On 1-2 December, there is a workshop at the
@oeai_oeaw in Vienna on absolute
#chronologies in the
#BronzeAge.
#ClusterROOTS member Paul Duffy will give a talk on 1 Dec about "What happened during the Middle to Late Bronze Age transition in Eastern
#Hungary?". The whole workshop can be seen virtually and anyone interested can join. More Information:
https://www.oeaw.ac.at/en/oeai/events/event-detail/absolute-chronologies-of-the-european-middle-and-late-bronze-ages-challenges-and-perspectives@archaeodons #archaeology
Absolute Chronologies of the European Middle and Late Bronze Ages
Workshop | Vienna
"Some blue oak
#chronologies are highly correlated with
#water year
#precipitation (r = 0.84) but are equally well correlated (r = 0.82) with heavy precipitation totals ≥25.4 mm (one inch, ≈95th percentile of daily totals, 1949-2004)."
https://journals.ametsoc.org/view/journals/hydr/aop/JHM-D-22-0062.1/JHM-D-22-0062.1.xml
A 440-Year Reconstruction of Heavy Precipitation in California from Blue Oak Tree Rings*
Abstract The variability of water year precipitation and selected blue oak tree-ring chronologies in California are both dominated by heavy precipitation delivered during just a few days each year. These heavy precipitation events can spell the difference between surplus or deficit water supply, and elevated flood risk. Some blue oak chronologies are highly correlated with water year precipitation (r = 0.84) but are equally well correlated (r = 0.82) with heavy precipitation totals ≥25.4 mm (one inch, ≈95th percentile of daily totals, 1949-2004). The blue oak correlation with non-heavy daily totals is much weaker (<25.4 mm; r = 0.55). Consequently, some blue oak chronologies represent selective proxies for the temporal and spatial variability of heavy precipitation totals and are used to reconstruct the amount and number of days with heavy precipitation in northern California from 1582-2021. Instrumental and reconstructed heavy precipitation totals are strongly correlated with gridded atmospheric river related precipitation over the western United States, especially in central California. Spectral analysis indicates that instrumental heavy precipitation totals may be dominated by high frequency variability and the non-heavy totals by low frequency variance. The reconstruction of heavy precipitation is coherent with instrumental heavy totals across the frequency domain and include concentrations of variance at ENSO and biennial frequencies. Return period analyses calculated using instrumental heavy precipitation totals are representative of the return periods in the blue oak reconstruction despite the large differences in series length. Decadal surges in the amount, frequency, and inter-annual volatility of heavy precipitation totals are reconstructed, likely reflecting episodes of elevated atmospheric river activity in the past.
"Some blue oak
#chronologies are highly correlated with
#water year
#precipitation (r = 0.84) but are equally well correlated (r = 0.82) with heavy precipitation totals ≥25.4 mm (one inch, ≈95th percentile of daily totals, 1949-2004). "
https://journals.ametsoc.org/view/journals/hydr/aop/JHM-D-22-0062.1/JHM-D-22-0062.1.xmlA 440-Year Reconstruction of Heavy Precipitation in California from Blue Oak Tree Rings*
Abstract The variability of water year precipitation and selected blue oak tree-ring chronologies in California are both dominated by heavy precipitation delivered during just a few days each year. These heavy precipitation events can spell the difference between surplus or deficit water supply, and elevated flood risk. Some blue oak chronologies are highly correlated with water year precipitation (r = 0.84) but are equally well correlated (r = 0.82) with heavy precipitation totals ≥25.4 mm (one inch, ≈95th percentile of daily totals, 1949-2004). The blue oak correlation with non-heavy daily totals is much weaker (<25.4 mm; r = 0.55). Consequently, some blue oak chronologies represent selective proxies for the temporal and spatial variability of heavy precipitation totals and are used to reconstruct the amount and number of days with heavy precipitation in northern California from 1582-2021. Instrumental and reconstructed heavy precipitation totals are strongly correlated with gridded atmospheric river related precipitation over the western United States, especially in central California. Spectral analysis indicates that instrumental heavy precipitation totals may be dominated by high frequency variability and the non-heavy totals by low frequency variance. The reconstruction of heavy precipitation is coherent with instrumental heavy totals across the frequency domain and include concentrations of variance at ENSO and biennial frequencies. Return period analyses calculated using instrumental heavy precipitation totals are representative of the return periods in the blue oak reconstruction despite the large differences in series length. Decadal surges in the amount, frequency, and inter-annual volatility of heavy precipitation totals are reconstructed, likely reflecting episodes of elevated atmospheric river activity in the past.
[ 🔄 Partagé via Fedilab ]
@ysabeau 🔗 https://mastodon.zaclys.com/users/ysabeau/statuses/109280492689956329
-
Si toi aussi tu as toujours faire des #chronologies verticales sans te casser la tête dans #Writer de #LibreOffice, ce #tutoriel est pour toi. Notons que ça peut servir aussi à d'autres choses.
C'est simple à mettre en œuvre, ça ne demande que de la précision et ça permet d'avoir des documents évolutifs au besoin.
Les fichiers cobayes sont en vrai texte et téléchargeables.
Bref, c'est là :
https://dutailly.net/de-l-art-de-la-chronologie-verticale
Attached: 1 image
Si toi aussi tu as toujours faire des #chronologies verticales sans te casser la tête dans #Writer de #LibreOffice, ce #tutoriel est pour toi. Notons que ça peut servir aussi à d'autres choses.
C'est simple à mettre en œuvre, ça ne demande que de la précision et ça permet d'avoir des documents évolutifs au besoin.
Les fichiers cobayes sont en vrai texte et téléchargeables.
Bref, c'est là :
https://dutailly.net/de-l-art-de-la-chronologie-verticale
Ranjani Ramkumar
Cluster ROOTS
Victor
Victor
Poujol 𝖱𝗈𝗌𝗍 ✅