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A distributed-temperature-sensing-based soil temperature profiler

Schilperoort, B. (author), JIMENEZ RODRIGUEZ, C.D. (author), van de Wiel, B.J.H. (author), Coenders-Gerrits, Miriam (author)

Storage change in heat in the soil is one of the main components of the energy balance and is essential in studying the land-Atmosphere heat exchange. However, its measurement proves to be difficult due to (vertical) soil heterogeneity and sensors easily disturbing the soil. Improvements in the precision and resolution of distributed...

journal article 2024

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Measuring rainfall using microwave links: the influence of temporal sampling

van der Valk, L.D. (author), Coenders-Gerrits, Miriam (author), Hut, R.W. (author), Overeem, A. (author), Walraven, B. (author), Uijlenhoet, R. (author)

Terrestrial microwave links are increasingly being used to estimate path-averaged precipitation by determining the attenuation caused by rainfall along the link path, mostly with commercial microwave links from cellular telecommunication networks. However, the temporal resolution of these rainfall estimates and the method to derive them are...

journal article 2024

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Phenophase-based comparison of field observations to satellite-based actual evaporation estimates of a natural woodland: miombo woodland, southern Africa

Zimba, H.M. (author), Coenders-Gerrits, Miriam (author), Kawawa, Banda (author), Schilperoort, B. (author), van de Giesen, N.C. (author), Nyambe, Imasiku (author), Savenije, Hubert (author)

The trend and magnitude of actual evaporation across the phenophases of miombo woodlands are unknown. This is because estimating evaporation in African woodland ecosystems continues to be a challenge, as flux observation towers are scant if not completely lacking in most ecosystems. Furthermore, significant phenophase-based discrepancies in both...

journal article 2023

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Shower thoughts: why scientists should spend more time in the rain

Van Stan, John T. (author), Allen, Scott T. (author), Aubrey, Douglas P. (author), Carter Berry, Z. (author), Biddick, Matthew (author), Coenders-Gerrits, Miriam (author), Giordani, Paolo (author), Gotsch, Sybil G. (author), Gutmann, Ethan D. (author)

Stormwater is a vital resource and dynamic driver of terrestrial ecosystem processes. However, processes controlling interactions during and shortly after storms are often poorly seen and poorly sensed when direct observations are substituted with technological ones. We discuss how human observations complement technological ones and the...

review 2023

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Correcting Thornthwaite potential evapotranspiration using a global grid of local coefficients to support temperature-based estimations of reference evapotranspiration and aridity indices

Aschonitis, Vassilis (author), Touloumidis, D.T. (author), ten Veldhuis, Marie-claire (author), Coenders-Gerrits, Miriam (author)

Thornthwaite's formula is globally an optimum candidate for large-scale applications of potential evapotranspiration and aridity assessment at different climates and landscapes since it has lower data requirements compared to other methods and especially from the ASCE-standardized reference evapotranspiration (formerly FAO-56), which is the...

journal article 2022

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Plants, Vital Players in the Terrestrial Water Cycle

van den Berg, Tomas E. (author), Dutta, S. (author), Kaiser, Elias (author), Vialet-Chabrand, Silvere (author), van der Ploeg, Martine (author), van Emmerik, Tim (author), Coenders-Gerrits, Miriam (author), ten Veldhuis, Marie-claire (author)

Plant transpiration accounts for about half of all terrestrial evaporation. Plants need water for many vital functions including nutrient uptake, growth and leaf cooling. The regulation of plant water transport by stomata in the leaves leads to the loss of 97% of the water that is taken up via their roots, to the atmosphere. Measuring plant...

book chapter 2022

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Detecting nighttime inversions in the interior of a Douglas fir canopy

Schilperoort, B. (author), Coenders-Gerrits, Miriam (author), JIMENEZ RODRIGUEZ, C.D. (author), van Hooft, J.A. (author), van de Wiel, B.J.H. (author), Savenije, Hubert (author)

