The Younger Dryas event was not like a regular climate change
VERN BENDER
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
The Younger Dryas was a significant and abrupt change in the world climate, from roughly 12,900 to around 11,700. The change lasted about 1,300 years. The temperatures dropped big time, entering into a near-glacial period. This happened immediately after there was an increase in temperatures 14,500 years ago. This ended the last 100,000-year ice age. The warming led to melting ice glaciers in North America and Europe. The Younger Dryas showed up when the climate became warm again. The cause of The Younger Dryas is still being debated. One explanation is that the Thermohaline Circulation was disrupted, causing less heat from the south to reach the northern areas. Or an El Nino caused the warm-up.
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
The Younger Dryas event was not like a regular climate change. Temperature fluctuations occurred before, during, and after the phenomenon. The period led to the extinction of mammals like the mammoth and the disappearance of the Clovis people in North America. An asteroid hit also cooled things off. There are other examples of climate fluctuations during the past 50,000 years. Nothing stays the same forever. Change never goes away.
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
The lake was drained completely 9,900 years ago.
With the ice sheet retreating after nearly 1,000 years, a channel to the north (now the Nelson River) drained Lake Agassiz’s 285,000-sq-km (110,000-sq-mile) into Hudson Bay, leaving Lakes Winnipeg, Winnipegosis, and Manitoba, and Lake of the Woods as remnants.
WHAT’S UP WITH TODAY’S GLOBAL WARMING?
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
GLOBALLY GO TO 100% NUCLEAR POWER PLANTS ASAP.
The best scientific estimate shows that emissions of greenhouse gases from human activities are responsible for approximately 1.1°C of warming from 1850-1900. In the next 20 years, global temperatures will rise 1.6 degrees centigrade. Of course, mitigating factors can’t be predicted with accuracy.
Remember the ozone hole crisis of the 1980s? The ozone layer, which lies high in the atmosphere, shields us from harmful ultraviolet (UV) rays that come from the Sun. Human activities effectively punched a hole in it, using gases like chlorofluorocarbons (CFCs) in spray cans and refrigerants, which break down ozone molecules in the upper atmosphere.
The ozone hole is closing. It is predicted to be gone in a decade or two.
Some mitigating options: Use energy more efficiently. Install renewables.
Conserve water. Reduce, reuse, recycle. Travel less. Source locally. Ship goods more efficiently. Conserve wetlands. Capture carbon from the air and bury it in the earth.
Catch a lucky climate break. A cool-down cycle—an axis tilt.
