Comparison of downscaling techniques for high resolution soil moisture mapping

Sabah Sabaghy; Jeffrey Walker; Luigi Renzullo; Ruzbeh Akbar; Steven Chan; Julian Chaubell; Narendra Das; R. Scott Dunbar; Dara Entekhabi; Anouk Gevaert; Thomas Jackson; Olivier Merlin; Mahta Moghaddam; Jinzheng Peng; Jeffrey Piepmeier; Maria Piles; Gerard Portal; Christoph Rudiger; Vivien Stefan; Xiaoling Wu; Nan Ye; Simon Yueh

doi:10.1109/IGARSS.2017.8127508

Comparison of downscaling techniques for high resolution soil moisture mapping

Sabah Sabaghy, Jeffrey Walker, Luigi Renzullo, Ruzbeh Akbar, Steven Chan, Julian Chaubell, Narendra Das, R. Scott Dunbar, Dara Entekhabi, Anouk Gevaert, Thomas Jackson, Olivier Merlin, Mahta Moghaddam, Jinzheng Peng, Jeffrey Piepmeier, Maria Piles, Gerard Portal, Christoph Rudiger, Vivien Stefan, Xiaoling WuNan Ye, Simon Yueh

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Citations (Scopus)

Abstract

Soil moisture impacts exchanges of water, energy and carbon fluxes between the land surface and the atmosphere. Passive microwave remote sensing at L-band can capture spatial and temporal patterns of soil moisture in the landscape. Both ESA and NASA have launched L-band radiometers, in the form of the SMOS and SMAP satellites respectively, to monitor soil moisture globally, every 3-day at about 40 km resolution. However, their coarse scale restricts the range of applications. While SMAP included an L-band radar to downscale the radiometer soil moisture to 9 km, the radar failed after 3 months and this initial approach is not applicable to developing a consistent long term soil moisture product across the two missions anymore. Existing optical-, radiometer-, and oversampling-based downscaling methods could be an alternative to the radar-based approach for delivering such data. Nevertheless, retrieval of a consistent high resolution soil moisture product remains a challenge, and there has been no comprehensive intercomparison of the alternate approaches. This research undertakes an assessment of the different downscaling approaches using the SMAPEx-4 field campaign data.

Original language	English
Title of host publication	2017 IEEE International Geoscience and Remote Sensing Symposium
Subtitle of host publication	International Cooperation for Global Awareness, IGARSS 2017 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2523-2526
Number of pages	4
ISBN (Electronic)	9781509049516
DOIs	https://doi.org/10.1109/IGARSS.2017.8127508
Publication status	Published - 1 Dec 2017
Externally published	Yes
Event	37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017 - Fort Worth, United States Duration: 23 Jul 2017 → 28 Jul 2017

Publication series

Name	International Geoscience and Remote Sensing Symposium (IGARSS)
Volume	2017-July

Conference

Conference	37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017
Country/Territory	United States
City	Fort Worth
Period	23/07/17 → 28/07/17

Access to Document

10.1109/IGARSS.2017.8127508

Cite this

Sabaghy, S., Walker, J., Renzullo, L., Akbar, R., Chan, S., Chaubell, J., Das, N., Dunbar, R. S., Entekhabi, D., Gevaert, A., Jackson, T., Merlin, O., Moghaddam, M., Peng, J., Piepmeier, J., Piles, M., Portal, G., Rudiger, C., Stefan, V., ... Yueh, S. (2017). Comparison of downscaling techniques for high resolution soil moisture mapping. In 2017 IEEE International Geoscience and Remote Sensing Symposium: International Cooperation for Global Awareness, IGARSS 2017 - Proceedings (pp. 2523-2526). Article 8127508 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2017-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IGARSS.2017.8127508

Sabaghy, Sabah ; Walker, Jeffrey ; Renzullo, Luigi et al. / Comparison of downscaling techniques for high resolution soil moisture mapping. 2017 IEEE International Geoscience and Remote Sensing Symposium: International Cooperation for Global Awareness, IGARSS 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 2523-2526 (International Geoscience and Remote Sensing Symposium (IGARSS)).

@inproceedings{3cbacd31b2c64be3b648ade5b6700d7c,

title = "Comparison of downscaling techniques for high resolution soil moisture mapping",

abstract = "Soil moisture impacts exchanges of water, energy and carbon fluxes between the land surface and the atmosphere. Passive microwave remote sensing at L-band can capture spatial and temporal patterns of soil moisture in the landscape. Both ESA and NASA have launched L-band radiometers, in the form of the SMOS and SMAP satellites respectively, to monitor soil moisture globally, every 3-day at about 40 km resolution. However, their coarse scale restricts the range of applications. While SMAP included an L-band radar to downscale the radiometer soil moisture to 9 km, the radar failed after 3 months and this initial approach is not applicable to developing a consistent long term soil moisture product across the two missions anymore. Existing optical-, radiometer-, and oversampling-based downscaling methods could be an alternative to the radar-based approach for delivering such data. Nevertheless, retrieval of a consistent high resolution soil moisture product remains a challenge, and there has been no comprehensive intercomparison of the alternate approaches. This research undertakes an assessment of the different downscaling approaches using the SMAPEx-4 field campaign data.",

