Yakushima Island, Japan
Reference
Kitagawa, H. and Matsumoto, E. 1995. Climatic implications of δ13C variations in a Japanese cedar (Cryptomeria japonica) during the last two millennia. Geophysical Research Letters 22: 2155-2158.
Description
The authors analyzed δ13C variations of Japanese cedars growing on Yakushima Island, southern Japan (30°20'N, 130°30'E), in an effort to reconstruct a high-resolution proxy temperature record over the past two thousand years.
The Medieval Warm Period occurred between AD 800-1250 and from the authors' Figure 3, peak warmth during this time was about 1°C above that of the Current Warm Period.
Qui il current sembra intendere gli anni '70, a giudicare dal grafico.
E comunque, mi sembra d'aver capito che stai facendo una collezione di grafici che tenderebbero a dimostrare che nel periodo di ottimo medievale facesse più caldo di oggi. Grafici tra l'altro piuttosto differenti tra loro.
Può anche essere, ma diamo tempo alla temperatura di cumularsi qualche decennio, e vediamo un po' come regisce la temperatura del mare, l'albedo e via discorrendo.
Maurizio
Rome, Italy
41:53:22N, 12:29:53E
Lake Nakatsuna, Japan
Reference
Adhikari, D.P. and Kumon, F. 2001. Climatic changes during the past 1300 years as deduced from the sediments of Lake Nakatsuna, central Japan. Limnology 2: 157-168.
Description
Sediment cores from Lake Nakatsuna in central Japan (36°30'N, 137°51'E) were analyzed for total organic carbon, total nitrogen and sand content to produce a proxy record of climate for this region over the past 1300 years.
The MWP was identified by the authors as an interval between 900 and 1200 AD that was "warmer than any other period during the last 1300 years."
Lake Teletskoye, Altai Mountains of Southern Siberia
Reference
Kalugin, I., Selegei, V., Goldberg, E. and Seret, G. 2005. Rhythmic fine-grained sediment deposition in Lake Teletskoye, Altai, Siberia, in relation to regional climate change. Quaternary International 136: 5-13.
Description
Sediment cores from Lake Teletskoye in the Altai Mountains of Southern Siberia (51°42.90'N, 87°39.50'E) were analyzed to produce a multi-proxy climate record spanning the past 800 years.
The Medieval Warm Period was identifed as a climatic period evidenced between the start of the authors' record in 1210 AD and ending around 1480 AD that was "warmer and more humid than today."
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questo lo capisco meglio
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bellino...
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toh, c'ho trovato anche un lavoro di Giraudi che ho....
Reference
Giraudi, C. 2005. Middle to Late Holocene glacial variations, periglacial processes and alluvial sedimentation on the higher Apennine massifs (Italy). Quaternary Research 64: 176-184. Description
Based on current relationships between elevation and soil periglacial and glacial processes, Giraudi estimated that the mean annual temperature on higher Apennine massifs in Italy (42°23'N, 13°31'E) from approximately AD 700 to 1030 were "higher than at present," and that winter temperatures were "at least 0.9°C higher" than those of today.
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