MODIS Daily Nadir-Adjusted Reflectance for Global Climate Modeling

Daily global coverage at 30 arc-second resolution provides nadir-adjusted reflectance values for MODIS band 1. The dataset is produced by LPCLOUD using 16 days of Terra and Aqua MODIS data, temporally weighted to the ninth day. It is designed for use in climate simulation models.

Use Cases

• Modeling land surface albedo in climate simulations using the Nadir BRDF-Adjusted Reflectance (NBAR) layer.
• Analyzing temporal trends in surface reflectance for MODIS band 1 using the daily, temporally-weighted data.
• Assessing the quality of reflectance retrievals by applying the band-specific quality flags described in the user guide.
• Comparing surface reflectance conditions at local solar noon across the globe using the nadir-view modeled values.

Strengths

• Daily temporal resolution provides frequent observations.
• Global spatial coverage at 30 arc-second (approximately 1km) resolution supports climate-scale analysis.
• Data is corrected for view-angle effects to model nadir-view reflectance.

Limitations

• Each product file contains only one data layer, limiting simultaneous multi-band analysis.
• Known issues exist, requiring users to consult external quality assessment resources.
• The reliance on a 16-day data window for daily production may smooth or lag rapid surface changes.

Provenance

Source

LPCLOUD using Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) data.

Collection Method

Produced daily using 16 days of MODIS data, applying the NBAR algorithm to remove view angle effects.

Time Range

Daily coverage.

Freshness

Daily

Geography

Global.