霸王(Sarcozygium xanthoxylon)灌木年轮记录的1902-2015年阿拉善荒漠中部气候干湿变化

doi:10.7522/j.issn.1000-694X.2017.00100

摘要/Abstract

摘要： 基于阿拉善荒漠中部的4个霸王（Sarcozygium xanthoxylon）样点建立的区域轮宽年表，探讨了霸王径向生长对气候变化的响应及阿拉善荒漠中部区域1902-2015年的干湿变化。结果表明：霸王的径向生长主要受到生长季及前期降水（当年4-7月和前一年10-12月降水）影响。年代际尺度上，区域年表共记录了1920s初-1930s初、1940s初以及1970s末-1980s末3个干旱时段和1900s末-1920s初、1930s、1960s中-1970s中以及1980s末-至今4个湿润时段。区域气候干湿变化以2~8、11、16~32 a周期最为明显，在1970s末发生了周期性震荡。本研究所揭示的区域百余年来气候干湿变化波动状况，可为区域环境演变和荒漠化防治提供气候背景代用资料和决策依据。

关键词: 阿拉善荒漠, 灌木年轮, 霸王(Sarcozygium xanthoxylon), 气候响应, 干湿变化

Abstract: Based on the regional chronology established by the four ring-width standard chronologies of Sarcozygium xanthoxylon in the middle of Alashan Desert, we studied the response of Sarcozygium xanthoxylon radial growth to climate change and the wet/dry variation recorded by regional chronology. The results showed that the radial growth of Sarcozygium xanthoxylon was mainly affected by the pre-growing and growing season precipitation (October-December in previous year and April-July in current year). On the interdecadal scale, three dry periods were identified in the middle of Alashan Desert:the early 1920s to early 1930s, the early 1940s, the late 1970s to late 1980s; Four wet periods were the late 1900s to early 1920s, 1930s, the mid-1960s to mid-1970s, the late 1980s to the present. According to the results of wavelet analysis, the regional chronology in the middle of Alashan Desert had significant period cycles of 2-8 a, 11 a and 16-34 a, and the periodic oscillation occurred at the end of 1970s. These results could provide climate change information and decision-making basis for regional environmental evolution and desertification control.

Key words: Alashan Desert, shrub tree-rings, Sarcozygium xanthoxylon, climate response, wet/dry variation

中图分类号:

P467

丁爱军, 肖生春, 彭小梅, 田全彦. 霸王(Sarcozygium xanthoxylon)灌木年轮记录的1902-2015年阿拉善荒漠中部气候干湿变化[J]. 中国沙漠, 2018, 38(2): 401-409.

Ding Aijun, Xiao Shengchun, Peng Xiaomei, Tian Quanyan. Wet/dry Variation Recorded by Sarcozygium xanthoxylon Tree-rings in the Middle of Alashan Desert, China[J]. JOURNAL OF DESERT RESEARCH, 2018, 38(2): 401-409.

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