Data Compilation

New BioGEOTRACES data sets: Connecting pieces of the microbial biogeochemical puzzle

Microorganisms play a central role in the transfer of matter and energy in the marine food web. Microbes depend on micronutrients (e.g. iron, cobalt, zinc, and a host of other trace metals) to catalyze key biogeochemical reactions, and their metabolisms, in turn, directly affect the cycling, speciation, and bioavailability of these compounds. One might therefore […]

Dec / 20 / 2018

52 years of Benthic Nepheloid Layer data!

A data base of 2412 profiles collected using the Lamont Thorndike nephelometer from 1964 to 1984 is used to globally map turbid nepheloid layers by Gardner and co-workers (2018, see reference below). The authors compare maps from that period with maps based on data from 6392 profiles measured using transmissometers from 1979 to 2016 (see […]

Oct / 04 / 2018

Particle distribution in repeated ocean sections and sediment resuspension

This is the first compilation of an expansive data base of transmissometer data on a decadal period of time. More than 7376 stations have been analyzed for “cp” value, a proxy for particle concentrations, by Gardner and co-workers (2018, see reference below). Full water-column sections confirm that particle concentrations are higher in surface waters, decrease […]

Jan / 25 / 2018

Benthic nepheloid layer global compilation: an invaluable resource for GEOTRACES researchers

Models simulating any oceanic tracer biogeochemistry require a good depiction of the particle distribution, key to incorporating properly scavenging-remineralization processes. However, this kind of description is still rare. Gardner and co-workers (2018, see reference below) are providing an exceptional compilation of the Benthic Nepheloid Layers (BNL) around the world. BNLs have been mapped using 6,392 full-depth […]

Nov / 27 / 2017

What is generating the benthic nepheloid layers?

How ubiquitous, variable or persistent are nepheloid layers? What is the main process generating these “clouds at the bottom of the sea”? Gardner and co-workers (2017, see reference below) explore these two critical questions, with a focus on the western North Atlantic for which numerous time series and survey data exist. They piece together a […]

Feb / 20 / 2017

GEOTRACES publishes the motivations and description of its first Intermediate Data Product

GEOTRACES proposes an article that describes its first integrated and quality controlled Intermediate Data Product 2014 (IDP2014): the digital data package and the eGEOTRACES electronic Atlas that provides section plots and animated 3D scenes of the data. The 3D scenes provide geographical and bathymetric context crucial for tracer assessment and interpretation. With this release, GEOTRACES seeks to […]

Nov / 25 / 2015

GEOTRACES: Changing the way we explore ocean chemistry

Read about the experiences and lessons learned in the planning and implementation of GEOTRACES international programme in a recent paper published in Oceanography. Anderson and co-authors present an extraordinary synthesis of the GEOTRACES programme showing the benefits of an international collaborative research effort such as GEOTRACES. It is hoped that this paper provides useful guidance to scientists […]

Apr / 01 / 2014

Trace metals in deep ocean waters: A review

A synthesis on the data available on the distribution of selected trace metals (i.e. Cadmium, Cobalt, Copper, Molybdenum, Nickel, Lead and Zinc) in the deep ocean from 1979 to 2009 is provided by Aparicio-González and colleagues (Aparicio-González et al., 2012). This article also identifies patterns as well as gaps in currently available data in terms […]

Jul / 04 / 2012

A global compilation of the neodymium isotopic composition of seawater for GEOTRACES

GEOTRACES will allow the collection of numerous data that will be archived in the GEOTRACES Data Assembly Centre (GDAC), and will eventually contribute to create a world atlas of tracers in the ocean. However, data acquired on GEOTRACES core parameters in the framework of past cruises could also be considered in this gathering. With this […]

May / 16 / 2012