TY  - JOUR
AU  - Tan, Zhengxi
AU  - Liu, Shuguang
AU  - Wylie, Bruce K.
AU  - Jenkerson, Calli B.
AU  - Oeding, Jennifer
AU  - Rover, Jennifer A.
AU  - Young, Claudia J.
PY  - 2013//
TI  - MODIS-informed greenness responses to daytime land surface temperature fluctuations and wildfire disturbances in the Alaskan Yukon River basin
JO  - International Journal of Remote Sensing
SP  - 2187
EP  - 2199
VL  - 34
IS  - 6
KW  - basin
KW  - disturbance
KW  - fluctuation
KW  - greenness
KW  - journal articles
KW  - river
KW  - river basin
KW  - temperature
KW  - wildfire
KW  - Yukon River basin
N2  - Pronounced climate warming and increased wildfire disturbances are known to modify forest composition and control the evolution of the boreal ecosystem over the Yukon River Basin (YRB) in interior Alaska. In this study, we evaluate the post-fire green-up rate using the normalized difference vegetation index (NDVI) derived from 250 m 7 day eMODIS (an alternative and application-ready type of Moderate Resolution Imaging Spectroradiometer (MODIS) data) acquired between 2000 and 2009. Our analyses indicate measureable effects on NDVI values from vegetation type, burn severity, post-fire time, and climatic variables. The NDVI observations from both fire scars and unburned areas across the Alaskan YRB showed a tendency of an earlier start to the growing season (GS); the annual variations in NDVI were significantly correlated to daytime land surface temperature (LST) fluctuations; and the rate of post-fire green-up depended mainly on burn severity and the time of post-fire succession. The higher average NDVI values for the study period in the fire scars than in the unburned areas between 1950 and 2000 suggest that wildfires enhance post-fire greenness due to an increase in post-fire evergreen and deciduous species components.
SN  - http://dx.doi.org/10.1080/01431161.2012.742215
UR  - http://dx.doi.org/10.1080/01431161.2012.742215
N1  - exported from refbase (http://eros.usgs.gov/refbase/show.php?record=25641), last updated on Mon, 04 Mar 2013 08:35:58 -0600
ID  - Tan_etal2013
ER  -