InScAPE

arcticclouds

Anonymous (anonymous@undisclosed.example.com) — 2024-01-26T18:20:46+00:00

Arctic clouds [Low-level clouds observed on Svalbard] Arctic climate features an abundance of low-level clouds. It is well known from scientific studies in the past that these clouds can significantly affect the radiative energy budget of the atmosphere and at the surface. For these reasons it can be expected that low-level clouds could play an important role in the currently ongoing warming of the Arctic climate, a process also known as Arctic Amplification.

blender

Anonymous (anonymous@undisclosed.example.com) — 2022-09-14T14:16:45+00:00

Blender Where graphic design meets atmospheric science We make use of Blender and its path-tracing engine to realistically render three-dimensional cloud fields from Large-Eddy Simulations (LES). These are not just for show, but can also be used as

cloudfeedbacks

Anonymous (anonymous@undisclosed.example.com) — 2021-09-24T09:25:09+00:00

Cloud feedbacks Cloud climate feedbacks Figure 3. The change in cloud fraction (left) and cloud liquid condensate (right) between the future climate (AMIP4K) and present-day climate (AMIP) at the Barbados Cloud Observatory (BCO), for the dry season. The EC-EARTH GCM simulations for the CFMIP5 project are shown in blue, while its SCM forced with cfSites data is shown in red. The solid line is the 30-year average value and the shadowed region displays the variability between monthly samples, c…

cloudscheme

Anonymous (anonymous@undisclosed.example.com) — 2022-09-14T14:24:44+00:00

PDF cloud scheme Our research into cloud schemes focuses on how to represent clouds and cloud processes in numerical models which do not have sufficient resolution to resolve clouds. As both weather forecast or climate models fall into this category this research has high societal and academic relevance.

edmf

Anonymous (anonymous@undisclosed.example.com) — 2022-09-14T15:47:32+00:00

EDMF The basics Figure 1. Visualization of the EDMF approach in parameterizing the vertical transport by turbulence and convection in the atmosphere. Large-scale circulation models used for Numerical Weather Prediction (NWP) and climate simulation are formulated in terms of budget equations for a set of conserved state variables $\phi$\begin{eqnarray*} \frac{D \phi}{D t} = S_{\phi} \end{eqnarray*}$S_{\phi}$$\phi$\begin{eqnarray*} S_{\phi,tc} = - \frac{\partial \overline{w'\phi'}}{\partial …

greyzone

Anonymous (anonymous@undisclosed.example.com) — 2021-09-24T12:23:26+00:00

Convective Grey Zone Figure 1. Visualization of the grey zone in turbulent transport in a subtropical marine shallow cumulus topped boundary layer. Shown is the ratio of the subgrid flux to the total flux as a function of horizontal resolution of a series of LES simulations of the RICO shallow cumulus case, featuring a scale-adaptive version of the EDMF scheme. The intermediate values reflect the range of resolutions at which the resolved contribution is as large as the subgrid contribution, …

information

Anonymous (anonymous@undisclosed.example.com) — 2024-01-23T13:29:24+00:00

Who we are We are a research group within the Institute of Geophysics and Meteorology of the University of Cologne. You can find more information about the institute on the official website. More information about the people in our group can be found staff overview. [ group photo] Address

models

Anonymous (anonymous@undisclosed.example.com) — 2023-07-12T16:00:31+00:00

Models Our group use a wide range of numerical models of atmosphere, from regional models to large eddy simulations and single column models. DALES The Dutch Atmospheric Large-Eddy Simulation (DALES) model is one of the two large eddy simulations (LES) codes employed at InScAPE. A library of prototype cases is used for research and for further code development, including convective cases as well as cases of stratiform clouds. Many of these have been developed within the context of internatio…

narvalsimulations

Anonymous (anonymous@undisclosed.example.com) — 2022-09-14T15:55:53+00:00

Simulations for meteorological field campaigns NARVAL I and II The first Next-generation Aircraft Remote sensing for VAlidation Studies (NARVAL I) Campaign took place in December 2013 and January 2014. It was divided into NARVAL South, in Barbados, and NARVAL North, in Iceland, respectively. $^3$

population

Anonymous (anonymous@undisclosed.example.com) — 2022-09-14T15:36:05+00:00

Cloud Population Dynamics BiOMi (Binomials on Microgrids) Neggers and Griewank (2021) The spatial patterns in cumulus cloud populations are a key factor in understanding cloud-climate feedback and cloud-circulation coupling. BiOMi (Binomial Objects on Microgrids) is a toy model developed to recreate populations of interacting convective objects distributed over a two-dimensional Eulerian grid.

