Journal ArticleDOI
Soil Moisture Measurement for Ecological and Hydrological Watershed-Scale Observatories: A Review
David A. Robinson,Colin S. Campbell,Jan W. Hopmans,Brian K. Hornbuckle,Scott B. Jones,Rosemary Knight,Fred L. Ogden,John S. Selker,Ole Wendroth +8 more
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TLDR
In this article, the authors review advances in sensor technology, particularly emerging geophysical methods and distributed sensors, aimed at bridging this gap and offer a vision for future research, listing many of the current scientific and technical challenges.Abstract:
At the watershed scale, soil moisture is the major control for rainfall–runoff response, especially where saturation excess runoff processes dominate. From the ecological point of view, the pools of soil moisture are fundamental ecosystem resources providing the transpirable water for plants. In drylands particularly, soil moisture is one of the major controls on the structure, function, and diversity in ecosystems. In terms of the global hydrological cycle, the overall quantity of soil moisture is small, ∼0.05%; however, its importance to the global energy balance and the distribution of precipitation far outweighs its physical amount. In soils it governs microbial activity that affects important biogeochemical processes such as nitrification and CO2 production via respiration. During the past 20 years, technology has advanced considerably, with the development of different electrical sensors for determining soil moisture at a point. However, modeling of watersheds requires areal averages. As a result, point measurements and modeling grid cell data requirements are generally incommensurate. We review advances in sensor technology, particularly emerging geophysical methods and distributed sensors, aimed at bridging this gap. We consider some of the data analysis methods for upscaling from a point to give an areal average. Finally, we conclude by offering a vision for future research, listing many of the current scientific and technical challenges.read more
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Journal ArticleDOI
Investigating soil moisture-climate interactions in a changing climate: A review
Sonia I. Seneviratne,T. Corti,Edouard Davin,Martin Hirschi,Eric B. Jaeger,Irene Lehner,Boris Orlowsky,Adriaan J. Teuling +7 more
TL;DR: In this paper, the authors provide a synthesis of past research on the role of soil moisture for the climate system, based both on modelling and observational studies, focusing on soil moisture-temperature and soil moistureprecipitation feedbacks, and their possible modifications with climate change.
Journal ArticleDOI
The International Soil Moisture Network: a data hosting facility for global in situ soil moisture measurements
Wouter Dorigo,Wolfgang Wagner,R. Hohensinn,Sebastian Hahn,Christoph Paulik,Angelika Xaver,Alexander Gruber,Matthias Drusch,Susanne Mecklenburg,P. J. van Oevelen,Alan Robock,Thomas J. Jackson +11 more
TL;DR: The International Soil Moisture Network (ISMN) as discussed by the authors is a centralized data hosting facility where globally available in situ soil moisture measurements from operational networks and validation campaigns are collected, harmonized, and made available to users.
Journal ArticleDOI
A decade of Predictions in Ungauged Basins (PUB)—a review
Markus Hrachowitz,Hubert H. G. Savenije,Günter Blöschl,Jeffrey J. McDonnell,Murugesu Sivapalan,John W. Pomeroy,Berit Arheimer,Theresa Blume,Martyn P. Clark,Uwe Ehret,Fabrizio Fenicia,Jim Freer,Alexander Gelfan,Hoshin V. Gupta,Denis A. Hughes,Rolf Hut,Alberto Montanari,Saket Pande,Doerthe Tetzlaff,Peter Troch,Stefan Uhlenbrook,Thibaut Wagener,Hessel Winsemius,Ross Woods,Erwin Zehe,Christophe Cudennec +25 more
TL;DR: The Prediction in Ungauged Basins (PUB) initiative of the International Association of Hydrological Sciences (IAHS) launched in 2003 and concluded by the PUB Symposium 2012 held in Delft (23-25 October 2012), set out to shift the scientific culture of hydrology towards improved scientific understanding of hydrological processes, as well as associated uncertainties and the development of models with increasing realism and predictive power as discussed by the authors.
Journal ArticleDOI
On the value of soil moisture measurements in vadose zone hydrology: a review
Harry Vereecken,Johan Alexander Huisman,Heye Bogena,Jan Vanderborght,Jasper A. Vrugt,Jan W. Hopmans +5 more
TL;DR: In this article, the authors highlight and review the state of the art in using soil moisture measurements for estimation of soil hydraulic properties, quantification of water and energy fluxes, and retrieval of spatial and temporal dynamics of soil moisture profiles.
Journal ArticleDOI
Upscaling sparse ground‐based soil moisture observations for the validation of coarse‐resolution satellite soil moisture products
Wade T. Crow,Aaron A. Berg,Michael H. Cosh,Alexander Loew,Binayak P. Mohanty,Rocco Panciera,Patricia de Rosnay,Dongryeol Ryu,Jeffrey P. Walker +8 more
TL;DR: In this paper, the authors describe the magnitude of the soil moisture upscaling problem and measurement density requirements for ground-based soil moisture networks, and summarize a number of existing soil moisture-upscaling strategies which may reduce the detrimental impact of spatial sampling errors on the reliability of satellite soil moisture validation using spatially sparse ground based observations.
References
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Journal ArticleDOI
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