Factors Affecting L-Band Alos Palsar Backscatter on Tropical Forest Biomass

Factors Affecting L-Band Alos Palsar Backscatter on Tropical Forest Biomass

Hamdan O

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Hamdan O. Mohd Hasmadi I. Khali Aziz H. Norizah K.

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Helmi Zulhaidi M.S.

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Universiti Putra Malaysia

Factors Affecting L-Band Alos Palsar Backscatter on Tropical Forest Biomass

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Abstract

Above ground biomass (AGB) is one of the key parameters for carbon accounting in a forest area. However, estimating this parameter by using remote sensing approach has been challenging as the interpretation of remotely sensed data are constrained by various factors, especially in a complex tropical forest ecosystem. Synthetic aperture radar (SAR) sensor system has its potential in obtaining acceptable AGB estimation but several issues such as complex forest structure and saturation at certain biomass levels remain unanswered and continuously being studied. This study was carried out to identify factors that contribute to the variation of backscattering properties on forest biomass. The sensitivity of L-band backscatter from Alos Palsar satellite with a wavelength of about 23 cm to the forest biomass was examined. Natural and logged forests of Dungun Timber Complex in Terengganu, Peninsular Malaysia were selected as the study area. AGB at a number of sample plots were measured on the ground in the study area. Both aspects of forestry and remote sensing comprised several variables namely tree allometry, vertical forest strata, tree diameter classes, radar polarimetry, and spatial variability were examined in four experiments. AGB was calculated based on these parameters and tested by using statistical backward elimination method to identify the most significant factor that infer the backscatter. The study revealed that the L-band Alos Palsar backscatter interacts only with canopies of forest at certain size of trees.

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

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How to Cite This Article

Hamdan O. 2014. \u201cFactors Affecting L-Band Alos Palsar Backscatter on Tropical Forest Biomass\u201d. Global Journal of Science Frontier Research - D: Agriculture & Veterinary GJSFR-D Volume 14 (GJSFR Volume 14 Issue D3).

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GJSFR Volume 14 Issue D3

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Journal Specifications

Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

Keywords

Aboveground biomass alos palsar Saturation tropical factors

Submission ReceivedApril 20, 2014
Peer Review Double Blind
Handling Editor
Accepted May 10, 2014
Published May 20, 2014

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v1.2

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June 11, 2014

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Article Matrices

Total Score: 102

Country: Malaysia

Subject: Global Journal of Science Frontier Research - D: Agriculture & Veterinary

Authors: Hamdan O. Mohd Hasmadi I. Khali Aziz H. Norizah K., Helmi Zulhaidi M.S. (PhD/Dr. count: 0)

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