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Remote Sensing Research Of The Modren Saline Sediment And Past Climatic Change In Luobupo During Past 2000 Years

Posted on:2005-04-08Degree:DoctorType:Dissertation
Country:ChinaCandidate:L W XieFull Text:PDF
GTID:1100360155958545Subject:Mineralogy, petrology, ore deposits
Abstract/Summary:PDF Full Text Request
The lake sediment is one of the carriers of palaeoclimatic information, and the close salines are sensitivity with climatic change. It is an important means of studying the past climatic change to analyze and test the lake sediment, and its common method is the construction for palaeoclimatic change curve with these data including drill core, delamination, age determination and sample test. The author has discovered a new proxy index and gained some data about the past climatic change by remote sensing (RS) technique, the climatic change curve for last 2000 years established here has a resolution by year or decade in Luobupo saline.The people do not begin to study on the past climatic change using remote sensing until it has been born, so it was a blank to research on the past long climatic change. In this article, according to the modern evolution theory of saline, the author discussesed the origin of the rings image in Luobupo saline, and established the physics model for the past climatic change. At last, it has been indicated that the rings image results from the regular variation of the lake sediment, which reflects the climatic cold and warm fluctuation.The Past Global'Change (PAGES) Project has defined on two important time scales, one of which is the last 2000 years climatic change with the high resolution, accurate age and clear palaeoclimatic meaning. The past climatic change curve established by the author has a higher time resolution, but the age determination and the palaeoclimatic meaning will be test. In the paper, the last 1000 years climatic change curve is made comparison between Shihua cave in Beijing and northern hemisphere, studied the response of saline to the climatic events, which shows that the curve has clear palaeoclimatic meaning.The research results showed that the relativity of the air temperature various data during the past 1000a in the Northern Hemisphere and during A.D. 1300a to 1500a in Luobupo saline is 0.82316654. The millennium time scale is consistent with curve of Guliya Ice Core, the trend of climatic change rose slowly, and the centenary time scale is consistent with Western historic climate and regional change. The variety of high...
Keywords/Search Tags:Global change, Luobupo saline, Dataing Sediment, Past climate change, Remote Sensing Technique, saline rings image
PDF Full Text Request
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