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Author |
Duran-alarcon C., A. Berne A, B. Boudevillan, C. Genthon, Et J. Grazioli |
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Title |
Multi-instrumental observations of solid precipitation at Dumont D'Urville, Antarctica |
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2017 |
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1143 |
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6675 |
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Atmospheric moisture supersaturations in the near-surface atmosphere of Dome C, Antarctic Plateau |
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Conference - International - Communication |
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2017 |
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EGU 2017, 23-28 April, 2017 Vienna, Austria |
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1013 |
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Bachelor's thesis |
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6676 |
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Title |
The Ability of a General Circulation Model to represent the Atmospheric Boundary Layer over the Antarctic Plateau |
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Conference - International - Communication |
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2017 |
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EGU 2017, 23-28 April, 2017 Vienna, Austria |
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1013 |
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6677 |
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Lemonnier, F., J.-b. Madeleine, C. Claud, C. Genthon, G. Krinner, H. Gallee, A. Berne, J. Grazioli, F. Hourdin, L. Fairhead, L. Mellul, And E. Vignon. |
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Title |
Precipitation in Antarctica : comparaison between Cloudsat observations and the LMDz global climate model |
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Conference - International - Communication |
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2017 |
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EGU 2017, 23-28 April, 2017 Vienna, Austria |
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1143 |
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Bachelor's thesis |
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yes |
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6714 |
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Title |
Low-level precipitation sublimation on the coasts of East Antarctica |
Type |
Conference - International - Communication |
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Year |
2017 |
Publication |
EGU 2017, 23-28 April, 2017 Vienna, Austria |
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1143 |
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yes |
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6715 |
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Title |
Around the pole: evolution of sub?Antarctic Ranunculus |
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Journal |
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Year |
2017 |
Publication |
Journal of Biogeography |
Abbreviated Journal |
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Volume |
44 |
Issue |
4 |
Pages |
875-886 |
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Keywords |
dispersal divergence time estimates ecomorphology historical biogeography phylogenetic biogeography Ranunculus sub?Antarctic islands |
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Abstract |
Abstract Aim Despite an improved understanding of Southern Hemisphere plant biogeography, the origins and evolution of sub?Antarctic floras remain poorly studied. Here, we investigate the historical biogeography of sub?Antarctic representatives of the genus Ranunculus. We aimed to establish when and from where the sub?Antarctic ranunculi originated as well as to examine the extent to which ecomorphological traits explain contemporary biogeographical patterns. Location Southern temperate and sub?Antarctic zones. Methods We first estimated a dated phylogeny for Ranunculus using combined chloroplast and nuclear data for 53 accessions; divergence times were inferred based on three temporal calibrations. We then used non?parametric multidimensional scaling to evaluate the ecomorphological diversity of 67 austral ranunculi representing a combination of sub?Antarctic species and those restricted to lower latitude landmasses. Results Phylogenetic analyses indicated that several Ranunculus lineages have colonized the sub?Antarctic islands. Divergence time estimates suggest recent arrival from source areas in Australia, New Zealand or South America. Species exhibiting two distinct ecomorphological trait combinations occur in both sub?Antarctic and lower latitude habitats; the proportions of each combination differed significantly between these areas. Main conclusions Ranunculus has colonized the sub?Antarctic on several occasions, most often arriving from the lower latitude landmasses prior to the Last Glacial Maximum. Taken together our analyses suggest that chance effects are likely to have influenced species arrival. However, following arrival trait?environment interactions appear to have been important for the subsequent establishment and persistence of ranunculi in sub?Antarctic habitats. |
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Programme |
136,1116 |
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Bachelor's thesis |
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ISSN |
0305-0270 |
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0305-0270 |
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yes |
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Call Number |
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Serial |
6734 |
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Author |
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Title |
Antarctica-Regional Climate and Surface Mass Budget |
Type |
Book Chapter |
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Year |
2017 |
Publication |
Current Climate Change Reports |
Abbreviated Journal |
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Volume |
3 |
Issue |
4 |
Pages |
303-315 |
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Abstract |
We review recent literature on atmospheric, surface ocean and sea-ice observations and modeling results in the Antarctic sector and relate the observed climatic trends with the potential changes in the surface mass balance (SMB) of the ice sheet since 1900. Estimates of regional scale SMB distribution and trends remain subject to large uncertainties. Approaches combining and comparing multiple satellite and model-based assessments of ice sheet mass balance aim at reducing these knowledge gaps. During the last decades, significant changes in atmospheric circulation occurred around Antarctica, due to the exceptional positive trend in the Southern Annular Mode and to the climate variability observed in the tropical Pacific at the end of the twentieth century. Even though climate over the East Antarctic Ice-Sheet remained quite stable, a warming and precipitation increase was observed over the West Antarctic Ice-Sheet and over the West Antarctic Peninsula (AP) during the twentieth century. However, the high regional climate variability overwhelms climate changes associated to human drivers of global temperature changes, as reflected by a slight recent decadal cooling trend over the AP. Climate models still fail to accurately reproduce the multi-decadal SMB trends at a regional scale, and progress has to be achieved in reproducing atmospheric circulation changes related to complex ocean/ice/atmosphere interactions. Complex processes are also still insufficiently considered, such as (1) specific polar atmospheric processes (clouds, drifting snow, and stable boundary layer physics), (2) surface firn physics involved in the surface drag variations, or in firn air depletion and albedo feedbacks. Finally, progress in reducing the uncertainties relative to projections of the future SMB of Antarctica will largely depend on climate model capability to correctly consider teleconnections with low and mid-latitudes, and on the ability to correct them for biases, taking into account the coupling between ocean, ice, and atmosphere in high southern latitudes. |
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Programme |
411,1154 |
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Bachelor's thesis |
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ISSN |
2198-6061 |
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2198-6061 |
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yes |
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6735 |
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Title |
Interpreting ELISA analyses from wild animal samples: Some recurrent issues and solutions |
Type |
Book Chapter |
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Year |
2017 |
Publication |
Functional Ecology |
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Volume |
31 |
Issue |
12 |
Pages |
2255-2262 |
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333,1151 |
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Bachelor's thesis |
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0269-8463 |
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0269-8463 |
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yes |
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6740 |
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Author |
Sarah Kada, Karen D. McCoy, Thierry Boulinier |
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Title |
Impact of life stage-dependent dispersal on the colonization dynamics of host patches by ticks and tick-borne infectious agents |
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Book Chapter |
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Year |
2017 |
Publication |
Parasites & Vectors |
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10 |
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375 |
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Allee effect Borrelia burgdorferi Climate change Ixodes uriae Lyme disease Ornithodoros maritimus Parasite spread Range expansion Vertical transmission |
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Abstract |
When colonization and gene flow depend on host-mediated dispersal, a key factor affecting vector dispersal potential is the time spent on the host for the blood meal, a characteristic that can vary strongly among life history stages. Using a 2-patch vector-pathogen population model and seabird ticks as biological examples, we explore how vector colonization rates and the spread of infectious agents may be shaped by life stage-dependent dispersal. We contrast hard (Ixodidae) and soft (Argasidae) tick systems, which differ strongly in blood- feeding traits. |
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333,1151 |
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ISSN |
1756-3305 |
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1756-3305 |
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yes |
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6742 |
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Title |
Atmospheric drying as the main driver of dramatic glacier wastage in the southern Indian Ocean |
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2016 |
Publication |
Scientific Reports |
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6 |
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32396 |
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688,1048,1154 |
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Bachelor's thesis |
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2045-2322 |
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2045-2322 |
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6743 |
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