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The auroral red line polarisation: modelling and measurements
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-12)
In this work, we model the polarisation of the auroral red line using the electron impact theory developed by Bommier et al.
(2011). This theory enables the computation of the distribution of the Degree of Linear Polarisation (DoLP) as a function of
height if the flux of precipitated electrons is provided as input.
An electron transport code is used to infer the stationary electron flux at each ...
Change in turbopause altitude at 52 and 70° N
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-02-26)
The turbopause is the demarcation between atmospheric
mixing by turbulence (below) and molecular diffusion
(above). When studying concentrations of trace species
in the atmosphere, and particularly long-term change, it may
be important to understand processes present, together with
their temporal evolution that may be responsible for redistribution
of atmospheric constituents. The general ...
Complexity signatures in the geomagnetic H-component recorded by the Tromsø magnetometer (70°N, 19°E) over the last quarter of a century
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
Characteristics of Arctic tides at CANDAC-PEARL (80 degrees N, 86 degrees W) and Svalbard (78 degrees N, 16 degrees E) for 2006-2009 : radar observations and comparisons with the model CMAM-DAS
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Operation of a Meteor Radar (MWR) at Eureka, Ellesmere Island (80° N, 86° W) began in February 2006: this is the location of the Polar Environmental and Atmospheric Research Laboratory (PEARL), operated by the "Canadian Network for the Detection of Atmospheric Change" (CANDAC). The first 36 months of tidal wind data (82–97 km) are here combined with contemporaneous tides from the Meteor Radar (MWR) ...
Vertical and interhemispheric links in the stratosphere-mesosphere as revealed by the day-to-day variability of Aura-MLS temperature data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2009)
Tropopause height at 78 degrees N 16 degrees E: average seasonal variation 2007-2010
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
We present a seasonal climatology of tropopause altitude for 78° N 16° E derived from observations 2007–2010 by the SOUSY VHF radar on Svalbard. The spring minimum occurs one month later than that of surface air temperature and instead coincides with the maximum in ozone column density. This confirms similar studies based on radiosonde measurements in the arctic and demonstrates downward control by ...
Tropopause height at 78°N 16°E: average seasonal variation 2007-2010
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
We present a seasonal climatology of tropopause altitude for 78° N 16° E derived from observations 2007–2010 by the SOUSY VHF radar on Svalbard. The spring minimum occurs one month later than that of surface air temperature and instead coincides with the maximum in ozone column density. This confirms similar studies based on radiosonde measurements in the arctic and demonstrates downward control by ...
Characteristics of Arctic winds at CANDAC-PEARL (80 degrees N, 86 degrees W) and Svalbard (78 degrees N, 16 degrees E) for 2006-2009: radar observations and comparisons with the model CMAM-DAS
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
Operation of a Meteor Wind Radar (MWR) at Eureka, Ellesmere Island (80° N, 86° W) began in February 2006; this is the location of the Polar Environmental and Atmospheric Research Laboratory (PEARL), operated by the "Canadian Network for the Detection of Atmospheric Change" (CANDAC). The first 36 months of wind data (82–97 km) are here combined with contemporaneous winds from the Meteor Wind Radar ...
Mesospheric turbulence during PMWE-conducive conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2007)
Relationship between variability of the semidiurnal tide in the Northern Hemisphere mesosphere and quasi-stationary planetary waves throughout the global middle atmosphere
(Journal article; Tidsskriftartikkel; Peer reviewed, 2009)