coral bleaching – Desdemona Despair

A map of the world plotted with some of the most significant climate events that occurred during November 2023. Graphic: NOAA/NCEI

December 29, 2023

NOAA reports 2023 hottest year on record, so far – “We will look back at 2023 and think of it as: remember that year that wasn’t so bad?”

By Lauren Sommer 28 December 2023 (NPR) – As 2023 draws to a close, it’s going out on top. “It’s looking virtually certain at this point that 2023 will be the hottest year on record,” says Zeke Hausfather, climate scientist at Berkeley Earth, a non-profit that analyzes climate trends. Though temperature records from December have […]

(a) Linear trends in sea surface temperature (SST) (°C per decade) over the period 1982–2022. (b) Area-averaged time series of SST anomalies (°C) relative to the 1982–2022 reference period for the areas indicated in grey dashed lines in 5(a). Source: Derived from the Copernicus Marine Service remote sensing products available at https://doi.org/10.48670/moi-00168 (for 1982–2021) and https://doi.org/10.48670/moi-00165 (for 2022). Graphic: WMO

August 20, 2023

Pacific island sea levels rising faster than global average, WMO says – Economic damage in Southwest Pacific due to flooding in 2022 was $8.5 billion, almost triple compared to the previous year

By Gabrielle Tétrault-Farber 17 August 2023 GENEVA (Reuters) – Sea levels in the South-West Pacific are rising faster than the global average, threatening low-lying islands while heat damages marine ecosystems, the U.N. meteorological agency said on Friday. In its State of the Climate in the South-West Pacific 2022 report, the World Meteorological Organization (WMO) said […]

This photo provided by the University of Miami Coral Reef Futures Lab, shows bleaching to elkhorn coral on Thursday, 20 July 2023, in the North Dry Rocks Reef off the coast of Key Largo, Fla. Some Florida Keys corals are losing their color weeks earlier in the summer than has been documented before, meaning they are under stress and their health is potentially endangered, federal scientists said. Photo: Liv Williamson / University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science / AP

July 31, 2023

Florida’s record hot ocean temperatures cause early coral bleaching – Some reefs in the Florida Keys have already lost all their color – “We are at least a month ahead of time, if not two months”

By Cecelia Smith-Schoenwalder 26 July 2023 (US News & World Report) – Record high ocean temperatures around the Florida Keys are driving coral reefs to lose their color weeks earlier than usual in the latest sign that climate change and El Niño are pushing the world into uncharted territory. On Monday, a buoy in the […]

Map showing Biodiversity Intactness Index for the year 2020 at 0.25° resolution. The global average is 77 percent. Data: Natural History Museum, 2022. Graphic: WWF / ZSL

October 27, 2022

WWF’s Living Planet Report 2022 reveals devastating 69 percent average drop in wildlife populations since 1970 – “We have cut away the very foundation of life and the situation continues to worsen”

TORONTO, 12 October 2022 (WWF-Canada) – Monitored wildlife populations — mammals, birds, amphibians, reptiles, and fish — have seen a devastating 69 per cent drop on average since 1970 according to WWF’s Living Planet Report (LPR) 2022. The report highlights the stark outlook of the state of nature and urgently warns governments, businesses and the public to take […]

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 […]

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 […]

This photo from 7 March 2022 shows coral bleaching on the Great Barrier Reef, off the coast of the Australian state of Queensland. Australia’s Great Barrier Reef experienced its sixth massive bleaching event in 2022 as climate change has warmed the ocean, raising concerns over whether one of the world’s natural wonders is nearing a tipping point. Photo: Glenn Nicholls / AFP / Getty Images

March 27, 2022

Global warming deals another blow to the Great Barrier Reef – “This is a first mass bleaching event during a La Niña”

By Darryl Fears 26 March 2022 (The Washington Post) – Australia’s Great Barrier Reef is experiencing its sixth massive bleaching event as climate change has warmed the ocean, raising concerns over whether one of the world’s natural wonders is nearing a tipping point. Reef managers confirmed Friday that aerial surveys detected catastrophic bleaching on 60 […]

An ocean heatwave is shown in this map off the coast of New South Wales, Australia, 30 December 2021. Graphic: OceanCurrent

January 6, 2022

Extreme marine heatwave as waters off Sydney set to break temperature records – “It appears now to be reaching record levels and will likely be the hottest January on record”

By Graham Readfearn 4 January 2022 (The Guardian) – Waters off Sydney are undergoing an extreme marine heatwave with temperatures likely at their highest levels on record for January. Satellite data is showing the ocean surface off the coast of Sydney at 3C above normal, with swimmers and surfers reporting conditions that feel more like […]

Risk levels for climate-sensitive health outcomes based on different greenhouse gas emissions and adaptation scenarios. Graphic: IPCC WG 2 Sixth Assessment Report / AFP

June 23, 2021

Hunger, drought, disease: UN climate report reveals dire health threats – “The basis for our health is sustained by three pillars: the food we eat, access to water, and shelter. These pillars are totally vulnerable and about to collapse.”

By Patrick Galey 23 June 2021 (AFP) – Hunger, drought and disease will afflict tens of millions more people within decades, according to a draft UN assessment that lays bare the dire human health consequences of a warming planet. After a pandemic year that saw the world turned on its head, a forthcoming report by […]

Overall state of all natural World Heritage sites in 2014, 2017, and 2020. Graphic: IUCN

December 7, 2020

Climate change now top threat to natural World Heritage sites – Great Barrier Reef declines to “critical” status

GLAND, SWITZERLAND, 2 December 2020 (IUCN) – Climate change is now the biggest threat to natural World Heritage, according to a report [pdf] published today by IUCN (International Union for Conservation of Nature). A third (33%) of natural World Heritage sites are threatened by climate change, including the world’s largest coral reef, the Great Barrier […]