Cloud-Radiation Feedback: Boundary Layer Cloud Microphysical Properties and Processes  View Catalog Page Entry ID
ARCSS140
Summary
This data set includes Surface Heat Budget of the Arctic (SHEBA) cloud microphysical data collected onboard the National Center for Atmospheric Research (NCAR) C-130 aircraft. This work focused on improving the quality of algorithms used to process in situ measurements collected during First International Satellite Cloud Climatology Project (ISCCP) Regional Experiment, Arctic Cloud Experiment (SHEBA/FIRE, ACE) and applying the results to the analysis of five case studies. Such research was deemed valuable as a result of weaknesses and inconsistencies in the existing C-130 data set that were pointed out in a SHEBA workshop held in 2000. Data has been reprocessed by SPEC, Inc. to improve quality and add value to the measurements. Investigators selected five research days that were considered to be high priority by the SHEBA science team: 4 May, 8 July, 18 July, 28 July, and 29 July of 1998.
New software algorithms and procedures were developed to objectively combine the measurements from the NCAR C-130 forward-scattering spectrometer probe (FSSP), Commonwealth Scientific and Industrial Research Organization (CSIRO)-King probe, 260X probe, 2D-C probe, and 2D-P probe which were made by Particle Measuring Systems, Inc. (PMS) along with a Cloud Particle Imager (CPI) made by SPEC, Inc. Prior to this work, 2D-probe data had not been analyzed quantitatively; the 260X probe data were used instead. It was found that using the 260X data resulted in severe underestimation of ice water content (IWC), radar reflectivity and effective particle size in most mixed-phase regions of cloud.
The software developed for this research performed several functions. CPI data were separated into water drops and ice crystals in mixed-phase clouds. Ice crystals were classified according to crystal type. An improved algorithm was developed to calculate IWC based on digitization and re-analysis of ice crystal and melted-drop images. The new algorithms were applied to the calculation of IWC, extinction coefficient, radar reflectivity, and ice particle effective size.
Geographic Coverage
Spatial Coordinates:
N: 78.6105°
S: 75.4442°
E: -160.6095°
W: -167.2124°
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Data Set Citation
Dataset Creator: Paul Lawson
Dataset Title: Cloud-Radiation Feedback: Boundary Layer Cloud Microphysical Properties and Processes
Dataset Release Date: 2006-02-10
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/arcss140.html
Temporal Coverage
Start Date: 1998-05-04
Stop Date: 1998-07-29
Location Keywords
- GEOGRAPHIC REGION ARCTIC
- OCEAN ARCTIC OCEAN
- OCEAN ARCTIC OCEAN BEAUFORT SEA
Science Keywords
- Atmosphere Aerosols Aerosol Particle Properties
- Atmosphere Air Quality Particulates
- Atmosphere Clouds Cloud Liquid Water/Ice
Ancillary Keywords
- arcss140
- ARCSS Data Coordination Center
- Arctic
- Beaufort Sea
- Cloud Liquid Water
- Ice Scattering
- NSIDC > National Snow and Ice Data Center
- OPP-0084314
- SHEBA
- Climatology/Meteorology/Atmosphere
Platform
Instrument
- 2DC 2D Cloud Probe
- CPI Cloud Particle Imager
- FSSP Forword Scattering Spectrometer Probe
- PMS 2D-C PROBE Particle Measuring Systems 2D-C Probe
- PMS 2D-P PROBE Particle Measuring Systems 2D-P Probe
Project
- ARCSS/OAII/SHEBA Arctic System Science/OAII/Surface Heat Budget of the Arctic Ocean
- FIRE/ACE First ISCCP Regional Experiment Arctic Cloud Experiment
- SHEBA Surface Heat Budget of the Arctic Ocean
Quality
Please see the detailed documentation provided by the investigators, 'Final_Report.pdf' and 'SPEC Microphysical Data Archive Format.pdf.'
Data Center
National Snow and Ice Data Center
Data Center URL: http://nsidc.org
Data Center Personnel
Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Distribution
Distribution Media: CD-ROM
Distribution Size: 600 MB
Distribution Format: ASCII Text
Distribution Media: CD-ROM
Distribution Size: 600 MB
Distribution Format: Microsoft Word
Distribution Media: CD-ROM
Distribution Size: 600 MB
Distribution Format: PDF
Distribution Media: CD-ROM
Distribution Size: 600 MB
Distribution Format: PNG
Personnel
Paul Lawson
Role: INVESTIGATOR
Contact Address:
- SPEC Incorporated
- 3022 Sterling Circle Suite 200
City: Boulder
Province or State: CO
Postal Code: 80301
Country: USA
NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- CIRES, 449 UCB
- University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Related URL
VIEW PROJECT HOME PAGE
SHEBA Website
Reference
Lawson, R. P., B. A. Baker, C. G. Schmitt and T. L. Jensen. 2001. An overview of microphysical properties of Arctic clouds observed in May and July during FIRE.ACE. Journal of Geophysical Research 106, 14, 989-15,014.
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 2006-02-10
Last DIF Revision Date: 2012-06-04
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