sea level – Page 5 – Desdemona Despair

(a) Annual mean temperature anomalies in the Arctic (66.5∘–90∘N) (dark colours) and globally (light colours) during 1950–2021 derived from the various observational datasets. Temperature anomalies have been calculated relative to the standard 30-year period of 1981–2010. Shown are also the linear temperature trends for 1979–2021. (b) Annual mean temperature trends for the period 1979–2021, derived from the average of the observational datasets. Areas without a statistically significant change are masked out. (c) Local amplification ratio calculated for the period 1979–2021, derived from the average of the observational datasets. The dashed line in (b) and (c) depicts the Arctic Circle (66.5∘N latitude). Graphic: Rantanen, et al., 2022 / Communications Earth and Environment

August 14, 2022

Arctic warming four times faster than rest of Earth – “Something is happening in the Arctic, and it will affect us all”

PARIS, 11 August 2022 (AFP) – The Arctic has warmed nearly four times faster than the rest of the planet over the last 40 years, according to research published Thursday that suggests climate models are underestimating the rate of polar heating. The United Nations’ climate science panel said in a special report in 2019 that […]

Global map showing the highest marine heatwave (MHW) category experienced at each pixel in 2021 (reference period 1982–2011). Light grey indicates that no MHW occurred in a pixel over the entire year. (b) Stacked bar plot showing the percentage of the surface of the ocean experiencing an MHW on any given day of the year. (c) Stacked bar plot showing the cumulative percentage of the surface of the ocean that experienced an MHW over the year. Note: These values are based on when in the year a pixel first experienced its highest MHW category, so no pixel is counted twice. Horizontal lines in this figure show the final percentages for each category of MHW. (d) Stacked bar plot showing the cumulative number of MHW days averaged over the surface of the ocean. Note: This average is calculated by dividing the cumulative sum of MHW days per pixel weighted by the surface area of those pixels. Data: National Oceanic and Atmospheric Administration Optimum Interpolation Sea Surface Temperature (NOAA OISST). Graphic: Robert Schlegel

May 22, 2022

WMO: Four key climate change indicators broke records in 2021 – Past seven years have been the warmest seven years on record – “A dismal litany of humanity’s failure to tackle climate disruption”

GENEVA, 18 May 2022 (WMO) – Four key climate change indicators – greenhouse gas concentrations, sea level rise, ocean heat and ocean acidification – set new records in 2021. This is yet another clear sign that human activities are causing planetary scale changes on land, in the ocean, and in the atmosphere, with harmful and […]

Coastal flooding at the historic site at Jamestown, Virginia in 2009. Three feet of water accumulated after a storm. Such events now occur several times a year, and the site is often closed for safety reasons. Photo: Michael Lavin / Jamestown Rediscovery

May 7, 2022

Jamestown: America’s first English settlement now endangered by rising sea level – “There is basically a five-year window at Jamestown”

By Jane O’Brien 4 May 2022 JAMESTOWN, Virginia (BBC News) – One of the most important historic sites in America has been put on a list of endangered places. Preservation groups warn that Jamestown, Virginia, may not survive another generation because of climate change. In 1607, the small island near the mouth of the Chesapeake […]

Antarctic sea ice extent for 25 February 2022, was 1.92 million square kilometers (741,000 square miles). The orange line shows the 1981 to 2010 average extent for that day. Graphic: National Snow and Ice Data Center

April 3, 2022

WMO: Antarctic heat, rain, and ice prompt concern – “This event is rewriting record books and our expectations about what is possible in Antarctica”

1 April 2022 (WMO) – Record high temperatures, rain and the collapse of an ice shelf in East Antarctica have prompted questions and concern about the possible role of climate change in the coldest and driest part of the world. Record high temperatures, rain and the collapse of an ice shelf in East Antarctica have […]

John Lawrence and Payton Campbell (unseen at rear) with their children Harlow and Aria inspect a flooded road near their home on 2 March 2022 in Dungay, Australia. Several northern New South Wales towns were forced to evacuate as Australia faced unprecedented storms and the worst flooding in a decade. Photo: Dan Peled / Getty Images

March 29, 2022

Coastal home buyers are ignoring rising flood risks, despite clear warnings and rising insurance premiums

By Risa Palm and Toby W. Bolsen 25 March 2022 (The Conversation) – Apollo Beach, Florida, is a maze of canals lined with hundreds of houses perched right near the water’s edge. The whole community, just south of Tampa, is only about 3 feet above sea level, meaning it’s at risk from storm surge as […]

