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Author |
Charles Amory, Christoph Kittel |
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Title |
Brief communication: Rare ambient saturation during drifting snow occurrences at a coastal location of East Antarctica |
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Journal |
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Year |
2019 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
13 |
Issue |
12 |
Pages |
3405-3412 |
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Programme  |
1013 |
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1994-0416 |
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yes |
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Call Number |
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Serial |
7638 |
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Title |
Arctic Snowfall from CloudSat Observations and Reanalyses |
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Journal |
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Year |
2020 |
Publication |
Journal of Climate |
Abbreviated Journal |
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Volume |
33 |
Issue |
6 |
Pages |
2093-2109 |
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Programme |
1013 |
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Thesis |
Bachelor's thesis |
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ISSN |
0894-8755 |
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yes |
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Serial |
7657 |
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Author |
F. Lemonnier, J.-B. Madeleine, C. Claud, C. Palerme, C. Genthon, T. L'Ecuyer, N. B. Wood |
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Title |
CloudSat-Inferred Vertical Structure of Snowfall Over the Antarctic Continent |
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Journal |
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Year |
2019 |
Publication |
Journal of Geophysical Research: Atmospheres |
Abbreviated Journal |
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Volume |
125 |
Issue |
2 |
Pages |
e2019JD031399 |
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Keywords |
Antarctica climatology CloudSat cloud-profiling radar precipitation snowfall vertical structure |
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Programme |
1013 |
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ISSN |
2169-8996 |
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yes |
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Serial |
7697 |
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Author |
Steven J. A. van der Linden, John M. Edwards, Chiel C. van Heerwaarden, Etienne Vignon, Christophe Genthon, Igor Petenko, Peter Baas, Harmen J. J. Jonker, Bas J. H. van de Wiel |
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Title |
Large-Eddy Simulations of the Steady Wintertime Antarctic Boundary Layer |
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Journal |
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Year |
2019 |
Publication |
Boundary-Layer Meteorology |
Abbreviated Journal |
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Volume |
173 |
Issue |
2 |
Pages |
165-192 |
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Abstract |
Observations of two typical contrasting weakly stable and very stable boundary layers from the winter at Dome C station, Antarctica, are used as a benchmark for two centimetre-scale-resolution large-eddy simulations. By taking the Antarctic winter, the effects of the diurnal cycle are eliminated, enabling the study of the long-lived steady stable boundary layer. With its homogeneous, flat snow surface, and extreme stabilities, the location is a natural laboratory for studies on the long-lived stable boundary layer. The two simulations differ only in the imposed geostrophic wind speed, which is identified as the main deciding factor for the resulting regime. In general, a good correspondence is found between the observed and simulated profiles of mean wind speed and temperature. Discrepancies in the temperature profiles are likely due to the exclusion of radiative transfer in the current simulations. The extreme stabilities result in a considerable contrast between the stable boundary layer at the Dome C site and that found at typical mid-latitudes. The boundary-layer height is found to range from approximately $$50\,\mathrm {m}$$50mto just $$5\,\mathrm {m}$$5min the most extreme case. Remarkably, heating of the boundary layer by subsidence may result in thermal equilibrium of the boundary layer in which the associated heating is balanced by the turbulent cooling towards the surface. Using centimetre-scale resolutions, accurate large-eddy simulations of the extreme stabilities encountered in Antarctica appear to be possible. However, future simulations should aim to include radiative transfer and sub-surface heat transport to increase the degree of realism of these types of simulations. |
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1013 |
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ISSN |
1573-1472 |
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Approved |
yes |
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Call Number |
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Serial |
7709 |
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Author |
Edel, L., J.-f. Rysman, C. Claud, C. Palerme, And C. Genthon |
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Title |
Potential of Passive Microwave around 183 GHz for Snowfall Detection in the Arctic |
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Journal |
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Year |
2019 |
Publication |
Remote sensing |
Abbreviated Journal |
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Volume |
11 |
Issue |
19 |
Pages |
2200 |
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Keywords |
snowfall; Arctic; passive microwaves; CloudSat; machine learning |
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Programme |
1013 |
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Thesis |
Bachelor's thesis |
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ISSN |
2072-4292 |
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yes |
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Call Number |
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Serial |
7718 |
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Author |
Valentin Wierner |
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Title |
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Master |
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Year |
2020 |
Publication |
Master's report |
Abbreviated Journal |
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Volume |
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Issue |
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Programme |
1013 |
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Thesis |
Bachelor's thesis |
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yes |
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Call Number |
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Serial |
7743 |
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Author |
Charles Amory |
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Title |
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Type |
Journal |
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Year |
2020 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
14 |
Issue |
5 |
Pages |
1713-1725 |
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Abstract |
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Programme |
1013 |
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Edition |
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ISSN |
1994-0416 |
ISBN |
1994-0416 |
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Approved |
yes |
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Call Number |
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Serial |
8071 |
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Author |
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Title |
The Year of Polar Prediction in the Southern Hemisphere (YOPP-SH) |
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Journal |
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Year |
2020 |
Publication |
Bulletin of the american meteorological society |
Abbreviated Journal |
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Volume |
101 |
Issue |
10 |
Pages |
E1653-E1676 |
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Abstract |
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Programme |
1013 |
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ISSN |
0003-0007, 1520-0477 |
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Approved |
yes |
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Call Number |
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Serial |
8150 |
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Author |
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Title |
Detecting Regime Transitions of the Nocturnal and Polar Near-Surface Temperature Inversion |
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Journal |
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Year |
2020 |
Publication |
Journal of the atmospheric sciences |
Abbreviated Journal |
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Volume |
77 |
Issue |
8 |
Pages |
2921-2940 |
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Abstract |
Abstract Many natural systems undergo critical transitions, i.e., sudden shifts from one dynamical regime to another. In the climate system, the atmospheric boundary layer can experience sudden transitions between fully turbulent states and quiescent, quasi-laminar states. Such rapid transitions are observed in polar regions or at night when the atmospheric boundary layer is stably stratified, and they have important consequences in the strength of mixing with the higher levels of the atmosphere. To analyze the stable boundary layer, many approaches rely on the identification of regimes that are commonly denoted as weakly and very stable regimes. Detecting transitions between the regimes is crucial for modeling purposes. In this work a combination of methods from dynamical systems and statistical modeling is applied to study these regime transitions and to develop an early warning signal that can be applied to nonstationary field data. The presented metric aims to detect nearing transitions by statistically quantifying the deviation from the dynamics expected when the system is close to a stable equilibrium. An idealized stochastic model of near-surface inversions is used to evaluate the potential of the metric as an indicator of regime transitions. In this stochastic system, small-scale perturbations can be amplified due to the nonlinearity, resulting in transitions between two possible equilibria of the temperature inversion. The simulations show such noise-induced regime transitions, successfully identified by the indicator. The indicator is further applied to time series data from nocturnal and polar meteorological measurements. |
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1013 |
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ISSN |
0022-4928, 1520-0469 |
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Approved |
yes |
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Call Number |
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Serial |
8151 |
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Title |
Brief communication: Two well-marked cases of aerodynamic adjustment of sastrugi |
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Journal |
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Year |
2016 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
10 |
Issue |
2 |
Pages |
743-750 |
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Programme |
1013 |
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ISSN |
1994-0416 |
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yes |
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Call Number |
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Serial |
8152 |
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