Radiative cooling for dew condensation

Trosseille, Joachim; Mongruel, Anne; Royon, Laurent; Beysens, Daniel

doi:10.1016/j.ijheatmasstransfer.2021.121160

Cited by 21 publications

(18 citation statements)

References 35 publications

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“…Thus, the anatomical and physiological changes in the plant leaves might also be a possible explanation of higher dew amounts because surface properties (i.e. radiative and wetting) are of crucial impor-tance for the formation of dew and dew yield (Trosseille et al, 2021).…”

Section: Response Of Water Fluxes To Climatic Changesmentioning

confidence: 99%

Response of water fluxes and biomass production to climate change in permanent grassland soil ecosystems

Forstner

Groh

Vremec

et al. 2021

Hydrol. Earth Syst. Sci.

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Abstract. Effects of climate change on the ecosystem productivity and water fluxes have been studied in various types of experiments. However, it is still largely unknown whether and how the experimental approach itself affects the results of such studies. We employed two contrasting experimental approaches, using high-precision weighable monolithic lysimeters, over a period of 4 years to identify and compare the responses of water fluxes and aboveground biomass to climate change in permanent grassland. The first, manipulative, approach is based on controlled increases of atmospheric CO2 concentration and surface temperature. The second, observational, approach uses data from a space-for-time substitution along a gradient of climatic conditions. The Budyko framework was used to identify if the soil ecosystem is energy limited or water limited. Elevated temperature reduced the amount of non-rainfall water, particularly during the growing season in both approaches. In energy-limited grassland ecosystems, elevated temperature increased the actual evapotranspiration and decreased aboveground biomass. As a consequence, elevated temperature led to decreasing seepage rates in energy-limited systems. Under water-limited conditions in dry periods, elevated temperature aggravated water stress and, thus, resulted in reduced actual evapotranspiration. The already small seepage rates of the drier soils remained almost unaffected under these conditions compared to soils under wetter conditions. Elevated atmospheric CO2 reduced both actual evapotranspiration and aboveground biomass in the manipulative experiment and, therefore, led to a clear increase and change in seasonality of seepage. As expected, the aboveground biomass productivity and ecosystem efficiency indicators of the water-limited ecosystems were negatively correlated with an increase in aridity, while the trend was unclear for the energy-limited ecosystems. In both experimental approaches, the responses of soil water fluxes and biomass production mainly depend on the ecosystems' status with respect to energy or water limitation. To thoroughly understand the ecosystem response to climate change and be able to identify tipping points, experiments need to embrace sufficiently extreme boundary conditions and explore responses to individual and multiple drivers, such as temperature, CO2 concentration, and precipitation, including non-rainfall water. In this regard, manipulative and observational climate change experiments complement one another and, thus, should be combined in the investigation of climate change effects on grassland.

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Section: Response Of Water Fluxes To Climatic Changesmentioning

confidence: 99%

Response of water fluxes and biomass production to climate change in permanent grassland soil ecosystems

Forstner

Groh

Vremec

et al. 2021

Hydrol. Earth Syst. Sci.

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“…Dew could be used as an alternative source of water during dry season of tropical islands 10 . Dew is beneficial to the survival, growth and development of the plants in arid regions or during droughts, such as bringing nocturnal moisture [11][12][13] and being directly absorbed and utilized by leaves through plant stomata or special physical features (e.g., aerial plants) [14][15][16] . Thus, dew could increase net photosynthate accumulation in leaves 17 and improve plant water use efficiency 16,18 .…”

Section: Background and Summarymentioning

confidence: 99%

Stable isotope variations of dew under three different climates

Tian

Wang

et al. 2022

Sci Data

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As a supplementary or the only water source in dry regions, dew plays a critical role in the survival of organisms. The new hydrological tracer 17O-excess, with almost sole dependence on relative humidity, provides a new way to distinguish the evaporation processes and reconstruct the paleoclimate. Up to now, there is no published daily dew isotope record on δ2H, δ18O, δ17O, d-excess, and 17O-excess. Here, we collected daily dew between July 2014 and April 2018 from three distinct climatic regions (i.e., Gobabeb in the central Namib Desert with desert climate, Nice in France with Mediterranean climate, and Indianapolis in the central United States with humid continental climate). The δ2H, δ18O, and δ17O of dew were simultaneously analyzed using a Triple Water Vapor Isotope Analyzer based on Off-Axis Integrated Cavity Output Spectroscopy technique, and then d-excess and 17O-excess were calculated. This report presents daily dew isotope dataset under three climatic regions. It is useful for researchers to use it as a reference when studying global dew dynamics and dew formation mechanisms.

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“…For this purpose we use two substrates with small and large emissivities while show- ing the same wetting properties. A specially designed experimental setup is used to create a radiative deficit between the substrate and a cold source, under controlled air temperature and humidity [6]. An infra-red camera is used to measure emissivity of the samples in the [7.5-14] µm range, the so-called atmospheric window where atmosphere is nearly transparent to IR radiations [7].…”

Section: Introductionmentioning

confidence: 99%