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Tim R. McVicar  - - - 
Top co-authors See all
Niklaus E. Zimmermann

215 shared publications

Swiss Federal Institute for Forest

Wei Liang

178 shared publications

Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou, 571158, China

Okke Batelaan

171 shared publications

Flinders University

Albert I. J. M. Van Dijk

137 shared publications

Fenner School of Environment & Society, Australian National University, Canberra, ACT, Australia

Graeme Newell

102 shared publications

School of Business, University of Western Sydney, Penrith South, Australia

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Publication Record
Distribution of Articles published per year 
(2007 - 2016)
Publications See all
Article 4 Reads 1 Citation Advantages of Using Microwave Satellite Soil Moisture over Gridded Precipitation Products and Land Surface Model Output ... Tiexi Chen, Tim R. McVicar, Guojie Wang, Richard A. M. De Je... Published: 20 May 2016
Remote Sensing, doi: 10.3390/rs8050428
DOI See at publisher website
ABS Show/hide abstract
To improve the understanding of water–vegetation relationships, direct comparative studies assessing the utility of satellite remotely sensed soil moisture, gridded precipitation products, and land surface model output are needed. A case study was investigated for a water-limited, lateral inflow receiving area in northeastern Australia during December 2008 to May 2009. In January 2009, monthly precipitation showed strong positive anomalies, which led to strong positive soil moisture anomalies. The precipitation anomalies disappeared within a month. In contrast, the soil moisture anomalies persisted for months. Positive anomalies of Normalized Difference Vegetation Index (NDVI) appeared in February, in response to water supply, and then persisted for several months. In addition to these temporal characteristics, the spatial patterns of NDVI anomalies were more similar to soil moisture patterns than to those of precipitation and land surface model output. The long memory of soil moisture mainly relates to the presence of clay-rich soils. Modeled soil moisture from four of five global land surface models failed to capture the memory length of soil moisture and all five models failed to present the influence of lateral inflow. This case study indicates that satellite-based soil moisture is a better predictor of vegetation water availability than precipitation in environments having a memory of several months and thus is able to persistently affect vegetation dynamics. These results illustrate the usefulness of satellite remotely sensed soil moisture in ecohydrology studies. This case study has the potential to be used as a benchmark for global land surface model evaluations. The advantages of using satellite remotely sensed soil moisture over gridded precipitation products are mainly expected in lateral-inflow and/or clay-rich regions worldwide.
Article 2 Reads 1 Citation HCAS: A new way to assess the condition of natural habitats for terrestrial biodiversity across whole regions using remo... Tom D. Harwood, Randall J. Donohue, Kristen J. Williams, Sim... Published: 18 May 2016
Methods in Ecology and Evolution, doi: 10.1111/2041-210x.12579
DOI See at publisher website
Article 2 Reads 22 Citations Global-scale regionalization of hydrologic model parameters Hylke E. Beck, Albert I. J. M. Van Dijk, Ad De Roo, Diego G.... Published: 01 May 2016
Water Resources Research, doi: 10.1002/2015wr018247
DOI See at publisher website
ABS Show/hide abstract
Current state-of-the-art models typically applied at continental to global scales (hereafter called macro-scale) tend to use a priori parameters, resulting in suboptimal streamflow (Q) simulation. For the first time, a scheme for regionalization of model parameters at the global scale was developed. We used data from a diverse set of 1787 small-to-medium sized catchments (10-10000 km2) and the simple conceptual HBV model to set up and test the scheme. Each catchment was calibrated against observed daily Q, after which 674 catchments with high calibration and validation scores, and thus presumably good-quality observed Q and forcing data, were selected to serve as donor catchments. The calibrated parameter sets for the donors were subsequently transferred to 0.5° grid cells with similar climatic and physiographic characteristics, resulting in parameter maps for HBV with global coverage. For each grid cell, we used the ten most similar donor catchments, rather than the single most similar donor, and averaged the resulting simulated Q, which enhanced model performance. The 1113 catchments not used as donors were used to independently evaluate the scheme. The regionalized parameters outperformed spatially-uniform (i.e., averaged calibrated) parameters for 79% of the evaluation catchments. Substantial improvements were evident for all major Köppen-Geiger climate types and even for evaluation catchments > 5000 km distant from the donors. The median improvement was about half of the performance increase achieved through calibration. HBV with regionalized parameters outperformed nine state-of-the-art macro-scale models, suggesting these might also benefit from the new regionalization scheme. The produced HBV parameter maps including ancillary data are available via http://water.jrc.ec.europa.eu/HBV/. This article is protected by copyright. All rights reserved.
Article 1 Read 4 Citations Assessing the impact of measurement time interval when calculating wind speed means and trends under the stilling phenom... Cesar Azorin-Molina, Sergio M. Vicente-Serrano, Tim R. McVic... Published: 15 April 2016
International Journal of Climatology, doi: 10.1002/joc.4720
DOI See at publisher website
BOOK-CHAPTER 0 Reads 0 Citations Earth Observations for Monitoring Water Resources Juan P. Guerschman, Randall J. Donohue, Tom G. Van Niel, Lui... Published: 07 April 2016
Earth Observation for Water Resources Management: Current Use and Future Opportunities for the Water Sector, doi: 10.1596/978-1-4648-0475-5_ch6
DOI See at publisher website
BOOK-CHAPTER 2 Reads 0 Citations Assessing the Characteristics of Required and Available Earth Observation Data Juan P. Guerschman, Randall J. Donohue, Tom G. Van Niel, Lui... Published: 07 April 2016
Earth Observation for Water Resources Management: Current Use and Future Opportunities for the Water Sector, doi: 10.1596/978-1-4648-0475-5_ch7
DOI See at publisher website
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