Smith and colleagues determined iodine-129, chlorofluorocarbons and sulfur hexafluoride during three GEOTRACES cruises in the Arctic Ocean.
Feb / 07 / 2023
Arctic Ocean
Greenland’s floating ice tongues, sources of dissolved lead to the Arctic
Using helium and neon as tracers for subglacial meltwater, Krisch and colleagues found that subglacial discharge is a source of dissolved lead.
Nov / 09 / 2022
Shedding light on Arctic Mercury
New research is now shining a light on mercury cycling on the Arctic shelf.
Sep / 15 / 2022
A vivid picture of particle distribution and sources in the Arctic Ocean
Extensive description of particle concentrations and chlorophyll-a fluorescence distribution along Arctic GEOTRACES sections.
Sep / 08 / 2022
The Arctic Ocean is a net source of micronutrients toward the North Atlantic through the gateway of Fram Strait
Krisch and colleagues present a flux budget for micronutrient exchange between the Arctic and the North Atlantic Ocean.
May / 18 / 2022
After the Mediterranean Sea one, don’t miss the Arctic present-day total mercury mass balance!
They provide an updated mass balance of the Arctic land and ocean mercury cycle.
Apr / 12 / 2022
What controls the barium distribution in the Arctic Ocean?
They synthesized what controls the barium distribution in the Arctic Ocean.
Apr / 05 / 2022
Central Arctic fertilization by the Transpolar Drift
Their findings highlight the importance of the Transpolar Drift in delivering dissolved silica and iron to feed low diatom primary production in the central Arctic Ocean.
Feb / 07 / 2022
New impetus to the debate on the sources of dissolved aluminium to the ocean
This study challenges the paradigm that dissolved aluminium in the bottom waters of the Arctic basins could result from a top-down process.
Nov / 10 / 2021
Icebergs as sources of trace metals to the ocean: which impact?
Earth’s Ice Sheets are known to release significant quantities of lithogenic particles into the ocean every year, but how does this material affect trace metal availability in the ocean?
Oct / 18 / 2021
Surprisingly heavy silicon isotopes in the surface and deep Arctic Ocean
Brzezinski and his colleagues report on a comprehensive study of the Arctic Ocean silicic acid concentrations and silicon isotopic composition…
Sep / 14 / 2021
Retreat of large marine-terminating glaciers may increase iron supply to surface waters
The findings demonstrate that glacial retreat and loss of ice-shelves may potentially result in increases in dissolved iron supply to surface waters downstream of large marine terminating glaciers in future.
May / 31 / 2021
Air-sea gas disequilibrium drove deoxygenation of the deep ice-age ocean
This study provides one of the first mechanistic explanations for Last Glacial Maximum deep ocean deoxygenation.
Mar / 18 / 2021
Time series thorium-230 data reveal scavenging intensification over the last 15 years in the Arctic Ocean
Authors demonstrate that the later hypothesis is likely explaining thorium-230-depletion in intermediate layers of the Amundsen basin.
Dec / 07 / 2020
Loss of old Arctic sea ice increases methylmercury concentrations
Researchers from the SCRIPPS, the Stockholm Natural Museum and the Mediterranean Institute of Oceanography show the importance of sea ice composition on methylmercury budgets
Sep / 02 / 2020
Dissolved gallium unravels Pacific and Atlantic waters in the Arctic Ocean
Whitmore and co-workers demonstrate that the dissolved gallium distribution provide a better water source deconvolution than the nutrient tracers
Jul / 22 / 2020
Precise estimate of the mercury export from the Arctic to the Atlantic Ocean
Using new observations acquired during GEOTRACES Arctic cruises, a refined arctic mercury budget has been established
Jul / 21 / 2020
The biogeochemical ventures of dissolved iron and manganese across the Arctic Ocean
The spatial distributions and biogeochemical cycling of dissolved Fe (dFe) and dissolved manganese (dMn) across the Arctic Ocean were established during summer and fall 2015. The Canadian GEOTRACES transect extended […]
May / 15 / 2020
Arctic mercury export flux with marine particles higher than anticipated
In the ocean, the residence time of mercury (Hg), is largely driven by two removal mechanisms: evasion to the atmosphere and downward export flux with settling particles. The later was […]
May / 06 / 2020
Land inputs in the Arctic transported up to the North Pole
A new study found that freshwater runoff from rivers and continental shelf sediments are bringing significant quantities of carbon and trace elements into parts of the Arctic Ocean
May / 05 / 2020
Silicon isotopes reveal the different Arctic endmembers contributing to the deep water formed in the North Atlantic Ocean
Combining a multiparametric analysis, biogenic and dissolved silicon (Si) isotope data (30Si-bSiO2 and δ30Si-DSi, respectively) in the Arctic Ocean, Liguori and co-workers (2020, see reference below) could unravel the influence […]
Apr / 20 / 2020
Particulate fluxes and circulation in a changing Arctic Ocean: tracer data and modeling
A complete review of published and new water column profiles of thorium-230 (230Th) and protactinium-231 (231Pa) concentrations and neodymium (Nd) isotopic compositions collected in the Amerasian Basin of the Arctic […]
Mar / 27 / 2020
The circulation loop in the North Atlantic and Arctic oceans depicted by the artificial radionuclides
Three articles from three cruises highlighted here! Atlantic waters have been recently recognized to play an increasing role in reducing sea-ice extent in the Arctic Ocean at a rate now […]
Jan / 30 / 2019
The residence times of trace elements determined in the surface Arctic Ocean during the 2015 US Arctic GEOTRACES expedition
Data collected during the US Arctic GEOTRACES expedition in 2015 (along GEOTRACES section GN01) were used to estimate the mean residence time of dissolved trace elements (iron-Fe, manganese-Mn, nickel-Ni, cadmium-Cd, […]
Nov / 15 / 2018
Methylmercury subsurface maxima explain mercury accumulation in Canadian Arctic marine mammals
Mercury (Hg) concentrations in Canadian Arctic marine mammals were monitored during the last four decades and found to be highly elevated, frequently exceeding toxicity thresholds. Mercury concentrations in marine biota […]
Nov / 05 / 2018
Environmental changes in the Arctic Ocean are occurring now!
Radium-228 increase in the central Arctic (2007 to 2015), is attributed to stronger wave action on shelves due to a longer ice-free season.
Sep / 22 / 2018
Climate change induced spectacular increase of the land-ocean inputs in the Arctic Ocean
Measurements of radium-228 (228Ra) in the framework of the 2015 U.S. GEOTRACES Arctic Transect (GN01), revealed that the surface water content of this tracer has almost doubled over the last […]
Jan / 09 / 2018
Dissolved neodymium isotopes and Rare Earth Elements combined with oxygen isotopes trace water masses in the Fram Strait
Georgi Laukert and co-workers (2017, see reference below) provide new insights into the sources, distribution and mixing of water masses passing the Fram Strait, the gateway between the Arctic Ocean […]
Feb / 02 / 2017
What do the first 236-Uranium data reveal in the Arctic Ocean?
Casacuberta and co-authors (2016, see reference below) propose the first set of data for the artificial radionuclide 236-Uranium (236U) in the Arctic Ocean. The novelty of this study compared to […]
Mar / 10 / 2016
Tracking the sea ice exported from the Siberian Shelf to the Arctic Ocean
An original method based on the use of the couple salinity – δ18O allows determining the fractions of water that had been removed as ice across the shelf and the […]
Nov / 26 / 2015