Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/cp-2016-122
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
13 Dec 2016
Review status
This discussion paper is a preprint. It has been under review for the journal Climate of the Past (CP). The manuscript was not accepted for further review after discussion.
Extreme drought event in AD 1637–1643 in North China: New insight from pollen records in Kaifeng City
Dexin Liu1, Jianhua Ma1,2, Lei Gu1, and Yanfang Chen1 1Institute of Natural Resources and Environment, Henan University, Kaifeng, China
2Collaborative Innovation Center on Yellow River Civilization of Henan Province, Kaifeng, China
Abstract. Long-lasting droughts usually result in water shortage and famine and even hinder the progress of human civilization. This paper presents the first study to identify the "Chong Zhen drought" event during the Late Ming Dynasty (AD 1637–1643) in a region with alluvial sediment. Using AMS14C dating, grain size and historical documents, we determined the formation age of the sediment. Pollen records at 5–7.8 m, with the highest values for mesoxerophyte and xerophyte taxa such as Chenopodiaceae, Nitraria and Ephedra pollen, were found to provide evidence for the "Chong Zhen drought" event. Other pollen percentages were almost the lowest value of the entire core. However, sediment at 5–6.7 m also had a very high value of Pinus, which was mainly caused by fluvial transport and depositional processes. Chenopodiaceae, Artemisia and Asteraceae pollen are always transported and deposited together with coarser sediment during the flood running stage, while pollen with thinner extine and air-sacs are always deposited in slow flow or hydrostatic conditions during the flood falling stage. In addition, pollen transported by wind from local and regional areas deposited on the ancient ground are always mixed with the sediment during the flood running stage with coarser until it covered by next flood. Our work helps shed light on the interpretation of the ancient vegetation and past climate based on pollen in alluvium, but it is important to make allowances for flood processes and sedimentary facies.

Citation: Liu, D., Ma, J., Gu, L., and Chen, Y.: Extreme drought event in AD 1637–1643 in North China: New insight from pollen records in Kaifeng City, Clim. Past Discuss., https://doi.org/10.5194/cp-2016-122, 2016.
Dexin Liu et al.
Dexin Liu et al.

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