19972020

Research output per year

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Research Output

2011

The third soil moisture active passive experiment

Monerris-Belda, A., Walker, J., Panciera, R., Jackson, T., Gray, D., Yardley, H. & Ryu, D., 2011, MODSIM2011 - 19th International Congress on Modelling and Simulation. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: Modelling and Simulation Society of Australia and New Zealand (MSSANZ), p. 1980 - 1986 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

4 Citations (Scopus)

Towards medium-resolution brightness temperature retrieval from active and passive microwave

Wu, X., Walker, J., Rudiger, C., Panciera, R., Monerris-Belda, A. & Das, N., 2011, MODSIM2011 - 19th International Congress on Modelling and Simulation. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: ACTA Press, p. 2023 - 2029 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Towards soil hydraulic parameter retrieval from land surface models using near-surface soil moisture data

Bandara, R. S., Walker, J., Rudiger, C., Pipunic, R., Dharssi, I. & Gurney, R., 2011, MODSIM2011 - 19th International Congress on Modelling and Simulation. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: Modelling and Simulation Society of Australia and New Zealand (MSSANZ), p. 3342 - 3348 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)

Validation of AMSR-E soil moisture L-band airborne radiometer data from National Airborne Field Experiment 2006

Mladenova, I., Lakshmi, V., Jackson, T., Walker, J., Merlin, O. & De Jeu, R., 2011, In : Remote Sensing of Environment. 115, 8, p. 2096 - 2103 8 p.

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)

Validation of a τ-ω Model with Soil Moisture Active Passive Experiment (SMAPEx) data sets in Australia

Gao, Y., Walker, J., Ryu, D., Panciera, R. & Monerris-Belda, A., 2011, MODSIM 2011 - 19th International Congress on Modelling and Simulation - Sustaining Our Future: Understanding and Living with Uncertainty: Perth, WA, Australia; 12-16 December 2011. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: Modelling and Simulation Society of Australia and New Zealand (MSSANZ), p. 1944-1950 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Validation of microwave remote sensing products over Australia

Rüdiger, C., Walker, J. P. & Kerr, Y. H., 2011, 34th International Symposium on Remote Sensing of Environment: The GEOSS Era: Towards Operational Environmental Monitoring. International Society for Photogrammetry and Remote Sensing (ISPRS), 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Validation of the level 1c and level 2 SMOS products with airborne and ground-based observations

Rudiger, C., Walker, J., Kerr, Y., Mialon, A., Merlin, O. & Kim, E., 2011, MODSIM2011 - 19th International Congress on Modelling and Simulation. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: Modelling and Simulation Society of Australia and New Zealand (MSSANZ), p. 2002 - 2008 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

7 Citations (Scopus)

Validation of the MODIS LAI product in the Murrumbidgee catchment, Australia

McColl, K., Pipunic, R., Ryu, D. & Walker, J., 2011, MODSIM2011 - 19th International Congress on Modelling and Simulation. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: Modelling and Simulation Society of Australia and New Zealand (MSSANZ), p. 1973 - 1979 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

4 Citations (Scopus)

Variational gravity data assimilation to improve soil moisture prediction in a land surface model

Smith, A., Walker, J. & Western, A., 2011, MODSIM2011 - 19th International Congress on Modelling and Simulation. Chan, F., Marinova, D. & Anderssen, R. S. (eds.). Canberra ACT: ACTA Press, p. 3391 - 3397 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2010

An improved algorithm for disaggregating microwave-derived soil moisture based on red, near-infrared and thermal-infrared data

Merlin, O., Al Bitar, A., Walker, J. & Kerr, Y., 2010, In : Remote Sensing of Environment. 114, 10, p. 2305 - 2316 12 p.

Research output: Contribution to journalArticleResearchpeer-review

98 Citations (Scopus)

Disaggregation as a top-down approach for evaluating 40 km resolution SMOS data using point-scale measurements: Application to AACES-1

Merlin, O., Rüdiger, C., Richaume, P., Al Bitar, A., Mialon, A., Walker, J. P. & Kerr, Y. H., 2010, Remote Sensing for Agriculture, Ecosystems, and Hydrology XII. Vol. 7824. 78240I

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

5 Citations (Scopus)

Evaluation of the observation operator Jacobian for leaf area index data assimilation with an extended Kalman filter

Rudiger, C., Albergel, C., Mahfouf, J. -F., Calvet, J. -C. & Walker, J. P., 2010, In : Journal of Geophysical Research. 115, 9, p. 1 - 10 10 p.

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Influence of forest cover fraction on L-band soil moisture retrievals from heterogeneous pixels using multi-angular observations

Grant, J., Van de Griend, A., Wigneron, J. P., Saleh, K., Panciera, R. & Walker, J., 2010, In : Remote Sensing of Environment. 114, 5, p. 1026 - 1037 12 p.

