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Long time series of velocity profiles collected by up-looking acoustic profilers in the westernmost sill of the Strait of Gibraltar show an unexpected pattern in the deepest ∼80 m of the water column, consisting in an appreciable diurnal weakening of the measured horizontal velocity. A harmonic analysis performed on long time series reveals a surprising magnitude of S constituent (exactly 1 cpd of frequency) in the horizontal velocity and echo amplitude, which prevails over the rest of diurnal constituents within this depth range, including K, despite being around 200 times smaller than it in the tide generating potential. High resolution echograms collected by a new instrument recently installed in the mooring line, point at the diel vertical migration of living acoustic scatterers (zooplankton) as the most reasonable cause.
View Article and Find Full Text PDFThe 2024 report of the Lancet Countdown on health and climate change: facing record-breaking threats from delayed action.
Lancet
November 2024
Institute for Global Health, University College London, London, UK.
Article Synopsis
- The world is nearing the critical threshold of 1.5°C warming, with 2023 recording an average temperature rise of 1.45°C since pre-industrial times, leading to severe climate-related impacts.
- The Countdown collaboration, formed to assess the health impacts of climate change post-Paris Agreement, involves over 300 experts analyzing data and trends annually.
- The 2024 report highlights troubling increases in climate-related health risks, such as a staggering 167% rise in heat-related deaths among seniors, indicating worsening conditions affecting wellbeing globally.
Microplastics and low tide warming: Metabolic disorders in intertidal Pacific oysters (Crassostrea gigas).
Ecotoxicol Environ Saf
October 2024
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Integrative Ecophysiology, Am Handelshafen 12, Bremerhaven 27570, Germany. Electronic address:
Sessile intertidal organisms live in a harsh environment with challenging environmental conditions and increasing anthropogenic pressure such as microplastic (MP) pollution. This study focused on effects of environmentally relevant MP concentrations on the metabolism of intertidal Pacific oyster Crassostrea gigas, and its potential MP-induced vulnerability to warming during midday low tide. Oysters experienced a simulated semidiurnal tidal cycle based on their natural habitat, and were exposed to a mixture of polystyrene microbeads (4, 7.
View Article and Find Full Text PDFCultural roots of the myopia boom in Confucian Asia and their implications.
J Public Health Policy
December 2024
Centre for Clinical Brain Sciences, The University of Edinburgh, Edinburgh, UK.
Current evidence implicates educational pressures and reduced outdoor time as major causes of myopia. This paper examines the ongoing battle against the myopia epidemic in East Asia, including its cultural offshoots such as Singapore, where over 80% of young adults are myopic. East Asian societies share deeply rooted Confucian values that attach great importance to education and familial obligations, with heavy parental investment in education and the perception that academic excellence reflects filial piety.
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