Hydraulic despotism still haunts the Nile- CH4 generated by anaerobic fermentation of organic sediments trapped in Lake Nasser by the Aswan dam reportedly accounts for half of Egypt's greenhouse forcing footprint.
On Wednesday, October 18, 2017 at 3:17:38 AM UTC-4, Andrew Lockley wrote: > > Poster's note : I don't share much volcanic impact material but this is > fascinating > > https://www.nature.com/articles/s41467-017-00957-y > > Volcanic suppression of Nile summer flooding triggers revolt and > constrains interstate conflict in ancient Egypt > > - Joseph G. Manning > <https://www.nature.com/articles/s41467-017-00957-y#auth-1>, > - Francis Ludlow > <https://www.nature.com/articles/s41467-017-00957-y#auth-2>, > - […] > - Jennifer R. Marlon > <https://www.nature.com/articles/s41467-017-00957-y#auth-6> > > > - *Nature Communications* 8, Article number: 900(2017) > - doi:10.1038/s41467-017-00957-y > - Download Citation > <https://www.nature.com/articles/s41467-017-00957-y.ris> > - > - Climate-change adaptation > <https://www.nature.com/subjects/climate-change-adaptation> > - Climate-change impacts > <https://www.nature.com/subjects/climate-change-impacts> > - History <https://www.nature.com/subjects/history> > - Hydrology <https://www.nature.com/subjects/hydrology> > - Natural hazards <https://www.nature.com/subjects/natural-hazards> > > Received:10 November 2016Accepted:08 August 2017Published online:17 > October 2017 > > > Abstract > > Volcanic eruptions provide tests of human and natural system sensitivity > to abrupt shocks because their repeated occurrence allows the > identification of systematic relationships in the presence of random > variability. Here we show a suppression of Nile summer flooding via the > radiative and dynamical impacts of explosive volcanism on the African > monsoon, using climate model output, ice-core-based volcanic forcing data, > Nilometer measurements, and ancient Egyptian writings. We then examine the > response of Ptolemaic Egypt (305–30 BCE), one of the best-documented > ancient superpowers, to volcanically induced Nile suppression. Eruptions > are associated with revolt onset against elite rule, and the cessation of > Ptolemaic state warfare with their great rival, the Seleukid Empire. > Eruptions are also followed by socioeconomic stress with increased > hereditary land sales, and the issuance of priestly decrees to reinforce > elite authority. Ptolemaic vulnerability to volcanic eruptions offers a > caution for all monsoon-dependent agricultural regions, presently including > 70% of world population > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
