TY - GEN
T1 - Moisture & roughness map in arctic national wildlife Refuge/Alaska
AU - Watanabe, Manabu
AU - Kushida, Keiji
AU - Fukuda, Masami
AU - Sato, Motoyuki
PY - 2011
Y1 - 2011
N2 - We propose an algorithm to estimate moisture level of active layer of permafrost over permafrost area. This algorithm is based on Oh's semi-empirical model, and PALSAR data observed both in winter and summer seasons with vh polarization. PALSAR vh polarization data observed in winter is used to estimate surface roughness of permafrost. Then, the estimated surface roughness and PALSAR vh polarization data observed in summer is used to estimate the moisture level of the active layer of the permafrost. The moisture levels estimated from PALSAR data moderately matched to those of validation data taken in the field with correction factor of 0.6, while the surface roughness value shows some difference. The possible cause of the difference observed in the roughness value is that the surface roughness derived from the field data collection represents the roughness of the top of the sphagnum moss layer covered on the active layer of the permafrost, while the one estimated from PALSAR represents the roughness of the underlying active layer of the permafrost.
AB - We propose an algorithm to estimate moisture level of active layer of permafrost over permafrost area. This algorithm is based on Oh's semi-empirical model, and PALSAR data observed both in winter and summer seasons with vh polarization. PALSAR vh polarization data observed in winter is used to estimate surface roughness of permafrost. Then, the estimated surface roughness and PALSAR vh polarization data observed in summer is used to estimate the moisture level of the active layer of the permafrost. The moisture levels estimated from PALSAR data moderately matched to those of validation data taken in the field with correction factor of 0.6, while the surface roughness value shows some difference. The possible cause of the difference observed in the roughness value is that the surface roughness derived from the field data collection represents the roughness of the top of the sphagnum moss layer covered on the active layer of the permafrost, while the one estimated from PALSAR represents the roughness of the underlying active layer of the permafrost.
KW - PALSAR
KW - algorithm
KW - moisture
UR - http://www.scopus.com/inward/record.url?scp=83755182867&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=83755182867&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:83755182867
SN - 9788993246179
T3 - 2011 3rd International Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2011
SP - 265
EP - 268
BT - 2011 3rd International Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2011
T2 - 2011 3rd International Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2011
Y2 - 26 September 2011 through 30 September 2011
ER -