Ocean – Page 6 – Desdemona Despair

Annual temperatures for Alaska, 1900-2018. Alaska’s ten coldest years on record (blue dots) all occurred before 1980. Meanwhile, nine of its ten warmest years on record have occurred since 1980. Data: NASA GISS and UAF / Brian Brettschneider. Graphic: Rick Thoman / Alaska Center for Climate Assessment and Policy

October 21, 2022

Warming waters causing mass die-off of Alaska snow crabs – Total numbers down 84 percent since 2018 – “The cold-water habitat they need was virtually absent, which suggests that temperature is really the key culprit in this population decline”

20 October 2022 (CBS News) – Climate change is a prime suspect in a mass die-off of Alaska’s snow crabs, experts say, after the state took the unprecedented step of canceling their harvest this season to save the species. According to an annual survey of the Bering Sea floor carried out by the National Oceanic and Atmospheric Administration, […]

The location of climate tipping elements in the cryosphere (blue), biosphere (green) and ocean/atmosphere (orange), and global warming levels their tipping points will likely be triggered at 1.5°C. Researchers see signs of destabilisation already in parts of the West Antarctic and Greenland ice sheets, in permafrost regions, the Amazon rainforest, and potentially the Atlantic overturning circulation as well. Graphic: Earth Commission / Globaïa

September 25, 2022

World at risk of passing multiple climate tipping points above 1.5°C global warming

8 September 2022 (Stockholm Resilience Centre) – Multiple climate tipping points could be triggered if global temperature rises beyond 1.5°C above pre-industrial levels, according to a major new analysis published in the journal Science. Even at current levels of global heating the world is already at risk of passing five dangerous climate tipping points, and risks […]

Satellite view of Hurricane Fiona at 1 p.m. on Monday, 19 September 2022. Photo: NOAA

September 19, 2022

Hurricane Fiona unleashes “catastrophic” damage, Puerto Rico governor says

By Arelis R. Hernández, Jason Samenow, Praveena Somasundaram, and Reis Thebault 19 September 2022 (The Washington Post) – Puerto Rican Gov. Pedro Pierluisi said Monday that Hurricane Fiona has caused “catastrophic” destruction in urban areas, killing at least one person and leaving nearly the entire island archipelago without power. The slow-moving Category 1 storm could drop upward […]

Daily surface air temperature anomaly for July 2022 relative to the daily average for the period 1991–2020. Data: ERA5. Graphic: Copernicus Climate Change Service / ECMWF

September 18, 2022

Europe’s hot summer of 2022 shatters records – “We’ve not only had record August temperatures for Europe but also for summer, with the previous summer record only being one year old”

By Matt McGrath 8 September 2022 (BBC News) – This summer was the hottest on record in Europe, according to data from EU satellite monitoring. A series of extreme heatwaves and a long running drought saw June, July and August shatter the previous high mark for temperature. The Copernicus Climate Change Service said the data showed August […]

Sea surface temperature anomaly for the Atlantic Ocean, 5 August 2022. Graphic: Scott Duncan

September 18, 2022

An intense marine heat wave is setting ocean temperature records in the North Atlantic – “Every marine heat wave is going to be warmer than the last because of rises in greenhouse gases”

By Denise Chow 7 September 2022 (NBC News) – It’s not just land seeing record heat waves. Ocean waters in the Northern Hemisphere have been unusually warm in recent weeks, with parts of the North Atlantic and northern Pacific undergoing particularly intense marine heat waves. Sea surface temperatures in these regions hit record levels this […]

(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 […]

Aerial view of a salmon farm operated by New Zealand King Salmon. Photo: New Zealand King Salmon

May 29, 2022

Major New Zealand salmon producer shuts farms as warming waters cause mass die-offs – “We thought we had more time”

By Tess McClure 26 May 2022 AUCKLAND (The Guardian) – New Zealand’s biggest king salmon farmer says it is shutting some of its farms after warming seas prompted mass die-offs of fish, warning that it is a “canary in the coalmine” for climate change. New Zealand is the world’s largest producer of king, or “chinook” […]

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 […]

An octopus is pictured “stilt-walking” with a variety of collected trash. A new study crowdsourced hundreds of images, including this one, that observed octopuses using human garbage for a variety of tasks. Photo: Serge Abourjeily

April 3, 2022

Octopuses are using human garbage as shelter, camouflage and more, study finds – “It’s becoming so common that they’re using these items to protect themselves with instead of their natural shelters, such as seashells, which are becoming scarce in the ocean”

9 March 2022 (CBC Radio) – A new study suggests it’s becoming increasingly common for octopuses to use bottles, cans and other human trash to shelter themselves, camouflage their dens and even house their young. “We believe this is because of the high abundance of these artificial items — you know, the litter item — […]

Two bird species that are extinct but not listed as such, for fear of committing the “Romeo Error”. Both species are still listed as Critically Endangered by IUCN because of the slim chance that one or more birds may still be alive. Such species are therefore not counted among extinct species, and vast sums of money are often spent in the vain hope that they will be found again. I Left: Eskimo curlew (Numenius borealis (Forster)), from Audubon (1827–1838: plate 208; Wikimedia Commons). Right: Bachman's warbler (Vermivora bachmani (Audubon)), from Audubon (1827–1838: plate 185 (detail); Creative Commons, Rawpixel). Graphic: Wikimedia Commons / Rawpixel

January 19, 2022

Earth on trajectory to Sixth Mass Extinction say biologists – “Including invertebrates is key to confirming that we are indeed witnessing the onset of the Sixth Mass Extinction in Earth’s history”

By Marcie Grabowski 14 January 2022 (UH News) – Mass biodiversity extinction events caused by extreme natural phenomena have marked the history of life on Earth five times. Today, many experts warn that a Sixth Mass Extinction crisis is underway, this time entirely caused by human activities. A comprehensive assessment of evidence of this ongoing […]