A novel method for objective identification of 3-D potential vorticity anomalies

Publication type:
Journal article
Metadata:
Autoren
  • Christoph Fischer
  • Andreas H Fink
  • Elmar Schoemer
  • Roderick van der Linden
  • Michael Maier-Gerber
  • Marc Rautenhaus
  • Michael Riemer
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000808128500001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.5194/gmd-15-4447-2022
eISSN
1991-9603
Externe Identifier
  • Clarivate Analytics Document Solution ID: 1Y4QY
ISSN
1991-959X
Ausgabe der Veröffentlichung
11
Zeitschrift
GEOSCIENTIFIC MODEL DEVELOPMENT
Datum der Veröffentlichung
2022
Status
Published
Titel
A novel method for objective identification of 3-D potential vorticity anomalies
Sub types
  • Article
Ausgabe der Zeitschrift
15

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:p>Abstract. Potential vorticity (PV) analysis plays a central role in studying atmospheric dynamics and in particular in studying the life cycle of weather systems. The three-dimensional (3-D) structure and temporal evolution of the associated PV features, however, are not yet fully understood. An automated technique to objectively identify 3-D PV features can help to shed light on 3-D atmospheric dynamics in specific case studies as well as facilitate statistical evaluations within climatological studies. Such a technique to identify PV features fully in 3-D, however, does not yet exist. This study presents a novel algorithm for the objective identification of PV anomalies along the dynamical tropopause in gridded data, as commonly output by numerical simulation models. The algorithm is inspired by morphological image processing techniques and can be applied to both two-dimensional (2-D) and 3-D fields on vertically isentropic levels. The method maps input data to a horizontally stereographic projection and relies on an efficient computation of horizontal distances within the projected field. Candidates for PV anomaly features are filtered according to heuristic criteria, and feature description vectors are obtained for further analysis. The generated feature descriptions are well suited for subsequent case studies of 3-D atmospheric dynamics as represented by the underlying numerical simulation. We evaluate our approach by comparison with an existing 2-D technique and demonstrate the full 3-D perspective by means of a case study of an extreme precipitation event that was dynamically linked to a prominent subtropical PV anomaly. The case study demonstrates variations in the 3-D structure of the detected PV anomalies that would not have been captured by a 2-D method. We discuss further advantages of using a 3-D approach, including elimination of temporal inconsistencies in the detected features due to 3-D structural variation and elimination of the need to manually select a specific isentropic level on which the anomalies are assumed to be best captured. These advantages, as well as the suitability of the implementation to process big data sets, also open applications for climatological analyses. The method is made available as open-source for straightforward use by the atmospheric community. </jats:p>
Autoren
  • Christoph Fischer
  • Andreas H Fink
  • Elmar Schömer
  • Roderick van der Linden
  • Michael Maier-Gerber
  • Marc Rautenhaus
  • Michael Riemer
DOI
10.5194/gmd-15-4447-2022
eISSN
1991-9603
Ausgabe der Veröffentlichung
11
Zeitschrift
Geoscientific Model Development
Sprache
en
Online publication date
2022
Paginierung
4447 - 4468
Status
Published online
Herausgeber
Copernicus GmbH
Herausgeber URL
http://dx.doi.org/10.5194/gmd-15-4447-2022
Datum der Datenerfassung
2023
Titel
A novel method for objective identification of 3-D potential vorticity anomalies
Ausgabe der Zeitschrift
15

Data source: Crossref

Author's licence
CC-BY
Autoren
  • Christoph Fischer
  • Andreas H Fink
  • Elmar Schömer
  • Roderick Van der Linden
  • Michael Maier-Gerber
  • Marc Rautenhaus
  • Michael Riemer
Hosting institution
Universitätsbibliothek Mainz
Sammlungen
  • DFG-491381577-G
Resource version
Published version
DOI
10.5194/gmd-15-4447-2022
Funding acknowledgements
  • Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 491381577
File(s) embargoed
false
Open access
true
ISSN
1991-9603
Ausgabe der Veröffentlichung
11
Zeitschrift
Geoscientific Model Development
Schlüsselwörter
  • 004 Informatik
  • 004 Data processing
  • 530 Physik
  • 530 Physics
  • 550 Geowissenschaften
  • 550 Earth sciences
  • 624 Ingenieurbau und Umwelttechnik
  • 624 Civil engineering
Sprache
eng
Open access status
Open Access
Paginierung
4447 - 4468
Datum der Veröffentlichung
2022
Public URL
https://openscience.ub.uni-mainz.de/handle/20.500.12030/8864
Herausgeber
Copernicus
Datum der Datenerfassung
2023
Datum, an dem der Datensatz öffentlich gemacht wurde
2023
Zugang
Public
Titel
A novel method for objective identification of 3-D potential vorticity anomalies
Ausgabe der Zeitschrift
15

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