Compositional and Mineralogical Effects on Ice Nucleation Activity of Volcanic Ash

Genareau, Kimberly; Cloer, Shelby; Primm, Katherine; Tolbert, Margaret; Woods, Taylor

doi:10.3390/atmos9070238

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Compositional and Mineralogical Effects on Ice Nucleation Activity of Volcanic Ash

2018
By Genareau, Kimberly ; Cloer, Shelby ; Primm, Katherine ; ...
Source: Atmosphere 2018, 9(7), 238

[PDF-830.89 KB]

Details Related Documents You May Also Like

Details:

Journal Title:

Atmosphere
Personal Author:

Genareau, Kimberly ; Cloer, Shelby ; Primm, Katherine ; Tolbert, Margaret ; Woods, Taylor

Genareau, Kimberly ; Cloer, Shelby ; Primm, Katherine ; Tolbert, Margaret ; Woods, Taylor Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
Description:

Volcanic ash produced during explosive eruptions may serve as ice nuclei in the atmosphere, contributing to the occurrence of volcanic lightning due to tribocharging from ice–ice or ice–ash collisions. Here, different ash samples were tested using deposition-mode and immersion-mode ice nucleation experiments. Results show that bulk composition and mineral abundance have no measurable effect on depositional freezing at the temperatures tested, as all samples have similar ice saturation ratios. In the immersion mode, there is a strong positive correlation between K2O content and ice nucleation site density at −25 °C and a strong negative correlation between MnO and TiO2 content at temperatures from −35 to −30 °C. The most efficient sample in the immersion mode has the highest surface area, smallest average grain size, highest K2O content, and lowest MnO content. These results indicate that although ash abundance—which creates more available surface area for nucleation—has a significant effect on immersion-mode freezing, composition may also contribute. Consequently, highly explosive eruptions of compositionally evolved magmas create the necessary parameters to promote ice nucleation on grain surfaces, which permits tribocharging due to ice–ice or ice–ash collisions, and contribute to the frequent occurrence of volcanic lightning within the eruptive column and plume during these events.
Keywords:

[+]

Ice Volcanic Ash, Tuff, Etc
Source:

Atmosphere 2018, 9(7), 238
DOI:

https://doi.org/10.3390/atmos9070238
Document Type:

Journal Article
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:d27466f263b35dcaa5135da1fd5f33dbd5fedaff548336cd04ad7d67ca57db14
Download URL:

https://repository.library.noaa.gov/view/noaa/26547/noaa_26547_DS1.pdf
File Type:

No Additional Files

More +

Compositional and Mineralogical Effects on Ice Nucleation Activity of Volcanic Ash

Details:

Supporting Files

Related Documents

You May Also Like