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  1. Book ; Online ; Thesis: The impact of Aeolus wind observations in the tropics

    Knippertz, Peter [Akademischer Betreuer] / Weissmann, Martin [Akademischer Betreuer]

    2024  

    Author's details Peter Knippertz, Martin Weissmann
    Keywords Geowissenschaften ; Earth Sciences
    Subject code sg550
    Language English
    Publisher KIT-Bibliothek
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  2. Book ; Online ; Thesis: Statistical forecasting of synoptic-scale rainfall in tropical Africa

    Rasheeda Satheesh, Athul [Verfasser] / Knippertz, Peter [Akademischer Betreuer] / Fink, Andreas H. [Akademischer Betreuer]

    2024  

    Author's details Athul Rasheeda Satheesh ; Peter Knippertz, Andreas H. Fink
    Keywords Geowissenschaften ; Earth Sciences
    Subject code sg550
    Language English
    Publisher KIT-Bibliothek
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Book ; Online ; Thesis: Understanding low-level clouds in western Equatorial Africa during the long dry season

    Aellig, Raffael [Verfasser] / Fink, Andreas H. [Akademischer Betreuer] / Knippertz, Peter [Akademischer Betreuer]

    2024  

    Author's details Raffael Aellig ; Andreas H. Fink, Peter Knippertz
    Keywords Geowissenschaften ; Earth Sciences
    Subject code sg550
    Language English
    Publisher KIT-Bibliothek
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Book: Mineral dust

    Knippertz, Peter

    a key player in the earth system

    2014  

    Author's details Peter Knippertz ... ed
    Keywords Geography ; Geology ; Physical geography
    Language English
    Size XXV, 509 S., Ill., graph. Darst.
    Publisher Springer
    Publishing place Dordrecht u.a.
    Document type Book
    ISBN 9789401789776 ; 9401789770
    Database Former special subject collection: coastal and deep sea fishing

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    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Resolving Sahelian thunderstorms improves mid-latitude weather forecasts.

    Pante, Gregor / Knippertz, Peter

    Nature communications

    2019  Volume 10, Issue 1, Page(s) 3487

    Abstract: The summertime West African Sahel has the worldwide highest degree of thunderstorm organisation into long-lived, several hundred-kilometre elongated, fast propagating systems that contribute 90% to the annual rainfall. All current global weather ... ...

    Abstract The summertime West African Sahel has the worldwide highest degree of thunderstorm organisation into long-lived, several hundred-kilometre elongated, fast propagating systems that contribute 90% to the annual rainfall. All current global weather prediction and climate models represent thunderstorms using simplified parameterisation schemes which deteriorates the modelled distribution of rainfall from individual storms and the entire West African monsoon circulation. It is unclear how this misrepresentation of Sahelian convection affects forecasts globally. Our study is the first to demonstrate how a computationally feasible increase of model resolution over West Africa - allowing to avoid convection parameterisation - yields a better representation of organised convection in the Sahel and of moisture within the monsoon system, ultimately improving 5-8-day tropical and mid-latitude weather forecasts. We advocate an operational use of a modelling strategy similar to the one presented here for a cost-effective improvement of global weather prediction and potentially even (sub-)seasonal and climate simulations.
    Language English
    Publishing date 2019-08-02
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-019-11081-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  6. Book ; Online: Physics-based vs. data-driven 24-hour probabilistic forecasts of precipitation for northern tropical Africa

    Walz, Eva-Maria / Knippertz, Peter / Fink, Andreas H. / Köhler, Gregor / Gneiting, Tilmann

    2024  

    Abstract: Numerical weather prediction (NWP) models struggle to skillfully predict tropical precipitation occurrence and amount, calling for alternative approaches. For instance, it has been shown that fairly simple, purely data-driven logistic regression models ... ...