Despite the importance of forests in the water and carbon cycles, accurately measuring their contribution remains challenging, especially at night. During clear-sky nights current models and theories fail, as non-turbulent flows and spatial heterogeneity become more important. One of the standing issues is the ‘decoupling’ of the air masses...

journal article 2022

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Reduction of vegetation-accessible water storage capacity after deforestation affects catchment travel time distributions and increases young water fractions in a headwater catchment

Hrachowitz, M. (author), Stockinger, M. (author), Coenders-Gerrits, Miriam (author), van der Ent, R.J. (author), Bogena, H. (author), Lücke, A. (author), Stumpp, C. (author)

Deforestation can considerably affect transpiration dynamics and magnitudes at the catchment scale and thereby alter the partitioning between drainage and evaporative water fluxes released from terrestrial hydrological systems. However, it has so far remained problematic to directly link reductions in transpiration to changes in the physical...

journal article 2021

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Vapor plumes in a tropical wet forest: Spotting the invisible evaporation

JIMENEZ RODRIGUEZ, C.D. (author), Coenders-Gerrits, Miriam (author), Schilperoort, B. (author), del Pilar González-Angarita, Adriana (author), Savenije, Hubert (author)

Forest evaporation exports a vast amount of water vapor from land ecosystems into the atmosphere. Meanwhile, evaporation during rain events is neglected or considered of minor importance in dense ecosystems. Air convection moves the water vapor upwards leading to the formation of large invisible vapor plumes, while the identification of...

journal article 2021

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Rainfall interception and redistribution by a common North American understory and pasture forb, Eupatorium capillifolium (Lam. dogfennel)

Gordon, D. Alex R. (author), Coenders-Gerrits, Miriam (author), Sellers, Brent A. (author), Sadeghi, S. M.Moein (author), Van Stan, John T. (author)

In vegetated landscapes, rain must pass through plant canopies and litter to enter soils. As a result, some rainwater is returned to the atmosphere (i.e., interception, I ) and the remainder is partitioned into a canopy (and gap) drip flux (i.e., throughfall) or drained down the stem (i.e., stemflow). Current theoretical and numerical...

journal article 2020

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Decoupling of a Douglas fir canopy: A look into the subcanopy with continuous vertical temperature profiles

Schilperoort, B. (author), Coenders-Gerrits, Miriam (author), JIMENEZ RODRIGUEZ, C.D. (author), van der Tol, Christiaan (author), van de Wiel, B.J.H. (author), Savenije, Hubert (author)

Complex ecosystems such as forests make accurately measuring atmospheric energy and matter fluxes difficult. One of the issues that can arise is that parts of the canopy and overlying atmosphere can be turbulently decoupled from each other, meaning that the vertical exchange of energy and matter is reduced or hampered. This complicates flux...

journal article 2020

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Parameterization and Application of Stanghellini Model for Estimating Greenhouse Cucumber Transpiration

Yan, H. (author), Huang, Song (author), Zhang, C. (author), Coenders-Gerrits, Miriam (author), Wang, Guoqing (author), Zhang, Jianyun (author), Zhao, Baoshan (author), Acquah, Samuel Joe (author), Wu, Haimei (author), Fu, Hanwen (author)

Accurate estimation of transpiration (Tr) is important in the development of precise irrigation scheduling and to enhance water-use efficiency in agricultural production. In this study, the air temperature (Ta) and relative humidity (RH) were measured at three different heights (0.5, 1.0, and 1.8 m above the ground near the plant canopy)...

journal article 2020

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Budyko framework: towards non-steady state conditions

Mianabadi, Ameneh (author), Davary, Kamran (author), Pourreza-Bilondi, Mohsen (author), Coenders-Gerrits, Miriam (author)

The Budyko framework was firstly developed to estimate actual evaporation as a function of precipitation and the aridity index at steady state conditions. Based on this framework, the water storage change in the watershed is assumed to be negligible at large spatial and temporal scales. However, steady state conditions are not valid for many...

review 2020

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Contribution of understory evaporation in a tropical wet forest during the dry season