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Land Surface Data Assimilation

Houser, D., De Lannoy, G. & Walker, J., 2010, Data Assimilation: Making Sense of Observations. Lahoz, W., Khattatov, B. & Menard, R. (eds.). Heidelberg, Germany: Springer-Verlag London Ltd., p. 549 - 597 49 p.

Research output: Chapter in Book/Report/Conference proceedingChapter (Book)Researchpeer-review

22 Citations (Scopus)

L-band emission from a Eucalyptus forest in various soil conditions during the nafe campaign

Rahmoune, R., Ferrazzoli, P., Walker, J. P. & Grant, J. P., 2010, 11th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2010 - Proceedings. p. 81-85 5 p. 5559584

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

4 Citations (Scopus)

Monitoring of water and carbon fluxes using a land data assimilation system: a case study for southwestern France

Albergel, C., Calvet, J-C., Mahfouf, J-F., Rudiger, C., Walker, J. & Wigneron, J. P., 2010, In : Hydrology and Earth System Sciences. 14, 6, p. 1109 - 1124 15 p.

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Towards a general equation for frequency domain reflectometers

Rudiger, C., Western, A., Walker, J., Smith, A., Kalma, J. & Willgoose, G., 2010, In : Journal of Hydrology. 383, 3-4, p. 319 - 329 11 p.

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)

Use of soil moisture variability in artificial neural network retrieval of soil moisture

Chai, S-S., Walker, J. P., Makarynskyy, O., Kuhn, M., Veenendaal, B. & West, G., 2010, In : Remote Sensing. 2, 1, p. 166 - 190 25 p.

Research output: Contribution to journalArticleResearchpeer-review

30 Citations (Scopus)

Using long-term water balances to parameterize surface conductances and calculate evaporation at 0.05degrees spatial resolution

Zhang, Y., Leuning, R., Hutley, L. B., Beringer, J., McHugh, I. & Walker, J. P., 2010, In : Water Resources Research. 46, 5, p. 1 - 14 14 p.

Research output: Contribution to journalArticleResearchpeer-review

69 Citations (Scopus)

Validation of the ASAR global monitoring mode soil moisture product using the NAFE'05 data set

Mladenova, I., Lakshmi, V., Walker, J., Panciera, R., Wagner, W. & Doubkova, M., 2010, In : IEEE Transactions on Geoscience and Remote Sensing. 48, 6, p. 2498 - 2508 11 p.

Research output: Contribution to journalArticleResearchpeer-review

35 Citations (Scopus)
2009

An assessment of QuikSCAT ku-Band scatterometer data for soil moisture sensitivity

Mladenova, I., Lakshmi, V., Walker, J. P., Long, D. G. & De Jeu, R., 2009, In : IEEE Geoscience and Remote Sensing Letters. 6, 4, p. 640 - 643 4 p.

Research output: Contribution to journalArticleResearchpeer-review

21 Citations (Scopus)

An EKF assimilation of AMSR-E soil moisture into the ISBA land surface scheme

Draper, C. S., Mahfouf, J-F. -F. & Walker, J. P., 2009, In : Journal of Geophysical Research. 114, 20, p. 1 - 13 13 p.

Research output: Contribution to journalArticleResearchpeer-review

79 Citations (Scopus)

An evaluation of AMSR-E derived soil moisture over Australia

Draper, C. S., Walker, J., Steinle, P. J., De Jeu, R. & Holmes, T. R. H., 2009, In : Remote Sensing of Environment. 113, 4, p. 703 - 710 8 p.

Research output: Contribution to journalArticleResearchpeer-review

268 Citations (Scopus)

A sequential model for disaggregating near-surface soil moisture observations using multi-resolution thermal sensors

Merlin, O., Al Bitar, A., Walker, J. & Kerr, Y., 2009, In : Remote Sensing of Environment. 113, 10, p. 2275 - 2284 10 p.

Research output: Contribution to journalArticleResearchpeer-review

41 Citations (Scopus)

Assessing the SMOS soil moisture retrieval parameters with high-resolution NAFE'06 data

Merlin, O., Walker, J. P., Panciera, R., Escorihuela, M. J. & Jackson, T. J., 2009, In : IEEE Geoscience and Remote Sensing Letters. 6, 4, p. 635 - 639 5 p.

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Evaluation of the SMOS L-MEB passive microwave soil moisture retrieval algorithm

Panciera, R., Walker, J. P., Kalma, J. D., Kim, E. J., Saleh, K. & Wigneron, J. P., 2009, In : Remote Sensing of Environment. 113, 2, p. 435 - 444 10 p.

