Cloud Botany: Shallow Cumulus Clouds in an Ensemble of Idealized Large-Domain Large-Eddy Simulations of the Trades

Small shallow cumulus clouds (less-than 1 km) over the tropical oceans appear to possess the ability to self-organize into mesoscale (10–100 km) patterns. To better understand the processes leading to such self-organized convection, we present Cloud Botany, an ensemble of 103 large-eddy simulations on domains of 150 km, produced by the Dutch...

Assessing uncertainties from physical parameters and modelling choices in an atmospheric large eddy simulation model

In this study, we investigate uncertainties in a large eddy simulation of the atmosphere, employing modern uncertainty quantification methods that have hardly been used yet in this context. When analysing the uncertainty of model results, one can distinguish between uncertainty related to physical parameters whose values are not exactly known...

Response of hourly precipitation extremes to temperature and moisture perturbations: Results from a mesoscale model

Extreme precipitation response to climate perturbations in an atmospheric mesoscale model

Observations of extreme (sub) hourly precipitation at midlatitudes show a large dependency on the dew point temperature often close to 14% per degree—2 times the dependency of the specific humidity on dew point temperature which is given by the Clausius–Clapeyron (CC) relation. By simulating a selection of 11 cases over the Netherlands...

Ice induced vibrations of multi leg offshore structures

Usability problem reports for comparative studies: Consistency and inspectability

This study explores issues of consistency and inspectability in usability test data analysis processes and reports. Problem reports resulting from usability tests performed by three professional usability labs in three different countries are compared. Each of the labs conducted a usability test on the same product, applying a test protocol that...

Gebruikers over hun kantooromgeving: Cross-case analyse van acht projecten

In dit rapport zijn op basis van data uit acht door het CfPB geëvalueerde projecten ondergrenzen en bovengrenzen opgespoord in percentages (on)tevreden medewerkers, per thema en per item. Ook is gekeken naar gemiddelde percentages over alle acht projecten. Tevens is gezocht naar verklaringen voor overeenkomsten en verschillen in (on)tevredenheid...

Use of a SAR in agriculture and forestry

Under contract with ESA (nr. 5777/83/NL/MS) a study on the use of a SAR for agriculture and forestry was performed by the National Aerospace Laboratory NLR together with the Physics Laboratory TNO and the Microwave Laboratory of the Delft University of Technology. In the first part of this study the present state-of-the- art with respect to...