| Records |
| Author |
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| Title |
International Geomagnetic Reference Field: the thirteenth generation |
Type |
Journal |
| Year |
2021 |
Publication |
Earth, Planets and Space |
Abbreviated Journal |
|
| Volume |
73 |
Issue |
1 |
Pages |
49 |
| Keywords |
Geomagnetism IGRF Magnetic field modeling |
| Abstract |
In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted the thirteenth generation of the International Geomagnetic Reference Field (IGRF). This IGRF updates the previous generation with a definitive main field model for epoch 2015.0, a main field model for epoch 2020.0, and a predictive linear secular variation for 2020.0 to 2025.0. This letter provides the equations defining the IGRF, the spherical harmonic coefficients for this thirteenth generation model, maps of magnetic declination, inclination and total field intensity for the epoch 2020.0, and maps of their predicted rate of change for the 2020.0 to 2025.0 time period. |
| Programme |
139 |
| Campaign |
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| Address |
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| Publisher |
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Place of Publication |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1880-5981 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8085 |
| Permanent link to this record |
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| Author |
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| Title |
Evaluation of candidate models for the 13th generation International Geomagnetic Reference Field |
Type |
Journal |
| Year |
2021 |
Publication |
Earth, Planets and Space |
Abbreviated Journal |
|
| Volume |
73 |
Issue |
1 |
Pages |
48 |
| Keywords |
Geomagnetism IGRF Magnetic field modeling |
| Abstract |
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| Programme |
139 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1880-5981 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7937 |
| Permanent link to this record |
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| Author |
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| Title |
Comparative egg attendance patterns of incubating polar petrels |
Type |
Journal |
| Year |
2021 |
Publication |
Animal Biotelemetry |
Abbreviated Journal |
|
| Volume |
9 |
Issue |
1 |
Pages |
17 |
| Keywords |
Biologging Cape petrel Egg neglect Egg temperatures Egg turning rates Snow petrel |
| Abstract |
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| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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| Publisher |
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Place of Publication |
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Editor |
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| Series Editor |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
2050-3385 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8091 |
| Permanent link to this record |
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| Author |
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| Title |
Location of studies and evidence of effects of herbivory on Arctic vegetation: a systematic map |
Type |
Journal |
| Year |
2021 |
Publication |
Environmental Evidence |
Abbreviated Journal |
|
| Volume |
10 |
Issue |
1 |
Pages |
25 |
| Keywords |
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| Abstract |
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| Programme |
1036 |
| Campaign |
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| Address |
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| Publisher |
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Place of Publication |
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Editor |
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| Series Editor |
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Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2047-2382 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8386 |
| Permanent link to this record |
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| Author |
Samuel Veilleux, Armelle Decaulne, Najat Bhiry |
| Title |
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Type |
Journal |
| Year |
2021 |
Publication |
Arctic Science |
Abbreviated Journal |
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| Volume |
7 |
Issue |
4 |
Pages |
798-812 |
| Keywords |
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| Abstract |
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| Programme |
1148 |
| Campaign |
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| Address |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8461 |
| Permanent link to this record |
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| Author |
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| Title |
Hemispheric asymmetry in ocean change and the productivity of ecosystem sentinels |
Type |
Journal |
| Year |
2021 |
Publication |
Science |
Abbreviated Journal |
|
| Volume |
372 |
Issue |
6545 |
Pages |
980-983 |
| Keywords |
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| Abstract |
Sampling seabirds The vastness of the worlds' oceans makes them difficult to monitor. Seabirds that forage and breed across oceans globally have been recognized as sentinels of ocean health. Sydeman et al. looked across seabird species of both the Northern and Southern Hemispheres and found varying patterns. Northern Hemisphere species exhibited greater signs of stress and reduced breeding success, indicative of low fish resources. Southern Hemisphere species showed less impact on reproductive output, suggesting that the fish populations there have thus far been less disturbed. The differences across hemispheres indicate different strategies for conservation, with active recovery needed in the north and enhanced protection in the south. Science, abf1772, this issue p. 980 Climate change and other human activities are causing profound effects on marine ecosystem productivity. We show that the breeding success of seabirds is tracking hemispheric differences in ocean warming and human impacts, with the strongest effects on fish-eating, surface-foraging species in the north. Hemispheric asymmetry suggests the need for ocean management at hemispheric scales. For the north, tactical, climate-based recovery plans for forage fish resources are needed to recover seabird breeding productivity. In the south, lower-magnitude change in seabird productivity presents opportunities for strategic management approaches such as large marine protected areas to sustain food webs and maintain predator productivity. Global monitoring of seabird productivity enables the detection of ecosystem change in remote regions and contributes to our understanding of marine climate impacts on ecosystems. The breeding success of seabirds is tracking hemispheric differences in ocean warming and human impacts. The breeding success of seabirds is tracking hemispheric differences in ocean warming and human impacts. |
| Programme |
109 |
| Campaign |
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Place of Publication |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0036-8075, 1095-9203 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7980 |
| Permanent link to this record |
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| |
| Author |
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| Title |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
Type |
Journal |
| Year |
2021 |
Publication |
Science |
