Paper Info
Title
Identification of soil moisture retrieval errors: Learning from the comparison of SMOS and ASCAT
Abstract
Due to the strong contrast of the dielectric properties of dry and wet soil at microwave frequencies soil moisture can be retrieved on a global scale from active and passive microwave remote sensing instruments. Recent validation studies carried out over a number of in situ networks in Europe, the US and Australia have demonstrated that the soil moisture retrieval skill achieved with the Soil Moisture and Ocean Salinity (SMOS) mission and the Advanced Scatterometer (ASCAT) compares well in many regions of the world. But of course, there are also areas where the retrieved soil moisture values from these instruments do not match well. In this study global SMOS and ASCAT soil moisture data are compared with the aim to identify the areas of agreement and disagreement. The analysis confirms the findings of the previous studies that over most regions worldwide the temporal evolution of SMOS and ASCAT retrievals compare quite well. Notable exceptions are arid environments where the ASCAT retrievals fail to reproduce the real soil moisture trends, while the SMOS retrievals perform as expected. More work is required to understand the contrasting behavior of the ASCAT and SMOS soil moisture retrievals in these environments.
Year
DOI
Venue
2012
10.1109/IGARSS.2012.6350586
IGARSS
Keywords
Field
DocType
active microwave remote sensing,passive microwave remote sensing,remote sensing,radiometers,smos mission,advanced scatterometer,us,wet soil,soil moisture retrieval error,dry soil,europe,ascat mission,australia,moisture measurement,soil moisture and ocean salinity mission,soil,geophysical signal processing,radar,soil moisture,correlation
Radar,Moisture measurement,Arid,Computer science,Microwave remote sensing,Remote sensing,Scatterometer,Water content,Geophysical signal processing,Radiometer
Conference
ISSN
ISBN
Citations 
2153-6996 E-ISBN : 978-1-4673-1158-8
978-1-4673-1158-8
2
PageRank 
References 
Authors
0.40
7
4
Name
Order
Citations
PageRank
W. Wagner111413.79
Sebastian Hahn2626.87
Alexander Gruber3467.08
Wouter Dorigo416721.85