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Electrodynamic Levitation Diffusion Chamber Measurements of the Mass Growth of Heterogeneously-Nucleated Ice Crystals Grown from the Vapor.

• Identification_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:The Pennsylvania State University

Publication_Date:2018

Title:

Electrodynamic Levitation Diffusion Chamber Measurements of the Mass Growth of Heterogeneously-Nucleated Ice Crystals Grown from the Vapor.

Other_Citation_Details:

Pokrifka, G., 2018: Using Laboratory Measurements of Vapor-Grown Ice Crystals to infer Surface Kinetics and Estimate the Deposition Coefficient. M.S. Thesis, The Pennsylvania State University, 2018, 89pp.

Online_Linkage: http://www.datacommons.psu.edu/

Description:

Abstract:

This data set comprises individual time-series for ice crystals grown in an electrodynamic levitation diffusion chamber at temperatures between -36C and -44C. Descriptions of the chamber and experiments can be found in Pokrifka (2018). Experiments were conducted by freezing small (approximately 10 micrometer radius) droplets homogeneously. Frozen droplets were levitated in the diffusion chamber and grown in a constant temperature, pressure, and supersaturation environment. The voltage ratio needed to levitate the particle was recorded as a function of time and stored in the files archived here. The voltage ratio is identical to the mass ratio of the levitated particles, hence each time-series provides a measure of the mass of the growing particle. The initial size of the injected droplet was measured, and therefore the mass time-series can be calculated from the mass ratio time-series.

Supplemental_Information:

This directroy constains timeseries data from homogeneously-frozen water droplets growing from vapor.

The condition for each experiment are listed in the conditions.dat file, with the columns containing the following:

experiment number,
initial particle radius (microns) as determined from Mie scattering defraction patterns,
uncertainty in the initial particle radius (+- microns),
temperature (C) at the particle location,
ice supersaturation (%) at the particle location as determined by a diffusion chamber model,
uncertainty in the supersaturation (+- %).

In all cases, the temperature uncertainty is +- 0.1C, and the pressure is about 970 hPa.


Datafiles for each experiments are named as "(experiment number)-mass.dat". The columns within these files are the following:

time elapsed (s),
particle radius (m),
mass ratio (mass divided by initial mass),
particle volume (m^3),
particle mass (kg).

Calculations to determine the particle radius, volume, and mass assumed the particle to be a solid ice sphere.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:2018

Currentness_Reference:

publication date

Keywords:

Theme:

Theme_Keyword_Thesaurus:ISO 19115 Topic Categories

Theme_Keyword:Ice crystal growth, ice clouds, diffusion chamber experiments

Theme_Keyword:environment

Access_Constraints:None.

Use_Constraints:

The University excludes any and all implied warranties, including warranties or merchantability and fitness for a particular purpose.
The University makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance.
The University will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
The USER is granted permission to translate and add value to the FILES for the use of the FILES on its computer hardware; provided, however, that the USER annually notify the University of any customizing or value-adding work done.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Penn State

Contact_Person:Jerry Y. Harrington

Contact_Position:Professor of Meteorology

Contact_Address:

Address_Type:mailing address

Address:

517 Walker Building

City:University Park

State_or_Province:Pennsylvania

Postal_Code:16802

Country:USA

Contact_Voice_Telephone:(814) 863-1584

Contact_Electronic_Mail_Address:jyh10@psu.edu

Native_Data_Set_Environment:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Organization:Penn State Data Commons

Contact_Address:

Address_Type:mailing and physical address

Address:

115 Land and Water Building

City:University Park

State_or_Province:Pennsylvania

Postal_Code:16802

Country:United States

Contact_Voice_Telephone:(814) 865 - 8792

Contact_Electronic_Mail_Address:datacommons@psu.edu

Distribution_Liability:

The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.

Metadata_Reference_Information:

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Penn State Data Commons

Contact_Position:Metadata Coordinator

Contact_Address:

Address_Type:mailing address

Address:

115 Land and Water Building

City:University Park

State_or_Province:Pennsylvania

Postal_Code:16802

Country:United States

Contact_Voice_Telephone:814-865-8792

Contact_Electronic_Mail_Address:datacommons@psu.edu

Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time