Peng Jianfeng, Li Jinbao, Li Xuan, Cui Jiayue, Peng Meng
College of Geography and Environmental Science, Henan University, Kaifeng 475004, China.
Henan Key Laboratory of Earth System Observation and Modeling, Henan University, Kaifeng 475004, China.
Biology (Basel). 2022 May 15;11(5):753. doi: 10.3390/biology11050753.
Tree ring data from the southern boundary of Chinese Pine ( Carr.) distribution where is the southern warm temperate margin, the paper analyzes the response of climate factors along north-south direction to tree growth. The results show that temperature and precipitation in May-June and relative moisture from March to June are main limiting factors on trees growth; however, the temperature in the south of the mountains and the moisture in the north of the mountains have relatively greater influence on trees' growth. Additionally, we also found that the regional scPDSI (that is scPDSI in May-June) was the most significant and stable factor limiting tree growth to be used for reconstruction. The reconstructed scPDSI revealed that there were 29 extremely dry years and 30 extremely wet years during 1801-2016, and it could represent the drought variation in central and eastern monsoon region. The variation exists in good agreement with the reconstructed PDSI for Mt. Shennong and the drought/wetness series in Zhengzhou. Further research found that the droughts of May-June in central China were mainly impacted by local temperature and moisture (including precipitation, soil moisture, potential evaporation and water pressure), and then by the northern Pacific Ocean and the northern Atlantic Ocean. These results may provide better understanding of May-June drought variation and service for agricultural production in central China.
利用位于南温带边缘的油松（Carr.）分布南界的树木年轮数据，分析了气候因子沿南北方向对树木生长的响应。结果表明，5-6月的温度和降水量以及3-6月的相对湿度是树木生长的主要限制因素；然而，山南部的温度和山北部的湿度对树木生长的影响相对较大。此外，我们还发现区域标准化降水蒸散指数（即5-6月的标准化降水蒸散指数）是限制树木生长用于重建的最显著和稳定的因素。重建的标准化降水蒸散指数显示，在1801-2016年期间有29个极端干旱年份和30个极端湿润年份，并且它能够代表中部和东部季风区的干旱变化。这种变化与神农架重建的标准化降水蒸散指数以及郑州的干湿序列存在很好的一致性。进一步研究发现，中国中部5-6月的干旱主要受当地温度和湿度（包括降水量、土壤湿度、潜在蒸发和水压）的影响，其次受北太平洋和北大西洋的影响。这些结果可能有助于更好地理解中国中部5-6月的干旱变化，并为中部地区的农业生产提供服务。
