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Related Concept Videos

Precipitation Processes01:12

Precipitation Processes

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The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

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Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
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Precipitation Gravimetry01:03

Precipitation Gravimetry

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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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Boundary Layer Characteristics01:18

Boundary Layer Characteristics

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When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
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Eulerian and Lagrangian Flow Descriptions01:22

Eulerian and Lagrangian Flow Descriptions

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Fluid flow analysis is critical in many scientific and engineering disciplines, and two principal approaches are used to describe this flow: the Eulerian and Lagrangian methods. These methods offer different perspectives on monitoring and analyzing the motion of fluids, each with distinct advantages depending on the scenario.
The Eulerian method focuses on fixed points in space where fluid properties, such as velocity, pressure, and temperature, are observed as the fluid moves between these...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

877
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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North Atlantic Extratropical Cyclone Tracks and Lagrangian-Derived Moisture Uptake Dataset.

Patricia Coll-Hidalgo1, Luis Gimeno-Sotelo2, José Carlos Fernández-Alvarez2,3

  • 1Centro de Investigación Mariña, Universidade de Vigo, Environmental Physics Laboratory (EPhysLab), Campus As Lagoas s/n, 32004, Ourense, Spain. patricia.coll@uvigo.gal.

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This study introduces a new dataset for North Atlantic extratropical cyclones (ETCs), detailing moisture uptake and storm structures. This resource aids research into ETCs, improving weather and climate models.

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Area of Science:

  • Meteorology
  • Climate Science
  • Atmospheric Science

Background:

  • Extratropical cyclones (ETCs) present complex challenges in weather and climate research, with poorly understood links between moisture uptake and precipitation across various mesoscale structures.
  • Understanding moisture transport and its role in ETC dynamics is crucial for improving meteorological predictions and climate projections.

Purpose of the Study:

  • To develop and release a comprehensive dataset of North Atlantic extratropical cyclone (ETC) tracks and associated moisture uptake parameters.
  • To provide shapefiles detailing ETC structures and validated moisture data derived from high-resolution reanalysis, facilitating further scientific investigation.

Main Methods:

  • Dynamically downscaled ERA5 reanalysis data were utilized to generate ETC tracks and a Lagrangian-Derived Moisture Uptake Dataset.
  • Moisture parameters, including total uptake and vertical distribution, were calculated and validated for accuracy and representativeness.

Main Results:

  • A validated database of North Atlantic ETC tracks and a novel Lagrangian-Derived Moisture Uptake Dataset are presented.
  • The dataset includes detailed moisture parameters and shapefiles of ETC structures, enabling in-depth analysis of moisture processes within cyclones.

Conclusions:

  • The released dataset offers valuable resources for the scientific community to study moisture dynamics in extratropical cyclones (ETCs).
  • This data facilitates a better understanding of ETCs, their associated meteorological fields, and their impact on weather and climate.