projects

Anonymous (anonymous@undisclosed.example.com) — 2021-09-24T12:47:27+00:00

Research projects The InScAPE research group has been or is currently involved in the following research projects: * (AC)3 ; * ASR : * DFG : ORCA2: * DFG : POPC4OM, * DFG : SOCLES, * DFG : SPP HALO: * ET-CC :

publications

Anonymous (anonymous@undisclosed.example.com) — 2026-04-01T07:43:32+00:00

Publications 2026 Paulus, F. M., Müller, J. J., Kirbus, B., Sodemann, H., van Gelder, L., Walbröl, A., Wendisch, M., and Neggers, R. A. J.: Impacts of mesoscale atmospheric subsidence on cloud glaciation and decoupling in Arctic marine cold air outbreaks.

sidebar

Anonymous (anonymous@undisclosed.example.com) — 2021-04-27T16:38:16+00:00

General * Introduction * Who we are * Research projects * Publications * Student projects * Open positions Research * Arctic Clouds * Blender * Cloud Geometry * Cloud Feedbacks * Cloud Schemes * EDMF * Field Campaigns * Grey Zone * Population Dynamics Tools * Models * Testbed Code * Binomial sampling Internal

sizedistribution

Anonymous (anonymous@undisclosed.example.com) — 2022-09-14T14:42:35+00:00

Cloud geometry The earth´s radiation budget is heavily influenced by the variability in cloud cover . In addition, individual clouds (in particular cumulus) can be very irregular, associated with inefficient vertical overlap. It is therefore essential to understand the geometry and spatial structure of shallow cumulus (Scu) cloud fields to be able to simulate the radiative fluxes adequately. Reliable cloud population information in terms of size is also necessary for the scale-aware parameteriz…

start

Anonymous (anonymous@undisclosed.example.com) — 2024-01-23T13:13:50+00:00

An introduction to InScAPE [Ray tracing volume rendering of simulated cumulus clouds at the JOYCE site on 24 June 2014] The research group for Integrated Scale-Adaptive Parameterization and Evaluation (InScAPE) of Prof. Roel Neggers aims to develop scale-adaptive parameterizations of small-scale turbulent/convective processes and clouds for larger-scale models, and to constrain those with relevant measurements as obtained from permanent meteorological

students

Anonymous (anonymous@undisclosed.example.com) — 2024-05-21T12:13:06+00:00

Student projects A year in LES (AYIL): Large eddy simulation of the complete MOSAiC drift From September 2019 to October 2020 the Polarstern Research Vessel drifted with the sea ice through the central Arctic, as part of the MOSAiC field campaign. Based on the observational data collected on the ship and by the instrumentation on the sea ice (MetCity), we performed daily Large-Eddy Simulations (LES) of the atmospheric domain surrounding the ship. The spatial and temporal resolutions were high …

testbed

Anonymous (anonymous@undisclosed.example.com) — 2021-01-22T21:21:34+00:00

InScAPE Parameterization Testbed Science objectives A parameterization testbed is an environment where model and observational datastreams come together and can easily be inter-compared. The aim is to facilitate the parameterization evaluation and development process, by confronting models with data in a structural and informed manner. While such evaluation can give confidence in the realism of a model simulation, on the other hand the models can help to gain insight into processes as they act…

vacancies

Anonymous (anonymous@undisclosed.example.com) — 2024-02-21T21:06:48+00:00

Open positions in our research group Currently there are no open positions. For student projects, please refer to Student projects ---------- Past calls 🌨 Are you interested in the Arctic and meteorology? DFG-funded Collaborative Research Centre on Arctic Amplification (