Assessing global surface water inundation dynamics using combined satellite information from SMAP, AMSR2 and Landsat

Assessing global surface water inundation dynamics using combined satellite information from SMAP, AMSR2 and Landsat

A method to assess global land surface water (fw) inundation dynamics was developed by exploiting the enhanced fw sensitivity of L-band (1.4 GHz) passive microwave observations from the Soil Moisture Active Passive (SMAP) mission. The L-band fw (fwLBand) retrievals were derived using SMAP H-polariza...

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Veröffentlicht in:Remote sensing of environment 2018-08, Vol.213, p.1-17
Hauptverfasser: Du, Jinyang, Kimball, John S., Galantowicz, John, Kim, Seung-Bum, Chan, Steven K., Reichle, Rolf, Jones, Lucas A., Watts, Jennifer D.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
AMSR2
Brightness temperature
data collection
Dry periods
Earth Resources And Remote Sensing
Empirical analysis
Environmental monitoring
Environmental risk
Errors
Flood control
Flood risk
Flooding
Land cover
Land use
Landsat
Landsat satellites
monitoring
Remote sensing
risk
River basins
River discharge
River flow
Rivers
Satellite imagery
Sensitivity enhancement
SMAP
Soil moisture
soil water
Spatial resolution
Surface water
Surface water inundation
temperature
Uncertainty analysis
Vegetation
Vegetation cover
watersheds
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Zusammenfassung:A method to assess global land surface water (fw) inundation dynamics was developed by exploiting the enhanced fw sensitivity of L-band (1.4 GHz) passive microwave observations from the Soil Moisture Active Passive (SMAP) mission. The L-band fw (fwLBand) retrievals were derived using SMAP H-polarization brightness temperature (Tb) observations and predefined L-band reference microwave emissivities for water and land endmembers. Potential soil moisture and vegetation contributions to the microwave signal were represented from overlapping higher frequency Tb observations from AMSR2. The resulting fwLBand global record has high temporal sampling (1–3 days) and 36-km spatial resolution. The fwLBand annual averages corresponded favorably (R = 0.85, p-value 
ISSN:0034-4257
1879-0704
DOI:10.1016/j.rse.2018.04.054