Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Precipitation Processes01:12

Precipitation Processes

574
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...
574
Types of Coprecipitation01:10

Types of Coprecipitation

824
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
824
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

2.0K
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...
2.0K
Coagulation01:06

Coagulation

362
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
362
Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

934
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
934
Cohesion01:07

Cohesion

55.4K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
55.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Cluster assembly dynamics drive fidelity of planar cell polarity polarization.

Nature communications·2026
Same author

Cell autonomous polarization by the planar cell polarity signaling pathway.

Nature communications·2025
Same author

Super-Clausius-Clapeyron scaling of extreme precipitation explained by shift from stratiform to convective rain type.

Nature geoscience·2025
Same author

Cluster Assembly Dynamics Drive Fidelity of Planar Cell Polarity Polarization.

bioRxiv : the preprint server for biology·2024
Same author

Stochastic microbial dispersal drives local extinction and global diversity.

Royal Society open science·2024
Same author

Protein phosphatase 1 regulates core PCP signaling.

EMBO reports·2023

Related Experiment Video

Updated: Sep 4, 2025

Author Spotlight: Advancing Research in Microbial Autoaggregation Using Imaging Flow Cytometry
05:19

Author Spotlight: Advancing Research in Microbial Autoaggregation Using Imaging Flow Cytometry

Published on: September 29, 2023

869

Circling in on Convective Self-Aggregation.

Silas Boye Nissen1, Jan O Haerter1,2,3

  • 1Niels Bohr Institute University of Copenhagen Copenhagen Denmark.

Journal of Geophysical Research. Atmospheres : JGR
|July 22, 2022
PubMed
Summary
This summary is machine-generated.

Convective self-aggregation (CSA) arises from interacting cold pools (CPs). Reducing CP size accelerates CSA, suggesting CP interactions initiate this phenomenon in simulations.

Keywords:
cloud‐free regioncold poolsconvectionconvective self‐aggregationgust frontsprecipitation

More Related Videos

Detecting and Characterizing Protein Self-Assembly In Vivo by Flow Cytometry
05:58

Detecting and Characterizing Protein Self-Assembly In Vivo by Flow Cytometry

Published on: July 17, 2019

11.1K
Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
10:17

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

3.3K

Related Experiment Videos

Last Updated: Sep 4, 2025

Author Spotlight: Advancing Research in Microbial Autoaggregation Using Imaging Flow Cytometry
05:19

Author Spotlight: Advancing Research in Microbial Autoaggregation Using Imaging Flow Cytometry

Published on: September 29, 2023

869
Detecting and Characterizing Protein Self-Assembly In Vivo by Flow Cytometry
05:58

Detecting and Characterizing Protein Self-Assembly In Vivo by Flow Cytometry

Published on: July 17, 2019

11.1K
Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
10:17

Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly

Published on: November 4, 2021

3.3K

Area of Science:

  • Atmospheric Science
  • Climate Modeling
  • Meteorology

Background:

  • Convective self-aggregation (CSA) describes the spontaneous organization of clouds and clear skies in simulations.
  • The mechanisms driving the initial development of CSA on large domains remain unclear, despite understanding its stabilization.

Purpose of the Study:

  • To investigate the role of cold pool (CP) interactions in the initiation of convective self-aggregation (CSA).
  • To determine how CP characteristics influence the onset and development of CSA in large-domain simulations.

Main Methods:

  • Utilized large-eddy simulations to model atmospheric convection.
  • Systematically manipulated rain evaporation to alter maximal cold pool radii ().
  • Developed a conceptual model incorporating CP generation time and suppression radius () to explain CSA emergence.

Main Results:

  • Reduced maximal cold pool radii () led to earlier onset of convective self-aggregation (CSA).
  • Identified a characteristic rain cell generation time and a minimum radius () suppressing new cell formation.
  • A toy model demonstrated that colliding cold pools can trigger new convective events, advancing CSA.

Conclusions:

  • Cold pool interactions are a key factor in the initial stages of convective self-aggregation.
  • The size and interaction dynamics of cold pools significantly influence the timing of CSA development.
  • Findings suggest a mechanism for how CSA emerges on large computational domains.