Research output: Contribution to journalArticleResearchpeer-review

90 Citations (Scopus)

Framework for incorporating spectral observations into steady state analysis of groundwater discharge around the margins of the Great Artesian Basin

Costelloe, J., Matic, V., Western, A. & Walker, J., 2009, The 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation. Anderssen, R. S., Braddock, R. D. & Newham, L. T. H. (eds.). Nedlands WA: UWA Publishing, p. 3690 - 3696 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

High resolution passive microwave response to landscape controls influencing soil moisture patterns: A case study for the Livingstone creek catchment

Summerell, G., Wilford, J., Shoemark, V., Grant, R. & Walker, J., 2009, The 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation - Proceedings. Anderssen, R. S., Braddock, R. D. & Newham, L. T. H. (eds.). Nedlands WA: UWA Publishing, p. 2528 - 2533 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Identification of spaceborne microwave radiometer calibration sites for satellite missions

Rudiger, C., Walker, J., Allahmoradi, M., Barrett, D., Costelloe, J., Gurney, R., Hacker, J., Kerr, Y., Kim, E., LeMarshall, J., Lieff, W., Marks, A., Peischl, S., Ryu, D. & Ye, N., 2009, The 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation - Proceedings. Anderssen, R. S., Braddock, R. D. & Newham, L. T. H. (eds.). Nedlands WA: UWA Publishing, p. 3740 - 3746 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Improved understanding of soil surface roughness parameterization for L-band passive microwave soil moisture retrieval

Panciera, R., Walker, J. P. & Merlin, O., 2009, In : IEEE Geoscience and Remote Sensing Letters. 6, 4, p. 625 - 629 5 p.

Research output: Contribution to journalArticleResearchpeer-review

42 Citations (Scopus)

Introduction to the special issue on airborne field campaigns for soil moisture

Walker, J. P., Kim, E. J. & England, A. W., Oct 2009, In : IEEE Geoscience and Remote Sensing Letters. 6, 4, p. 623-624 2 p., 5229260.

Research output: Contribution to journalEditorialOtherpeer-review

5 Citations (Scopus)

Parameterization of the land parameter retrieval model for L-Band observations using the NAFE'05 data set

De Jeu, R. A. M., Holmes, T. R. H., Panciera, R. & Walker, J. P., 2009, In : IEEE Geoscience and Remote Sensing Letters. 6, 4, p. 630 - 634 5 p.

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)

Soil moisture retrievals at L-band using a two-step inversion approach (COSMOS/NAFE'05 Experiment)

Saleh, K., Kerr, Y. H., Richaume, P., Escorihuela, M. J., Panciera, R., Delwart, S., Boulet, G., Maisongrande, P., Walker, J. P., Wursteisen, P. & Wigneron, J. P., 2009, In : Remote Sensing of Environment. 113, 6, p. 1304 - 1312 9 p.

Research output: Contribution to journalArticleResearchpeer-review

52 Citations (Scopus)

The effect of rock cover fraction on the retrieval of surface soil moisture at L-band

Ye, N., Walker, J., Panciera, R., Ryu, D., Rudiger, C. & Gurney, R., 2009, The 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation. Anderssen, R. S., Braddock, R. D. & Newham, L. T. H. (eds.). Nedlands WA: UWA Publishing, p. 3761 - 3767 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Towards SMOS validation in south-eastern Australia

Azcurra, C. & Walker, J., 2009, The18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation - Proceedings. Anderssen, R. S., Braddock, R. D. & Newham, L. T. H. (eds.). Nedlands WA: UWA Publishing, p. 3675 - 3681 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

7 Citations (Scopus)

Towards validation of SMOS using airborne and ground data over the Murrumbidgee catchment

Peischl, S., Walker, J., Allahmoradi, M., Barrett, D., Gurney, R., Kerr, Y., Kim, E., LeMarshall, J., Rudiger, C., Ryu, D. & Ye, N., 2009, The 18th World IMACS Congress and MODSIM09 International Congress on Modelling and Simulation. Anderssen, R. S., Braddock, R. D. & Newham, L. T. H. (eds.). Nedlands WA: UWA Publishing, p. 3733 - 3739 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

14 Citations (Scopus)

Using passive microwave response to soil moisture change for soil mapping: A case study for the Livingstone Creek catchment

Summerell, G., Shoemark, V., Grant, S. & Walker, J. P., 2009, In : IEEE Geoscience and Remote Sensing Letters. 6, 4, p. 649 - 652 4 p.

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)
2008

A simple method to disaggregate passive microwave-based soil moisture

Merlin, O., Chehbouni, A., Walker, J., Panciera, R. & Kerr, Y., 2008, In : IEEE Transactions on Geoscience and Remote Sensing. 46, 3, p. 786 - 796 11 p.

