The Tendency Analysis of Albedo by Land Cover Over Northeast Asia Using MODIS 16-Day Composited Albedo data

Abstract

: Albedo is known as a factor that directly impacts on the surface energy balance one of the elements of earth radiation balance. The change of albedo includes the change of soil moisture, vegetation, solar zenith angle, snow, and so on. In addition, it operates as a crucial path to understanding feedback mechanisms between radiation balance and its influence on climate and vegetation dynamics and therefore, observing the variation of albedo is a one of the essential procedures for anticipating climate change. In this study, we used MODIS 16-Day composited Albedo data from 2001 to 2011 years with the purpose of observing the change of albedo over Northeast Asia. According to the tendency of albedo for 11 years, albedo in the area of an active vegetation has increased in near-infrared (NIR) domain and decreased in visible (VIS) domain. On the basis of local changes in vegetation in 2002, the both area of the Gobi Desert and the Manchuria was enormously changed and chosen the research area and furthermore, the vegetation of both regions had deteriorated due to the change of the minimum value since 2010.

Retrieval Spectral Albedo using red and NIR band of SPOT/VGT

“…1 represents the area of Korean Journal of Remote Sensing, Vol.30, No.3, 2014 -3 68- interest which shows the distribution of land type from MODIS land cover map. Our study area has dynamic interactions of vegetation, land cover and climatic change effects as stated in many previous studies (Pi et al, 2009;Kim et al, 2011;Park et al, 2012).…”

Comparison of Two Semi-Empirical BRDF algorithms using SPOT/VGT

“…The S product was carried out radiometric, geometric correction and atmospheric effects were also corrected by Simplified Method Atmospheric Correction (SMAC) which was developed by Rahman and Dedieu (1994). (Pi et al, 2009;Kim et al, 2011;Park et al, 2012).…”

Retrieval of background surface reflectance with pre-running BRD components

“…Area of this study is the Northeast Asia include Korea, China and Japan, cause this area has many land types like croplands, forest, barren, urban and climatic change effects stated in previous studies (Pi et al, 2009;Kim et al, 2011;Park et al, 2012). And period of this study is from Feb.…”