High angular and spectral directional reflectance dataset of snow and sea-ice

Date 2015
Temporal extent 2015-05-22 -2015-06-07
Author(s) Goyens ClémenceORCID1, Marty SabineORCID2, Leymarie EdouardORCID2, Antoine DavidORCID2, 3, Babin MarcelORCID4, Bélanger Simon1
Affiliation(s) 1 : Université du Québec à Rimouski, Département de biologie, chimie et géographie, BOREAS et Québec‐OcéanRimouski, Québec, Canada
2 : Sorbonne Universités, UPMC Univ Paris 06, INSU‐CNRS, Laboratoire d'Océanographie de VillefrancheVillefranche‐sur‐Mer, France
3 : Remote Sensing and Satellite Research Group, Department of Physics and Astronomy, Curtin UniversityPerth, Western Australia, Australia
4 : Takuvik Joint International Laboratory, Québec‐Océan, CNRS (France) and ULaval (Canada), Pavillon Alexandre Vachon, Département de Biologie, Université LavalQuébec, Québec, Canada
DOI 10.17882/55352
Publisher SEANOE
Keyword(s) HDRF, BRDF, snow, ice, meltpond, Arctic, reflectance, multispectral, hyperspectral, hyperangular, ASD, CE600, directional reflectance, GreenEdge, satellite, validation, albedo, surface reflectance, fish-eye camera
Abstract

This dataset includes the data published in Goyens et al. (2018, DOI:10.1002/2017EA000332). It provides the following parameters for the different ice, snow and ponded ice stations of the GreenEdge Ice Camp 2015:


  • the hyperspectral (400-1000 nm) Hemispherical Directional Reflectance Factor (HDRF, units: dimensionless) measured with Analytical Spectral Device, Inc. (ASD) over a full hemisphere with 30° angular resolution along zenith and azimuth,

  • the hyperangular (full hemisphere at 1° angular resolution) multispectral (438, 560 and 628 nm) upwelling irradiance (Lu, units: µW.cm^-2.sr^-1.nm^-1) measured with a circular fish‐eye radiance camera (CE600) (median Lu and coefficient of variation are provided, see Goyens et al. (2018, DOI:10.1002/2017EA000332 for more info about data processing)

  • the multispectral (at 406.42, 434.48, 442.33, 489.70, 508.43, 560.22 and 624.20 nm) downwelling irradiance (Ed, units: µW.cm^-2.nm^-1) measured with the OCR from Satlantic,

  • the hyperangular HDRF (units: dimensionless) estimated as PI times the ratio of Lu CE600 to Ed OCR  at 438, 560 and 628 nm (median and coefficient of variation are provided, see Goyens et al. (2018, DOI:10.1002/2017EA000332 for data processing), and,

  • the columnar aerosol optical depth (AOD, units: dimensionless) at 440, 500, 675, 870 and 936 nm estimated from a Handheld 5-channel Sunphotometer Microtops II.
Licence CC-BY-NC
Utilisation Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of data. Data are intended to be research-quality and include estimates of data quality and accuracy, but it is possible that these estimates or the data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. Authors welcome users to ask questions and report problems.
Acknowledgements Special thanks goes to Pierre Larouche for having graciously provided the ASD instrument and Don Perovich his metal arch for the ASD setup. This work was partially funded by the European Space Agency through the ESA Living Planet Fellowship Program and carried out in the frame of the GreenEdge project (http://www.greenedgeproject. info). The GreenEdge project is funded by the following French and Canadian programs and agencies: ANR (contract 111112), CNES (project 131425), IPEV (project 1164), CSA, Fondation Total, ArcticNet, LEFE, and the French Arctic Initiative (GreenEdge project). This project would not have been possible without the support of the Hamlet of Qikiqtarjuaq and the members of the community as well as the Inuksuit School and its Principal Jacqueline Arsenault. The project is conducted under the scientific coordination of the Canada Excellence Research Chair on Remote sensing of Canada’s new Arctic frontier and the CNRS and Université Laval Takuvik Joint International Laboratory (UMI3376). The field campaign was successful thanks to the contribution of J. Ferland, G. Bécu, C. Marec, J. Lagunas, F. Bruyant, J. Lariviére, E. Rehm, S. Lambert-Girard, C. Aubry, C. Lalande, A. LeBaron, C. Marty, J. Sansoulet, D. Christiansen-Stowe, A. Wells, M. Benoît-Gagné, E. Devred, and M.-H. Forget from the Takuvik laboratory, C.J. Mundy and V. Galindo from University of Manitoba, and F. Pinczon du Sel and E. Brossier from Vagabond. We also thank Michel Gosselin, Québec-Océan, the CCGS Amundsen, and the Polar Continental Shelf Program for their in-kind contribution in polar logistic and scientific equipment.
Sensor metadata

