Segawa, T.; Takeuchi, N.; Rivera, A.; Yamada, A.; Yoshimura, Y; Barcaza, G.; Shinbori, K.; Motoyama, H.; Kohshima, S & Ushida, K. (2013) : "Distribution of antibiotic resistance genes in glacier environments" Environmental Microbiology Reports, 5(1), 127–134.

Antibiotic resistance genes are biologically transmitted from microorganism to microorganism in particular micro-environments where dense microbial communities are often exposed to an intensive use of antibiotics, such as intestinal microflora, and the soil microflora of agricultural fields. Howe...


Schwikowski, M., M. Schläppi, P. Santibañez, A. Rivera and Casassa G. (2013) : "Net accumulation rates derived from ice core stable isotope records of Pío XI glacier, Southern Patagonia Icefield" The Cryosphere, 7, 1635-1644.

Pío XI, the largest glacier of the Southern Patagonia Icefield, reached its neoglacial maximum extent in 1994 and is one of the few glaciers in that area which is not retreating. In view of the recent warming it is important to understand glacier responses to climate changes. Due to its remotene...


Turney, C. C. Fogwill, T. Van Ommen, A. Moy, D. Etheridge, M. Rubino, M. Curran and A. Rivera (2013) : "Late Pleistocene and early Holocene change in the Weddell Sea: a new climate record from the Patriot Hills, Ellsworth Mountains, West Antarctica" Journal of Quaternary Science, 28(7) 697–704.

The transition from the late Pleistocene to the Holocene (30 000–5000 years ago) was a period of considerable climate variability, which has been associated with changes in deep water formation and the intensity of the Meridional Overturning Circulation. Although numerous records exist across t...


PAGES2K Consortium, including A. Rivera (2013) : "Continental-scale temperature variability during the last two millennia" Nature Geoscience, DOI:10.1038/NATGEO1797 .

Past global climate changes had strong regional expression. Toelucidate their spatio-temporal pattern, we reconstructed past temperatures for seven continental-scale regions during the past one to two minennia. The most coherent feaure in nearly all of the regional temperature reconstructions is ...


Melkonian, A. M. Willis, M. Pritchard, A. Rivera, F. Bown and S. Bernstein (2013) : "Satellite-derived volume loss rates and glacier speeds for the Cordillera Darwin Icefield, Chile" The Cryosphere, 7, 823–839.

We produce the first icefield-wide volume change rate and glacier velocity estimates for the Cordillera Darwin Icefield (CDI), a 2605 km2 temperate icefield in southern Chile (69.6º W, 54.6ºS). Velocities are measured from optical and radar imagery between 2001–2011. Thirty-six digital elevat...


Rivera, A. and F. Bown (2013) : "Recent glacier variations on active ice capped volcanoes in the Southern Volcanic Zone (37º-46ºS), Chilean Andes" Journal of South American Earth Sciences, 45: 345-356.

Glaciers in the southern province of the Southern Volcanic Zone (SVZ) of Chile (37-46ºS) have experienced significant frontal retreats and area losses in recent decades which have been primarily triggered by tropospheric warming and precipitation decrease. The resulting altitudinal increase of ...


1 2 3 4 5 6  7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23