This FITCH_readme_20220206.txt file was generated on 20220206 by Kyle Fitch ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Alta data for "Measurement and Analysis for the Parameterization of Arctic Snow with Frequent Occurrence of Riming" 2. Author Information Fitch, Kyle E. and Timothy J. Garrett Principal Investigator Contact Information Name: Tim Garrett Institution: Dept. of Atmospheric Sciences, University of Utah Address: 135 S 1460 E, William Browning Building Email: tim.garrett@utah.edu Associate or Co-investigator Contact Information Name: Kyle Fitch Institution: Dept. of Engineering Physics, Air Force Institute of Technology Address: 2950 Hobson Way, Wright-Patterson Air Force Base, OH 45433 Email: kyle.fitch@afit.edu Alternate Contact Information Name: Institution: Address: Email: 3. Date of data collection (single date, range, approximate date) From 20130107 to 20130422 4. Geographic location of data collection (where was data collected?): Alta Base (Alta Ski Area), Alta, Utah 5. Information about funding sources that supported the collection of the data: This work is supported by the U.S. Department of Energy (DOE) Atmospheric System Research program (DE-SC0016282) and the National Science Foundation, Division of Atmospheric and Geospace Sciences (grant no. 1841870). -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: CC BY-Allows others to use and share your data, even commercially, with attribution 2. Links to publications that cite or use the data: Garrett, T. J., and Yuter, S. E. (2014), Observed influence of riming, temperature, and turbulence on the fallspeed of solid precipitation, Geophys. Res. Lett., 41, 6515– 6522, https://doi.org/10.1002/2014GL061016 Fitch, Kyle E. and Timothy J. Garrett. 2022. Measurement and Analysis for the Parameterization of Arctic Snow with Frequent Occurrence of Riming. Journal of Geophysical Research - Atmospheres TBD 3. Links to other publicly accessible locations of the data: None 4. Links/relationships to ancillary data sets: None 5. Was data derived from another source? If yes, list source(s): These output data are the result of processing with the masclab software suite: https://github.com/Fall-tech/masclab. 6. Recommended citation for the data: Fitch, Kyle E. and Timothy J. Garrett. 2022. Alta data for "Measurement and Analysis for the Parameterization of Arctic Snow with Frequent Occurrence of Riming". The Hive: University of Utah Research Data Repository. https://doi.org/10.7278/S50d-0nmg-6bs4 --------------------- DATA & FILE OVERVIEW --------------------- 1. File List Alta_data.dat 2. Relationship between files: Only one file 3. Additional related data collected that was not included in the current data package: None 4. Are there multiple versions of the dataset? no If yes, list versions: Name of file that was updated: i. Why was the file updated? ii. When was the file updated? Name of file that was updated: i. Why was the file updated? ii. When was the file updated? -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Alta data include measurements from the Multi-Angle Snowflake Camera (MASC) and temperature & wind sensors, all located at the Alta Ski Area in Alta, Utah. 2. Methods for processing the data: MASC measurements are output after processing with the masclab suite: https://github.com/Fall-tech/masclab 3. Instrument- or software-specific information needed to interpret the data: The technical specifications of the MASC are documented in the DOE ARM Multi-Angle Snowflake Camera Instrument Handbook provided and located at https://www.arm.gov/publications/tech_reports/handbooks/masc_handbook.pdf Additionally, particle variables are described in the DOE ARM MASC Particle Analysis Value-Added Product document: https://www.arm.gov/publications/tech_reports/doe-sc-arm-tr-187.pdf 4. Standards and calibration information, if appropriate: See #3 above 5. Environmental/experimental conditions: Temperature and wind speed are included. 6. Describe any quality-assurance procedures performed on the data: MASC quality control as described in MASC Handbook: https://www.arm.gov/publications/tech_reports/handbooks/masc_handbook.pdf Furthermore, erroneous data exists for the following four periods: 29 Jan 2013 05:28:49 to 05:28:50 (snow drop) 30 Jan 2013 21:44:00 to 31 Jan 2013 12:00:00 (flapping tape) 12 Feb 2013 10:48:00 to 10:49:50 (side tape) 24 Mar 2013 07:40:00 to 07:41:00 (snow drop) 7. People involved with sample collection, processing, analysis and/or submission: The data collection/processing was accomplished primarily by Tim Garrett, with help from Cale Fallgatter, Konstantin Shkurko, Daniel Howlett, Sandra Yuter, and Kyle Fitch. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: ALTA_DATA.DAT ----------------------------------------- 1. Number of variables: 16 2. Number of cases/rows: 202,145 3. Variable List A. Name: Year (column 1) Description: Year of measurement Format: YYYY B. Name: Month (column 2) Description: Month of measurement Format: MM C. Name: Day (column 3) Description: Day of measurement Format: DD D. Name: Hour (column 4) Description: Hour of measurement Format: hh (0 to 23) E. Name: Minute (column 5) Description: Minute of measurement Format: mm (0 to 59) F. Name: Second (column 6) Description: Second of measurement Format: ss.sss (0.000 to 59.999) G. Name: Velocity (column 7) Description: Particle velocity (positive downward) Units: m/s H. Name: Aspect Ratio (column 8) Description: Particle aspect ratio (minimum dimension/maximum dimension) Units: unitless I. Name: Complexity (column 9) Description: Particle complexity Units: unitless J. Name: Orientation Angle (column 10) Description: Particle orientation angle (absolute value with respect to horizontal) Units: degrees (0 to 90) K. Name: Flatness (column 11) Description: Particle flatness (only when 3 good images are available) Units: unitless L. Name: Maximum Dimension (column 12) Description: Particle maximum dimension (major axis of best-fit ellipse) Units: mm M. Name: Perimeter (column 13) Description: Particle perimeter (length of contour of particle edge) Units: mm N. Name: Area-Equivalent Radius (column 14) Description: Particle area-equivalent radius (radius of circle with equal area) Units: mm O. Name: Temperature (column 15) Description: Temperature at Alta Base surface Units: (degrees C) P. Name: Wind Speed (column 16) Description: Wind speed at Alta Base surface Units: m/s 4. Missing data codes: -50.00 missing data 5. Specialized formats of other abbreviations used None