Trans Polar Drift transport controls the dissolved copper-organic binding ligand distribution
Arnone and her colleagues report the concentrations and conditional stability constants of dissolved copper-binding ligands in the Arctic Ocean…
Arctic Ocean
Using machine learning to accurately simulate the oceanic barium distribution
Mete and colleagues used machine learning to predict the global distribution of oceanic barium…
Transient tracers, water mass ages and mixing time scales in the Arctic Ocean
Smith and colleagues determined iodine-129, chlorofluorocarbons and sulfur hexafluoride during three GEOTRACES cruises in the 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.
Shedding light on Arctic Mercury
New research is now shining a light on mercury cycling on the Arctic shelf.
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.
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.
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.
What controls the barium distribution in the Arctic Ocean?
They synthesized what controls the barium distribution in the Arctic Ocean.
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.
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.
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?
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…
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.
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.
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.
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
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
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
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 […]
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 […]
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
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 […]
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 […]
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 […]
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, […]
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 […]
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.
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 […]
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 […]