keywords = "comparison, downscaling, soil moisture",

author = "Sabah Sabaghy and Jeffrey Walker and Luigi Renzullo and Ruzbeh Akbar and Steven Chan and Julian Chaubell and Narendra Das and Dunbar, {R. Scott} and Dara Entekhabi and Anouk Gevaert and Thomas Jackson and Olivier Merlin and Mahta Moghaddam and Jinzheng Peng and Jeffrey Piepmeier and Maria Piles and Gerard Portal and Christoph Rudiger and Vivien Stefan and Xiaoling Wu and Nan Ye and Simon Yueh",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017 ; Conference date: 23-07-2017 Through 28-07-2017",

year = "2017",

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doi = "10.1109/IGARSS.2017.8127508",

language = "English",

series = "International Geoscience and Remote Sensing Symposium (IGARSS)",

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Sabaghy, S, Walker, J, Renzullo, L, Akbar, R, Chan, S, Chaubell, J, Das, N, Dunbar, RS, Entekhabi, D, Gevaert, A, Jackson, T, Merlin, O, Moghaddam, M, Peng, J, Piepmeier, J, Piles, M, Portal, G, Rudiger, C, Stefan, V, Wu, X, Ye, N & Yueh, S 2017, Comparison of downscaling techniques for high resolution soil moisture mapping. in 2017 IEEE International Geoscience and Remote Sensing Symposium: International Cooperation for Global Awareness, IGARSS 2017 - Proceedings., 8127508, International Geoscience and Remote Sensing Symposium (IGARSS), vol. 2017-July, Institute of Electrical and Electronics Engineers Inc., pp. 2523-2526, 37th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2017, Fort Worth, United States, 23/07/17. https://doi.org/10.1109/IGARSS.2017.8127508

Comparison of downscaling techniques for high resolution soil moisture mapping. / Sabaghy, Sabah; Walker, Jeffrey; Renzullo, Luigi et al.
2017 IEEE International Geoscience and Remote Sensing Symposium: International Cooperation for Global Awareness, IGARSS 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017. p. 2523-2526 8127508 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2017-July).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Comparison of downscaling techniques for high resolution soil moisture mapping

AU - Sabaghy, Sabah

AU - Walker, Jeffrey

AU - Renzullo, Luigi

AU - Akbar, Ruzbeh

AU - Chan, Steven

AU - Chaubell, Julian

AU - Das, Narendra

AU - Dunbar, R. Scott

AU - Entekhabi, Dara

AU - Gevaert, Anouk

AU - Jackson, Thomas

AU - Merlin, Olivier

AU - Moghaddam, Mahta

AU - Peng, Jinzheng

AU - Piepmeier, Jeffrey

AU - Piles, Maria

AU - Portal, Gerard

AU - Rudiger, Christoph

AU - Stefan, Vivien

AU - Wu, Xiaoling

AU - Ye, Nan

AU - Yueh, Simon

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Soil moisture impacts exchanges of water, energy and carbon fluxes between the land surface and the atmosphere. Passive microwave remote sensing at L-band can capture spatial and temporal patterns of soil moisture in the landscape. Both ESA and NASA have launched L-band radiometers, in the form of the SMOS and SMAP satellites respectively, to monitor soil moisture globally, every 3-day at about 40 km resolution. However, their coarse scale restricts the range of applications. While SMAP included an L-band radar to downscale the radiometer soil moisture to 9 km, the radar failed after 3 months and this initial approach is not applicable to developing a consistent long term soil moisture product across the two missions anymore. Existing optical-, radiometer-, and oversampling-based downscaling methods could be an alternative to the radar-based approach for delivering such data. Nevertheless, retrieval of a consistent high resolution soil moisture product remains a challenge, and there has been no comprehensive intercomparison of the alternate approaches. This research undertakes an assessment of the different downscaling approaches using the SMAPEx-4 field campaign data.

AB - Soil moisture impacts exchanges of water, energy and carbon fluxes between the land surface and the atmosphere. Passive microwave remote sensing at L-band can capture spatial and temporal patterns of soil moisture in the landscape. Both ESA and NASA have launched L-band radiometers, in the form of the SMOS and SMAP satellites respectively, to monitor soil moisture globally, every 3-day at about 40 km resolution. However, their coarse scale restricts the range of applications. While SMAP included an L-band radar to downscale the radiometer soil moisture to 9 km, the radar failed after 3 months and this initial approach is not applicable to developing a consistent long term soil moisture product across the two missions anymore. Existing optical-, radiometer-, and oversampling-based downscaling methods could be an alternative to the radar-based approach for delivering such data. Nevertheless, retrieval of a consistent high resolution soil moisture product remains a challenge, and there has been no comprehensive intercomparison of the alternate approaches. This research undertakes an assessment of the different downscaling approaches using the SMAPEx-4 field campaign data.

KW - comparison

KW - downscaling

KW - soil moisture

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DO - 10.1109/IGARSS.2017.8127508

M3 - Conference contribution

T3 - International Geoscience and Remote Sensing Symposium (IGARSS)

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EP - 2526

BT - 2017 IEEE International Geoscience and Remote Sensing Symposium

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Sabaghy S, Walker J, Renzullo L, Akbar R, Chan S, Chaubell J et al. Comparison of downscaling techniques for high resolution soil moisture mapping. In 2017 IEEE International Geoscience and Remote Sensing Symposium: International Cooperation for Global Awareness, IGARSS 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2017. p. 2523-2526. 8127508. (International Geoscience and Remote Sensing Symposium (IGARSS)). doi: 10.1109/IGARSS.2017.8127508

Comparison of downscaling techniques for high resolution soil moisture mapping

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