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ClimateQuiet 12d · day 12

Niño 3.4 sea-surface temperature anomaly hits record 4.03 standard deviations above mean

A preliminary reading shows the tropical Pacific benchmark region running hotter than any year on record, breaking the 3-standard-deviation threshold for the first time.

newest coverage 11d agosummary written 11d ago2 pieces1.1k likes & upvotes26 comments BlueskyMastodon

What to know

  • A preliminary Niño 3.4 sea-surface temperature reading of 2.98°C above the 1991-2020 baseline equates to 4.03 standard deviations above the mean — a level no previous year has reached.
  • The figure was first publicized by climate data analyst Eliot Jacobson and quickly spread across climate-focused social media accounts.
  • The reading is preliminary; confirmation from standard climate monitoring bodies (e.g., NOAA) is not yet reflected in the available material.

Eliot Jacobson Climate data analyst / professor

Niño 3.4 sea-surface temperature anomaly hits record 4.03 standard deviations above mean
bsky.app

How it unfolded 2 developments, newest first · click a bar or a number to jump posts

Peak 2 pieces in 3h at Sep 12, 10 AM; 2 pieces over 12 days (2 posts) Sep 12, 10 AM — 2 pieces · 2 posts — Bluesky 1, Mastodon 1Sep 12, 1 PM — quietSep 12, 4 PM — quietSep 12, 7 PM — quietSep 12, 10 PM — quietSep 13, 1 AM — quietSep 13, 4 AM — quietSep 13, 7 AM — quietSep 13, 10 AM — quietSep 13, 1 PM — quietSep 13, 4 PM — quietSep 13, 7 PM — quietSep 13, 10 PM — quietSep 14, 1 AM — quietSep 14, 4 AM — quietSep 14, 7 AM — quietSep 14, 10 AM — quietSep 14, 1 PM — quietSep 14, 4 PM — quietSep 14, 7 PM — quietSep 14, 10 PM — quietSep 15, 1 AM — quietSep 15, 4 AM — quietSep 15, 7 AM — quietSep 15, 10 AM — quietSep 15, 1 PM — quietSep 15, 4 PM — quietSep 15, 7 PM — quietSep 15, 10 PM — quietSep 16, 1 AM — quietSep 16, 4 AM — quietSep 16, 7 AM — quietSep 16, 10 AM — quietSep 16, 1 PM — quietSep 16, 4 PM — quietSep 16, 7 PM — quietSep 16, 10 PM — quietSep 17, 1 AM — quietSep 17, 4 AM — quietSep 17, 7 AM — quietSep 17, 10 AM — quietSep 17, 1 PM — quietSep 17, 4 PM — quietSep 17, 7 PM — quietSep 17, 10 PM — quietSep 18, 1 AM — quietSep 18, 4 AM — quietSep 18, 7 AM — quietSep 18, 10 AM — quietSep 18, 1 PM — quietSep 18, 4 PM — quietSep 18, 7 PM — quietSep 18, 10 PM — quietSep 19, 1 AM — quietSep 19, 4 AM — quietSep 19, 7 AM — quietSep 19, 10 AM — quietSep 19, 1 PM — quietSep 19, 4 PM — quietSep 19, 7 PM — quietSep 19, 10 PM — quietSep 20, 1 AM — quietSep 20, 4 AM — quietSep 20, 7 AM — quietSep 20, 10 AM — quietSep 20, 1 PM — quietSep 20, 4 PM — quietSep 20, 7 PM — quietSep 20, 10 PM — quietSep 21, 1 AM — quietSep 21, 4 AM — quietSep 21, 7 AM — quietSep 21, 10 AM — quietSep 21, 1 PM — quietSep 21, 4 PM — quietSep 21, 7 PM — quietSep 21, 10 PM — quietSep 22, 1 AM — quietSep 22, 4 AM — quietSep 22, 7 AM — quietSep 22, 10 AM — quietSep 22, 1 PM — quietSep 22, 4 PM — quietSep 22, 7 PM — quietSep 22, 10 PM — quietYesterday, 1 AM — quietYesterday, 4 AM — quietYesterday, 7 AM — quietYesterday, 10 AM — quietYesterday, 1 PM — quietYesterday, 4 PM — quietYesterday, 7 PM — quietYesterday, 10 PM — quietToday, 1 AM — quietToday, 4 AM — quiet 1–2
Sep 13Sep 14Sep 15Sep 16Sep 17Sep 18Sep 19Sep 20Sep 21Sep 22now · 5:47 AM ET
  1. 2

    Mastodon users amplify the SST alert with climate hashtags

    The post was reshared on Mastodon under a raft of climate-related hashtags, extending its reach beyond Bluesky.

    “Okay, up a notch. via prof #EliotJacobson #SST #FeverChart update 11.09.2026 Anyone in the back rows? 📣 2.98°C - 4.03 STD ABOVE MEAN…”
    — IviChoc@mastodon.online
    • IviChoc@mastodon.online

      Okay, up a notch. via prof # EliotJacobson # SST # FeverChart update 11.09.2026 Anyone in the back rows? 📣 2.98°C - 4.03 STD ABOVE MEAN https:// bsky.app/profile/climatecasino .net/post/3mvdfdd736c2y # ClimateScience # climatechange # ClimateEmergency # ClimateCrisis # ClimateBreakdown # ClimateDisruption # globalWarming # globalHeating #…

      IviChoc@mastodon.onlineMastodon11d ago2▲view on Mastodon ↗
  2. 1

    Eliot Jacobson flags the reading as a "y-Axis Alert"

    Prof. Eliot Jacobson posted the preliminary figure on Bluesky, framing it as a notable statistical outlier in the sea-surface temperature record.

    “Breaking News! Code: y-Axis Alert! On September 11th, the preliminary Nino 3.4 sea-surface temperature measured 2.98°C above the 1991-2020 mean, which was 4.03 standard deviations above the mean. No previous year has broken 3SD.”
    — Prof. Eliot Jacobson
    • climatecasino.net

      Breaking News! Code: y-Axis Alert! On September 11th, the preliminary Nino 3.4 sea-surface temperature measured 2.98°C above the 1991-2020 mean, which was 4.03 standard deviations above the mean. No previous year has broken 3SD. The Climate 8-ball is feeling oblong.

      climatecasino.netBluesky11d ago1.1k▲view on Bluesky ↗
  3. background

    Niño 3.4 SST anomaly measured at 2.98°C above mean — Preliminary data showed the Niño 3.4 sea-surface temperature running 2.98°C above the 1991-2020 baseline, or 4.03 standard deviations above the mean, the first time any year has exceeded 3 standard deviations.

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