Why did the concentration of atmospheric carbon dioxide rise so much and so quickly during the last deglaciation? 

Science Highlights

6 March 2018

During the Last Glacial Maximum, the deep southern Pacific waters were stratified, efficiently accumulating old, CO2 rich waters. Basak and co-authors (2018, see reference below) measured neodymium isotopes in sediment cores that clearly show that when these deep waters became less stratified as the climate warmed they released their carbon which could escape to the atmosphere…what a tempting prospect and beautiful teaser for the forthcoming PAGES-GEOTRACES workshop of December 2018!

 Figure: View from RV Polarstern while collecting sediment samples used in the study by Basak et al. Read more at: https://phys.org/news/2018-02-scientists-theory-role-south-pacific.html#jCp
Credit: Dr. Katharina Pahnke

Reference:

Basak, C., Fröllje, H., Lamy, F., Gersonde, R., Benz, V., Anderson, R. F., Molina-Kescher, M., Pahnke, K. (2018). Breakup of last glacial deep stratification in the South Pacific. Science, 359(6378), 900–904. http://doi.org/10.1126/science.aao2473

Read more also at: https://phys.org/news/2018-02-scientists-theory-role-south-pacific.html#jCp

Latest highlights

The Amazonian mangrove systems accumulate and release dissolved neodymium and hafnium to the oceans

Xu and colleagues investigated the concentrations of rare earth elements in the Amazonian mangrove.

Biological production of ligands influences iron chemistry in hydrothermal systems

For the first time, siderophores and siderophore-producing microbes were determined in 11 distinct hydrothermal plume environments.

Nutrient-OMICS coupling approach reveals unexpected actors for atmospheric carbon sequestration

Sharma and colleagues investigated the role of clay minerals in strengthening the marine biological pump.

Distribution and fate of the lithogenic and anthropogenic aerosols over the Mediterranean and Black Seas

Shelley and co-authors propose an extensive coverage of the distribution and fate of the lithogenic and anthropogenic aerosols over the Mediterranean and Black Seas.

Rechercher