本文選題：樹木年輪 + 穩(wěn)定氧同位素　； 參考：《冰川凍土》2017年02期

【摘要】：樹輪穩(wěn)定氧同位素作為一種高精度的古氣候代用指標,在亞洲地區(qū)的發(fā)展起步晚進步快。樹輪穩(wěn)定氧同位素比率(δ~(18)O)對區(qū)域氣候信息有較強的記錄能力,且與水汽循環(huán)關(guān)系密切,對于理解復(fù)雜的亞洲氣候起著重要作用。亞洲地區(qū)樹輪δ~(18)O對溫度的響應(yīng)主要出現(xiàn)在高緯度地區(qū),中低緯度樹輪δ~(18)O主要記錄與水分(降水、相對濕度、PDSI等)有關(guān)的信號。對亞洲地區(qū)已發(fā)表的樹輪δ~(18)O與氣候要素(溫度、降水、相對濕度)的相關(guān)分析顯著性統(tǒng)計顯示,生長季氣候?qū)漭啨膥(18)O至關(guān)重要,樹輪δ~(18)O與溫度的顯著相關(guān)關(guān)系呈正相關(guān),與降水和相對濕度的呈負相關(guān),溫度和降水通過降水δ~(18)O影響樹輪δ~(18)O,但各自的信號強度存在區(qū)域差異,而相對濕度信號則廣泛記錄在不同區(qū)域不同樹種之中。亞洲樹輪穩(wěn)定氧同位素研究集中于中低緯度地區(qū),因而對大氣水文循環(huán)的響應(yīng)主要側(cè)重于對亞洲夏季風(fēng)和ENSO的研究,對季風(fēng)降水的記錄反映了季風(fēng)活動的變化特征以及與之有關(guān)的環(huán)流信息;季節(jié)分辨率的樹輪穩(wěn)定氧同位素研究限于低緯熱帶亞熱帶區(qū)域,但對于理解區(qū)域氣候和季風(fēng)活動的年內(nèi)變化、挖掘年輪不清晰樹種的樹輪學(xué)研究潛力具有重要的意義。
[Abstract]:As a high precision paleoclimate index, tree-ring stable oxygen isotope has developed rapidly in Asia.The stable oxygen isotope ratio (未 ~ (18) O) of tree rings has a strong ability to record regional climate information and is closely related to the water vapor cycle, which plays an important role in understanding the complex Asian climate.In Asia, the response of tree ring 未 ~ (18) O to temperature mainly occurs in high latitudes, while in middle and low latitudes, 未 ~ (18) O mainly records the signals related to water (precipitation, relative humidity, PDSI, etc.).The significant analysis of the correlation between the climatic elements (temperature, precipitation, relative humidity) and tree ring 未 ~ (18) O published in Asia shows that climate is very important to tree ring 未 ~ (18) O in growing season, and there is a positive correlation between 未 ~ (18) ~ (18) O and temperature in tree ring.There is a negative correlation between temperature and relative humidity. Temperature and precipitation influence tree ring 未 ~ (18) O through precipitation 未 ~ (18) O, but there are regional differences in their signal intensity, while the relative humidity signal is widely recorded in different tree species in different regions.The stable oxygen isotopic studies of Asian tree rings are concentrated in the middle and low latitudes, so the response to the atmospheric hydrological cycle is mainly focused on the study of the Asian summer monsoon and ENSO.The records of monsoon precipitation reflect the characteristics of the monsoon activity and the circulation information associated with it. The seasonal resolution tree-ring stable oxygen isotope study is limited to the low-latitude tropical subtropical region.However, it is of great significance to understand the annual changes of regional climate and monsoon activities and to tap the tree-ring potential of tree rings with unclear tree species.
【作者單位】： 蘭州大學(xué)資源環(huán)境學(xué)院西部環(huán)境教育部重點實驗室;
【基金】：教育部博士點基金項目(20120211110041) 國家自然科學(xué)基金項目(41475067) 蘭州大學(xué)開放基金項目(lzujbky-2013-bt01)資助
【分類號】：P532;Q948

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