From State of the Climate in 2021 - World Meteorlogical Organization, October 2021.
1970-2012
Dying Himalayan Glaciers Are a Threat 1125.rtf - Melting creates out let lakes. They grow ever larger, and then they overflow. This is worst where falling rocks and hillsides, formerly held together by ice, fall into these full lakes, creating tsunamis coursing downstream from the lakes, wiping out villages, infrastructure, and lives.
Why Sea Levels Are Rising the Fastest in the Last 4,000 Years 1025.rtf
‘Stable’ Patagonia Glacier Can’t Stand the Heat, Is in Irreversible Decline 0725.rtfAlpine Glaciers in Full Retreat as Global Warming Speeds Melting 0625.rtfSwiss Village Almost All Destroyed after Glacier Collapse Buries It in Mud 0525.rtfGlacier Meltdown Risks Food and Water Supply of 2 Billion People - UN 0325.rtfWorld's Glaciers Melting Faster than Ever Before Recorded 0225.rtfMelting Alps Glacier Means Switzerland and Italy’s Border Has to Move 0924.rtfTime Is Running Out to See These Glaciers 0824.rtfWhat a Glacier Leaves Behind when it Melts 0824.rtfMelting Alaska Glacier Keeps Inundating Juneau. Floods Are Getting Worse. 0824.rtfTropical Glaciers in the Andes Are the Smallest They’ve Been in 11,700 Years 0824.rtfMost Western Canada Glaciers Will Melt in 80 Years 0123.rtfWildfires Devastated Jasper. Their Soot & Ash Put Alberta's Glaciers at Risk. 0824.rtfVenezuela Loses Its Last Glacier 0524.rtfChill Winds Blowing down Himalaya Glacier Slopes Can Slow Their Ice Melt 1223.rtfPeru Has Lost More than Half Its Water Reserves, as Glaciers Melt Rapidly 1123.rtfThe ‘Forever’ Glaciers of America’s West Aren’t Forever Anymore 0923.rtfAlpine Heat Wave Pushes Freezing Level Above Europe’s Glaciers 0823.rtfChinese Scientists Are Trying to Shield Melting Glaciers From the Sun 0723.rtfReeling Arctic Glaciers Are Leaving Bubbling Methane in Their Wake 0723.rtfPandemic Drop in Air Pollution Boosted Himalayan Snowpack 0623.rtfHimalayan Glacier Loss Speeding Up 0623.rtf - 65% faster over 2010-19, vs previous decade. 2022 was record year for ice loss. The region will lose at least 1/3 of its glaciers by 2100.Click for moreCanadian Glaciers Face Big Losses 0313.rtf
Athabaska Glacier retreat over 86 years
Ice Melt, Sea Level Rise and Superstorms - Hansen 0316.pdf - 20 pp, abridgement of the peer-reviewed publication
Cold icemelt from Antarctica spreads out along the ocean surface. That inhibits the vertical mixing (warmer water to the top) there that has driven the great ocean circulation. In Antarctica, the warmer water below the ice eats away at glaciers from underneath. Cold icemelt from Greenland leads to shutdown of the Atlantic overturning circulation.
Ice losses from Greenland and Antartica grow, modelled as exponentially, with doubling times of 10, 20, or 40 years. Sea level rises non-linearly, 5-9 meters over 50 to 150 years. This is simlar to what happened 120,000 years ago, when sea levels rose from 3-4 meters higher than today to about 9 meters higher, including 2-3 meters within several decades. (For perspective, the sea level range (maximum - minimum) over the recent ice ages was about 125 meters.)
Section Map: Ice