Earth's spectral and textural trends as observed from Terra
Abstract
As the flagship of NASA's Earth Observing System, Terra has been successfully operated for over 18 years and provides one of the most valuable satellite records for examining Earth's climate change. Many geophysical variables have been studied for their mission-scale trends at regional to global scales, however, trends in the underlying spectral radiance data have not been fully explored for understanding our changing climate.
In a previous study, Zhao et al. (2016) illustrated that the Earth has been appearing bluer and smoother over the past 15 years using Multi-angle Imaging SpectroRadiometer (MISR) onboard Terra. Taking advantage of the fresh Terra Fusion (TF) product that combines up-to-date radiances data from all five Terra instruments over the Terra record, we extend the spectral and textural trend analysis to other instruments. Collocated radiance samples are collected using the Advanced Fusion Toolkit (AFT) and then used to identify spectral trends over the globe. By considering the uncertainties in the radiometric calibration and variability in spectral solar irradiance, the detected regional spectral and spatial trends are linked to the potential causes, such as changes in surface, cloud and aerosol properties.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.A24A..04Z
- Keywords:
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- 0305 Aerosols and particles;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0321 Cloud/radiation interaction;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0394 Instruments and techniques;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 3305 Climate change and variability;
- ATMOSPHERIC PROCESSES