1860—1898年北京沙尘天气初探

A Preliminary Investigation on the Dusty Days in Beijing over 1860—1898 A.D.

《翁同日记》较为完整地记载了北京1860—1898年沙尘天气情况.通过整理《翁同日记》1860—1898年北京沙尘天气资料,初步建立了1860—1898年北京年沙尘日数和春季(3～5月)沙尘日数序列.1860—1898年北京年沙尘日数平均值为11d左右,春季沙尘日数平均值为7d左右.1860—1898年北京沙尘天气以春季最频繁,最频繁的月份是4月.

The Diary of Weng Tonghe is found to be a unique and very substantial historical document, which provides contemporary reports of dust storms in Beijing over 1860—1898 A.D. After collating and examining these entries scattered through the book, what emerges is a body of records of dusty days in Beijing at that time. Accordingly, the time series of the annual and Mar.～May number of dusty days in Beijing over 1860—1898 A.D are reconstructed. The average annual and Mar.-May number of dusty days in Beijing during 1860—1898 AD are about 11 days and 7days respectively. Both of them seem to be a little lower than those at the present. However, the monthly distribution of the dusty days in Beijing agrees well with that at the present. The season and month with the highest number of dusty days are spring (March～May) and April, respectively.