Published April 11, 2022 | Version v2
Dataset Metadata-only

UCLALES-SALSA outputs for the manuscript "Aerosol-stratocumulus interactions: Towards better process understanding using closures between observations and large eddy simulations"

Creators

  • 1. Finnish Meteorological Institute

Contributors

Description

This data set contains UCLALES-SALSA simulation outputs used in a closure study of aerosol-cloud interactions during stratocumulus formation using in situ observations from the 2020 cloud sampling campaign at the Puijo SMEAR IV station in Kuopio, Finland (62.9092o 27.6556o, 306 m above mean sea level, 225 m above local lake level, FMISID: 101587, LPNN: 3618). Case studies occurred in September, 24th, 2020 from 07:54 to 12:49 (UTC+2) and in October, 31st, 2020 from 00:35 to 06:35. Both cases correspond to single-layer clouds topped by clear sky conditions.

Methods

Large-eddy-simulations were performed with UCLALES-SALSA (DEV version 17.08.2021) available from https://github.com/UCLALES-SALSA/UCLALES-SALSA/tree/DEV). Simulations ran in parallel using 64 processors in 2 nodes. Sub-domain outputs were merged using post-processing code included in https://github.com/UCLALES-SALSA/UCLALES-SALSA/tree/DEV/les-post-processing. A detailed description of model inputs is given in the NAMELIST file of each simulation.

Technical info

The model domain contain 64 by 64 by 120 grid points with horizontal and vertical resolution of 30 m and 10 m, respectively. The final size of the horizontal model domain is 1.92 km by 1.92 km and extends up to 1.2 km in altitude. Latitude at the Puijo station was set to be 62.53 degrees. Simulations were started two hours before the beginning of the period of interest, the 1st hour was set as spin-up period and data analysis started after the end of the 2nd hour to match local time. Simulated lasted for 7 hours in total for the case of 24-09-2020, and 8 hours in total for the case of 31-10-2020. Every simulation was initialized combining meteorological data from the Savilahti and Vehmasmäki stations, 2 km southwest and 13 km southwest to the Puijo station, respectively. Data from ECMWF-ERA 5 was used when observations were not available. Simulated properties at all grid points of the model domain were taken as snapshots every minute. The size of these data files is not suitable for this data repository. Link to external sources are provided. Simulations for every case study comprise a base scenario and alternative scenarios used to assess the model sensitivity to variations in conditions used for initialization. All data included here is analyzed in the manuscript "Aerosol-stratocumulus interactions: Towards better process understanding using closures between observations and large eddy simulations", submitted to the peer-reviewed journal "Atmospheric Chemistry and Physics" (OCLC number 57509369). As a side note, observations used in the closure study from Halo doppler lidar and cloud radar are available from the Aerosol, Clouds and Trace Gases-ACTRIS data centre: -CLU (2002) Cloud profiling products: Classification, Drizzle, Ice water content, Liquid water content, Categorize; cloud profiling measurements: Lidar, Radar; harmonie-fmi-6-11 model data. Cloudnet Collection from 2020-09-10 to 2020-12-01 at the Savilahti Station, Kuopio Finland. https://hdl.handle.net/21.12132/2.ef1a7d312c8a402d. Observations of hydrometeors size distributions are available after request to the authors and presented in - Tiitta, P., Leskinen, A., Kaikkonen, V., Molkoselkä, E., Mäkynen, A., Joutsensaari, J., Calderon, S., Romakkaniemi, S., & Komppula, M. (2022). Intercomparison of holographic imaging and single-particle forward light scattering in-situ measurements of liquid clouds in changing atmospheric conditions. Atmospheric Measurement Techniques Discussions, 2022, 1–20. https://doi.org/10.5194/amt-2021-423

Table of contents

The data set is divided in five containers , each one of them is labeled with the date of the cloud event and the identification of the simulation scenario as "YYYYMMDD_scenario", YYYY as year, MM as month and DD as day. Each simulation is stored in one container that includes the NAMELIST file with the model settings, the sound_in file with the vertical profiles used for model initialization, the kmls.lay profile or radiation background profiles, and several NetCDF files including post-processed model outputs for 4D variables and 5D variables (binned distributions). Variables names and units are described in the metadata. The data set has been stored in the following containers: (Please access to the containers using the external URL links provided in the version 2 of this record) -20200924_baseL41ms, base scenario, UCLALES-SALSA in level 4 for liquid cloud, initialization with aerosol particles in a single mixing state (Size: 100 GB) - 20200924_altL42ms, alternative scenario, UCLALES-SALSA in level 4 for liquid cloud, initialization with aerosol particles in two mixing states (Size: 204.8 GB) - 20201031_baseL4, base scenario, UCLALES-SALSA in level 4 for liquid cloud, initialization with 100 % of observed aerosol loading (Size: 122.6 GB) - 20201031_altL4red, alternative scenario, UCLALES-SALSA in level 4 for liquid cloud, initialization with 60% of observed aerosol loading (40 % reduction) (Size: 122.6 GB) - 20201031_altL5red, alternative scenario, UCLALES-SALSA in level 5 for mixed-phase cloud, initialization with 60% of observed aerosol loading (40 % reduction) (Size: 204.76 GB)

