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Atmosphere 2017, 8(7), 123; doi:10.3390/atmos8070123

Areal-Averaged Spectral Surface Albedo in an Atlantic Coastal Area: Estimation from Ground-Based Transmission

1
Atmospheric Sciences & Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
2
Department of Physics, University of Nevada, Reno, NV 89557, USA
3
Science Systems and Applications, Inc., Hampton, VA 23666, USA
*
Author to whom correspondence should be addressed.
Received: 10 April 2017 / Revised: 27 June 2017 / Accepted: 29 June 2017 / Published: 12 July 2017
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Abstract

Tower-based data combined with high-resolution satellite products have been used to produce surface albedo at various spatial scales over land. Because tower-based albedo data are available at only a few sites, surface albedos using these combined data are spatially limited. Moreover, tower-based albedo data are not representative of highly heterogeneous regions. To produce areal-averaged and spectrally-resolved surface albedo for regions with various degrees of surface heterogeneity, we have developed a transmission-based retrieval and demonstrated its feasibility for relatively homogeneous land surfaces. Here, we demonstrate its feasibility for a highly heterogeneous coastal region. We use the atmospheric transmission measured during a 19-month period (June 2009–December 2010) by a ground-based Multi-Filter Rotating Shadowband Radiometer (MFRSR) at five wavelengths (0.415, 0.5, 0.615, 0.673 and 0.87 µm) at the Department of Energy’s Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF) site located on Graciosa Island. We compare the MFRSR-retrieved areal-averaged surface albedo with albedo derived from Moderate Resolution Imaging Spectroradiometer (MODIS) observations, and also a composite-based albedo. We demonstrate that these three methods produce similar spectral signatures of surface albedo; however, the MFRSR-retrieved albedo, is higher on average (≤0.04) than the MODIS-based areal-averaged surface albedo and the largest difference occurs in winter. View Full-Text
Keywords: Multi-Filter Rotating Shadowband Radiometer (MFRSR); Moderate Resolution Imaging Spectroradiometer (MODIS) observations; atmospheric transmission; areal-averaged surface albedo; spectral and seasonal variability; Atmospheric Radiation Measurement (ARM) Program Mobile Facility (AMF); coastal region; Graciosa Island; Azores Multi-Filter Rotating Shadowband Radiometer (MFRSR); Moderate Resolution Imaging Spectroradiometer (MODIS) observations; atmospheric transmission; areal-averaged surface albedo; spectral and seasonal variability; Atmospheric Radiation Measurement (ARM) Program Mobile Facility (AMF); coastal region; Graciosa Island; Azores
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kassianov, E.; Barnard, J.; Flynn, C.; Riihimaki, L.; Berg, L.K.; Rutan, D.A. Areal-Averaged Spectral Surface Albedo in an Atlantic Coastal Area: Estimation from Ground-Based Transmission. Atmosphere 2017, 8, 123.

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