Here's[1] the IPCC report from 2001. Which predictions do you consider "far off the mark"?
I only checked a few like
- CO2 level, predicted 490-1250 by 2100, 420 in 2020[2].
- Glacier ice loss, projected widespread retreat, recent measurements seems to agree[3]
- Temperature rise, predicted increase of 0.4C-1.1C for 1990-2025, measurements for 2001-2010[4] was +0.56C and 2011-2020[5] shows +0.82C.
- Sea level rise, predicted rise in period 1990-2025 of 0.03-0.14m, status as of 2020 is 0.09m above 1990 levels[6].
These seems to hold up pretty good as far as I can see, maybe even conservative, unless I'm missing something?
[1]: https://www.ipcc.ch/report/ar3/syr/
[2]: https://www.climate.gov/news-features/understanding-climate/...
[3]: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019...
[4]: https://www.ncdc.noaa.gov/sotc/global/201013
[5]: https://www.ncdc.noaa.gov/sotc/global/202013
[6]: https://podaac.jpl.nasa.gov/DataAction-2020-11-19-Globally-a...