GEOTRACES-Arctic Section cruise HLY1502 event log, 10 August to 7 October 2015

Website: https://www.bco-dmo.org/dataset/646362
Data Type: Cruise Results
Version: 5
Version Date: 2018-06-27

Project
» U.S. Arctic GEOTRACES Study (GN01) (U.S. GEOTRACES Arctic)

Program
» U.S. GEOTRACES (U.S. GEOTRACES)
ContributorsAffiliationRole
Cutter, Gregory A.Old Dominion University (ODU)Principal Investigator
Kadko, David C.Florida International University (FIU)Principal Investigator
Landing, William M.Florida State University (FSU - EOAS)Principal Investigator, Contact
Copley, NancyWoods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Coverage

Spatial Extent: N:89.997 E:179.9942 S:54.5025 W:-179.9998
Temporal Extent: 2015-08-10 - 2015-10-09

Dataset Description

Event log for the GEOTRACES-Arctic cruise HLY1502, 10 August to 7 October 2015.

Versions:
2018-06-27: version 5. Corrected GEOTRACES_ID_Number_Range from 11260 to 12260 for GEOTRC_EVENTNO 6464. 2017-03-20: version 4. Corrected lon for GT_events 6247 and 6161; added 'Z' to ISO_DateTime_UTC_end; corrected year for 5 records.
2016-08-10: linked data to metadata page
2016-06-23: version 3
2016-05-19: version 2
2016-05-19: preliminary version

 


Data Processing Description

BCO-DMO Processing:

- added conventional header with dataset name; PI name; version date
- added cruise_id column
- reformatted date as yyyymmdd and time as HHMM
- added ISO_DateTime_UTC_START and ISO_DateTime_UTC_END
- removed extra blank spaces or replaced them with underscore
- removed trailing blank spaces


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Data Files

File
eventlog_HLY1502.csv
(Comma Separated Values (.csv), 97.82 KB)
MD5:873aee7299ae0a8bcceace23c673935c
Primary data file for dataset ID 646362

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Parameters

ParameterDescriptionUnits
cruise_idcruise identification unitless
GEOTRC_EVENTNOGeotraces event number unitless
LOCATIONlocation descriptor (typically station id) unitless
STNNBRGeotraces station number unitless
castcast number unitless
DATE_STARTStart date (GMT): yyyymmdd year month and day
TIME_STARTStart time (GMT): HHMM hours and minutes
ISO_DateTime_UTC_STARTStart date/time ISO formatted: YYYY-MM-DDTHH:MM:SS[.xx]Z year month day hours minutes
DATE_ENDEnd date (GMT) year month and day
TIME_ENDEnd time (GMT) hours and minutes
ISO_DateTime_UTC_ENDEnd date/time ISO formatted: YYYY-MM-DDTHH:MM:SS[.xx]Z year month day hours minutes
LAT_DEG_NLatitude degrees north degrees
LAT_MIN_NLatitude minutes north decimal minutes
LATITUDELatitude; north is positive decimal degrees
LON_DEG_WLongitude degrees west degrees
LON_MIN_WLongitude minutes west decimal minutes
LONGITUDELongitude; east is positive decimal degrees
DEPTH_MINMinimum depth meters
DEPTH_MAXMaximum depth meters
event_descriptionEvent Description Codes: nd :unknown ;not entered 30-ODF :30L Niskin Rosette Be-7 :Beryllium-7 sampling GT-C :GEOTRACES carousel Sboat :Small boat sampling I-edge :Ice edge water sampling I-hole :Ice hole water sampling I-pond :Ice pond sampling I-core :Ice core sampling I-dirt :Dirty ice sampling Snow :Snow Sampling MastUp :NASA solar reference mast UP MastDown :NASA solar reference mast DOWN McL-Prof :McLane pump profile Aeros :Aerosol sampler Argo :Argo Float deployment AOP :Apparent Optical Properties cast NASAsurf NASA surface pump water sample NEMO :NEMO Float Deployment Ra/Th/Pig :Radium/Thorium/Pigment Niskin Cast Surf Ra bag :Surface Radium bag Rain :Rain sample MTC :Multi-Corer Mono :Mono-Corer XBT :XBT XCTD :XCDT GS :36pl 10L Rosette Buoy :Buoy deployment UWay :Ship's Underway system sample unitless
samples_takenSamples Taken Codes: nd :unknown/ not recorded diss :dissolved samples diss+part :dissolved and particulate samples unfilt :unfiltered seawater filter :filter for particulates diss+ UF :Dissolved Trace Metals, Mn; Unfiltered Trace Metals Argo :Argo Float deployment dirt :Sediments part :Particle none :none unitless
GEOTRACES_ID_Number_RangeGEOTRACES ID Number and Range unitless
COMMENTcomments unitless

