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Dataset

 

ICECAPS-ACE: MIXCRA retrievals of fog properties at Summit Station, Greenland

Update Frequency: Not Planned
Latest Data Update: 2023-05-03
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2023-05-04
DOI Publication Date: 2023-05-05
Download Stats: last 12 months
Dataset Size: 61 Files | 4MB
Abstract

This dataset contains retrievals of bulk fog particle phase and effective radius generated using the mixed-phase cloud property retrieval algorithm (MIXCRA), during twelve case studies of supercooled radiation fog at Summit Station in central Greenland.

MIXCRA uses optimal estimation to retrieve fog microphysical properties at 5-min intervals from downwelling spectral longwave radiation measured by an Atmospheric emitted radiance interferometer (AERI).
These data and retrievals were generated as part of the ICECAPS-ACE project (The Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit:
erosol Cloud Experiment).
See linked references for more information about the implementation of MIXCRA, the AERI measurements and complementary datasets.

Citable as:  Guy, H.; Turner, D.D.; Walden, V.P.; Rowe, P.M.; Cox, C.J.; Brooks, I.M.; Shupe, M.; Neely III, R.R. (2023): ICECAPS-ACE: MIXCRA retrievals of fog properties at Summit Station, Greenland. Centre for Environmental Data Analysis, 05 May 2023. doi:10.5285/0ad1068f45724169afbe541b2525e81c. https://dx.doi.org/10.5285/0ad1068f45724169afbe541b2525e81c
Abbreviation: Not defined
Keywords: ICECAPS-ACE, fog, Summit station, Greenland Ice Sheet

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

AERI data were collected by the ICECAPS team and published here: https://www.doi.org/10.18739/A2TB0XW2V
Vertical temperature and water vapor profiles were genetrated using the TROPoe algorithm and archived at https://doi.org/10.5439/1880028
These two datasets were used as input to the MIXCRA algorithm (v 1.12 2022/03/16).
The resulting retrievals were passed to CEDA for data archiving.
Data Quality:
Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA)
File Format:
NetCDF

Related Documents

 More about radiation fog events at Summit
 TROPoe (temperature and humidity profile retrievals) used as algorithm input
 Historical and complementary ICECAPS Data
 AERI data used as algorithm input
 MIXCRA algorithm reference 1
 Information about Summit Station
 MIXCRA algorithm reference 2
 Original ICECAPS publication
 MIXCRA algorithm reference 3
 MIXCRA algorithm reference 4
 Pre-print of publication describing these data

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Computation Element: 1

Title MIXCRA: the mixed-phase cloud property retrieval algorithm
Abstract mixcra2.pro,v 1.12 2022/03/16 00:32:15 dave.turner
Input Description None
Output Description None
Software Reference None
Output Description

None
  • var_id: alt
  • long_name: Altitude
  • units: m MSL
  • var_id: cbh
  • long_name: Cloud base height
  • units: km AGL
  • units: degC
  • var_id: tcld
  • long_name: Cloud temperature
  • units: unitless
  • var_id: conv
  • long_name: Convergence flag
  • var_id: corr_itau_ireff
  • long_name: Correlated uncertainty between iTau and ireff
  • units: unitless (between -1 and +1)
  • units: unitless (between -1 and +1)
  • var_id: corr_ltau_itau
  • long_name: Correlated uncertainty between lTau and iTau
  • units: unitless (between -1 and +1)
  • var_id: corr_ltau_ireff
  • long_name: Correlated uncertainty between lTau and ireff
  • units: unitless (between -1 and +1)
  • var_id: corr_ltau_lreff
  • long_name: Correlated uncertainty between lTau and lreff
  • units: unitless (between -1 and +1)
  • var_id: corr_lreff_itau
  • long_name: Correlated uncertainty between lreff and iTau
  • units: unitless (between -1 and +1)
  • var_id: corr_lreff_ireff
  • long_name: Correlated uncertainty between lreff and ireff
  • units: unitless
  • var_id: dfs_ireff
  • long_name: DFS in ice effective radius
  • units: unitless
  • var_id: dfs_itau
  • long_name: DFS in ice optical depth
  • units: unitless
  • var_id: dfs_ltau
  • long_name: DFS in liquid optical depth
  • units: unitless
  • var_id: dfs_lreff
  • long_name: DFS in liquid water effective radius
  • units: s
  • var_id: base_time
  • long_name: Epoch time since 1 Jan 1970 at 00:00:00 UTC
  • var_id: forward_calc
  • long_name: Forward calculation
  • units: RU
  • units: unitless
  • var_id: tau_frac
  • long_name: Fraction of total optical depth
  • units: microns
  • var_id: ireff
  • long_name: Ice effective radius
  • units: unitless
  • var_id: itau
  • long_name: Ice optical depth
  • var_id: lat
  • long_name: Latitude
  • units: deg N
  • units: unitless
  • var_id: ltau
  • long_name: Liquid optical depth
  • units: microns
  • var_id: lreff
  • long_name: Liquid water effective radius
  • long_name: Liquid water path
  • var_id: lwp
  • units: g/m2
  • var_id: lon
  • long_name: Longitude
  • units: deg E
  • units: unitless
  • var_id: iter
  • long_name: Number of iterations performed
  • units: RU
  • var_id: obs_vector
  • long_name: Observed radiance
  • units: RU
  • var_id: rms
  • long_name: RMS difference (obs minus calc)
  • units: degrees
  • var_id: sza
  • long_name: Solar zenith angle
  • units: s
  • var_id: time_offset
  • long_name: Time since base_time
  • units: hours
  • var_id: hour
  • long_name: Time since midnight UTC
  • units: hour
  • var_id: delt_lbl
  • long_name: Time to closest LBLRTM calculation
  • units: hours
  • var_id: lblrtm_hour
  • long_name: Time when LBLRTM calculation was made
  • units: unitless
  • var_id: sigma_tau_frac
  • long_name: Uncertainty in fraction of total optical depth
  • units: microns
  • var_id: sigma_ireff
  • long_name: Uncertainty in ice effective radius
  • units: unitless
  • var_id: sigma_itau
  • long_name: Uncertainty in ice optical depth
  • units: unitless
  • var_id: sigma_ltau
  • long_name: Uncertainty in liquid optical depth
  • units: microns
  • var_id: sigma_lreff
  • long_name: Uncertainty in liquid water effective radius
  • units: g/m2
  • var_id: sigma_lwp
  • long_name: Uncertainty in liquid water path
  • units: RU
  • var_id: obs_vector_uncertainty
  • long_name: Uncertainty in the observed radiance
  • units: cm-1
  • var_id: wnum
  • long_name: Wavenumber

Co-ordinate Variables

Coverage
Temporal Range
Start time:
2013-06-16T00:00:00
End time:
2019-09-30T23:59:59
Geographic Extent

 
72.5750°
  
-38.4600°
  
-38.4600°
 
72.5750°
  
Related parties
Authors (8)
Publishers (1)
Funders (1)
Principal Investigators (1)
Co-Investigators (2)