Nicolas Gruber

Nov 27, 2024 | science.org | Qingshu Meng |Jens Müller |Anjali Verma |Nicolas Gruber

AbstractOcean acidification driven by the uptake of anthropogenic CO2 represents a major threat to ocean ecosystems, yet little is known about its progression beneath the surface. Here, we reconstruct the history of ocean interior acidification over the industrial era on the basis of observation-based estimates of the accumulation of anthropogenic carbon.

Jan 11, 2024 | eos.org | Nicolas Gruber

What goes down must come back up. While much research effort has been spent on understanding how the ocean is producing the dense waters that flow into the abyss, much less is known about how the waters come back up. Using an ultra-high-resolution regional model of the Drake Passage region in the Southern Ocean, Baker et al. [2023] show that a crucial first step in this journey back up is the mixing of freshly formed Antarctic Bottom Waters with lighter waters above.

Jan 10, 2024 | eos.org | Nicolas Gruber

Biological productivity in the ocean would rapidly wane if the nitrogen that is lost from the surface as a consequence of the marine biological pump was not resupplied back to the surface. However, the mechanisms responsible for the upward transport of this nitrogen are not well quantified. Marshall et al. [2023] take advantage of the dual isotopic signature of nitrate (oxygen-18 and nitrogen-15) to trace the injection of new nitrate into the upper ocean.

Sep 22, 2023 | phys.org | Nicolas Gruber

An extraordinary heat wave is assailing the world's oceans with an intensity that is surprising climate researchers. Environmental physicist Nicolas Gruber provides some context. Record temperatures in the Mediterranean. Huge heat wave in the North Atlantic.