Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Hella, Garny"'
Publikováno v:
Communications Earth & Environment, Vol 5, Iss 1, Pp 1-7 (2024)
Abstract Extreme states of the polar stratospheric circulation during winter tend to be followed by anomalies in the near-surface circulation for several weeks, especially over the North Atlantic/Eurasia (NAE) sector. Previous research has highlighte
Externí odkaz:
https://doaj.org/article/388e0e1ac93f44f0845e1e4fc836080e
Publikováno v:
Geophysical Research Letters, Vol 50, Iss 17, Pp n/a-n/a (2023)
Abstract Sudden stratospheric warming (SSW) events can form a window of forecast opportunity for polar vortex predictions on subseasonal‐to‐seasonal time scales. Analyzing numerical ensemble simulations, we quantify the associated enhanced predic
Externí odkaz:
https://doaj.org/article/46302b537ea24065a13bf53083a01dbb
Publikováno v:
Journal of the Atmospheric Sciences. 80:611-631
The stratospheric polar vortex is dynamically coupled to the tropospheric circulation. Therefore, a better mechanistic understanding of this coupled system is important to interpret past and future circulation changes correctly. Previously, idealized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46ac54127241f2c89eba9eef03fee62d
https://doi.org/10.1175/jas-d-21-0232.1
https://doi.org/10.1175/jas-d-21-0232.1
Gravity waves (GWs) transport energy within the atmosphere both in vertical and horizontal direction. While the former is considered in climate models via parameterizations, the latter is often not modeled in most long time simulations. Especially or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a062106194eb719432612f6f03ea81be
https://doi.org/10.5194/egusphere-egu23-11529
https://doi.org/10.5194/egusphere-egu23-11529
The tropical circulation is typically not well represented in idealized models used to study jet dynamics. We implement a convective relaxation algorithm into a dry dynamical core model following Schneider and Walker (2006) to improve the representat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b59972e9148f085d8b71bc0673e3ba2d
https://doi.org/10.5194/egusphere-egu23-8399
https://doi.org/10.5194/egusphere-egu23-8399
Sudden stratospheric warming (SSW) events can form a window of forecast opportunity for polar vortex predictions on subseasonal-to-seasonal time scales. Analysing numerical ensemble simulations, we show that negative wind anomalies in the polar strat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77ee01278b23269d9422a3b86cd413c4
https://doi.org/10.5194/egusphere-egu23-9027
https://doi.org/10.5194/egusphere-egu23-9027
Autor:
Roland Eichinger, Sebastian Rhode, Hella Garny, Peter Preusse, Petr Pisoft, Aleš Kuchar, Patrick Jöckel, Astrid Kerkweg, Bastian Kern
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf59821b2c5e9d6ba41966d1383f002b
https://doi.org/10.5194/egusphere-2023-270-supplement
https://doi.org/10.5194/egusphere-2023-270-supplement
Autor:
Roland Eichinger, Sebastian Rhode, Hella Garny, Peter Preusse, Petr Pisoft, Aleš Kuchar, Patrick Jöckel, Astrid Kerkweg, Bastian Kern
Publikováno v:
eISSN
The columnar approach of gravity wave (GW) parameterisations in weather and climate models has been identified as a potential reason for dynamical biases in middle atmospheric dynamics. For example, GW momentum flux (GWMF) discrepancies between model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8693a163f9191d6bc739aab086b22bf3
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-270/
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-270/
Publikováno v:
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
In the lower stratosphere during winter, variability of stratospheric ozone is governed primarily by transport dynamics induced by wave-mean flow interactions. Here, we focus on interannual co-variations between the zonal mean ozone distribution and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d56ab78fc08cc211add2a1292492a21
https://acp.copernicus.org/preprints/acp-2023-32/
https://acp.copernicus.org/preprints/acp-2023-32/
Autor:
Kameswarrao Modali, Dominik Sander, Sebastian Brune, Philip Rupp, Hella Garny, Johanna Baehr, Marc Rautenhaus
Ensemble forecasting has become a standard means to obtain information about forecast uncertainties in meteorological centres across the world. The large datasets generated by ensemble prediction systems carry much information that is difficult to an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1edd8b3a0b50aa023388d47a8d040393
https://doi.org/10.5194/ems2022-531
https://doi.org/10.5194/ems2022-531