Soil moisture limitations on monitoring boreal forest regrowth using spaceborne L-band SAR data |
| |
Authors: | Eric S Kasischke Mihai A Tanase Matthew Borr |
| |
Affiliation: | a Department of Geography, 2181 LeFrak Hall, University of Maryland, College Park, MD 20742, USAb University of Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spainc Michigan Tech Research Institute, Michigan Technological University, 3600 Green Court, Suite 100, Ann Arbor, MI 48105, USA |
| |
Abstract: | A study was carried out to investigate the utility of L-band SAR data for estimating aboveground biomass in sites with low levels of vegetation regrowth. Data to estimate biomass were collected from 59 sites located in fire-disturbed black spruce forests in interior Alaska. PALSAR L-band data (HH and HV polarizations) collected on two dates in the summer/fall of 2007 and one date in the summer of 2009 were used. Significant linear correlations were found between the log of aboveground biomass (range of 0.02 to 22.2 t ha-1) and σ° (L-HH) and σ° (L-HV) for the data collected on each of the three dates, with the highest correlation found using the L-HV data collected when soil moisture was highest. Soil moisture, however, did change the correlations between L-band σ° and aboveground biomass, and the analyses suggest that the influence of soil moisture is biomass dependent. The results indicate that to use L-band SAR data for mapping aboveground biomass and monitoring forest regrowth will require development of approaches to account for the influence that variations in soil moisture have on L-band microwave backscatter, which can be particularly strong when low levels of aboveground biomass occur. |
| |
Keywords: | Synthetic aperture radar L-band Biomass Soil moisture |
本文献已被 ScienceDirect 等数据库收录! |
|