Satellite view of changes to the Sierra Nevada snowpack, 2006-2021. Photo: NASA

Sierra Nevada snowpack, a crucial water resource, could disappear in 25 years – “A low-to-no-snow future has massive implications for where and when water is stored in the western U.S.”

By Denise Chow 1 December 2021 (NBC News) – The Sierra Nevada snowpack, a major source of water for California, could largely disappear in 25 years if global warming continues unchecked, according to a recent study. The worrisome findings, published 26 October 2021 in the journal Nature Reviews Earth & Environment, have serious implications for California’s […]

Video shows a large, nighttime tornado whirling in Sacramento, Kentucky, illuminated only by lightning, on the night of 10 December 2021. Video: ABC News

Night of devastating tornadoes likely kills more than 100 in Kentucky – “The Mississippi River Valley and Ohio River Valley are increasingly vulnerable to more tornadic activity with time”

By Suman Naishadham and Seth Borenstein 12 December 2021 WASHINGTON (Associated Press) – The calendar said December but the warm moist air screamed of springtime. Add an eastbound storm front guided by a La Nina weather pattern into that mismatch and it spawned tornadoes that killed dozens over five U.S. states. Tornadoes in December are unusual, but […]

Average annual global wealth growth rate, 1995-2021. Graph: World Inequality Lab

Global wealth inequalities are close to early 20th century levels, at the peak of Western imperialism – “The share of income presently captured by the poorest half of the world’s people is about half what it was in 1820”

8 December 2021 (World Inequality Lab) – […] An average adult individual earns PPP €16,700 (PPP USD23,380) per year in 2021, and the average adult owns €72,900 (USD102,600). These averages mask wide disparities both between and within countries. The richest 10% of the global population currently takes 52% of global income, whereas the poorest half […]

Map showing blended land and sea surface temperature anomalies in October 2021, relative to the 1981-2010 base period. The unusually warm temperatures across much of the Northern Hemisphere land resulted in the warmest October on record for the Northern Hemisphere land, surpassing the previous record set in 2019 by 0.11°C (0.20°F). The 10 warmest Octobers for the Northern Hemisphere have occurred since 2003. Graphic: NOAA / NCEI

October 2021 was Earth’s fourth-warmest October on record and warmest on record over Northern Hemisphere land areas

By Jeff Masters and Bob Henson 15 November 2021 (Yale Climate Connections) – October 2021 was Earth’s fourth-warmest October since global record-keeping began in 1880, 0.89 degree Celsius (1.60°F) above the 20th-century average, NOAA’s National Centers for Environmental Information, NCEI, reported November 15. NASA also reported October 2021 as the fourth-warmest October on record, 1.23 degrees Celsius (2.21°F) […]

A bumblebee in flight approaches a flower. Photo: Michael Durham / Minden Pictures / Getty Images

The American bumblebee has vanished from eight states – Bee population has plummeted by 89 percent over past 20 years – “Endangered species” listing could be imminent

By Elizabeth Gamillo 6 October 2021 (Smithsonian) – The American bumblebee (Bombus pensylvanicus)—once abundant and found lazily floating around in grasslands, open prairies, and some urban areas throughout the United States—now face a rapidly declining population. According to a proposed rule released by the U.S. Fish and Wildlife Service, the species’ population has dropped nearly 90 percent […]

Map showing the temperature difference from normal across North America on 28 September 2021, as simulated by the European weather model. Hazen, North Dakota was among numerous locations that endured record-breaking heat in the northern Plains on Tuesday. Bismarck rose to 98 degrees, while Dickinson, N.D., about 60 miles southwest of Hazen, also hit 100. In South Dakota, Rapid City and Aberdeen both soared to 94, setting records for 28 September 2021. Average high temperatures in interior North Dakota in late September are in the 60s, meaning the actual readings deviated about 30 degrees from the norm. Graphic: WeatherBell / The Washington Post

It’s nearly October 2021, and the temperature hit 100°F (37.7°C) in North Dakota – “A temp of 100F one week after the autumn equinox is an absolute insanity”

