https://scholars.lib.ntu.edu.tw/handle/123456789/356670
標題: | Three thousand years of extreme rainfall events recorded in stalagmites from Spring Valley Caverns, Minnesota | 作者: | CHUAN-CHOU SHEN Dasgupta, Sushmita Saar, Martin O. Edwards, R.Lawrence Shen, Chuan-Chou Cheng, Hai Alexander, E.Calvin, Jr. |
關鍵字: | Cave flooding; Confocal microscopy; Extreme rainfall events; Fluorescent bands; Paleoclimate; Stalagmites | 公開日期: | 2010 | 卷: | 300 | 期: | 1-2 | 起(迄)頁: | 46-54 | 來源出版物: | Earth and Planetary Science Letters | 摘要: | Annual layer analysis in two stalagmites collected from Spring Valley Caverns, southeastern Minnesota, reveals hydrological response of the cave to extreme rainfall events in the Midwest, USA. Cave-flooding events are identified within the two samples by the presence of detrital layers composed of clay sized particles. Comparison with instrumental records of precipitation demonstrates a strong correlation between these cave-flood events and extreme rainfall observed in the Upper Mississippi Valley. A simple model is developed to assess the nature of rainfall capable of flooding the cave. The model is first calibrated to the last 50-yr (1950-1998 A.D.) instrumental record of daily precipitation data for the town of Spring Valley and verified with the first 50. yr of record from 1900 to 1949 A.D. Frequency analysis shows that these extreme flood events have increased from the last half of the nineteenth century. Comparison with other paleohydrological records shows increased occurrence of extreme rain events during periods of higher moisture availability. Our study implies that increased moisture availability in the Midwestern region, due to rise in temperature from global warming could lead to an increase in the occurrence of extreme rainfall events. © 2010 Elsevier B.V. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-78149499540&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/356670 |
DOI: | 10.1016/j.epsl.2010.09.032 | SDG/關鍵字: | Extreme flood events; Extreme rainfall; Flood event; Fluorescent bands; Frequency Analysis; Hydrological response; Minnesota; Paleoclimates; Precipitation data; Rain events; Stalagmites; Strong correlation; Upper Mississippi; Confocal microscopy; Flood control; Floods; Fluorescence; Global warming; Moisture; Rain; Caves; cave; climate change; extreme event; global warming; hydrological response; microscopy; nineteenth century; paleoclimate; precipitation (climatology); rainfall; stalagmite; Minnesota; United States |
顯示於: | 地質科學系 |
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