The Land-Atmosphere Feedback Observatory: A New Observational Approach for Characterizing Land-Atmosphere Feedback

Späth, Florian; Rajtschan, Verena; Weber, Tobias K. D.; Morandage, Shehan; Lange, Diego; Abbas, Syed Saqlain; Behrendt, Andreas; Ingwersen, Joachim; Streck, Thilo; Wulfmeyer, Volker

doi:10.5194/gi-2022-9

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…Currently, there is a lack of data to properly account for the possible impacts of climate change and land use on SHPs. To fill this gap, long-term field trials (e.g., Schmidt et al, 2019) and observatories (Späth et al, 2022) need to be maintained and/or established to allow for a systematic evaluation of the impact of climatic and anthropogenic changes on SHPs.…”

Section: Transient Ptfs: Accounting For Time-dependency Of Shpsmentioning

confidence: 99%

Hydro-pedotransfer functions: A roadmap for future development

Weber

2023

Preprint

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<p>Hydro-pedotransfer functions (hyPTF) are important methods to relate available knowledge about soil properties to soil hydraulic properties and model parameters to be applied in process models. At least more than four decades have been invested to derive such relationships. However, while models, methods, data storage capacity, and computational efficiency have advanced, there are fundamental issues related to the scope and adequacy of current hyPTFs, particularly when applied to parameterise models at the field scale and beyond. Much of the hyPTF development process has focussed on refining and advancing the methods, while fundamental questions remain largely unanswered, namely i) how should hyPTFs be built for maximum prediction confidence, ii) which processes/properties need to be predicted to move beyond the van Genuchten-Mualem based parameterisation of the Richards equation, iii) which new datasets and data coverage are needed, iv) how does the measurement process of soil hydraulic properties determine the construction of hyPTFs and at which scale, iv) how can we incorporate diverging scales (scale of derivation vs scale of application), and v) what scaling/modulation/constraining strategies are affective to make hyPTF predictions at field-to-regional scale appropriate and physically meaningful? These questions have been addressed in a joint effort by the members of the International Soil Modelling Consortium (ISMC) Pedotransfer Functions Working Group with the aim to systematise hyPTF research and provide a roadmap guiding scientists, reviewers, and make users aware of the shortcomings.</p>

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Section: Transient Ptfs: Accounting For Time-dependency Of Shpsmentioning

confidence: 99%

Hydro-pedotransfer functions: A roadmap for future development

Weber

2023

Preprint

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“…The LAFO 1 [Land-Atmosphere Feedback Observatory; Späth et al, 2022], located at the University of Hohenheim at the northern border of the study area (Figure 1), is equipped to investigate interactions and vertical exchanges between the compartments atmosphere and land-surface, including vegetation and soil. Two Doppler lidars [Streamline XR from Halo Photonics; Pearson et al, 2009] and one Doppler cloud radar from Metek GmbH (Görsdorf et al, 2015) operated during the entire EOP.…”

Section: Land-atmosphere Feedback Observatorymentioning

confidence: 99%

Swabian MOSES 2021: An interdisciplinary field campaign for investigating convective storms and their event chains

et al. 2022

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The Neckar Valley and the Swabian Jura in southwest Germany comprise a hotspot for severe convective storms, causing tens of millions of euros in damage each year. Possible reasons for the high frequency of thunderstorms and the associated event chain across compartments were investigated in detail during the hydro-meteorological field campaign Swabian MOSES carried out between May and September 2021. Researchers from various disciplines established more than 25 temporary ground-based stations equipped with state-of-the-art in situ and remote sensing observation systems, such as lidars, dual-polarization X- and C-band Doppler weather radars, radiosondes including stratospheric balloons, an aerosol cloud chamber, masts to measure vertical fluxes, autosamplers for water probes in rivers, and networks of disdrometers, soil moisture, and hail sensors. These fixed-site observations were supplemented by mobile observation systems, such as a research aircraft with scanning Doppler lidar, a cosmic ray neutron sensing rover, and a storm chasing team launching swarmsondes in the vicinity of hailstorms. Seven Intensive Observation Periods (IOPs) were conducted on a total of 21 operating days. An exceptionally high number of convective events, including both unorganized and organized thunderstorms such as multicells or supercells, occurred during the study period. This paper gives an overview of the Swabian MOSES (Modular Observation Solutions for Earth Systems) field campaign, briefly describes the observation strategy, and presents observational highlights for two IOPs.

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The land–atmosphere feedback observatory: a new observational approach for characterizing land–atmosphere feedback

Späth

Rajtschan

Weber

et al. 2023

Geosci. Instrum. Method. Data Syst.

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Abstract. Important topics in land–atmosphere (L–A) feedback research are water and energy balances and heterogeneities of fluxes at the land surface and in the atmospheric boundary layer (ABL). To target these questions, the Land–Atmosphere Feedback Observatory (LAFO) has been installed in southwestern Germany. The instrumentation allows comprehensive and high-resolution measurements from the bedrock to the lower free troposphere. Grouped into three components, atmosphere, soil and land surface, and vegetation, the LAFO observation strategy aims for simultaneous measurements in all three compartments. For this purpose the LAFO sensor synergy contains lidar systems to measure the atmospheric key variables of humidity, temperature and wind. At the land surface, eddy covariance stations are operated to record the energy distribution of radiation, sensible, latent and ground heat fluxes. Together with a water and temperature sensor network, the soil water content and temperature are monitored in the agricultural investigation area. As for vegetation, crop height, leaf area index and phenological growth stage values are registered. The observations in LAFO are organized into operational measurements and intensive observation periods (IOPs). Operational measurements aim for long time series datasets to investigate statistics, and we present as an example the correlation between mixing layer height and surface fluxes. The potential of IOPs is demonstrated with a 24 h case study using dynamic and thermodynamic profiles with lidar and a surface layer observation that uses the scanning differential absorption lidar to relate atmospheric humidity patterns to soil water structures. Both IOPs and long-term observations will provide new insight into exchange processes and their statistics for improving the representation of L–A feedbacks in climate and numerical weather prediction models. The lidar component in particular will support the investigation of coupling to the atmosphere.

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The Land-Atmosphere Feedback Observatory: A New Observational Approach for Characterizing Land-Atmosphere Feedback

Cited by 3 publications

References 33 publications

Hydro-pedotransfer functions: A roadmap for future development

Hydro-pedotransfer functions: A roadmap for future development

Swabian MOSES 2021: An interdisciplinary field campaign for investigating convective storms and their event chains

The land–atmosphere feedback observatory: a new observational approach for characterizing land–atmosphere feedback

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