NOAA: Human-caused climate change fuels warmer, wetter, stormier Arctic

Arctic annual air surface temperatures from October 2021 to September 2022 were the sixth warmest dating back to 1900. The image on the left depicts the departure from the average near-surface temperature across the Arctic during this period, with redder colors showing areas of greater than average warmth. The graphic on the right shows how the rate of Arctic air temperature warming has outpaced the rate of global warming. Data: ERA5 and NASA. Graphic: NOAA / Climate.gov

December 17, 2022

NOAA: Human-caused climate change fuels warmer, wetter, stormier Arctic

13 December 2022 (NOAA) – A typhoon, smoke from wildfires, and increasing rain are not what most imagine when thinking of the Arctic. Yet these are some of the climate-driven events included in NOAA’s 2022 Arctic Report Card, which provides a detailed picture of how warming is reshaping the once reliably frozen, snow-covered region which […]

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, […]

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 […]

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 […]

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. […]

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Tag: NOAA