日前，由北京易科泰生態(tài)技術(shù)有限公司獨家代理的Multiscanner年輪元素分析系統(tǒng)在寒旱所公共實驗室平臺完成安裝調(diào)試和使用培訓，這是目前國際上功能最為強大的集X-光密度成像(CT)和XRF元素分析的年輪分析平臺。
MultiScanner年輪元素分析系統(tǒng)同時采用了XRF元素分析技術(shù)和X-射線數(shù)碼成像技術(shù)(CT)，用于樹木年輪密度和元素分析。可測量的元素有Al、Si、P、S、Cl、K、Ca、Ti、Cr、Mn、Fe、Ni、Cu、Zn、As、Rb、Sr、Hg、Pb等。其著名的同類產(chǎn)品為用于巖石樣芯、沉積樣芯密度與元素分析的CoreScanner。
下圖是對某一年輪樣品CT/XRF分析結(jié)果，包括光學成像、X-光密度成像(CT，中間的高分辨率黑白圖像)及Ca在不同年輪中的濃度分布(藍色曲線)。
MultiScanner不僅用于一般的年輪分析和古氣候、環(huán)境變遷等研究分析，Yvonne Fors等在2014年的《Nature》上還發(fā)表了應用于海洋考古學研究的論文“Sulfur and iron accumulation in three marine-archaeological shipwrecks in the Baltic Sea: The Ghost, the Crown and the Sword ”
Colette等(2013)利用MultiScanner對加拿大不列顛哥倫比亞中西部河流不同樹木年輪寬度和密度進行了分析，并據(jù)此重建了到AD1660年的年輪水文氣候，研究成果發(fā)表在《Hydrological Processes》(Dendrohydroclimate reconstructions of July–August runoff for two nival-regime rivers in west central British Columbia)。
Charlotte等(2006)利用MultiScanner對森林樹木樣品年輪密度及Mn元素和Bi元素進行了分析，以揭示氣候變化對樹木生長的影響。研究成果發(fā)表在《Applied Geochemistry》(A dendrochemical study of Pinus sylvestris from Siljansfors Experimental Forest, central Sweden)。
下面這則案例則利用Multiscanner研究分析重金屬污染對樹木生長的影響。
參考文獻
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