Onarheim et
2018 Onarheim I., Eldevik T., Smedsrud L.H. & Stroeve J.C.
Seasonal and Regional Manifestation of Arctic Sea Ice Loss
, Journal in Climate, March,2018, 4917-4932, 2018.
doi:10.1175/JCLI-D-17-0427.1
Stern Harry L. Regime Shift in Arctic Ocean Sea‐Ice Extent,
GRL, 52:8, 2025.
https://doi.org/10.1029/2024GL114546
Walsh J.E. & Johnson C.M. An Analysis of Arctic Sea Ice Fluctuations,
1953–77, Journal of Physical Oceanography, 9:3, 580-591, 1979
https://doi.org/10.1175/1520-0485(1979)009<0580:AAOASI>2.0.CO;2
Sites:
https://nsidc.org/learn/ask-scientist/what-difference-between-sea-ice-area-and-extent
https://joannenova.com.au/2025/08/600-billion-tons-of-carbon-emissions-and-arctic-sea-ice-has-stayed-the-same-for-20-years/
https://rclutz.com/2025/08/23/surplus-arctic-ice-late-august-2025/
https://wattsupwiththat.com/2025/08/13/new-study-no-decline-in-arctic-sea-ice-extent-no-long-term-trend-since-2007/
https://dailysceptic.org/2025/05/15/daily-mail-misses-the-real-story-about-long-term-stable-antarctica-ice-in-dumb-quip-about-climate-deniers/
Belivers ...:
https://www.carbonbrief.org/guest-post-why-the-recent-slowdown-in-arctic-sea-ice-loss-is-only-temporary/
https://grist.org/climate/antarctica-is-in-extreme-peril/
(Self-defined as: Grist, climate journalism you can trust.)
| Plots, Figures |
| 00readme.txt |
| Onarheim et al., 2018 fig. 3 |
(png) | Extent 1950-2013 |
| Walsh & Johnson 1979 fig. 5 |
(png) | Seaice area anomaly |
| Walsh & Johnson 1979 fig. 7 |
(png) | Spectrum of the above |
| Wang25-fig2a |
(png) | Rebound in SH ice |
| | |
| NH Ice Extent Months | (pdf)
(png) | & Annual Average |
| NH Ice Area Months | (pdf)
(png) | & Annual Average |
| SH Ice Extent Months | (pdf)
(png) | & Annual Average |
| SH IceArea Months | (pdf)
(png) | & Annual Average |
| Month-by-Month Extent | (pdf)
(png) | March to March
(stat-new.bon) |
| | | |
| NH Ext/Area Anomaly | (pdf)
(png) | Monthly anomalies |
| Lomb Spectrum of the above | (pdf)
(png) | |
| Lomb Spectrum, no
detrend | (pdf)
(png) | Only
for comparison |
| Fit 2009-end of Anomalies | (pdf)
(png) | |
| | | |
| SH Ext/Area Anomaly | (pdf)
(png) | Monthly anomalies |
| Lomb Spectrum of the above | (pdf)
(png) | |
| Fit 2009-end of Anomalies | (pdf)
(png) | |
| NH & SH Spectra | (pdf)
(png) | |
| ---- | ---- | ----- |
| Data | | |
| Original Excel Monthly | (xlsx) | https://nsidc.org/sea-ice-today/sea-ice-tools |
| Original Excel Annual | (xlsx) | https://nsidc.org/sea-ice-today/sea-ice-tools |
| NH SeaIce, monthly | (txt) | Extent & Area, NH |
| SH SeaIce, monthly | (txt) | Extent & Area, SH |
| NH SeaIce Extent | (txt) | Annual |
| NH SeaIce Area | (txt) | Annual |
| SH SeaIce Extent | (txt) | Annual |
| SH SeaIce Area | (txt) | Annual |
| STAT 5-years Extent | (out) | any month 3-to-12 |
| Month-by-Month Extent | (out) | from 1979-83 to 2019-23 |
| | | |
| NH Ext/Area Anomaly | (txt) | Base: 1979-2008, monthly values |
| NH Area LOMB | (out) | |
| NH Extent LOMB | (out) | |
| NH Area LOMB, no detrend |
(out) | Only for comparison |
| NH Extent LOMB, no detrend |
(out) | Only for comparison |
| NH Fit 2009-2025 | (app) | Fit parameters |
| | | |
| SH Ext/Area Anomaly | (txt) | Base: 1979-2008, monthly values |
| SH Area LOMB | (out) | |
| SH Extent LOMB | (out) | |
| SH Fit 2009-2025 | (app) | Fit parameters |
Code
seaice25e.bon,
seaice25a.bon,
shice25e.bon,
shice25a.bon,
stat-new.bon,
seaice-anom.bon,
nh-lomb.bon
nh2-lomb.bon,
shice-anom.bon,
sh-lomb.bon
detrenda.bmr,
detrende.bmr,
detrendas.bmr,
detrendes.bmr,
linea.f,
anom.f,
(llinea,
lanom)
lineas.f,
anoms.f,
(llineas,
lanoms)
Page Written: Tuesday,
August 26, 2025,
Last Updated:
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