What is it about?
we present a tree-ring d18O based drought reconstruction (1710-2010) for East Central Asia. We find the 20th century to be a pluvial in East Central Asia that is linked to a strengthening of the westerly circulation. We further find that past drought impacted the decline of the Zhungar Empire, whereas a late 18th century pluvial was linked to increased migration into East Central Asia.
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Why is it important?
The low-frequency and variability of drought in the central Asia were assessed based on the tree-ring stable isotope proxies. The data showed that the region experienced a wetting trend since the 1870s, which was related the strengthened westerly circulation. The 20th century is wet but it is dry in recent. Past drought and wet affected the agricultural activities such as planting and grazing. The drought impacted the decline of the Zhungar Empire in Qing dynasty. The wet periods associated the immigration and development in the region.
Perspectives
This research will provide some views to link the climate change, ecological change, social activity, and historical events. The climate in the central Asia was affected by the westerly circulations. To understand the social activity should be considering the climate change.
Dr Guobao Xu
Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences
Read the Original
This page is a summary of: Regional drought shifts (1710–2010) in East Central Asia and linkages with atmospheric circulation recorded in tree-ring δ18O, Climate Dynamics, April 2018, Springer Science + Business Media,
DOI: 10.1007/s00382-018-4215-2.
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