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Wind Systems and Energy Balance in the Dead Sea Valley

Author : Metzger, Jutta

Publisher : KIT Scientific Publishing

Page : 236 pages

File Size : 45,17 MB

Release : 2017-10-17

Category : Physics

ISBN : 3731506998

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Book Description

A new measurement concept was developed to determine the amount, variability and governing factors of evaporation from the Dead Sea. Additionally, a suitable indirect method to calculate evaporation is presented. Results show that vapour pressure deficit and wind speed are governing evaporation and that the diurnal cycle is determined by three distinct diurnal wind systems. The occurrence frequency and intensity of the wind systems are determined by local differential cooling and heating.



Objective identification and climatology of mesoscale high-wind features within extratropical cyclones

Author : Eisenstein, Lea Andrea

Publisher : KIT Scientific Publishing

Page : 222 pages

File Size : 42,33 MB

Release : 2024-10-01

Category :

ISBN : 3731513749

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Book Description

Strong winds accompanying extratropical cyclones are commonly associated with various mesoscale features. This work introduces RAMEFI (RAndom-forest-based Mesoscale wind Feature Identification), an objective and flexible identification approach based on key surface characteristics to distinguish these features. RAMEFI is further applied to compile a climatology over Europe, offering a comprehensive analysis of feature frequency, distribution, and characteristics.



Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes

Author : Wandel, Jan Lucas

Publisher : KIT Scientific Publishing

Page : 256 pages

File Size : 41,26 MB

Release : 2023-05-25

Category : Science

ISBN : 3731512491

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Book Description

This study systematically investigates the representation of warm conveyor belts (WCBs) in large reforecast data sets of different numerical weather prediction models and evaluates the role of WCBs for the onset and life cycle of Atlantic-European weather regimes. The results emphasize the importance of accurate forecast of WCBs for sub-seasonal prediction on time scales beyond two weeks and tie the low forecast skill of blocked weather regimes over Europe to misrepresented WCBs.



Convective precipitation simulated with ICON over heterogeneous surfaces in dependence on model and land-surface resolution

Author : Singh, Shweta

Publisher : KIT Scientific Publishing

Page : 198 pages

File Size : 48,56 MB

Release : 2021-08-16

Category : Science

ISBN : 3731510685

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Book Description

The impact of land-surface properties like vegetation, soil type, soil moisture, and the orography on the atmosphere is manifold. These features determine the evolution of the atmospheric boundary layer, convective conditions, cloud evolution and precipitation. The impact of model grid spacing and land-surface resolution on convective precipitation over heterogeneous surfaces is investigated using ICOsahedral Nonhydrostatic (ICON) simulations within the framework of the HD(CP)2 project.



Perspectives on warm conveyor belts - sensitivities to ensemble configuration and the role for forecast error

Author : Pickl, Moritz

Publisher : KIT Scientific Publishing

Page : 250 pages

File Size : 38,7 MB

Release : 2023-03-30

Category : Science

ISBN : 373151236X

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Book Description

Warm conveyor belts (WCBs) are weather systems that substantially modulate the large-scale extratropical circulation. As they can amplify forecast errors and project them onto the Rossby wave pattern, they are of high relevance for numerical weather prediction. This work elaborates on two aspects of WCBs in the context of ensemble forecasts: (1) sensitivities of WCBs to the representation of initial condition and model uncertainties, and (2) the role of WCBs for forecast error growth.



Assessing the Aerosol Impact on Southern West African Clouds and Atmospheric Dynamics

Author : Deetz, Konrad

Publisher : KIT Scientific Publishing

Page : 344 pages

File Size : 12,20 MB

Release : 2018-01-30

Category : Physics

ISBN : 3731507447

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Book Description

By using COSMO-ART, highly resolved process study simulations for 2-3 July 2016 are conducted to assess the aerosol effect on the meteorological conditions of southern West Africa. The meteorological phenomenon Evening Monsoon Flow Enhancement (EMFE) is identified as highly susceptible to the aerosol direct effect, leading to a spatial shift of the EMFE front. In a second aerosol feedback chain the aerosol variation leads to a temporal shift of the stratus-to-cumulus transition.





Contrails and Climate Engineering - Process Studies on Natural and Artificial High-Level Clouds and Their Impact on the Radiative Fluxes

Author : Gruber, Simon

Publisher : KIT Scientific Publishing

Page : 282 pages

File Size : 28,70 MB

Release : 2019-03-22

Category : Physics

ISBN : 3731508966

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Book Description

Two aspects of anthropogenic impacts on the atmosphere are investigated using means of numerical weather prediction. A case study is conducted to estimate the impact of such artificial clouds on the incoming solar radiation at the Earth's surface with special regard to photovoltaic power production. Furthermore, simulations are performed to assess the efficacy of injecting particles into the Arctic troposphere with the aim of modifying cirrus clouds for counteracting global warming.





Wind Systems in the Dead Sea and Footprints in Seismic Records

Author : Lott, Friederike Franziska

Publisher : KIT Scientific Publishing

Page : 270 pages

File Size : 10,59 MB

Release : 2017-02-22

Category : Physics

ISBN : 3731505967

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Book Description

Atmospheric processes, such as wind, impact the ground motion of the earth and have the potential to induce strong broad-band noise in seismological records. In order to quantify the influence of wind on ground motion velocity joint seismological and meteorological measurements were conducted at the Dead Sea.Results reveal a pronounced impact of wind on seismological records. A methodology is presented to account for the dependency of PSD of ground motion velocity on the horizontal wind field.