By Jason Samenow 29 September 2021 (The Washington Post) – It’s a week past the autumn equinox, and the first snows have fallen in the Rockies and the mountain peaks of New England. But in Hazen, N.D., the mercury soared to the century mark Tuesday afternoon. According to several climatologists, that 100-degree reading is the highest temperature observed […]

Dickson Public Works personnel check the flooding on Old Pond Lane following record rainfall, Saturday, 21 August 2021, in Dickson, Tennessee. Heavy flooding in several Middle Tennessee counties on Saturday prompted water rescues, road closures, and communications disruptions, with several people reported missing. Flash flood warnings were in effect for Dickson, Houston and Montgomery and Stewart counties on Saturday evening. Photo: Josie Norris / The Tennessean / AP

At least 22 dead and 50 missing in catastrophic Tennessee flash floods – “Some of them described it as a tidal wave”

By Michael Levenson 21 August 2021 (The New York Times) – At least 22 people were killed and 50 others remained missing on Sunday after catastrophic flash floods swept through Middle Tennessee, the authorities said. Rob Edwards, the chief deputy of the Humphreys County Sheriff’s Office, confirmed the numbers of dead and missing on Sunday […]

Dead oysters in a commercial oyster bed that were killed by the record heat wave in British Columbia in 2021. When Judy Hicks headed to the beach on 2 July 2021, she discovered that many of her oysters had cracked-open shells, indicating they’d died during the heat wave. From 25 June 2021 to 1 July 2021, during B.C.’s unprecedented “heat dome” that caused hundreds of human fatalities, record-breaking temperatures are estimated to have killed more than one billion sea animals. Photo: Judy Hicks / The Tyee

BC’s shellfish farmers struggle after record heatwave decimates oysters – “I have been in this industry for 36 years, and I have never seen a mortality rate like this”

By Vaishnavi Dandekar 5 Aug 2021 (The Tyee) – Judy Hicks, a commercial shellfish grower in Okeover Inlet, B.C., started her day early on July 2. Weather forecasts had predicted that temperatures would reach the mid-20s that day — after hitting the mid-to-high 30s earlier that week — and Hicks wanted to avoid the heat. […]

Aerial view of Lake Oroville, seen through a thick haze of smoke from California wildfires, on 20 August 2021. Lake Oroville has a surface area of 15,000 acres but is facing the worst crisis in its 52-year history. Photo: Action News Now

California mega-drought reduces Lake Oroville reservoir to historically low level – Hydroelectric plant shuts down – “We’re in uncharted territory”

OROVILLE, California, 20 August 2021 (Action News Now) – The reach of the drought emergency has a shocking look at as Lake Oroville drains to dirt. With a surface area of just over 15,000 acres – Lake Oroville provides water and electricity and impacts the local economy as recreation is big on this lake. California’s […]

Projections of annual counts of high-tide flooding (HTF) days for the NOAA Intermediate Sea Level Rise (SLR) scenario. The NOAA minor flooding threshold is used for Honolulu, San Diego and St. Petersburg. The NOAA moderate flooding threshold is used for Boston to highlight a threshold that is not yet routinely exceeded, which is not the case for the Boston minor threshold. The 50th percentile from the ensemble of projections (blue line) and the 10th–90th percentile range (blue shading, with the 90th percentile highlighted in orange) show increasing numbers of HTF days per year. The year of inflection (YOI, open black circle) for each projection corresponds to abrupt increases in the frequency of HTF days, which are highlighted by comparing the projected increases (Δ) over two adjacent ten-year periods (dashed and solid black lines). Graphic: Thompson, et al., 2021 / Nature Climate Change

Sunny-day flooding is about to become more than a nuisance – “What’s scary about this paper is the idea of the inflection point. Can we adapt fast enough to keep pace?”

By Jim Morrison 2 August 2021 (WIRED) – During the summer of 2017, the tide rose to historic heights again and again in Honolulu, higher than at any time in the 112 years that records had been kept. Philip Thompson, director of the Sea Level Center at the University of Hawaii, wanted to know why. […]

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