Publications by authors named "C B Wohl"

Ocean-emitted dimethyl sulfide (DMS) is a major source of climate-cooling aerosols. However, most of the marine biogenic sulfur cycling is not routed to DMS but to methanethiol (MeSH), another volatile whose reactivity has hitherto hampered measurements. Therefore, the global emissions and climate impact of MeSH remain unexplored.

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Article Synopsis
  • Reactive trace gas emissions like benzene and toluene from polar oceans impact atmospheric chemistry and climate, yet they are not well-studied.
  • Measurements in the Southern Ocean and Arctic suggest these gases have a marine biogenic source, with calculated emission fluxes.
  • Incorporating these emissions into climate models showed a significant increase in secondary organic aerosol concentrations, especially in the Southern Ocean, highlighting the need to address these emissions in climate assessments.
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The flux of CO between the atmosphere and the ocean is often estimated as the air-sea gas concentration difference multiplied by the gas transfer velocity (K). The first order driver for K over the ocean is wind through its influence on near surface hydrodynamics. However, field observations have shown substantial variability in the wind speed dependencies of K.

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Background: Interventions to promote physical activity in nursing homes are among the priorities of German long-term care insurance funds. We summarized the evidence on the effectiveness of such interventions.

Methods: We conducted a systematic literature search in five electronic databases in November 2019, which was complemented by searching reference lists and trials registries.

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A colloidal probe, comprising a colloidal particle attached to an atomic force microscope cantilever, is employed to measure interaction forces between the particle and a surface. It is possible to change or even destroy a particle while attaching it to a cantilever, thus limiting the types of systems to which the colloidal probe technique may be applied. Here, we present the Controlled Heating and Alignment Platform (CHAP) for fabricating colloidal probes without altering the original characteristics of the attached particle.

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