Records |
Author |
|
Title |
Modelling the earth's magnetic field from global to regional scales, in: Geomagnetic Observations and Models, IAGA Special Sopron Book Series |
Type |
Book Chapter |
Year |
2011 |
Publication |
|
Abbreviated Journal |
|
Volume |
5 |
Issue |
|
Pages |
229-264 |
Keywords |
Earth and Environmental Science, |
Abstract |
In the recent years, a large amount of magnetic vector and scalar data have been measured or made available to scientists. They cover different ranges of altitudes from ground to satellite levels and have high horizontal densities over some geographical areas. Processing these potential field data may require alternatives to the widely used Spherical Harmonics. During the past decades, new techniques have been proposed to model regionally the magnetic measurements. They complement the set of older approaches that were revived and sometimes revised in the meantime. The amount of available techniques is intimidating and one often wonders which method is the most appropriate for what purpose. In this paper, we review several modelling strategies. Starting from the Spherical Harmonics, we discuss methods with global support (wavelets, multi-scale, Slepian functions,) and then bring the focus on regional methods with local support (Rectangular Harmonic Analysis, Cylindrical Harmonic Analysis, Spherical Caps,). We briefly examine the theoretical aspects and properties of each approach. We compare them with the help of a unique set of perfect synthetic data that mimic an ideal spatial distribution at a fixed surface. This helps us to better emphasize the theoretical characteristics of each approach and suggest, when relevant, improvements that would be useful for future practical applications. |
Programme |
139;905 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
Bachelor's thesis |
Publisher |
Springer Netherlands |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
978-90-481-9858-0 |
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
3579 |
Permanent link to this record |
|
|
|
Author |
Miteva R, Klein K-L, Malandraki O, Dorrian G, |
Title |
Solar Energetic Particle Events in the 23rd Solar Cycle: Interplanetary Magnetic Field Configuration and Statistical Relationship with Flares and CMEs
|
Type |
Journal Article |
Year |
2013 |
Publication |
SOLAR PHYSICS |
Abbreviated Journal |
|
Volume |
282 |
Issue |
2 |
Pages |
579-613- |
Keywords |
Coronal mass ejections, interplanetary, Energetic particles, Magnetic fields, interplanetary, |
Abstract |
We study the influence of the large-scale interplanetary magnetic field configuration on the solar energetic particles (SEPs) as detected at different satellites near Earth and on the correlation of their peak intensities with the pa\-rent solar activity. We selected SEP events associated with X and M-class flares at western longitudes, in order to ensure good magnetic connection to Earth. These events were classified into two categories according to the global interplanetary magnetic field (IMF) configuration present during the SEP pro\-pagation to 1~AU: standard solar wind or interplanetary coronal mass ejections (ICMEs). Our analy\-sis shows that around 20\% of all particle events are detected when the spacecraft is immersed in an ICME. {\bf The correlation of the peak particle intensity with the projected speed of the SEP-associated coronal mass ejection is similar in the two IMF categories of proton and electron events, $\sim 0.6$.} The SEP events show stronger correlation of the peak proton intensity with the soft X-ray flux of the associated solar flare, $r=0.67^{\pm 0.13}$, compared to the SEP events propagating in the standard solar wind, $r=0.36^{\pm 0.13}$. {\bf The difference is more pronounced for near-relativistic electrons. The main reason for the different correlation behaviour seems to be the larger spread of the flare longitude in the SEP sample detected in the solar wind as compared to SEP events within ICMEs. We discuss to which extent observational bias, different physical processes (particle injection, transport, etc.) and the IMF configuration can influence the relationship between SEPs and coronal activity |
Programme |
227 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Springer Netherlands |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0038-0938 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
4019 |
Permanent link to this record |
|
|
|
Author |
|
Title |
|
Type |
Journal Article |
Year |
2013 |
Publication |
BOUNDARY-LAYER METEOROLOGY |
Abbreviated Journal |
|
Volume |
146 |
Issue |
1 |
Pages |
133-147- |
Keywords |