Additional details

Identifiers

URL
https://etsin.fairdata.fi/dataset/4c2378d9-c780-4283-89bc-92a8a32a2768
b2rec
94bd5272537c42bea8130abb3b368da4

Funding

Academy of Finland
309127, 317373
Horizon 2020 Research and Innovation Programme
821205

FMI metadata

Link to external data location (URL)
https://a3s.fi/20200924_baseL41ms/index.html, https://a3s.fi/20200924_altL42ms/index.html, https://a3s.fi/20201031_baseL4/index.html, https://a3s.fi/20201031_altL4red/index.html, https://a3s.fi/20201031_altL5red/index.html
Process step
Model outputs were sampled every minute along model domain and simulation time
Source data
Files are raw data from simulations
Lineage
Original data without averaging or modifications
Platforms
CSC's supercomputer Puhti, https://docs.csc.fi/computing/overview/
Model
UCLALES-SALSA (DEV version 17.08.2021) available from https://github.com/UCLALES-SALSA/UCLALES-SALSA/tree/DEV)
Parameter
  • Parameter name: Absolute temperature
  • Parameter unit: K
  • Parameter description: temp
  • Parameter name: Pressure
  • Parameter unit: Pa
  • Parameter description: press
  • Parameter name: Moist air density
  • Parameter unit: kg m^(-3)
  • Parameter description: dn
  • Parameter name: Potential temperature
  • Parameter unit: K
  • Parameter description: theta
  • Parameter name: Vertical component of the wind velocity
  • Parameter unit: m s^(-1)
  • Parameter description: wwind
  • Parameter name: Relative humidity over liquid water
  • Parameter unit: Dimensionless
  • Parameter description: rh
  • Parameter name: Relative humidity over ice
  • Parameter unit: Dimensionless
  • Parameter description: rhi
  • Parameter name: Water vapor mixing ratio
  • Parameter unit: kg kg^(-1)
  • Parameter description: rp
  • Parameter name: Cloud water mixing ratio (including water in aerosol)
  • Parameter unit: kg kg^(-1)
  • Parameter description: rc
  • Parameter name: Drizzle/rain water mixing ratio
  • Parameter unit: kg kg^(-1)
  • Parameter description: srp
  • Parameter name: Non-rimed ice mixing ratio
  • Parameter unit: kg kg^(-1)
  • Parameter description: ri
  • Parameter name: Liquid precipitation flux
  • Parameter unit: W m^(-2)
  • Parameter description: rrate
  • Parameter name: Frozen precipitation flux
  • Parameter unit: W m^(-2)
  • Parameter description: irate
  • Parameter name: Net short wave radiant flux
  • Parameter unit: W m^(-2)
  • Parameter description: sflx
  • Parameter name: Net total radiant flux
  • Parameter unit: W m^(-2)
  • Parameter description: rflx
  • Parameter name: Total number of aerosol particles, size distribution A
  • Parameter unit: # kg^(-1)
  • Parameter description: Naa
  • Parameter name: Total number of aerosol particles, size distribution B
  • Parameter unit: # kg^(-1)
  • Parameter description: Nab
  • Parameter name: Total number of cloud droplets, size distribution A
  • Parameter unit: # kg^(-1)
  • Parameter description: Nca
  • Parameter name: Total number of cloud droplets, size distribution B
  • Parameter unit: # kg^(-1)
  • Parameter description: Ncb
  • Parameter name: Total number of drizzle/rain drops
  • Parameter unit: # kg^(-1)
  • Parameter description: Np
  • Parameter name: Total number of ice particles
  • Parameter unit: # kg^(-1)
  • Parameter description: Ni
  • Parameter name: Count mean cloud droplet diameter, size distribution A
  • Parameter unit: m
  • Parameter description: Dwca
  • Parameter name: Count mean cloud droplet diameter, size distribution B
  • Parameter unit: m
  • Parameter description: Dwcb
  • Parameter name: Count mean drizzle/rain drop diameter
  • Parameter unit: m
  • Parameter description: Dwpa
  • Parameter name: Count mean ice particle diameter
  • Parameter unit: m
  • Parameter description: Dwia
  • Parameter name: Number concentration of activated particles
  • Parameter unit: kg kg^(-1)
  • Parameter description: s_n_activ
  • Parameter name: Bulk sulphate species in aerosol size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: aSO4a
