The role of stratosphere-troposphere coupling in the occurrence of extreme winter cold spells over northern Europe

Autor: Lorenzo Tomassini, Mark P. Baldwin, Felix Bunzel, Marco Giorgetta

Publikováno v: Journal of Advances in Modeling Earth Systems, Vol 4, Iss 10, Pp M00A03-14 (2012)

Extreme cold spells over Northern Europe during winter are examined in order to address the question to what degree and in which ways stratospheric dynamics may influence the state of the troposphere. The study is based on 500 years of a pre-industri

Externí odkaz: https://doaj.org/article/83a96ac416024815a7f6f853ec6bde31

Retrievals of Arctic sea-ice volume and its trend significantly affected by interannual snow variability

Autor: Dirk Notz, Felix Bunzel, Leif Toudal Pedersen

Publikováno v: Geophysical Research Letters
Bunzel, F, Notz, D & Pedersen, L T 2018, ' Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability ', Geophysical Research Letters, vol. 45, no. 21, pp. 11,751-11,759 . https://doi.org/10.1029/2018GL078867

We estimate the uncertainty of satellite-retrieved Arctic sea-ice thickness, sea-ice volume, and their trends stemming from the lack of reliable snow-thickness observations. To do so, we simulate a Cryosat2-type ice-thickness retrieval in an ocean-mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::152ff6c475eb84a17c6fd2c6bb174aaf
https://hdl.handle.net/21.11116/0000-0002-8060-021.11116/0000-0002-9E76-8

The Brewer–Dobson Circulation in a Changing Climate: Impact of the Model Configuration

Autor: Hauke Schmidt, Felix Bunzel

Publikováno v: Journal of the Atmospheric Sciences

Most climate models simulate a strengthening of the Brewer–Dobson circulation (BDC) under a changing climate. However, the magnitude of the trend as well as the underlying mechanisms varies significantly among the models. In this work the impact of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bbbe49b350716d80cfd713278f4416d
https://doi.org/10.1175/jas-d-12-0215.1

Stratospheric Variability at a glance – Analysis of the intra decadal timescale and the QBO

Autor: Duy Cai, Phoebe Graf, Martin Dameris, Patrick Jöckel, Hella Garny, Felix Bunzel

In this study the stratospheric variability is analysed from decadal to seasonal timescales. Relevant processes for the decadal timescale are identified by means of power spectral analysis. The inspection of the ERA-Interim reanalysis data set shows

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30af97141480f969c342da10d36d2823
https://doi.org/10.5194/acp-2016-870

The effects of mixing on age of air

Autor: Harald Bönisch, Hella Garny, Felix Bunzel, Thomas Birner

Publikováno v: Journal of Geophysical Research-Atmospheres

Mean age of air (AoA) measures the mean transit time of air parcels along the Brewer-Dobson circulation (BDC) starting from their entry into the stratosphere. AoA is determined both by transport along the residual circulation and by two-way mass exch

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcd5ecb9a08c28c457af05b1a02cad4b
https://elib.dlr.de/90734/