Antarctica, Blowing snow, Regional climate model, Surface mass balance, |
Abstract |
|
Programme |
1013 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Springer Netherlands |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0006-8314 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
4202 |
Permanent link to this record |
|
|
|
Author |
|
Title |
Microbial sequences retrieved from environmental samples from seasonal Arctic snow and meltwater from Svalbard, Norway
|
Type |
Journal Article |
Year |
2010 |
Publication |
Extremophiles |
Abbreviated Journal |
Geochim. Cosmochim. Acta |
Volume |
14 |
Issue |
2 |
Pages |
205-212 -212 |
Keywords |
Biomedical and Life Sciences, |
Abstract |
|
Programme |
399 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
Bachelor's thesis |
Publisher |
Springer Japan |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1431-0651 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
253 |
Permanent link to this record |
|
|
|
Author |
Salam Alex P, |
Title |
Stress Challenges and Immunity in Space
|
Type |
Book Chapter |
Year |
2012 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
425-439 |
Keywords |
Biomedical and Life Sciences, |
Abstract |
Concordia Antarctic research station is one of the most isolated research stations on the planet and shares many stressor characteristics with deep space-long duration missions (DSLD). I spent a year at the Concordia in 2009 as a researcher in human biology and medicine for the European Space Agency, investigating the consequences of chronic stress on immunity and sleep. I discuss my experience and offer some brief thoughts on the parallels with DSLD missions. |
Programme |
|
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
Bachelor's thesis |
Publisher |
Springer Berlin Heidelberg |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
978-3-642-22272-6 |
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
1889 |
Permanent link to this record |
|
|
|
Author |
|
Title |
Polar Monitoring: Seabirds as Sentinels of Marine Ecosystems
|
Type |
Book Chapter |
Year |
2013 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
205-230 |
Keywords |
Biodiversity, Biogeosciences, climate change, Ecology, Environmental Monitoring/Analysis, Evolutionary Biology, |
Abstract |
The Intergovernmental Panel on Climate Change (IPCC 2007) has highlighted an urgent need to assess how ecosystems respond to climate change. This has placed a large Earth and Life Sciences focus on polar regions, as these areas are so far experiencing the strongest and the most rapid global environmental changes. |
Programme |
137 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Springer Berlin Heidelberg |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
978-3-642-27348-3, 978-3-642-27349-0 |
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
4454 |
Permanent link to this record |
|
|
|
Author |
|
Title |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries
|
Type |
Journal Article |
Year |
2013 |
Publication |
CLIMATE DYNAMICS |
Abbreviated Journal |
|
Volume |
41 |
Issue |
11-12 |
Pages |
3247-3260- |
Keywords |
Downscaling, Surface mass balance, Surface energy balance, Orographic precipitation, Antarctica, Sea-level, Climate-change, Ice-sheet, |
Abstract |
About 75 % of the Antarctic surface mass gain occurs over areas below 2,000 m asl, which cover 40 % of the grounded ice-sheet. As the topography is complex in many of these regions, surface mass balance modelling is highly dependent on horizontal resolution, and studying the impact of Antarctica on the future rise in sea level requires physical approaches. We have developed a computationally efficient, physical downscaling model for high-resolution (15 km) long-term surface mass balance (SMB) projections. Here, we present results of this model, called SMHiL (surface mass balance high-resolution downscaling), which was forced with the LMDZ4 atmospheric general circulation model to assess Antarctic SMB variability in the twenty first and the twenty second centuries under two different scenarios. The higher resolution of SMHiL better reproduces the geographical patterns of SMB and increase significantly the averaged SMB over the grounded ice-sheet for the end of the twentieth century. A comparison with more than 3200 quality-controlled field data shows that LMDZ4 and SMHiL reproduce the observed values equally well. Nevertheless, field data below 2,000 m asl are too scarce to efficiently show the added value of SMHiL and measuring the SMB in these undocumented areas should be a future scientific priority. Our results suggest that running LMDZ4 at a finer resolution (15 km) may give a future increase in SMB in Antarctica that is about 30 % higher than by using its standard resolution (60 km) due to the higher increase in precipitation in coastal areas at 15 km. However, a part (~15 %) of these discrepancies could be an artefact from SMHiL since it neglects the foehn effect and likely overestimates the precipitation increase. Future changes in the Antarctic SMB at low elevations will result from the competition between higher snow accumulation and runoff. For this reason, developing downscaling models is crucial to represent processes in sufficient detail and correctly model the SMB in coastal areas. |
