Posts Tagged ‘sediment’
Tropical rain has varied with ocean impact
U. PITTSBURGH (US) — Historic lake sediment reveals that the factors producing drier climates in Central America today actually caused wetter conditions a few hundred years ago. Continue…
Monday, February 4, 2013 15:21 - 0 Comments
Earth & Environment - Jun 26, 2012 10:43 - 0 Comments
Sediment core reveals Arctic warm spells
U. WASHINGTON (US) — The Arctic has gone through intensely warm periods—warmer than scientists thought was possible—in the last 2.8 million years, new research shows. (more…)
Earth & Environment - Jan 13, 2010 17:38 - 0 Comments
Stirring up question of PCBs
U. IOWA—The Indiana Harbor and Ship Canal is contaminated with polychlorinated biphenyls (PCBs) and scientists are unsure whether planned dredging in the next few years will help or hurt the situation. (more…)
Earth & Environment - Oct 20, 2009 11:32 - 0 Comments
Arctic cores signal ‘unique’ climate shift
U. COLORADO (US)—An analysis of sediment cores indicates that biological and chemical changes occurring at a remote Arctic lake are unprecedented over the past 200,000 years and likely are the result of human-caused climate change. (more…)
Earth & Environment - Oct 5, 2009 19:08 - 0 Comments
Alfalfa sprouts recreate meandering stream
UC BERKELEY (US)—Researchers report the first experimental creation of meanders in a flume—a scaled-down model of a natural channel using alfalfa sprouts to represent vegetated stream banks. The experiments reveal some of the necessary conditions to form meanders on Earth and throughout the solar system. (more…)
Earth & Environment - Sep 21, 2009 15:58 - 0 Comments
Human activity threatens world’s river deltas
U. COLORADO (US)—Of the world’s 33 major deltas, 24 are sinking, in large part due to human activity, and 85 percent experienced severe flooding in recent years, a new study finds. (more…)
Earth & Environment - Aug 17, 2009 4:00 - 0 Comments
Harbinger of hurricanes to come
PENN STATE (US)—In an effort to foresee future hurricane activity, a team of scientists looked to the past and reconstructed 1,500 years of hurricanes using two independent methods. (more…)