Research output: Contribution to journalArticleResearchpeer-review

42 Citations (Scopus)

Assimilation of remotely sensed data for improved latent and sensible heat flux prediction: A comparative synthetic study

Pipunic, R., Walker, J. & Western, A., 2008, In : Remote Sensing of Environment. 112, 4, p. 1295 - 1305 11 p.

Research output: Contribution to journalArticleResearchpeer-review

68 Citations (Scopus)

Comparison of microwave and infrared land surface temperature products over the NAFE'06 research sites

Parinussa, R. M., De Jeu, R., Holmes, T. R. H. & Walker, J., 2008, In : IEEE Geoscience and Remote Sensing Letters. 5, 4, p. 783 - 787 5 p.

Research output: Contribution to journalArticleResearchpeer-review

23 Citations (Scopus)

Ensemble member generation for sequential data assimilation

Turner, M. R. J., Walker, J. & Oke, P. R., 2008, In : Remote Sensing of Environment. 112, 4, p. 1421 - 1433 13 p.

Research output: Contribution to journalArticleResearchpeer-review

45 Citations (Scopus)

Explicit inverse of soil moisture retrieval with an artificial neural network using passive microwave remote sensing data

Chai, S. S., Veenendaal, B., West, G. & Walker, J. P., 1 Dec 2008, 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings. 1 ed. 4779086. (International Geoscience and Remote Sensing Symposium (IGARSS); vol. 2, no. 1).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

2 Citations (Scopus)

Input pattern according to standard deviation of backpropagation neural network: Influence on accuracy of soil moisture retrieval

Chai, S. S., Veenendaal, B., West, G. & Walker, J. P., 1 Dec 2008, 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings. 1 ed. 4779087. (International Geoscience and Remote Sensing Symposium (IGARSS); vol. 2, no. 1).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

1 Citation (Scopus)

Ku-band sensitivity to soil moisture. An evaluation study for monitoring temporal soil moisture change detection over the NAFE06 study area

Mladenova, I., Lakshmi, V., Jackson, T. & Walker, J., 1 Dec 2008, 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings. 1 ed. 4779116. (International Geoscience and Remote Sensing Symposium (IGARSS); vol. 2, no. 1).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

1 Citation (Scopus)

Sunglint observations over land from ground and airborne L-band radiometer data

Escorihuela, M. J., Saleh, K., Richaume, P., Merlin, O., Walker, J. & Kerr, Y., 2008, In : Geophysical Research Letters. 35, 20, p. 1 - 5 5 p.

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

The NAFE'05/CoSMOS data set: Toward SMOS soil moisture retrieval, downscaling, and assimilation

Panciera, R., Walker, J., Kalma, J. D., Kim, E. J., Hacker, J., Merlin, O., Berger, M. & Skou, N., 2008, In : IEEE Transactions on Geoscience and Remote Sensing. 46, 3, p. 736 - 745 10 p.

Research output: Contribution to journalArticleResearchpeer-review

87 Citations (Scopus)

The NAFE'06 data set: Towards soil moisture retrieval at intermediate resolution

Merlin, O., Walker, J., Kalma, J. D., Kim, E. J., Hacker, J., Panciera, R., Young, R., Summerell, G., Hornbuckle, J., Hafeez, M. & Jackson, T., 2008, In : Advances in Water Resources. 31, 11, p. 1444 - 1455 12 p.

Research output: Contribution to journalArticleResearchpeer-review

70 Citations (Scopus)

Towards deterministic downscaling of SMOS soil moisture using MODIS derived soil evaporative efficiency

Merlin, O., Walker, J., Chehbouni, A. & Kerr, Y., 2008, In : Remote Sensing of Environment. 112, 10, p. 3935 - 3946 12 p.

Research output: Contribution to journalArticleResearchpeer-review

136 Citations (Scopus)
2007

Dry-end surface soil moisture variability during NAFE'06

Teuling, A. J., Uijlenhoet, R., Hurkmans, R., Merlin, O., Panciera, R., Walker, J. & Troch, P. A., 2007, In : Geophysical Research Letters. 34, 17, p. 1 - 5 5 p.

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Effect of one-dimensional field data assimilation on land surface model flux estimates with implications for improved numerical weather prediction

Pipunic, R. C., Walker, J. P., Trudinger, C. & Western, A. W., 1 Dec 2007, MODSIM07 - Land, Water and Environmental Management: Integrated Systems for Sustainability, Proceedings. p. 1736-1742 7 p. (MODSIM07 - Land, Water and Environmental Management: Integrated Systems for Sustainability, Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther