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Wolf Hendrik Huwald

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Publications associées (39)

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Estimation of wet surface evaporation from sensible heat flux measurements

Marc Parlange, Wolf Hendrik Huwald, Nikki Vercauteren

A new method is proposed to estimate wet surface evaporation by means of measurements of sensible heat flux and of air temperature, relative humidity, and wind speed at one level only. This formulation is made possible by the linearization of the Bowen rat ...

American Geophysical Union2009

Stream temperature and discharge evolution in Switzerland over the last 50 years: annual and seasonal behaviour

Michael Lehning, Bettina Schaefli, Wolf Hendrik Huwald, Adrien Michel, Tristan Jonas Brauchli

Stream temperature and discharge are key hydro- logical variables for ecosystem and water resource management and are particularly sensitive to climate warming. Despite the wealth of meteorological and hydrological data, few studies have quantified observe ...

2020

Evidence of Strong Flux Underestimation by Bulk Parametrizations During Drifting and Blowing Snow

Michael Lehning, Wolf Hendrik Huwald, Varun Sharma, Jérôme François Sylvain Dujardin, Francesco Comola, Armin Sigmund, Daniela Brito Melo

The influence of drifting and blowing snow on surface mass and energy exchange is difficult to quantify due to limitations in both measurements and models, but is still potentially very important over large areas with seasonal or perennial snow cover. We p ...

SPRINGER2023

Albedo effect on radiative errors in air temperature measurements

Michael Lehning, Marc Parlange, Wolf Hendrik Huwald, Chad Higgins, Marc-Olivier Boldi

Most standard air temperature measurements are subject to significant errors mainly due to sensor heating by solar radiation, even when the measurement principle is accurate and precise. We present various air temperature measurements together with other m ...

American Geophysical Union2009

Banner Cloud Formation at the Matterhorn: Measurements versus Large-Eddy Simulations

Michael Lehning, Wolf Hendrik Huwald, Brandon Jacobus Adrianus Van Schaik

Banner clouds are clouds in the lee of steep mountains or sharp ridges on otherwise cloud-free days. Previous studies identified key mechanisms and preferred flow conditions on the basis of idealized Large-Eddy Simulations, but it remained unclear to what ...

American Meteorological Society2025

StreamFlow 1.0: an extension to the spatially distributed snow model Alpine3D for hydrological modelling and deterministic stream temperature prediction

Michael Lehning, Wolf Hendrik Huwald, Francesco Comola, Aurélien Gallice, Tristan Jonas Brauchli

Climate change is expected to strongly impact the hydrological and thermal regimes of Alpine rivers within the coming decades. In this context, the development of hydrological models accounting for the specific dynamics of Alpine catchments appears as one ...

Copernicus Gesellschaft Mbh2016

Dataset for: Climate change scenarios at hourly time-step over Switzerland from an enhanced temporal downscaling approach

Varun Sharma, Michael Lehning, Wolf Hendrik Huwald, Adrien Michel

In fall 2019, a new set of climate change scenarios has been released for Switzerland, the CH2018 dataset (www.climate-scenarios.ch). The data areprovided at daily resolution. We produced from the CH2018 dataset a new set of climate change scenarios tempor ...

2021

Evidence of Strong Flux Underestimation by Bulk Parametrizations During Drifting and Blowing Snow

Michael Lehning, Wolf Hendrik Huwald, Varun Sharma, Jérôme François Sylvain Dujardin, Francesco Comola, Armin Sigmund, Daniela Brito Melo

2022

Meteorology and snow transport at S17 near Syowa, Antarctica, in austral summer 2018/2019

Michael Lehning, Wolf Hendrik Huwald, Francesco Comola, Varun Sharma, Jérôme François Sylvain Dujardin, Armin Sigmund, Daniela Brito Melo

This dataset contains measurement and simulation data. The measurements characterize the standard meteorology, turbulence, and snow transport at the S17 site near Syowa Station in East Antarctica during an expedition in austral summer 2018/2019. Large-eddy ...

2021

Climate change scenarios at hourly time‐step over Switzerland from an enhanced temporal downscaling approach

Michael Lehning, Wolf Hendrik Huwald, Varun Sharma, Adrien Michel

Many physically‐based models for climate change impact studies require sub‐daily temporal resolution of the forcing data to provide meaningful predictions. However, climate scenarios are typically available at daily time step, severely limiting the applica ...

2021

The MatterHEX Experiment – Investigating Atmospheric Flow Patterns in Highly Complex Terrain Related to Banner Cloud Formation

Michael Lehning, Wolf Hendrik Huwald, Brandon Jacobus Adrianus Van Schaik

Orographic clouds typically form on the windward side of a topographic barrier when approaching air is cooled as it is lifted, and moisture condenses into cloud droplets. Under special conditions, however, clouds can appear on the leeward side of a mountai ...

American Meteorological Society2025

Influence of air flow features on alpine wind energy potential

Michael Lehning, Wolf Hendrik Huwald, Jérôme François Sylvain Dujardin, Franziska Gerber, Fanny Kristianti

Wind energy is one of the potential options to fill the gap in renewable energy production in Switzerland during the winter season when the energy demand exceeds local production capacities. With likely further rising energy consumption in the future, the ...

Frontiers Media Sa2024

Dataset for: Future water temperature of rivers in Switzerland under climate change investigated with physics-based models

Michael Lehning, Bettina Schaefli, Wolf Hendrik Huwald, Nander Wever, Adrien Michel

This work presents the first extensive study of climate change impacts on rivers temperature in Switzerland. Results show that even for low emissions scenarios, water temperature increase will lead to adverse effect for both ecosystems and socioeconomic se ...

Zenodo2022

Fiber optic distributed temperature sensing for the determination of the nocturnal atmospheric boundary layer height

Marc Parlange, Wolf Hendrik Huwald

A new method for measuring air temperature profiles in the atmospheric boundary layer at high spatial and temporal resolution is presented. The measurements are based on Raman scattering distributed temperature sensing (DTS) with a fiber optic cable attach ...

2011

How do Stability Corrections Perform in the Stable Boundary Layer Over Snow?

Michael Lehning, Wolf Hendrik Huwald, Sebastian Schlögl

We assess sensible heat-flux parametrizations in stable conditions over snow surfaces by testing and developing stability correction functions for two alpine and two polar test sites. Five turbulence datasets are analyzed with respect to, (a) the validity ...

2017

Extracting High Resolution Snow Distribution Information with Inexpensive Autonomous Cameras

Wolf Hendrik Huwald, Steven Vincent Weijs

This study details a procedure to derive high resolution snow cover information using low-cost autonomous cameras. Images from time lapse photography of target areas are used to obtain temporally resolved binary snow-covered area information. Various image ...

EasyChair2018

A multilayer sigma-coordinate thermodynamic sea ice model: Validation against Surface Heat Budget of the Arctic Ocean (SHEBA)/Sea Ice Model Intercomparison Project Part 2 (SIMIP2) data

Wolf Hendrik Huwald

American Geophysical Union2005

Reconciling different observational data sets from Surface Heat Budget of the Arctic Ocean (SHEBA) for model validation purposes

Wolf Hendrik Huwald

American Geophysical Union2005

Measuring Sensible Heat Flux with High Spatial Density

Alcherio Martinoli, Marc Parlange, Wolf Hendrik Huwald, Chad Higgins, Alexander Bahr, William Christopher Evans

2012