  • Parameter name: Bulk sulphate species in cloud size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: cSO4a
  • Parameter name: Bulk sulphate species in drizzle/rain size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: pSO4a
  • Parameter name: Bulk organic carbon species in aerosol size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: aOCa
  • Parameter name: Bulk organic carbon species in cloud droplet size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: cOCa
  • Parameter name: Bulk organic carbon species in drizzle/rain size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: pOCa
  • Parameter name: time
  • Parameter unit: Seconds since the model startup
  • Parameter description: time
  • Parameter name: Grid cell vertical displacement from surface
  • Parameter unit: m
  • Parameter description: zt/zm
  • Parameter name: Grid cell zonal displacement from the domain center
  • Parameter unit: m
  • Parameter description: xt/xm
  • Parameter name: Grid cell zonal displacement from the domain center
  • Parameter unit: m
  • Parameter description: yt/ym
  • Parameter name: Lower limits of size bins used in aerosol size distribution A
  • Parameter unit: m
  • Parameter description: aea
  • Parameter name: Lower limits of size bins used in aerosol size distribution B
  • Parameter unit: m
  • Parameter description: aeb
  • Parameter name: Lower limits of size bins used in cloud droplet size distribution A
  • Parameter unit: m
  • Parameter description: cla
  • Parameter name: Lower limits of size bins used in cloud droplet size distribution B
  • Parameter unit: m
  • Parameter description: clb
  • Parameter name: Lower limits of size bins used in drizzle/rain size distribution
  • Parameter unit: m
  • Parameter description: prc
  • Parameter name: Lower limits of size bins used in ice particle size distribution
  • Parameter unit: m
  • Parameter description: ice
  • Parameter name: Binned number concentrations of aerosol particle in the size distribution A
  • Parameter unit: kg kg^(-1)
  • Parameter description: Naba
  • Parameter name: Binned number concentrations of aerosol particle in the size distribution B
  • Parameter unit: kg kg^(-1)
  • Parameter description: Nabb
  • Parameter name: Binned number concentrations of cloud droplets in the size distribution A
  • Parameter description: Ncba
  • Parameter name: Binned number concentrations of cloud droplets in the size distribution B
  • Parameter unit: kg kg^(-1)
  • Parameter description: Ncbb
  • Parameter name: Binned number concentrations of drizzle/rain droplets
  • Parameter unit: kg kg^(-1)
  • Parameter description: Npba
  • Parameter name: Binned number concentrations of ice particles
  • Parameter unit: kg kg^(-1)
  • Parameter description: Niba
  • Parameter name: Binned wet diameter of aerosol particles in the size distribution A
  • Parameter unit: m
  • Parameter description: Dwaba
  • Parameter name: Binned wet diameter of aerosol particles in the size distribution B
  • Parameter unit: m
  • Parameter description: Dwabb
  • Parameter name: Binned wet diameter of cloud droplets in the size distribution A
  • Parameter unit: m
  • Parameter description: Dwcba
  • Parameter name: Binned wet diameter of cloud droplets in the size distribution B
  • Parameter unit: m
  • Parameter description: Dwcbb
  • Parameter name: Binned wet diameter of drizzle/rain droplets
  • Parameter unit: m
  • Parameter description: Dwpba
  • Parameter name: Binned wet diameter of ice particles
  • Parameter description: Dwiba
Data levels (meter, hectoPascal, degree, sigma pressure levels, other) in vertical direction(+/-) for example 1500 m or 850 hPa
  • Level: From surface up to 1.2 km in 10 m increments
Resolution
30
Supplemental information
Version 2 was created to fix issues with the External URL links provided in Version 1
Topic category
climatologyMeteorologyAtmosphere

Temporal Coverage

Ranges:

Start date:
End date: 2020-09-24
Start date: 2020-10-30
End date: 2020-10-31

Spans:

Span:Minutely

Locations

Kuopio Point:
(Lon: 27.6556, Lat: 62.9092 )