Satellite view of the Conger/Glenzer (Bowman Island) ice shelf collapse in March 2022. Scientists are concerned because the ice shelf collapsed in East Antarctica, an area that had long been thought to be stable. The collapse in March 2022 was the first time scientists have ever seen an ice shelf collapse in this cold area of Antarctica. Photo: NASA / AP

March 27, 2022

Thinning Antarctic ice shelf finally crumbles after extreme heatwave – “The Glenzer Conger ice shelf presumably had been there for thousands of years, and it’s never going to be there again”

By Isla Binnie 25 March 2022 (Reuters) – An East Antarctica ice shelf disintegrated this month following a period of extreme heat in the region, according to scientists. Satellite images show the 1,200 square-kilometre Conger Ice Shelf collapsed completely on or around March 15. “Possible it hit its tipping point following the #Antarctic #AtmosphericRiver and […]

(a) Total, (b) global, (c) linear, and (d) regional and local nonlinear sea-level rise (SLR) rates for three sites (New Jersey, Cheesequake; Florida, Nassau; Scotland, Kyle of Tongue) are shown with the time of emergence for each site. Model predictions are the mean with 1σ uncertainty. Note variable y-axes. Graphic: Walker, et al., 2022 / Nature Communications

February 21, 2022

Onset of modern sea level rise began in 1863, international study finds – “We can be virtually certain the global rate of sea-level rise from 1940 to 2000 was faster than all previous 60-year intervals over the last 2,000 years”

18 February 2022 (Rutgers University) – An international team of scientists including Rutgers researchers has found that modern rates of sea level rise began emerging in 1863 as the Industrial Age intensified, coinciding with evidence for early ocean warming and glacier melt. The study, which used a global database of sea-level records spanning the last […]

Maps showing regional sea level linear rates of rise (mm/year) from satellite altimetry over three different time periods: (a) 1993–2006, (b) 2007–2020, and (c) 1993–2020. Linear rates of change of relative sea level (ocean and land height changes) from tide gauges over the same time period are also shown (circles). Graphic: Sweet, et al., 2022 / NOAA

February 19, 2022

U.S. coastline to see up to a foot of sea level rise by 2050 – Report projects a century of sea level rise in 30 years – “These numbers mean a change from a single flooding event every 2-5 years to multiple events each year”

15 February 2022 (NOAA) – The United States is expected to experience as much sea level rise by the year 2050 as it witnessed in the previous hundred years. That’s according to a NOAA-led report updating sea level rise decision-support information for the U.S. released today in partnership with half a dozen other federal agencies. […]

Estimated economic impacts of unmitigated climate change on seven geographical regions in the United States. Over the next 50 years, climate change-induced economic losses in the U.S. could total approximately $14.5 trillion in present-value terms. Graphic: Deloitte

February 7, 2022

Climate change-induced losses in the U.S. could total $14.5 trillion by 2070 – “In a climate-damaged world of 2070, the U.S. could lose nearly 4 percent of GDP in that year alone”

By Rachel Koning Beals 26 January 2022 (MarketWatch) – Definitive and deliberate climate action from Wall Street to Washington and beyond could deliver a $3 trillion gain to the U.S. economy over the next 50 years to 2070. But it’s the toll of inaction that would cost the nation nearly five times that amount, a […]

$Satellite view of Antarctica’s Thwaites Glacier on 28 December 2015 (left) and 31 March 2021 (right). On 13 December 2021, Ice scientists at the American Geophysical Union (AGU) meeting in New Orleans warned that great cracks and fissures had opened up both on top of and underneath the Thwaites glacier, one of the biggest in the world, and it may fracture and collapse, possibly within five years. Photo: ESA Sentinel-1$

December 22, 2021

Antarctica’s “doomsday” glacier: how its collapse could trigger global floods and swallow islands – “If Thwaites were to collapse, it would drag most of West Antarctica’s ice with it”

By Ella Gilbert 22 December 2021 (The Conversation) – The massive Thwaites glacier in West Antarctica contains enough ice to raise global sea levels by 65 centimeters if it were to completely collapse. And, worryingly, recent research suggests that its long-term stability is doubtful as the glacier haemorrhages more and more ice. Adding 65 centimeters to global sea levels […]