NOAA – Page 3 – Desdemona Despair

Changes in global average sea level (background map) and local sea level (dots) between 1993 and 2021. In the global ocean, sea level has risen nearly everywhere (blue). Coastal areas where sea level has fallen (brown) are places where the land is rising as it rebounds from being compressed by ice sheets and glaciers during the last ice age. NOAA Climate.gov map, based on data from University of Hawaii Sea Level Center. Graphic: NOAA

September 4, 2022

American Meteorological Society report: Record-high greenhouse gases and sea levels in 2021 – Ocean heat content highest on record

31 August 2022 (NOAA) – Greenhouse gas concentrations, global sea levels and ocean heat content reached record highs in 2021, according to the 32nd annual State of the Climate report. The international annual review of the world’s climate, led by scientists from NOAA’s National Centers for Environmental Information and published by the Bulletin of the […]

Departure of temperature from average for July 2022, the sixth-warmest July for the globe since record-keeping began in 1880, according to NOAA. Record-warmest areas included parts of southern Europe and northern Africa, southern and eastern Asia, Brazil, Oceania, and southern Texas/northern Mexico. No large areas experienced record cold. Graphic: NOAA/NCEI

August 14, 2022

July 2022: Earth’s 6th warmest July on record

By Jeff Masters and Bob Henson 12 August 2022 (Yale Climate Connections) – July 2022 was Earth’s sixth warmest July on record since global record-keeping began in 1880, 0.87 degrees Celsius (1.57°F) above the 20th-century average, NOAA’s National Centers for Environmental Information, NCEI, reported on August 12. NASA rated the month as tied for the third warmest […]

Annual Greenhouse Gas Index (AGGI), 1700-2021. For 2021, the AGGI was a record high 1.49, representing an increase in total direct radiative forcing of 49 percent since 1990. The atmospheric abundance of CO2 has increased by an average of 1.88 ppm per year over the past 42 years (1979-2021). This increase in CO2 is accelerating — while it averaged about 1.6 ppm per year in the 1980s and 1.5 ppm per year in the 1990s, the growth rate increased to 2.4 ppm per year during the last decade (2011-2021). The annual CO2 increase from 1 January 2021 to 1 January 2022 was 2.60 ± 0.08 ppm. Graphic: Montzka, 2022 / NOAA

May 25, 2022

Greenhouse gas pollution trapped record 49 percent more heat in 2021 than in 1990 – Methane increase in 2021 largest since 1982 – “The primary gases responsible for climate change continue rising rapidly”

23 May 2022 (NOAA) – Greenhouse gas pollution caused by human activities trapped 49 percent more heat in the atmosphere in 2021 than they did in 1990, according to NOAA scientists. NOAA’s Annual Greenhouse Gas Index, known as the AGGI, tracks increases in the warming influence of human emissions of heat-trapping gases, including carbon dioxide, methane, […]

Global daily atmospheric CO2, 2012-2022. The figure shows daily averaged CO2 from four GML Atmospheric Baseline observatories; Barrow, Alaska (in blue), Mauna Loa, Hawaii (in red), American Samoa (in green), and South Pole, Antarctica (in yellow). The thick black lines represent the average of the smoothed seasonal curves and the smoothed, de-seasonalized curves for each of the records. These lines are a very good estimate of the global average levels of CO2. Data for 2022 are through 7 May 2022. Graphic: NOAA

May 8, 2022

Earth’s atmospheric CO2 hits highest recorded level in human history – Unprecedented level comes as greenhouse gas emissions continue around the world

By Ethan Freedman 6 May 2022 NEW YORK (The Independent) – Monthly average carbon dioxide (CO2) levels have reached above 420 parts per million (ppm) for the first time on record. The new data, from Hawaii’s Mauna Loa Observatory, were released by the National Oceanic and Atmospheric Administration (NOAA). Atmospheric CO2, driven higher in large part […]

Drought has reduced the water level in Lake Mead so much that Southern Nevada Water Authority's original water intake valve in Lake Mead -- in service since 1971 -- was visible above the water line in April 2022. The original intake is no longer in use since it cannot draw water. Photo: Southern Nevada Water Authority

May 7, 2022

Lake Mead plummets to record low, exposing original 1971 water intake valve – Dead man found in barrel at lake bottom, authorities say more bodies likely to turn up – “This is a crisis. This is unprecedented.”

By Stephanie Elam 29 April 2022 (CNN) – The U.S. West is in the grips of a climate change-fueled megadrought, and Lake Mead — the largest manmade reservoir in the country and a source of water for millions of people — has fallen to an unprecedented low. The lake’s plummeting water level has exposed one of the reservoir’s original water […]

Monthly mean atmospheric methane abundance, 1983-2021. The globally-averaged, monthly mean atmospheric methane abundance is determined from marine surface sites. Values for 2021 are preliminary. Graphic: NOAA Global Monitoring Laboratory

April 14, 2022

Increase in atmospheric methane set another record during 2021 – Carbon dioxide levels also record a big jump – “The evidence is consistent, alarming, and undeniable”

7 April 2022 (NOAA) – For the second year in a row, NOAA scientists observed a record annual increase in atmospheric levels of methane, a powerful, heat-trapping greenhouse gas that’s the second biggest contributor to human-caused global warming after carbon dioxide. NOAA’s preliminary analysis showed the annual increase in atmospheric methane during 2021 was 17 […]

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. […]

(a) Linear sea surface temperature (SST) trend (°C yr-1) for August of each year from 1982 to 2021. The trend is only shown for values that are statistically significant at the 95 percent confidence interval; the region is shaded gray otherwise. White shading is the August 2021 mean sea ice extent, and the yellow line indicates the median ice edge for Aug 1982-2010, (b, c) Area-averaged SST anomalies (°C) for August of each year (1982-2021) relative to the 1982-2010 August mean for (b) Baffin Bay and (c) Chukchi Sea regions shown by blue boxes in (a). The dotted lines show the linear SST anomaly trends over the period shown and trends in °C yr-1 (with 95 percent confidence intervals) are shown on the plots. Mean August SST warming trends from 1982 to 2021 persist over much of the Arctic Ocean, with statistically significant (at the 95 percent confidence interval) linear warming trends of up to +0.1°C yr-1 (a). Overall, Baffin Bay SSTs are becoming warmer in August with a linear warming trend over 1982-2021 of 0.05 ± 0.01°C yr-1 (b). Similarly, Chukchi Sea August mean SSTs are warming, with a linear trend of 0.06 ± 0.03°C yr-1 (c). Mean August SSTs for the entire Arctic (the Arctic Ocean and marginal seas north of 67° N) exhibit a linear warming trend of 0.03 ± 0.01°C yr-1. Graphic: Timmermans and Labe / NOAA

December 24, 2021

NOAA’s 2021 Arctic Report Card: Rapid and pronounced warming continues to drive the evolution of the Arctic environment

By T. A. Moon, M. L. Druckenmiller, and R. L. Thoman 6 December 2021 (NOAA) – As the influences of human-caused global warming continue to intensify, with the Arctic warming significantly faster than the globe overall, the 2021 Arctic Report Card (ARC2021) brings a broad view of the state of the Arctic climate and environment. […]

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

November 23, 2021

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) […]

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

August 16, 2021

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. […]