Seasonal variations of organic carbon and nitrogen in the upper basins of Yangtze and YelIow Rivers

The profound impacts exerted by climatewarming on the Tibetan Plateau have beendocumented extensively, but the biogeochemicalresponses remain poorly understood. This study wasaimed at seasonal variations of total organic carbon（TOC） and total organic nitrogen （TON） in streamwater at two gauging sections （TTH, ZMD） in theupper basin of Yangtze River （UBYA） and at four gauging sections （HHY, JM, JG, TNH） in the upperbasin of Yellow River （UBYE） in 2013. Results showedthat concentrations of TON exhibit higher values inspring and winter and lower values in summer.