Global Scale Mapping of Subsurface Scattering Signals Impacting ASCAT Soil Moisture Retrievals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F24%3A00598443" target="_blank" >RIV/86652079:_____/24:00598443 - isvavai.cz</a>
Alternative codes found
RIV/62156489:43210/24:43925699
Result on the web
<a href="https://ieeexplore.ieee.org/document/10601171" target="_blank" >https://ieeexplore.ieee.org/document/10601171</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TGRS.2024.3429550" target="_blank" >10.1109/TGRS.2024.3429550</a>
Alternative languages
Result language
angličtina
Original language name
Global Scale Mapping of Subsurface Scattering Signals Impacting ASCAT Soil Moisture Retrievals
Original language description
Soil moisture retrievals from the Advanced Scatterometer (ASCAT) have so far relied on the assumption that soil backscatter increases monotonically with soil moisture content. However, under dry soil conditions, discontinuities in the soil profile caused by the presence of stones, rocks, or distinct soil layers may disturb this relation, causing backscatter to decrease with increasing soil wetness. As of yet, subsurface scattering is a poorly understood phenomenon and some of its manifestations on ASCAT soil moisture retrievals have in the past been wrongly attributed to topographic effects or changes in soil surface roughness and vegetation. Therefore, this study aims at mapping subsurface scattering effects on a global scale, explore their dependency on land surface characteristics, and describe the impacts on ASCAT soil moisture retrievals. The results obtained with one statistical and two physically based indicators show that the subsurface scattering is not only widespread in desert regions but also in more humid climates with a dry season. Along with the dryness of the soil, the presence of coarse fragments in the soil profile and sparse vegetation cover are important factors that favor its occurrence. The impact on ASCAT soil moisture retrievals is severe, making subsurface scattering the most significant source of unaccounted errors in the current version of the ASCAT soil moisture data as provided by the EUMETSAT Satellite Application Facility on Support to Operational Hydrology and Water Management. Users of the product are recommended to mask soil moisture data affected by subsurface scattering effects using the indicators and masks developed in this study.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20705 - Remote sensing
Result continuities
Project
<a href="/en/project/EF16_019%2F0000797" target="_blank" >EF16_019/0000797: SustES - Adaptation strategies for sustainable ecosystem services and food security under adverse environmental conditions</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Transactions on Geoscience and Remote Sensing and IEEE Transactions on Geoscience Electronics
ISSN
0196-2892
e-ISSN
1558-0644
Volume of the periodical
62
Issue of the periodical within the volume
SEP
Country of publishing house
US - UNITED STATES
Number of pages
20
Pages from-to
4509520
UT code for WoS article
001294369400010
EID of the result in the Scopus database
2-s2.0-85198705916