I use this chart as template for when I want to see a particular proxy for #paleoclimate in the bigger context of Earth's #climate factors. Because I add many and varying #proxy records to this template, they need to fit either y-axes. So all records get re-scaled. The individual formula is given in brackets () in the legend, eg., (*10000, /20, +2).
The x-axis is kiloyear ky before present BP (BP is 1950), data resolution is in centuries.
The background of the chart is always the #Milankovic cycles: #Eccentricity as black area, #obliquity / tilt in pink and climatic #precession favoring North in gold and favoring South in darker rosé.
Standard curves are CO2 (gray), CH4 (dark magenta), and sealevel (light blue). CO2 and CH4 are at home on the left y-axis, by the way. Virtually all other proxies end up to be at home on the right hand y-axis.
When I add a proxy from the Southern hemisphere, I usually choose a red-ish colour, and gold-ish for proxies from the NH. Exception to the rule is the tropical South American glacier index "TEG" in white.
Sources for the standard items in this chart are:
- #Milankovic cycles from Laskar 2004 / 2010 http://vo.imcce.fr/insola/earth/online/earth/online/index.php
- #SeaLevel (light blue) from Miller 2020 https://www.science.org/doi/full/10.1126/sciadv.aaz1346
- #CH4 #methane (dark magenta) from Loulergue 2008 https://www.ncei.noaa.gov/access/paleo-search/study/6093
- #CO2 (gray) from M. Yamamoto 2020 https://www.ncei.noaa.gov/access/paleo-search/study/34052
Non-standard proxies in this version for the #tegtmeier thread on modern humans :
- #d18O (magenta) for sea surface temperature in the South Atlantic from Starr 2020 (published January 2021) https://www.nature.com/articles/s41586-020-03094-7
- #Glacier index TEG (white) from Rodbell 2020 https://www.nature.com/articles/s41586-022-04873-0
- ºC in subtropical Africa from Chevalier 2021 https://pubs.geoscienceworld.org/gsa/geology/article/49/1/71/590736/Temperature-change-in-subtropical-southeastern
I use #LibreOffice #Calc.
#TegtmeierBasics