary analytical capability. As such, in this project, they will carry out the first systematic survey of deep ocean DOM in the western Atlantic Ocean to characterize the low molecular weight fraction of DOM in southward flowing North Atlantic Deep Water (NADW), northward flowing Antarctic Bottom Water (AABW), and Antarctic Intermediate Water (AAIW). Using ultrahigh resolution mass spectrometry and multi-stage fragmentation coupled to liquid chromatography, the scientists will determine the spatial variability in the composition of DOM along the flow path of the water masses, as well as assess the source water, transport, and surface processes that contribute to temporal changes in DOM composition. These results will be augmented with structural elucidation and quantitative assays of unique marker compounds for each water mass. Results will provide important insights into the biogeochemical reactions that govern DOM dynamics in the deep ocean.


[ table of contents | back to top ]

Program Information

Ocean Carbon and Biogeochemistry (OCB)


Coverage: Global


The Ocean Carbon and Biogeochemistry (OCB) program focuses on the ocean's role as a component of the global Earth system, bringing together research in geochemistry, ocean physics, and ecology that inform on and advance our understanding of ocean biogeochemistry. The overall program goals are to promote, plan, and coordinate collaborative, multidisciplinary research opportunities within the U.S. research community and with international partners. Important OCB-related activities currently include: the Ocean Carbon and Climate Change (OCCC) and the North American Carbon Program (NACP); U.S. contributions to IMBER, SOLAS, CARBOOCEAN; and numerous U.S. single-investigator and medium-size research projects funded by U.S. federal agencies including NASA, NOAA, and NSF. The scientific mission of OCB is to study the evolving role of the ocean in the global carbon cycle, in the face of environmental variability and change through studies of marine biogeochemical cycles and associated ecosystems. The overarching OCB science themes include improved understanding and prediction of: 1) oceanic uptake and release of atmospheric CO2 and other greenhouse gases and 2) environmental sensitivities of biogeochemical cycles, marine ecosystems, and interactions between the two. The OCB Research Priorities (updated January 2012) include: ocean acidification; terrestrial/coastal carbon fluxes and exchanges; climate sensitivities of and change in ecosystem structure and associated impacts on biogeochemical cycles; mesopelagic ecological and biogeochemical interactions; benthic-pelagic feedbacks on biogeochemical cycles; ocean carbon uptake and storage; and expanding low-oxygen conditions in the coastal and open oceans.


[ table of contents | back to top ]

Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

[ table of contents | back to top ]

This document is created by info v 4.1f 5 Oct 2018 from the content of the BCO-DMO metadata database.    2019-09-22  00:55:36