The high-rise Tibetan Plateau is much lower than it used to be, a new study of snail shells has revealed.
Health Effects of Global Warming/What is Global Warming?
Greenhouse effect causes excessive heat to build up in the earth’s atmosphere causing global warming and affects the environment and health.
Greenhouse effect causes excessive heat to build up in the earth’s atmosphere causing global warming and affects the environment and health.
The research team employed a cutting-edge geochemical tool, "clumped" isotope thermometry, using modern and fossil snail shells to investigate the uplift history of the Zhada basin in southwestern Tibet. Views range widely on the timing of surface uplift of the Tibetan Plateau to its current high (4.5km) over more than 2.5 square kilometers. Specifically, interpretations differ on whether the modern high elevations were recently developed or are largely a continuation of high elevations developed prior to India-Asian collision in the Eocene.
Clumped isotope temperatures of modern and fossil snail shells have recorded changing lake water temperatures over the last nine million years. This is a reflection of changes in surface temperature as a function of climate and elevation change. A key to their Zhada Basin paleo-elevation reconstruction is that Huntington and colleagues were able to contextualize them with sampling of modern and Holocene-age tufa and shells from a range of aquatic environments.
Air Conditioner Health Hazards
This section gives a brief introduction about what air conditioner health hazard means and what kind of people get affected by it, and what causes them.
This section gives a brief introduction about what air conditioner health hazard means and what kind of people get affected by it, and what causes them.
It was also found that the Zhada basin was significantly colder from three to nine million years ago, implying a loss of elevation of more than one kilometer since the Pliocene. While surprising given the extreme (4km) elevation of the basin today, the higher paleo-elevation helps explain paleontological evidence of cold-adapted mammals living in a high-elevation climate, and was probably the local expression of east-west extension across much of the southern Tibetan Plateau at this time.
Advertisement
Permafrost Thawing may Accelerate Global Warming
Researchers have found new evidence that permafrost thawing is releasing large quantities of greenhouse gases into the atmosphere via plants, which could accelerate global warming.
Researchers have found new evidence that permafrost thawing is releasing large quantities of greenhouse gases into the atmosphere via plants, which could accelerate global warming.
Source-ANI
