Arctic – Page 5 – Desdemona Despair

Millennium-scale evolution of the Atlantic Meridional Overturning Circulation (AMOC), 400 - 2020. SST-based AMOC reconstructions (light and dark blue) compared to various proxy reconstructions, including land and sea surface temperature reconstructions, sortable silt data, δ18O in benthic foraminifera, δ15N of deep-sea gorgonian corals, and relative abundance of Turborotalita quinqueloba. Since at least 400 AD relatively stable, the AMOC began to decline during the 19th Century which is evident in all proxy records. Around 1950 a phase of particularly rapid decline started that is found in several, largely independent proxies. A short-lived recovery is evident in the 1990s before a return to decline from the mid-2000s. Together these data consistently show that the modern AMOC slowdown is unprecedented in over a thousand years. Graphic: Levke Caesar

March 21, 2021

Gulf Stream System at its weakest in more than a millennium – “This could bring us dangerously close to the tipping point at which the flow becomes unstable”

25 February 2021 (PIK) – Never before in over 1000 years the Atlantic Meridional Overturning Circulation (AMOC), also known as Gulf Stream System, has been as weak as in the last decades. This is the result of a new study by scientists from Ireland, Britain, and Germany. The researchers compiled so-called proxy data – taken […]

Observed sea-level rise in Rockport, Texas, 1969-2020 and projected to 2050. Rockport has the second-highest annual rise rate (7.1 mm/year in 2020), and the highest projected sea-level rise for 2050 at 0.82 meters (2.69 ft) above mean sea level in 1992. Graphic: VIMS

February 28, 2021

U.S. sea-level report cards: 2020 again trends toward acceleration – Water levels at 26 of 32 stations rose at higher rate than in 2019

By David Malmquist 24 January 2021 (VIMS) – Sea level “report cards” issued annually by researchers at William & Mary’s Virginia Institute of Marine Science add further evidence of an accelerating rate of sea-level rise during 2020 at nearly all tidal stations along the U.S. coastline. The team’s web-based report cards project sea level to […]

Infographic showing costs of natural disasters in 2020. Global losses from natural disasters in 2020 came to US$210 billion. The hurricane season in the North Atlantic was hyperactive, with a record-setting 30 storms, 13 of which reached hurricane status. Graphic: Munich Re

January 10, 2021

Global natural disaster figures for 2020 – “The hurricane season in the North Atlantic was hyperactive”

7 January 2021 (Munich Re) – Global losses from natural disasters in 2020 came to US$ 210bn, of which some US$ 82bn was insured. Both overall losses and insured losses were significantly higher than in the previous year (2019: US$ 166bn and US$ 57bn respectively). The US share of losses was rather high: Natural disasters in the […]

Average annual global temperature (deg C) relative to 1850-1900. 2020 tied with 2016 as the hottest year on record. Data: ERA5 / Copernicus Climate Change Service. Graphic: The Guardian

January 9, 2021

2020 tied 2016 for hottest year ever recorded – “The extraordinary climate events of 2020 show us we have no time to lose”

By Damian Carrington 8 January 2021 (The Guardian) – The climate crisis continued unabated in 2020, with the joint highest global temperatures on record, alarming heat and record wildfires in the Arctic, and a record 29 tropical storms in the Atlantic. Despite a 7% fall in fossil fuel burning due to coronavirus lockdowns, heat-trapping carbon dioxide continued to build […]

Caribou and geese at Teshekpuk Lake in North Slope Borough, Alaska in 2019. The Trump administration, in its final days, decided to open millions more acres of land in the Alaskan Arctic to oil and gas drilling, including the wetlands around Teshekpuk Lake, which are a crucial breeding area for migratory birds and calving grounds for roaming caribou. Photo: Bonnie Jo Mount / The Washington Post

January 9, 2021

Trump administration opens millions more acres of Alaska to drilling – “A last-minute and irresponsible effort to open an enormous amount of land in a sensitive area”

By Dino Grandoni 5 January 2021 (The Washington Post) – The Trump administration, in its final days, decided to open millions more acres of land in the Alaskan Arctic to oil and gas drilling. The decision from the Bureau of Land Management on Monday, finalized just two weeks before President Trump is set to leave office, will […]

Map showing the age of sea ice in the Arctic at winter maximum in 2000 (left, week of March 18) and 2020 (right, week of March 21). Ice older than 5 years (white) is very rare today; only a small ribbon remains along the islands of the Canadian Arctic. Age is a stand-in for ice thickness and durability; young ice is thinner and more likely to melt in the summer. NOAA Climate.gov map, based on data from the National Snow and Ice Data Center. Graphic: NOAA

December 14, 2020

Sea ice loss and extreme wildfires mark another year of Arctic change – “The transformation of the Arctic to a warmer, less frozen, and biologically changed region is well underway”

8 December 2020 (NOAA) – NOAA’s 15th Arctic Report Card catalogs for 2020 the numerous ways that climate change continues to disrupt the polar region, with second-highest air temperatures and second-lowest summer sea ice driving a cascade of impacts, including the loss of snow and extraordinary wildfires in northern Russia. The Arctic Report Card is […]

Map showing surface air temperature anomaly for November 2020 relative to the November average for the period 1981-2010. Data source: ERA5. Graphic: Copernicus Climate Change Service / ECMWF

December 7, 2020

Global November temperatures reached a record high in 2020 – Europe experienced its warmest autumn on record

7 December 2020 (Copernicus Climate Change Service) – The Copernicus Climate Change Service (C3S), implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF) on behalf of the European Commission, announced today that global average temperatures in November 2020 were the highest recorded for the month by a clear margin in the C3S data set. Reanalysis data […]

Record flooding caused this landslide in Haines, Alaska on 2 December 2020. Photo: Seaba Heli / Facebook

December 3, 2020

“The wettest day ever”: At least 6 people missing, homes destroyed after record-breaking Southeast Alaska rainstorm

By Jessica Flores 3 December 2020 (USA TODAY) – Evacuations and search and rescue efforts were underway Wednesday after a record-breaking rainstorm swept across Southeast Alaska, triggering mudslides and widespread flooding. Multiple precipitation records were broken Tuesday across the region, including a single-day rainfall record from 1946, according to the National Weather Service in Juneau. […]

Global map of temperature anomalies relative to the 1981-2010 long-term average from the ERA5 reanalysis for January to October 2020. Graphic: Copernicus Climate Change Service / ECMWF

December 2, 2020

WMO: 2020 on track to be one of three warmest years on record – More than 80 percent of the global ocean experienced a marine heatwave in 2020

GENEVA, 2 December 2020 (WMO) – Climate change continued its relentless march in 2020, which is on track to be one of the three warmest years on record. 2011-2020 will be the warmest decade on record, with the warmest six years all being since 2015, according to the World Meteorological Organization. Ocean heat is at […]

Radar images from the Sentinel-1 satellite of the Milne Ice Shelf breakup at the end of July 2020. Photo: Dr. Adrienne White / Canadian Ice Service

August 7, 2020

Canada’s last fully intact Arctic ice shelf collapses – “This was the largest remaining intact ice shelf, and it’s disintegrated, basically”

By Moira Warburton 6 August 2020 (Reuters) – The last fully intact ice shelf in the Canadian Arctic has collapsed, losing more than 40% of its area in just two days at the end of July, researchers said on Thursday. The Milne Ice Shelf is at the fringe of Ellesmere Island, in the sparsely populated […]