我國典型季風(fēng)海洋型冰川積累區(qū)冰雪剖面的環(huán)境記錄

摘要： 運用多種方法,對白水1號冰川積累區(qū)冰雪剖面的主要陰、陽離子和δ~(18)O的環(huán)境意義分析表明.受強烈淋溶作用影響,離子和δ~(18)O的季節(jié)變化不明顯,剖面離子濃度顯著低于雪坑,離子流失量較大.NH_4~+年際變化最為顯著,與麗江降水表現(xiàn)出相同的變化趨勢,Mg~(2+)和Ca~(2+)濃度與冰雪剖面凈積累量呈反向變化.分析表明,陰離子主要是濕沉降產(chǎn)物,陽離子主要是干沉降產(chǎn)物.該剖面所反映的13年δ~(18)O比率變化介于-11.8‰～-14.6‰.冰雪剖面中δ~(18)O與西南季風(fēng)指教、冰雪剖面積累量、麗江降水和麗江氣溫呈反向變化,表現(xiàn)出顯著的"降水量效應(yīng)". Abstract： Samples were colleted from the accumulation area, Baishui No. 1 glacier in May, 2004. The method of sea-salt ions tracer, correlation analysis and trend analysis were used in this research in order to confirm the environmental records. It is indicated that the seasonal variation of ions and δ~(18)O is very weak owing to ionic eluviation. The inter-annual variation of NH_4~+concentrations is apparent, and it is similar to the precipitation (from May to October) in Lijiang City. The variation trend is inverse between net accumulation and concentrations of Mg~(2+) and Ca~(2+). The main ionic non-marine source is local dust, and the secondary source is dust from central Asian arid regions carried by westerly circulation and the southeastern plateau bear areas with the Qinghai-Tibet plateau winter monsoon. In addition, the import of pollutants with monsoonal circulation from industrial areas has made some contribution to anions concentration in the study area. The values of δ~(18)O vary from-11.8‰ to -14.6‰, whose precipitation effect is obvious. It is important that the shallow firn profile can record environmental information in China's monsoonal temperate glacier region. 作 者： 李宗省    何元慶    和獻中    賈文雄    王世金    常麗    朱國鋒    辛惠娟    LI Zong-xing    HE Yuan-qing    HE Xian-zhong    JIA Wen-xiong    WANG Shi-jin    CHANG Li    ZHU Guo-feng    XIN Hui-Juan   作者單位： 李宗省,和獻中,賈文雄,王世金,常麗,朱國鋒,辛惠娟,LI Zong-xing,HE Xian-zhong,JIA Wen-xiong,WANG Shi-jin,CHANG Li,ZHU Guo-feng,XIN Hui-Juan(中國科學(xué)院寒區(qū)旱區(qū)環(huán)境與工程研究所冰凍圈科學(xué)國家重點實驗室/玉龍雪山冰川與環(huán)境觀測研究站,蘭州,730000;中國科學(xué)院研究生院,北京,100049)

何元慶,HE Yuan-qing(中國科學(xué)院寒區(qū)旱區(qū)環(huán)境與工程研究所冰凍圈科學(xué)國家重點實驗室/玉龍雪山冰川與環(huán)境觀測研究站,蘭州,730000) 

期 刊： 地球與環(huán)境  ISTICPKU   Journal： EARTH AND ENVIRONMENT  年，卷(期)： 2009, 37(4)  分類號： X141 P343.6  關(guān)鍵詞： 玉龍雪山    白水1號冰川    δ~(18)O    環(huán)境記錄    Keywords： Mr. Yulong    Baishui glacier No. 1    δ~(18)O    environmental records   

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