New papers on Oceans & water
18 new papers on oceans & water in the last 7 days, within Earth & climate. These are the 18 Pipette rates most worth reading, with the main result in the authors' own words.
The best of the week
Global dispersal of macroalgae-derived recalcitrant DOC may substantially contribute to deep-ocean carbon storage
The detection of candidate kelp-associated RDOC signals throughout the global ocean provides molecular-level evidence of the long-distance export of macroalgae-derived RDOC to the pelagic and deep ocean, highlighting a major, previously unrecognized pathway of long-term storage of macroalgae-derived DOC in global oceans, although the precise fraction exported to the deep ocean remains to be quantified.
Peer-reviewed journalBold claims, read criticallyClaims a big stepEnglacial authigenesis in deep Antarctic ice: implications for Martian dust oxidation
Here we show that englacial authigenesis is documented across different Antarctic deep ice cores and involves the formation of mineral phases such as goethite/lepidocrocite and hematite/maghemite, in addition to jarosite.
Peer-reviewed journalBold claims, read criticallyBroad interestClimate change is projected to widen global inequalities in ocean-derived wellbeing
We find that although the historical assessment reveals an improvement in the global average BWI score from 2000 to 2021, future projections under high-emission climate scenarios (SSP5-8.5) indicate disproportionate losses across 143 countries.
Peer-reviewed journalReal-world useUpscaling sediment source prediction for watershed management
To address this, we compiled a global synthesis of 142 sediment tracing studies across 267 watersheds and developed an explainable machine learning framework that predicts sediment provenance using remotely sensed attributes.
Peer-reviewed journalReal-world useGlobal carbon dioxide flux into the surface ocean intensified by rain-induced dilution
Here we present a global analysis of rain effects on CO2 exchange employing the most realistic available model of rain-induced dilution for high-resolution satellite datasets, yielding a total rain-induced increase in ocean uptake of 13.6% relative to a wind-only effect.
Peer-reviewed journalHClimRep-Ocean: A Global Ocean Emulator on an Unstructured Mesh
We present HClimRep-Ocean, an ocean emulator that operates directly on the native unstructured mesh of FESOM2.
PreprintCoupled increases in pelagic fish productivity and export productivity during the Paleocene-Eocene Thermal Maximum
We find a widespread increase in pelagic fish productivity, particularly in the Pacific and North Atlantic, that closely tracks export productivity in trend and spatial pattern, suggesting this increase was fueled by enhanced carbon export from the surface ocean.
Peer-reviewed journalHypoxia and acidification antagonistically suppress nitrification but enhance its N 2 O production in coastal waters
Here, we demonstrate that along the estuarine-coastal continuum, the co-occurrence of hypoxia and acidification suppresses nitrification rates but stimulates nitrification-derived N 2 O emissions—although their combined effect is lesser than the sum of their individual effects.
Peer-reviewed journalReal-world useSatellite reveals a world of altered rivers
SWOT is exposing how humans reshape rivers-and challenging models used to predict floods.
Peer-reviewed journalReal-world useEasy to readAbrupt pH changes overestimate the responses of Chaetoceros muelleri to ocean acidification
Integrating evolutionary genomics, physiological assays, elemental stoichiometry, and Earth System Modeling, we find that abrupt acidification exaggerates diatom growth and carbon fixation responses by up to 15%, driven by enhanced divergent genomic signals and persistent gene expression changes.
Peer-reviewed journalBlinded Evaluation of Oceanic Sound Source Locations via Sequential Bound Estimation
A blind evaluation revealed all 219 explosions were within their CIL.
PreprintBarrier island geomorphic complexity drives storm and post-storm response
Here, shoreface-inclusive measurements of barrier sediment fluxes over five years following an extreme storm reveal distinct sediment redistribution patterns that vary with island geomorphology.
Peer-reviewed journalReal-world useA River Wave framework to unify river ecosystem concepts and predict ecological change
Our case study contrasted Sweden’s fragmented rivers with modelled free-flowing conditions and found that the observed fragmented rivers may favour specific fish life history strategies, that ecosystem functioning has shifted towards more baseflow-dominated flow compared with free-flowing rivers and that restoring all rivers to free-flowing conditions would result in more similar rivers nationally.
Peer-reviewed journalReal-world useSpring phytoplankton bloom dynamics reveal thresholds of ocean alkalinity enhancement in the North Sea
These findings identify critical alkalinity thresholds for phytoplankton bloom development in temperate, diatom-dominated spring blooms, informing boundaries for ecologically safe deployment.
Peer-reviewed journalReal-world useCosmogenic radiocarbon production and glacial cycles control marine radiocarbon archive variations
Short-term reservoir age variations are dominated by changes in cosmogenic radiocarbon production, while glacial-interglacial climate variations exert slower and damped effects.
Peer-reviewed journalDiffusion-Based Super-Resolution of Adriatic Sea Oceanographic Fields
We present OcDiffSR, a conditional denoising diffusion probabilistic model (DDPM) for oceanographic super-resolution that reconstructs high-resolution sea-surface fields from coarse-resolution reanalysis inputs.
PreprintReal-world useConservation Constraints and Distributed Advective Memory in a Reduced Model of Atlantic Overturning Hysteresis
The gateway therefore enters as a purely additive forcing and cannot renormalize the salt-advection feedback.
PreprintSurface Stokes drift from compact drifting wave buoys
We derive surface Stokes drift vectors from wave measurements collected by compact drifting buoys during three deployments in the North-East Atlantic and the Alboran Sea.
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