JIMENEZ RODRIGUEZ, C.D. (author), Coenders-Gerrits, Miriam (author), Wenninger, J.W. (author), Gonzalez-Angarita, Adriana (author), Savenije, Hubert (author)

Tropical wet forests are complex ecosystems with a large number of plant species. These environments are characterized by a high water availability throughout the whole year and a complex canopy structure. However, how the different sections of the canopy contribute to total evaporation is poorly understood. The aim of this work is to...

journal article 2020

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Variations in canopy cover and its relationship with canopy water and temperature in the miombo woodland based on satellite data

Zimba, H.M. (author), Coenders-Gerrits, Miriam (author), Kawawa, Banda (author), Savenije, Hubert (author), Nyambe, Imasiku (author), Winsemius, H.C. (author)

Understanding the canopy cover relationship with canopy water content and canopy temperature in the Miombo ecosystem is important for studying the consequences of climate change. To better understand these relationships, we studied the satellite data-based land surface temperature (LST) as proxy for canopy temperature, leaf area index (LAI),...

journal article 2020

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Revisiting wind speed measurements using actively heated fiber optics: A wind tunnel study

van Ramshorst, Justus G.V. (author), Coenders-Gerrits, Miriam (author), Schilperoort, B. (author), van de Wiel, B.J.H. (author), Izett, J.G. (author), Selker, J.S. (author), Higgins, Chad W. (author), Savenije, Hubert (author), van de Giesen, N.C. (author)

Near-surface wind speed is typically only measured by point observations. The actively heated fiber-optic (AHFO) technique, however, has the potential to provide high-resolution distributed observations of wind speeds, allowing for better spatial characterization of fine-scale processes. Before AHFO can be widely used, its performance needs...

journal article 2020

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Reviews and syntheses: Turning the challenges of partitioning ecosystem evaporation and transpiration into opportunities

Stoy, Paul C. (author), El-Madany, Tarek S. (author), Fisher, Joshua B. (author), Gentine, Pierre (author), Gerken, Tobias (author), Good, Stephen P. (author), Klosterhalfen, Anne (author), Perez-Priego, Oscar (author), Coenders-Gerrits, Miriam (author)

Evaporation (E) and transpiration (T) respond differently to ongoing changes in climate, atmospheric composition, and land use. It is difficult to partition ecosystem-scale evapotranspiration (ET) measurements into E and T, which makes it difficult to validate satellite data and land surface models. Here, we review current progress in...

journal article 2019

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Missed Fog: Understanding the Growth of Fog from the Ground Up

Izett, J.G. (author), van de Wiel, B.J.H. (author), Schilperoort, B. (author), Coenders-Gerrits, Miriam (author), Baas, P. (author), Bosveld, Fred C. (author)

Conventional in situ observations of visibility and other meteorological variables are restricted to a limited number of heights near the surface, with the lowest observation often made above 1 m. This can result in missed observations of shallow fog as well as the initial growth stage of thicker fog layers. At the same time, numerical...

poster 2019

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Missed Fog?: On the Potential of Obtaining Observations at Increased Resolution During Shallow Fog Events

Izett, J.G. (author), Schilperoort, Bart (author), Coenders-Gerrits, Miriam (author), Baas, P. (author), Bosveld, Fred C. (author), van de Wiel, B.J.H. (author)

Conventional in situ observations of meteorological variables are restricted to a limited number of levels near the surface, with the lowest observation often made around 1-m height. This can result in missed observations of both shallow fog, and the initial growth stage of thicker fog layers. At the same time, numerical experiments have...

journal article 2019

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What Do Plants Leave after Summer on the Ground?: The Effect of Afforested Plants in Arid Environments

JIMENEZ RODRIGUEZ, C.D. (author), Coenders-Gerrits, Miriam (author), Uhlenbrook, S. (author), Wenninger, J.W. (author)

The implementation of afforestation programs in arid environments in northern China had modified the natural vegetation patterns. This increases the evaporation flux; however, the influence of these new covers on the soil water conditions is poorly understood. This work aims to describe the effect of Willow bushes (Salix psammophila C. Wang...

journal article 2019