    Abstract Numerical weather prediction (NWP) models struggle to skillfully predict tropical precipitation occurrence and amount, calling for alternative approaches. For instance, it has been shown that fairly simple, purely data-driven logistic regression models for 24-hour precipitation occurrence outperform both climatological and NWP forecasts for the West African summer monsoon. More complex neural network based approaches, however, remain underdeveloped due to the non-Gaussian character of precipitation. In this study, we develop, apply and evaluate a novel two-stage approach, where we train a U-Net convolutional neural network (CNN) model on gridded rainfall data to obtain a deterministic forecast and then apply the recently developed, nonparametric Easy Uncertainty Quantification (EasyUQ) approach to convert it into a probabilistic forecast. We evaluate CNN+EasyUQ for one-day ahead 24-hour accumulated precipitation forecasts over northern tropical Africa for 2011--2019, with the Integrated Multi-satellitE Retrievals for GPM (IMERG) data serving as ground truth. In the most comprehensive assessment to date we compare CNN+EasyUQ to state-of-the-art physics-based and data-driven approaches such as a monthly probabilistic climatology, raw and postprocessed ensemble forecasts from the European Centre for Medium-Range Weather Forecasts (ECMWF), and traditional statistical approaches that use up to 25 predictor variables from IMERG and the ERA5 reanalysis.Generally, statistical approaches perform about en par with post-processed ECMWF ensemble forecasts. The CNN+EasyUQ approach, however, clearly outperforms all competitors for both occurrence and amount. Hybrid methods that merge CNN+EasyUQ and physics-based forecasts show slight further improvement. Thus, the CNN+EasyUQ approach can likely improve operational probabilistic forecasts of rainfall in the tropics, and potentially even beyond.
    Keywords Physics - Atmospheric and Oceanic Physics ; Statistics - Applications
    Subject code 333
    Publishing date 2024-01-08
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    Inter-library loan at ZB MED

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  7. Book ; Online ; Thesis: Statistical methods for probabilistic forecasts of real-valued outcomes

    Walz, Eva-Maria [Verfasser] / Gneiting, Tilmann [Akademischer Betreuer] / Knippertz, Peter [Akademischer Betreuer] / Trabs, Mathias [Akademischer Betreuer]

    2024  

    Author's details Eva-Maria Walz ; Tilmann Gneiting, Peter Knippertz, Mathias Trabs
    Keywords Wirtschaft ; Economics
    Subject code sg330
    Language English
    Publisher KIT-Bibliothek
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

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  8. Book ; Online ; Thesis: Impacts of convective treatment on tropical rainfall variability in realistic and idealized simulations

    Jung, Hyunju [Verfasser] / Knippertz, Peter [Akademischer Betreuer] / Hoose, Corinna [Akademischer Betreuer]

    2023  

    Author's details Hyunju Jung ; Peter Knippertz, Corinna Hoose
    Keywords Geowissenschaften ; Earth Sciences
    Subject code sg550
    Language English
    Publisher KIT-Bibliothek
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  9. Book ; Online ; Thesis: Predictability of rainfall over Equatorial East Africa from daily to sub-monthly time scales using multi-model ensemble forecasts

    Ageet, Simon [Verfasser] / Fink, Andreas H. [Akademischer Betreuer] / Knippertz, Peter [Akademischer Betreuer]

    2023  

    Author's details Simon Ageet ; Andreas H. Fink, Peter Knippertz
    Keywords Geowissenschaften ; Earth Sciences
    Subject code sg550
    Language English
    Publisher KIT-Bibliothek
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  10. Book ; Online ; Thesis: Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes

    Wandel, Jan Lucas [Verfasser] / Grams, Christian M. [Akademischer Betreuer] / Knippertz, Peter [Akademischer Betreuer]

    2023  

    Author's details Jan Lucas Wandel ; Christian M. Grams, Peter Knippertz
    Keywords Geowissenschaften ; Earth Sciences
    Subject code sg550
    Language English
    Publisher KIT Scientific Publishing
    Publishing place Karlsruhe
    Document type Book ; Online ; Thesis
    Database Digital theses on the web

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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