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Deployments

HLY1502

Website
Platform
USCGC Healy
Report
Start Date
2015-08-09
End Date
2015-10-12
Description
Arctic transect encompassing Bering and Chukchi Shelves and the Canadian, Makarov and Amundsen sub-basins of the Arctic Ocean. The transect started in the Bering Sea (60°N) and traveled northward across the Bering Shelf, through the Bering Strait and across the Chukchi shelf, then traversing along 170-180°W across the Alpha-Mendeleev and Lomonosov Ridges to the North Pole (Amundsen basin, 90°N), and then back southward along ~150°W to terminate on the Chukchi Shelf (72°N). Additional cruise information is available in the GO-SHIP Cruise Report (PDF) and from the Rolling Deck to Repository (R2R): https://www.rvdata.us/search/cruise/HLY1502


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Project Information

U.S. Arctic GEOTRACES Study (GN01) (U.S. GEOTRACES Arctic)


Coverage: Arctic Ocean; Sailing from Dutch Harbor to Dutch Harbor (GN01)


Description from NSF award abstract:
In pursuit of its goal "to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the ocean, and to establish the sensitivity of these distributions to changing environmental conditions", in 2015 the International GEOTRACES Program will embark on several years of research in the Arctic Ocean. In a region where climate warming and general environmental change are occurring at amazing speed, research such as this is important for understanding the current state of Arctic Ocean geochemistry and for developing predictive capability as the regional ecosystem continues to warm and influence global oceanic and climatic conditions. The three investigators funded on this award, will manage a large team of U.S.scientists who will compete through the regular NSF proposal process to contribute their own unique expertise in marine trace metal, isotopic, and carbon cycle geochemistry to the U.S. effort. The three managers will be responsible for arranging and overseeing at-sea technical services such as hydrographic measurements, nutrient analyses, and around-the-clock management of on-deck sampling activites upon which all participants depend, and for organizing all pre- and post-cruise technical support and scientific meetings. The management team will also lead educational outreach activities for the general public in Nome and Barrow, Alaska, to explain the significance of the study to these communities and to learn from residents' insights on observed changes in the marine system. The project itself will provide for the support and training of a number of pre-doctoral students and post-doctoral researchers. Inasmuch as the Arctic Ocean is an epicenter of global climate change, findings of this study are expected to advance present capability to forecast changes in regional and globlal ecosystem and climate system functioning.

As the United States' contribution to the International GEOTRACES Arctic Ocean initiative, this project will be part of an ongoing multi-national effort to further scientific knowledge about trace elements and isotopes in the world ocean. This U.S. expedition will focus on the western Arctic Ocean in the boreal summer of 2015. The scientific team will consist of the management team funded through this award plus a team of scientists from U.S. academic institutions who will have successfully competed for and received NSF funds for specific science projects in time to participate in the final stages of cruise planning. The cruise track segments will include the Bering Strait, Chukchi shelf, and the deep Canada Basin. Several stations will be designated as so-called super stations for intense study of atmospheric aerosols, sea ice, and sediment chemistry as well as water-column processes. In total, the set of coordinated international expeditions will involve the deployment of ice-capable research ships from 6 nations (US, Canada, Germany, Sweden, UK, and Russia) across different parts of the Arctic Ocean, and application of state-of-the-art methods to unravel the complex dynamics of trace metals and isotopes that are important as oceanographic and biogeochemical tracers in the sea.



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Program Information

U.S. GEOTRACES (U.S. GEOTRACES)


Coverage: Global


GEOTRACES is a SCOR sponsored program; and funding for program infrastructure development is provided by the U.S. National Science Foundation.

GEOTRACES gained momentum following a special symposium, S02: Biogeochemical cycling of trace elements and isotopes in the ocean and applications to constrain contemporary marine processes (GEOSECS II), at a 2003 Goldschmidt meeting convened in Japan. The GEOSECS II acronym referred to the Geochemical Ocean Section Studies To determine full water column distributions of selected trace elements and isotopes, including their concentration, chemical speciation, and physical form, along a sufficient number of sections in each ocean basin to establish the principal relationships between these distributions and with more traditional hydrographic parameters;

* To evaluate the sources, sinks, and internal cycling of these species and thereby characterize more completely the physical, chemical and biological processes regulating their distributions, and the sensitivity of these processes to global change; and

* To understand the processes that control the concentrations of geochemical species used for proxies of the past environment, both in the water column and in the substrates that reflect the water column.

GEOTRACES will be global in scope, consisting of ocean sections complemented by regional process studies. Sections and process studies will combine fieldwork, laboratory experiments and modelling. Beyond realizing the scientific objectives identified above, a natural outcome of this work will be to build a community of marine scientists who understand the processes regulating trace element cycles sufficiently well to exploit this knowledge reliably in future interdisciplinary studies.

Expand "Projects" below for information about and data resulting from individual US GEOTRACES research projects.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)
NSF Division of Ocean Sciences (NSF OCE)

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