Atmospheric Aridity and Apparent Soil Moisture Drought in European Forest During Heat Waves

Lansu, Eva; Heerwaarden, Chiel C. van; Stegehuis, Annemiek I.; Teuling, Adriaan J.

doi:10.1029/2020gl087091

Cited by 59 publications

(34 citation statements)

References 39 publications

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“…This drying occurs despite the potential suppressing effect of stomatal closure at higher VPD (Massmann et al, 2019; Medlyn et al, 2011). This result is consistent with previous findings that transpiration increases with VPD in many species, even if stomatal resistance increases (Cunningham, 2004; Lansu et al, 2020; Monteith, 1995; Mott & Parkhurst, 1991; Teuling et al, 2010; Urban et al, 2017). Additionally, greater soil temperatures are associated with higher conductance and transpiration (Cochard et al, 2000).…”

Section: Resultssupporting

confidence: 93%

Land‐Atmosphere Drivers of Landscape‐Scale Plant Water Content Loss

Feldman

Gianotti

Trigo

et al. 2020

Geophysical Research Letters

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Plant water content observations using microwave remote sensing measurements allow monitoring of landscape-scale plant water stress. During soil drying following rainfall events, we use a Granger causality framework to quantify the degree to which environmental factors drive satellite-based plant water content loss across Africa's diverse biomes. After soil drying into the water-limited regime, satellite observations show that plants dry while solar radiation, vapor pressure deficit, and diurnal temperature amplitude increase. We find that soil drying primarily drives plant water content loss across African drylands, though with regional effects of diurnal temperature amplitude increases (found to indicate vapor pressure deficit increases here). We also detect interactions between these factors that reinforce plant drying during periods of soil moisture loss. Our results provide observational evidence across Africa that individual and interactive components of surface drying and heating can all drive plant water stress, especially during intermittent post-storm drying periods.

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Section: Resultssupporting

confidence: 93%

Land‐Atmosphere Drivers of Landscape‐Scale Plant Water Content Loss

Feldman

Gianotti

Trigo

et al. 2020

Geophysical Research Letters

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“…Though urban forests can provide enhanced cooling benefits (e.g. Gunawardena et al , 2017), recent studies showed increasing emission of latent heat in grassland rather than forest during drought conditions in Europe (Lansu et al , 2020). While such large-scale findings may not be easily transferable to plot-scale, urban site, isotope tracers in our study revealed higher soil evaporation under urban grassland, though tree transpiration and interception lead to similarly high ET rates over the growing season.…”

Section: Wider Implicationscontrasting

confidence: 77%

Using soil water isotopes to infer the influence of contrasting urban green space on ecohydrological partitioning

Kuhlemann¹,

Tetzlaff²,

Smith³

et al. 2020

Preprint

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Abstract. Many urban areas are facing challenges in balancing domestic and industrial water demands while simultaneously maintaining the water supply for green infrastructure. Consequently, quantitative knowledge about ecohydrological partitioning in different types of urban green space is crucial for balancing sustainable water needs in cities during future challenges of increasing urbanization and climate warming. Using isotopic tracers in precipitation and soil water, along with conventional hydrometric measurements in a plot-scale study in Berlin, Germany, we investigated water partitioning under different generic types of urban vegetation (grassland, shrub and trees). This allowed assessment of effects on subsequent evapotranspiration, subsurface flow paths and storage during a prolonged drought period with episodic rainfall. Water losses under forest were slightly higher than grassland over the monitoring in the growing season of 2019. Despite higher soil evaporation losses under urban grassland, higher interception and transpiration likely contributed to slower turnover of soil water and older groundwater recharge under urban trees. Shrub vegetation seemed to be most resilient to prolonged drought periods, with lower evapotranspiration losses. Our results contribute to a better understanding of ecohydrological partitioning under mixed urban vegetation communities and an evidence base for better adaptive management of urban water and irrigation strategies to sustainably meet the water demands of urban green spaces.

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“…This has provided valuable insight into the timing and impact of drought on GPP (Sippel et al, 2018;Stocker et al, 2019). Several studies have shown that spatio-temporal patterns of GPP are correlated with solar-induced chlorophyll fluorescence (SIF), a satellite product which measures the reemission of light by chloroplasts during photosynthesis (Frankenberg et al, 2011;Koren et al, 2018;Li et al, 2018). Badgley et al (2017Badgley et al ( , 2019 found that SIF correlates strongly with satellite-obtained near-infrared reflectance of terrestrial vegetation (NIRv) and proposes to use this as a proxy for GPP.…”

Section: Introductionmentioning

confidence: 99%

Anatomy of the 2018 agricultural drought in the Netherlands using in situ soil moisture and satellite vegetation indices

Buitink

Swank

Ploeg

et al. 2020

Hydrol. Earth Syst. Sci.

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Abstract. The soil moisture status near the land surface is a key determinant of vegetation productivity. The critical soil moisture content determines the transition from an energy-limited to a water-limited evapotranspiration regime. This study quantifies the critical soil moisture content by comparison of in situ soil moisture profile measurements of the Raam and Twente networks in the Netherlands, with two satellite-derived vegetation indices (near-infrared reflectance of terrestrial vegetation, NIRv, and vegetation optical depth, VOD) during the 2018 summer drought. The critical soil moisture content is obtained through a piece-wise linear correlation of the NIRv and VOD anomalies with soil moisture on different depths of the profile. This non-linear relation reflects the observation that negative soil moisture anomalies develop weeks before the first reduction in vegetation indices: 2–3 weeks in this case. Furthermore, the inferred critical soil moisture content was found to increase with observation depth, and this relationship is shown to be linear and distinctive per area, reflecting the tendency of roots to take up water from deeper layers when drought progresses. The relations of non-stressed towards water-stressed vegetation conditions on distinct depths are derived using remote sensing, enabling the parameterization of reduced evapotranspiration and its effect on gross primary productivity in models to study the impact of a drought on the carbon cycle.

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Atmospheric Aridity and Apparent Soil Moisture Drought in European Forest During Heat Waves

Cited by 59 publications

References 39 publications

Land‐Atmosphere Drivers of Landscape‐Scale Plant Water Content Loss

Land‐Atmosphere Drivers of Landscape‐Scale Plant Water Content Loss

Using soil water isotopes to infer the influence of contrasting urban green space on ecohydrological partitioning

Anatomy of the 2018 agricultural drought in the Netherlands using in situ soil moisture and satellite vegetation indices

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