Daily Global Nadir-Adjusted Albedo and Reflectance at 1km Resolution

Daily global data from 2000 to present, produced by NASA's LPCLOUD using 16-day composites from Terra and Aqua MODIS instruments. This dataset provides Nadir BRDF-Adjusted Reflectance (NBAR) for MODIS band 6 at a 30 arc-second (approximately 1 km) resolution, specifically formatted for Climate Modeling Grids (CMG). The data are temporally weighted to the ninth day of each 16-day acquisition period.

Use Cases

• Modeling surface albedo in climate simulations using the daily NBAR values for MODIS band 6.
• Analyzing temporal trends in land surface reflectance by utilizing the daily temporal resolution and 16-day composite weighting.
• Assessing data quality for scientific applications by applying the band-specific quality flags provided with the dataset.
• Studying global land surface processes at a 1km scale using the Climate Modeling Grid (CMG) format.

Strengths

• Daily temporal resolution enables analysis of short-term surface changes.
• Global spatial coverage at 30 arc-second (~1km) resolution suitable for climate-scale models.
• Data incorporates a 16-day composite to reduce noise, weighted to a central observation day.
• Product is part of a validated MODIS Version 6.1 data suite with documented quality flags.

Limitations

• Each product file contains only one data layer, requiring multiple files for multi-band analysis.
• The 1km spatial resolution may be insufficient for studies requiring fine-scale local analysis.
• Known issues exist, requiring users to consult external resources for complete error assessment.

Provenance

Source

NASA LPCLOUD, derived from Terra and Aqua MODIS instruments.

Collection Method

Produced daily using a 16-day composite of MODIS data, applying the NBAR algorithm to remove view angle effects.

Time Range

2000 to present (MODIS mission lifetime).

Freshness

Daily

Geography

Global