ESTIMATING THE LAND SURFACE ALBEDO USING LEVEL1-G AND CDR LANDSAT-7 SATELLITE IMAGES

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SABZIPARVAR A.A.; FAKHARIZADEH SHIRAZI E.; MAROFI S.; REZAEI Y.

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Journal: Journal of Agricultural Meteorology Year:2016 | Volume:3 | Issue:2 Page(s): 45-54

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Title

ESTIMATING THE LAND SURFACE ALBEDO USING LEVEL1-G AND CDR LANDSAT-7 SATELLITE IMAGES

Author(s)

SABZIPARVAR A.A. | FAKHARIZADEH SHIRAZI E. | MAROFI S. | REZAEI Y. | Issue Writer Certificate

Keywords

SURFACE ALBEDOQ2

LANDSAT-7Q2

REFLECTANCEQ2

CDRQ1

HAMEDANQ2

Abstract

Land SURFACE ALBEDO, is defined as the ratio of the surface reflected to received solar radiation. It is one of the major meteorological variables required for calculation of the surface radiation budget, crop water requirement and boundary conditions of climate models. During the last several decades, the albedo has been estimated using remotely sensed data. In this study, land SURFACE ALBEDO is estimated by using Level1-G and CDR LANDSAT-7 satellite images and compared with in-situ data in a farmland located in HAMEDAN province in the proximity of the climatology station located at faculty of agriculture, Bu-Ali Sina University. For this purpose, 14 satellite images were used. In-situ SURFACE ALBEDO data were also obtained from the net radiometer installed at the study site. SURFACE ALBEDO was calculated at various wavelengths after removing SLC-Off, cloud effect, and atmospheric and topographic errors. The results showed that the estimated green cover albedo values were within the range of 0.21-0.26 and snow cover albedo was approximately 0.65. Estimates of SURFACE ALBEDO from CDR and Level1-G images were evaluated against the surface measurements by using root mean square errors (RMSE). The calculated RMSE was within the range of 0.02 to 0.09. Furthermore, the maximum error of estimated albedo was observed in NIR wavelengths. According to the Fisher test results, there was no significant difference between the estimated SURFACE ALBEDO from CDR and Level1-G images. Hence, for crude estimation of SURFACE ALBEDO, both approaches can be recommended with no priority; especially, for coarse regional estimates.

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APA: Copy

SABZIPARVAR, A.A., FAKHARIZADEH SHIRAZI, E., MAROFI, S., & REZAEI, Y.. (2016). ESTIMATING THE LAND SURFACE ALBEDO USING LEVEL1-G AND CDR LANDSAT-7 SATELLITE IMAGES. JOURNAL OF AGRICULTURAL METEOROLOGY, 3(2), 45-54. SID. https://sid.ir/paper/249966/en

Vancouver: Copy

SABZIPARVAR A.A., FAKHARIZADEH SHIRAZI E., MAROFI S., REZAEI Y.. ESTIMATING THE LAND SURFACE ALBEDO USING LEVEL1-G AND CDR LANDSAT-7 SATELLITE IMAGES. JOURNAL OF AGRICULTURAL METEOROLOGY[Internet]. 2016;3(2):45-54. Available from: https://sid.ir/paper/249966/en

IEEE: Copy

A.A. SABZIPARVAR, E. FAKHARIZADEH SHIRAZI, S. MAROFI, and Y. REZAEI, “ESTIMATING THE LAND SURFACE ALBEDO USING LEVEL1-G AND CDR LANDSAT-7 SATELLITE IMAGES,” JOURNAL OF AGRICULTURAL METEOROLOGY, vol. 3, no. 2, pp. 45–54, 2016, [Online]. Available: https://sid.ir/paper/249966/en

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