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Precession modulates the poleward expansion of atmospheric circulation to the Arctic Ocean.
Nat Commun
January 2025
Centre for Marine Magnetism (CM2, Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
Under sustained global warming, Arctic climate is projected to become more responsive to changes in North Pacific meridional heat transport as a result of teleconnections between low and high latitudes, but the underlying mechanisms remain poorly understood. Here, we reconstruct subarctic humidity changes over the past 400 kyr to investigate the role of low-to-high latitude interactions in regulating Arctic hydroclimate. Our reconstruction is based on precipitation-driven sediment input variations in the Subarctic North Pacific (SANP), which reveal a strong precessional cycle in subarctic humidity under the relatively low eccentricity variations that dominated the past four glacial-interglacial cycles.
View Article and Find Full Text PDFThe Ronne Ice Shelf survived the last interglacial.
Nature
January 2025
Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand.
The fate of the West Antarctic Ice Sheet (WAIS) is the largest cause of uncertainty in long-term sea-level projections. In the last interglacial (LIG) around 125,000 years ago, data suggest that sea level was several metres higher than today, and required a significant contribution from Antarctic ice loss, with WAIS usually implicated. Antarctica and the Southern Ocean were warmer than today, by amounts comparable to those expected by 2100 under moderate to high future warming scenarios.
View Article and Find Full Text PDFOxidation state of bioavailable dissolved organic matter influences bacterioplankton respiration and growth efficiency.
Commun Biol
January 2025
Marine Science Institute/Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, USA.
Oxygen consumption by oceanic microbes can predict respiration (CO production) but requires an assumed respiratory quotient (RQ; ΔO/ΔCO). Measured apparent RQs (ARQs) can be impacted by various processes, including nitrification and changes in dissolved organic matter (DOM) composition, leading to discrepancies between ARQ and actual RQ. In DOM remineralization experiments conducted in the eastern North Atlantic Ocean, ARQs averaged 1.
View Article and Find Full Text PDFDistribution and Fasciola infection rates of Lymnaea snails and cattle in high-salinity areas of Mekong Delta, Vietnam.
J Vet Med Sci
January 2025
Laboratory of Global Animal Resource Science, Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo.
Fasciola-induced fascioliasis is a zoonotic disease with significant health and economic impacts on humans and livestock. Freshwater Lymnaea snails serve as intermediate hosts, contributing to the increasing prevalence of fascioliasis in cattle in coastal areas. The salinity tolerance of Lymnaea snails was investigated along with their distribution and Fasciola infection rates in both snails and grazing cattle in Ben Tre, Tra Vinh, and Soc Trang provinces in Mekong Delta, Vietnam, where seawater reversely enters into the paddy field during the dry season.
View Article and Find Full Text PDFShort-term negative effects of seawater acidification on the rhodolith holobionts metatranscriptome.
Sci Total Environ
January 2025
Laboratório de Microbiologia, Programa de pós-graduação em Ciências Biológicas (Genética), Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, RJ, Brazil. Electronic address:
Rhodolith holobionts are formed by calcareous coralline algae (e.g., Corallinales) and associated microbiomes.
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