Zobrazeno 1 - 10
of 426
pro vyhledávání: '"Jacobi, Ch"'
Autor:
Jacobi, Ch., Karami, K.
We analyse 43 years of mesosphere/lower thermosphere (MLT) horizontal winds obtained from a joint analysis of low frequency (LF) spaced receiver lower ionospheric drift measurements from 1979 through 2006 and very high frequency (VHF) meteor radar wi
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https://ul.qucosa.de/id/qucosa%3A88540
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Numerical experiments with the Middle and Upper Atmosphere Model with modified parameterization settings were carried out to study the response of the mesosphere/lower thermosphere (MLT) wind circulation to the non-orographic gravity waves (GWs) orig
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A85610
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https://ul.qucosa.de/api/qucosa%3A85610/attachment/ATT-0/
The ionospheric peak electron density NmF2, simulated with the Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) model was used to study the ionospheric response to solar flux in years of low (2008) and high (2013) solar activity.
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A85517
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Zeitreihen von Monatsmittelwerten des Windes in der Mesosphäre/unteren Thermosphäre über Collm werden auf mögliche Korrelationen mit der Nordatlantischen Oszillation (NAO) und der Südlichen Oszillation (SO) hin untersucht. Während eine positive
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A78004
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https://ul.qucosa.de/api/qucosa%3A78004/attachment/ATT-0/
We analyse solar extreme ultraviolet (EUV) irradiance observed by the Solar EUV Experiment (SEE) onboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite, and solar proxies (the F10.7 index, and Mg-II index), and compa
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A31767
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https://ul.qucosa.de/api/qucosa%3A31767/attachment/ATT-0/
Autor:
Samtleben, Nadja, Jacobi, Ch.
Simulations of the circulation in the middle atmosphere during northern winter performed with a nonlinear, mechanistic, global circulation model show that the upper mesospheric jet is greatly overestimated and also the position with respect to latitu
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A31793
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https://ul.qucosa.de/api/qucosa%3A31793/attachment/ATT-0/
Autor:
Mewes, Daniel, Jacobi, Ch.
We use ERA-Interim reanalysis data of 2 meter temperature to perform a pattern analysis of the Arctic temperatures exploiting an artificial neural network called Self Organizing-Map (SOM). The SOM method is used as a cluster analysis tool where the n
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A31794
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https://ul.qucosa.de/api/qucosa%3A31794/attachment/ATT-0/
Autor:
Geißler, Christoph, Jacobi, Ch.
Ensemble calculations for the period from 2000 to 2010 were carried out with the middle and upper atmosphere model (MUAM), and an analysis of the quarterdiurnal tide is performed. The global temporal and latitudinal distributions of the quarterdiurna
Externí odkaz:
https://ul.qucosa.de/id/qucosa%3A31792
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https://ul.qucosa.de/api/qucosa%3A31792/attachment/ATT-0/