Programme |
411,1013 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
Bachelor's thesis |
Publisher |
Springer Berlin Heidelberg |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0930-7575 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
4768 |
Permanent link to this record |
|
|
|
Author |
|
Title |
Patterns, processes and vulnerability of Southern Ocean benthos: a decadal leap in knowledge and understanding
|
Type |
Journal Article |
Year |
2013 |
Publication |
MARINE BIOLOGY |
Abbreviated Journal |
Mar. Biol. |
Volume |
160 |
Issue |
9 |
Pages |
2295-2317- |
Keywords |
|
Abstract |
|
Programme |
1124 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Springer Berlin Heidelberg |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0025-3162 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
4836 |
Permanent link to this record |
|
|
|
Author |
|
Title |
|
Type |
Journal Article |
Year |
2014 |
Publication |
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY |
Abbreviated Journal |
Behav. Ecol. Sociobiol. |
Volume |
68 |
Issue |
5 |
Pages |
721-732- |
Keywords |
Time budget, Behavior, Glucocorticoid, Pygoscelis adeliae, Reproduction, Reproductive performances, |
Abstract |
Glucocorticoid hormones (GCs) are important mediators of physiological and behavioral responses to stress. While many studies have evaluated the environmental, behavioral, or physiological correlates of GCs and their effects on reproductive performances, further work is needed to clarify the relationship between GCs and fitness. Assessing the effects of increased GC levels on specific behaviors of breeding animals should improve our understanding of how GCs affect parental care. In this experimental study, we measured the effects of an experimental increase in corticosterone (CORT, the main avian GC) levels on the behavior of free-living male Ad,lie penguins (Pygoscelis adeliae) within the colony, their reproductive output, and the indirect consequences of both on the behavior of their partners. We show that increased CORT levels in males decreased their foraging time at sea while increased their attendance at the nest, although their attentiveness toward the nest itself decreased. In addition, treated males spent more time on comfort behaviors (e.g., preening), vocalizing, and engaging in positive social interactions relative to controls. Treatment further affected the behavior of their partners, but not chick begging and feeding rates. Penguins with increased CORT levels also exhibited decreased reproductive output. Previous studies of Ad,lie penguins in different life history stages and environmental conditions suggest that the consequences of CORT treatment on reproductive performance are context-dependent. In addition to the potential delay in the effects of increased CORT levels on reproduction, this context dependence should be taken into account when studying the behavior of free-living animals in relation to stress-inducing situations.
|
Programme |
1091 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Springer Berlin Heidelberg |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0340-5443 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
4996 |
Permanent link to this record |
|
|
|
Author |
|
Title |
Trace elements in tissues of white-chinned petrels (Procellaria aequinoctialis) from Kerguelen waters, Southern Indian Ocean
|
Type |
Journal Article |
Year |
2014 |
Publication |
POLAR BIOLOGY |
Abbreviated Journal |
Polar Biol. |
Volume |
37 |
Issue |
6 |
Pages |
763-771- |
Keywords |
Heavy metals, Seabirds, Procellariiformes, Southern Ocean, Sub-Antarctic Islands, |
Abstract |
|
Programme |
109 |
Campaign |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Springer Berlin Heidelberg |
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0722-4060 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
yes |
Call Number |
|
Serial |
5050 |
Permanent link to this record |