(1) ASD HDRF

  • Instrument Type: hyperspectral field spectrometer ASD
  • Manufacturer: ASD Inc.
  • Model: ASD FieldSpec Dual instrument #9106 - radiance (10° field of view) and cosine irradiance sensors
  • Instrument Features / Calibration: hyperspectral (350-1000 nm) radiance (10° field of view) and cosine irradiance sensors (raw data only – not calibrated)

(2) Lu and HDRF CE600

  • Instrument Type: Fish-eye multispectral radiance camera CE600 (more details in Antoine et al., 2013, http://archimer.ifremer.fr/doc/00185/29659/)
  • Manufacturer: CIMEL Electronics in collaboration with Laboratoire d’Océanographie de Villefranche sur Mer (LOV)
  • Model: CE600 SN
  • Instrument Features / Calibration: Calibrated (at LOV) radiance measurement at 438, 560 and 628 nm over a full hemisphere (184° field of view)

(3) Ed OCR

  • Instrument Type: SATLANTIC OCR IRRADIANCE SENSOR
  • Manufacturer: SATLANTIC
  • Model: Satlantic OCR SN 286
  • Instrument Features / Calibration: Calibrated (at LOV) cosine irradiance sensor at 406.42, 434.48, 442.33, 489.70, 508.43, 560.22 and 624.20 nm
  • sensor precision: 1-2%

(4) AOD

  • Instrument Type: Handheld 5-channel Sunphotometer Microtops II
  • Manufacturer: Solar Light Company, Inc.
  • Model: Microtops II SN 03766
  • Instrument Features / Calibration: Calibrated spectral measurements at 440, 500, 675, 870 and 936 nm of the direct solar radiation for the estimation of columnar aerosol optical depth (AOD)
  • sensor precision: 1-2%
Data
File Size Format Processing Access
Downwelling irradiance Ed from OCR satlantic 6 MB CSV Quality controlled data Open access
Aerosol Optical Thickness AOT from MICROTOPS 5 KB CSV Quality controlled data Open access
CE600 HDRF (median and coefficient of variation) for meltpond, ice and snow surfaces - name convention: CE600_[solar zenith angle][surface]hdrf.dat 2 MB CSV Processed data Open access
CE600 Lu (median and coefficient of variation) for meltpond, ice and snow surfaces - name convention: CE600_[solar zenith angle][surface]Lu.dat 2 MB CSV Processed data Open access
ASD HDRF for meltpond, ice and snow surfaces - name convention: ASD[solar zenith angle][surface]_hdrf.dat 250 KB CSV Processed data Open access
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How to cite 

Goyens Clémence, Marty Sabine, Leymarie Edouard, Antoine David, Babin Marcel, Bélanger Simon (2015). High angular and spectral directional reflectance dataset of snow and sea-ice. SEANOE. https://doi.org/10.17882/55352


In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :


Goyens C., Marty S., Leymarie E., Antoine D., Babin M., Bélanger S. (2018). High Angular Resolution Measurements of the Anisotropy of Reflectance of Sea Ice and Snow. Earth and Space Science, 5(1), 30-47. https://doi.org/10.1002/2017EA000332