› › Quantification Of The Downstream Impact Of Extratropical Transition For Typhoon Jangmi And Other Case Studies

Quantification of the Downstream Impact of Extratropical Transition for Typhoon Jangmi and Other Case Studies

Author : Grams, Christian Michael Warnfrid

Publisher : KIT Scientific Publishing

Page : 366 pages

File Size : 13,41 MB

Release : 2015-03-30

Category : Physics

ISBN : 3866447760

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Book Description

The impact of extratropical transition on the midlatitude flow is quantified based on potential vorticity inversion. The detailed study of Typhoon Jangmi (2008) reveals the diabatically enhanced net transport of low-PV air to the tropopause as the key physical process determining the direct impact of ET. Relocation experiments and further case studies show the crucial role of the relative position of the TC and the midlatitude flow for the downstream impact of ET and the reduced predictability.



Diagnosing the Downstream Impact of Extratropical Transition Using Multimodel Operational Ensemble Prediction Systems

Author : Julia Henriette Keller

Publisher : KIT Scientific Publishing

Page : 272 pages

File Size : 30,92 MB

Release : 2014-10-16

Category : Science

ISBN : 3866449844

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Book Description

The study examines the predictability during the extratropical transition (ET) of tropical cyclones using the THORPEX Interactive Grand Global Ensemble (TIGGE), a multimodel ensemble prediction system (EPS). It is shown that TIGGE exhibits more possible development scenarios than a single EPS. By analysing the eddy kinetic energy budget of forecast scenarios for two ET cases, extracted from an EPS, the impact of the transitioning tropical cyclones on the midlatitude flow is studied in detail.



Separating the Aerosol Effect in Case of a "Medicane"

Author : Kraut, Isabel

Publisher : KIT Scientific Publishing

Page : 196 pages

File Size : 11,54 MB

Release : 2015-08-06

Category : Physics

ISBN : 3731504057

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Book Description

This work addresses the interactions of aerosols, clouds and dynamics in case of a so-called Medicane. This type of cyclone occurs over the Mediterranean Sea, showing similarities to Hurricanes over the Atlantic and Pacific Ocean. Due to the high wind speed of the Medicane, a large amount of sea salt particles is emitted over the sea. This can influence the development of the Medicane, its associated clouds, and precipitation.



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 : 41,11 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.



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 : 28,12 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.



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

Author : Deetz, Konrad

Publisher : KIT Scientific Publishing

Page : 344 pages

File Size : 50,52 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.



Wind Systems in the Dead Sea and Footprints in Seismic Records

Author : Lott, Friederike Franziska

Publisher : KIT Scientific Publishing

Page : 270 pages

File Size : 21,10 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.





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 : 15,89 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.