Abstract:

Albedo is an important parameter reflecting the energy balance of winter wheat field. For monitoring the albedo changing during winter wheat growing period, the albedo measured by the albedometer in ground fields can’t represent the spatial distribution well. So the remote sensing data should be helpful if we can use them effectively. MODIS(moderate resolution imaging spectro-radiometer)data products have been used widely in many remote sensing application fields now. Validations are necessary before using the MODIS albedo products in the large-area crop research. Due to the different scales between MODIS albedo product and the albedo measured in ground field, some unusual data processing method should be adopted.

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Key words: Albedo, Spatial scale, Winter wheat, Growing period, MODIS albedo product