5. Januar 2011

Studie aus der Hetao Region - China

Die Idsos stellen auf ihrer Website aktuell eine "neue" eklektische Studie (erschienen bereits am 26. 07. 2010) - bestehend aus 6 Proxydatensets (u.a. Pollen und Seesedimente)[1] - aus China, genauer der Hetao Region in Nordchina, vor.

Das Autorenteam um M.-Q. Li führt in besagter Studie Characteristics of cold-warm variation in the Hetao region and its surrounding areas in China during the last 5000 years (pdf-Format, ca. 10 MB; Abstract) Belege für eine MWP in den Datenerhebungsregionen an. Sie schreiben u.a. Folgendes:
1450~1000 cal yr BP: The climate was relatively warm compare with the temperature of its adjacent periods but less so than the degree of warmth at 5000 cal yr BP. This period corresponded to the Medieval Warm Period. Following are p proofs that give examples: A warming event happened in Daihai Lake in the southern part of the study region during 1.2~0.9 kyr BP (Jin et al., 2002)[2]; The Dunde ice core indicated that there was a climate warming phase during the 13th century (Yao et al., 1992)[3]; The Guliya ice core recorded a warm event in 1250~1150 cal yr BP (Yao et al., 1996)[4]; At the Chesapeake Dam, the Medieval Warm Period began at 1150 cal yr BP (Cronin TM et al., 2003)[5], which was earlier than the period began in other areas in the world.
M.-Q. Li et al., 479

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[1] Es handelt sich hierbei, nach eigenen Aussagen (cf., 476), um Proxydaten, entnommen aus nachstehenden Publikationen:
- Xu, Q. H., Xiao, J. L., Nakamura, T., et al.: Quantitative reconstructed climatic changes of Daihai Basi by pollen data, Marine Geol. Quat. Geol., 23, 99-108, 2003.
- Qian, Z. H., Kenneth, J. H., and Yuan, Z.: Kataglacial age of quaternary period and climatic characteristics of Holocene epoch -  a record of carbon isotope from Yanhaizi Ya02 borehole in Yileague of Inner Mongolia, Geol. Chem. Mineral., 24, 96-101, 2002.
- Shi, P. J. and Song, C. Q.: Palynological records of environmental changes in the middle part of Inner Mongolia, China, Chinese Sci. Bull., 48, 1433-1438, 2003.
- Xiao, J. L., Nakamura, T., Lu, H. Y., et al.: Holocene climate changes over the dessert/loess transition of north-central China, Earth Planet. Sci. Lett., 197, 11-18, 2002.
- Shen, H. Y., Jia, Y. L., Li, X. S., et al.: Environmental change inferred from distribution of Rb and Sr in different grain size fractions from lacustrine sediments in Huangqihai Lake, Inner Mongolia, Acta Geogr. Sin., 61, 1208-1217, 2006.
- Long, H., Wang, N. A., Li, Y., et al.: Mid-Holocene climate variations from lake records of the east Asian monsoon margin: a multi-proxy and geomorphological study, Quat. Sci., 27, 371-381, 2007.
[2] Jin, G. Y. and Liu, T. S.: Mid-Holocene climate change in North China, and the effect on cultural development, Chinese Sci. Bull., 47, 407-413, 2002.
[3] Yao, T. D. and Thompson, L. G.: Dunde ice core records and temperature variation in the past 5 ka, Sci. China Ser. B, 10, 1089-1093, 1992.
[4] Yao, T. D., Thompson, L. G., Qin, D. H., et al.: Variations in temperature and precipitation in the past 2000 a on the Xizang (Tibet) Plateau - Guliya ice core record, Sci. China Ser. D, 39, 425-433, 1996.
[5] Cronin, T. M., Dwyer, G. S., Kamiya, T., et al.: Medieval warm period, little ice age and 20th century temperature variability from Chesapeake Bay, Global Planet. Change, 36, 17-29, 2003.