This study presents a scheme for delimiting the meiyu period in the Lower Changjiang (Yangtze) region. This scheme was applied to the Clear and Rain Records of Nanjing, Suzhou and Hangzhou to reconstruct the 1723-1800...This study presents a scheme for delimiting the meiyu period in the Lower Changjiang (Yangtze) region. This scheme was applied to the Clear and Rain Records of Nanjing, Suzhou and Hangzhou to reconstruct the 1723-1800 meiyu climate series. The beginning and ending dates, length, precipitation, and the intensity grades of meiyu were determined. The years of early, heavy, light, and empty meiyu were also given. Statistical analyses of the 18th century meiyu series indicate the existence of the quasi-periodicities of 2-3, 4-5, and 9 years. Many basic characteristics of the modern meiyu also existed in the 18th century. Some characteristics of the Northwest Pacific Subtropical High in the 18th century in typical meiyu years were inferred from the historical meiyu series.展开更多
In this study the Qing weather records 'Clear and Rain Records' were used to reconstruct the 18th century summer (June-August) precipitation and monthly precipitation series of May, June, July, and August. The...In this study the Qing weather records 'Clear and Rain Records' were used to reconstruct the 18th century summer (June-August) precipitation and monthly precipitation series of May, June, July, and August. The nature of these records and the techniquc of transforming them into numerical codes are described. The procedure of converting these descriptive records into quantitative monthly precipitation and its scientific basis are given in detail. The reliability of the obtaind precipitation series is also ex- amined.展开更多
基金This work was performed under the partial support of the U.S. National Science Foundation grant ATM-8511905. It is part of U.S.-PRC cooperative research project on historical climate. The latter part of this study was also partially supported by Xi'an Lo
文摘This study presents a scheme for delimiting the meiyu period in the Lower Changjiang (Yangtze) region. This scheme was applied to the Clear and Rain Records of Nanjing, Suzhou and Hangzhou to reconstruct the 1723-1800 meiyu climate series. The beginning and ending dates, length, precipitation, and the intensity grades of meiyu were determined. The years of early, heavy, light, and empty meiyu were also given. Statistical analyses of the 18th century meiyu series indicate the existence of the quasi-periodicities of 2-3, 4-5, and 9 years. Many basic characteristics of the modern meiyu also existed in the 18th century. Some characteristics of the Northwest Pacific Subtropical High in the 18th century in typical meiyu years were inferred from the historical meiyu series.
基金supported by the U.S.National Science Foundation Climate Dynamics Section Grant ATM-8511905.
文摘In this study the Qing weather records 'Clear and Rain Records' were used to reconstruct the 18th century summer (June-August) precipitation and monthly precipitation series of May, June, July, and August. The nature of these records and the techniquc of transforming them into numerical codes are described. The procedure of converting these descriptive records into quantitative monthly precipitation and its scientific basis are given in detail. The reliability of the obtaind precipitation series is also ex- amined.
