The Subantarctic Southern Ocean has long been thought to be an important contributor to increases in atmospheric carbon dioxide partial pressure (pCO) during glacial-interglacial transitions. Extensive studies suggest that a weakened biological pump, a process associated with nutrient utilization efficiency, drove up surface-water pCO in this region during deglaciations. By contrast, regional influences of the solubility pump, a process mainly linked to temperature variations, have been largely overlooked. Here, we evaluate relative roles of the biological and solubility pumps in determining surface-water pCO variabilities in the Subantarctic Southern Ocean during the last deglaciation, based on paired reconstructions of surface-water pCO, temperature, and nutrient utilization efficiency. We show that compared to the biological pump, the solubility pump imposed a strong impact on deglacial Subantarctic surface-water pCO variabilities. Our findings therefore reveal a previously underappreciated role of the solubility pump in modulating deglacial Subantarctic CO release and possibly past atmospheric pCO fluctuations.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9440897 | PMC |
| http://dx.doi.org/10.1038/s41467-022-32895-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Fabrication and optimization of a multielectrode microfluidic electrochemical flow cell for fast and dynamic detection of reaction products.
MethodsX
June 2025
Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), NO-7491, Trondheim, Norway.
Construction and experimental validation of electrochemical cells with multiple electrodes in a microfluidic channel is described. Details of the fabrication of the electrodes and polydimethylsiloxane channel using soft lithography methods are given. Calibration of the collection efficiencies and transit times between electrodes validate the use of these cells for fast electrochemical detection of soluble species.
View Article and Find Full Text PDFSpontaneous Bubble Growth Inside High-Saturation-Vapor-Pressure and High-Air-Solubility Liquids and Emulsion Droplets.
Langmuir
January 2025
Department of Chemical and Pharmaceutical Engineering, Faculty of Chemistry and Pharmacy, Sofia University, 1 James Bourchier Avenue, Sofia 1164, Bulgaria.
Spontaneous bubble growths in liquids are usually triggered by rapid changes in pressure or temperature that can lead to liquid gas supersaturation. Here, we report alternative scenarios of the spontaneous growths of bubbles inside a high-saturation-vapor-pressure and high-air-solubility perfluorocarbon liquid (PP1) that were observed under ambient quiescent conditions. First, we investigate spontaneous bubble growth inside the single PP1 phase, which was left to evaporate freely.
View Article and Find Full Text PDFRAFT Dispersion Polymerization of 2-Hydroxyethyl Methacrylate in Non-polar Media.
Macromolecules
December 2024
Dainton Building, Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, U.K.
We report the reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of 2-hydroxyethyl methacrylate (HEMA) in -dodecane using a poly(lauryl methacrylate) (PLMA) precursor at 90 °C. This formulation is an example of polymerization-induced self-assembly (PISA), which leads to the formation of a colloidal dispersion of spherical PLMA-PHEMA nanoparticles at 10-20% w/w solids. PISA syntheses involving polar monomers in non-polar media have been previously reported but this particular system offers some unexpected and interesting challenges in terms of both synthesis and characterization.
View Article and Find Full Text PDFHigh-light and nutrient interactions drive carbohydrate and proton pump dynamics in Agastache rugosa (Fisch. & C.A.Mey.) Kuntze.
Plant Physiol Biochem
December 2024
Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia.
Agastache rugosa, a perennial herb native to temperate and subtropical regions, shows remarkable adaptive strategies when exposed to varying light and nutrient conditions in tropical environments. Our study reveals new insights into the crosstalk mechanisms involving carbohydrate homeostasis, biomass allocation, and nutrient acquisition in A. rugosa under different environmental conditions.
View Article and Find Full Text PDFEffect of osmotic dehydration with binary/ternary sugar solutes on macro-& micro-structure, chromaticity and thermal stability of dehydrated peach slices prepared by heat pump drying.
Food Chem
March 2025
Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China. Electronic address:
The binary solution (sucrose/erythritol solution) and ternary solution (compound sucrose/erythritol with maltitol/fructooligosaccharide) were prepared as osmotic dehydration (OD) pretreatment before hot-pump-dried (HPD). Based on the analysis of OD solutions, the analysis of quality of dehydrated yellow peach slices (DYPS) were emphasized on the soluble sugar content, macro-µ-structure and thermal stability. Following with sucrose and maltitol (SM)-OD pretreatment, DYPS showed the decreased free sugar content and improved cohesiveness (0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!