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STUDY ON VARIATION CHARACTERISTICS OF SST OBSERVED IN THE PAST 40 YEARS IN THE coastal REGION OF south china

Journal of Tropical Meteorology 2007年第2期13卷 177-180页

作者：潘蔚娟钱光明余克服陈特固 Guangdong Climate and Agrometeorology Center south china Sea Institute of Oceanology CMA

To study the variation characteristics of SST in coastal south china, observed SST was analyzed for the past 44 years. The results show that the monthly and yearly averaged SST have rising trends, the yearly averaged SST＇s linearity rising rate is 0.12-- 0.19 ℃/decade in the years, the rising extents in winter are higher than those in summer. The variability in winter is larger than that in summer, with the largest in February and March. A majority of significant cold or warm events occurred in winter. A wavelet multiresolution method was used to analyze periodical characteristics of SST in coastal south china, all timescale decomposition series are very similar, and high-frequency decompositions within the year are dominant. Low-frequency decompositions show rising trends since the mid-1970.

关键词： coastal south china observed SST variation characteristics

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Quartz luminescence dating of a centennial coastal foredune from Changle in Fujian Province,East china Sea

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Journal of Mountain Science 2022年第9期19卷 2601-2610页

作者： JIN Jian-hui LI Zhi-zhong LING Zhi-yong QIU Jun-jie Key Laboratory for Subtropical Resources and Environment of Fujian Province Fujian Normal UniversityFuzhou 350007China School of Geographical Sciences Fujian Normal UniversityFuzhou 350007China Qinghai Institute of Salt Lakes Chinese Academy of SciencesXi'ning 810008China

The Aeolian foredunes in the southern coast of china are records of paleoenvironmental changes for marine monsoon region. Intensive studies have been conducted to decipher their formation and paleoenvironmental implications in which chronology played a key role. However, robust dating results are still limited due to the scarcity of organic materials for radiocarbon and the limited application of quartz optically stimulated luminescence(OSL). Here, we collected 11 OSL samples and 140 grainsize samples from the Changle section with a thickness of 7 m from a coastal foredune in Fujian Province. The dating results indicated that the section spanned a time period from 0.32±0.04 ka(depth of 700 cm) to 0.18±0.02 ka(depth of 80 cm), after removal of age outliers. According to the OSL ages and sedimentary structural characteristics, the section could be divided into two stages, i.e. the stable accumulation period with an age range of 0.32-0.18 ka from the depth of 700 cm to 80 cm, and the activation period above the depth of 60 cm, at which the dune erosion was retained. The foredune development due to increased transport of dune sediment at the top part of the section was the result of recent human *** the foredunes, normal cross-bedding was generated by seasonal changes in wind *** changes in the wind direction were the primary cause for various sedimentary bedding within the dunes.

关键词： Optically stimulated luminescence Grain size Oblique foredune coastal south china

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