%0 Journal Article
%T Study of altitudinal lapse rates of ¦Ä18O in precipitation/river water with seasons on the southeast Tibetan Plateau
%A XiaoXin Yang
%A BaiQing Xu
%A Wei Yang
%A DongMei Qu
%A Ping-Nan Lin
%J Chinese Science Bulletin
%@ 1861-9541
%D 2009
%I 
%R 10.1007/s11434-009-0496-5
%X Seasonal ¦Ä18O variation in water on the southeast Tibetan Plateau has been studied, showing the consistent variation pattern of ¦Ä18O with altitude indicative of relevant atmospheric circulation processes. Study shows a similar variation pattern of fixed-site river water ¦Ä18O with that of the precipitation ¦Ä18O in southeast Tibet. ¦Ä18O in regional rivers in southeast Tibet demonstrates a gradual depletion with increasing altitude, though the rates vary seasonally. The most depleted river 18O occurs during the monsoon period, with the lowest ¦Ä18O/altitude lapse rate. The river 18O during the westerly period is also depleted, together with low ¦Ä18O/altitude lapse rate. The pre-monsoon rivers witness the most enriched 18O with least significant correlation coefficient with the linear regression, whilst the post-monsoon rivers witness the largest ¦Ä18O/altitude lapse rate. Different coherence of seasonal ¦Ä18O variation with the altitude effect is attributed to different moisture supplies. Though sampling numbers vary with seasons, the ¦Ä18O-H linear correlation coefficients all reach the 0.05 confidence level, thus witnessing the variation features of ¦Ä18O in seasonal river water due to the influence of atmospheric general circulation and land surface processes revealed from the altitudinal lapse rates.
%K river water
%K precipitation
%K southeast Tibetan Plateau
%K ¦Ä18O
%K altitude effect
%K Indian monsoon
%U http://link.springer.com/article/10.1007/s11434-009-0496-5