Abbreviated Journal |
|
| Volume |
372 |
Issue |
6546 |
Pages |
1097-1101 |
| Keywords |
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| Abstract |
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| Programme |
902 |
| Campaign |
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Edition |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8254 |
| Permanent link to this record |
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| Author |
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| Title |
Global political responsibility for the conservation of albatrosses and large petrels |
Type |
Journal |
| Year |
2021 |
Publication |
Science Advances |
Abbreviated Journal |
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| Volume |
7 |
Issue |
10 |
Pages |
eabd7225 |
| Keywords |
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| Abstract |
Migratory marine species cross political borders and enter the high seas, where the lack of an effective global management framework for biodiversity leaves them vulnerable to threats. Here, we combine 10,108 tracks from 5775 individual birds at 87 sites with data on breeding population sizes to estimate the relative year-round importance of national jurisdictions and high seas areas for 39 species of albatrosses and large petrels. Populations from every country made extensive use of the high seas, indicating the stake each country has in the management of biodiversity in international waters. We quantified the links among national populations of these threatened seabirds and the regional fisheries management organizations (RFMOs) which regulate fishing in the high seas. This work makes explicit the relative responsibilities that each country and RFMO has for the management of shared biodiversity, providing invaluable information for the conservation and management of migratory species in the marine realm. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8369 |
| Permanent link to this record |
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| Author |
Casey Youngflesh, Yun Li, Heather J. Lynch, Karine Delord, Christophe Barbraud, Rubao Ji, Stephanie Jenouvrier |
| Title |
Lack of synchronized breeding success in a seabird community: extreme events, niche separation, and environmental variability |
Type |
Journal |
| Year |
2021 |
Publication |
Oikos |
Abbreviated Journal |
|
| Volume |
130 |
Issue |
11 |
Pages |
1943-1953 |
| Keywords |
Antarctica environmental indicators extreme events global change niche separation synchrony |
| Abstract |
Synchrony in ecological systems, the degree to which elements respond similarly over time or space, can inform our understanding of how ecosystems function and how they are responding to global change. While studies of ecological synchrony are often focused on within-species dynamics, synchrony among species may provide important insights into how dynamics of one species are indicative of conditions relevant to the larger community, with both basic and applied implications. Ecological theory suggests there may be conditions under which communities might exhibit increased synchrony, however, the degree to which these patterns are borne out in natural systems is currently unknown. We used long-term breeding success data from a community of Antarctic seabirds to assess the degree of interspecific, community synchrony, and the role that extreme events play in driving these dynamics. We assessed theoretical links between community synchrony, niche separation, and environmental variability using data from this and three other seabird communities as well as a simulation study. Results show that reproductive success for individual species in the Antarctic seabird community fluctuated relatively independently from one another, resulting in little synchrony across this community, outside of extreme years. While an exceptionally poor year for a given species was not necessarily associated with an exceptionally poor year for any other species, one community-wide extreme year existed. When compared to other seabird communities, this group of Antarctic seabirds exhibited lower overall synchrony and higher estimated niche separation, supporting theoretical predictions. Empirical and simulation-derived results suggest that communities where temporal variation is small for conditions in which species respond substantially differently, and large for conditions in which species respond similarly, may exhibit more synchronous dynamics. Identifying where and why synchronous dynamics might be more apparent has the potential to inform how ecological communities might respond to future global change. |
| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1600-0706 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8385 |
| Permanent link to this record |
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| Author |
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| Title |
Huff and puff and blow down: invasive plants traits response to strong winds at the Southern Oceanic Islands |
Type |
Journal |
| Year |
2021 |
Publication |
Oikos |
Abbreviated Journal |
|
| Volume |
130 |
Issue |
11 |
Pages |
1919-1929 |
| Keywords |
environmental filter functional traits hypervolume Iles Kerguelen intraspecific variability mechanical stress |
| Abstract |
Invasions constitute a major driver of biodiversity changes. Insular plant communities are particularly vulnerable to invasions and are relevant models for investigating mechanisms supporting the establishment and spread of introduced plants. Terrestrial flora of sub-Antarctic islands must often thrive in highly windy habitats, thus imposing strong mechanical constraints on individuals. Many alien plants at the sub-Antarctic islands are of tropical or temperate origins, where they were exposed to less stringent wind conditions. As wind likely represents a strong environmental filter for the successful establishment and further geographic spread of plants, they should have developed responses to resist and successfully colonize the Iles Kerguelen. We studied responses to wind of three herbaceous species that are invasive at Iles Kerguelen. We sampled plant individuals at different locations, under windy and sheltered conditions. Traits related to wind avoidance and tolerance and to resource acquisition were measured. We additionally assessed individual performance (biomass) to determine the consequences of trait variations. We focused on trait mean and variance, in particular, through the calculation of hypervolumes. This study emphasized that wind has important effects on plant economics spectrum, including traits involved in mechanical avoidance and light acquisition, with varying strategies, which seem to depend on the biological type of the species (grass versus non-grass). Wind generally reduces individual performance, and this negative effect is not direct but operates through the modification of plant trait values. Furthermore, analyses performed at the hypervolume scale indicate that not only functional trait mean but also its variability account for plant performance. The existence of contrasting growth strategies to cope with local environmental conditions suggests that invaders will be able to occupy different niches, which may ultimately impact local communities. Our results highlight the importance of considering multi-traits responses to meaningfully capture plant adjustments to stress. |
| Programme |
136 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1600-0706 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8372 |
| Permanent link to this record |
