In 2002, climatologists from the University of Ohio State who worked on the Quelccaya ice cap in the Peruvian Andes, found themselves face to face with a specimen of a kind of foam (Distichia muscoides) long in the ice. Carbon dated, the sample was found to 5177 years old (roughly 50 years). According to researchers, this discovery would be the consequence of global warming that pissed each year a little more the largest tropical glacier in the world and thus made accessible plant. Today Quelccaya - which rises to
5600 few meters above sea level - lost thirty meters per year, a figure 40 times that in 1970 years. While it is true that the glacier mass tends to vary, Lonnie Thompson and colleagues estimate that the age of the plant they have unearthed illustrates the exceptional character of the cast that we are witnessing. Data from the National Climatic Data Center go in the same direction; they indicate that the ten warmest years on record since global temperature measurements were
started at the end of 19ème century all occurred since 1990.
WSJ 22 / 10 / 04 (When a plant Emerges from melting glacier, is it global warming?)