三江源区气温变化与海拔高度的响应变化研究
三江源区气温变化与海拔高度的响应变化研究
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发表时间：
2014
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通讯作者：
孙永娟
中科院分区：
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作者：
鄂崇毅;胡洪昌;谢宏;孙永娟
由于缺乏足够的观测站和长期的气候资料，对长江、黄河源区气温变化及其与海拔的关系的研究一直很不足。本研究使用了1961年至2007年震源区及其附近32个测站的5个温度指数。32个台站均经历了显著增暖，增温幅度均高于青藏高原平均增暖幅度。平均最低气温和极端最低气温增温幅度和增温趋势明显的站点数均高于平均最高气温和极端最高气温。气候变暖的海拔依赖性和显著增温站点的数量不明显；人类活动和城市化的影响可能较大。3000m以上的26个台站增温幅度趋于一致，3000m以下的6个台站增温幅度无明显变化，相反，4000m以上最低气温显著增暖的站点比例远小于4000m以下的站点。
The study of temperature change and its elevation dependency in the source region of the Yangtze River and Yellow River have been insufficient owing to the lack of adequate observation stations and long-term climatic data. In this study five temperature indices of 32 stations from 1961 to 2007 in and near the source region are used. The 32 stations all have experienced significant warming; the warming amplitudes are higher than the mean warming amplitude of the Qinghai-Tibetan plateau. The warming amplitudes and the numbers of stations showing significant warming trends in mean minimum temperature and extreme minimum temperature are higher than that of the mean maximum temperature and extreme maximum temperature. The elevation dependency of climatic warming and the amount of significant warming stations are not obvious; the influence of human activity and urbanization may be higher. The warming amplitudes of 26 stations above 3000 m tend to be uniform, and there is no significant law at 6 stations below 3000 m. On the contrary, the ratio of stations showing significant warming in minimum temperature above 4000 m is far less than that of the stations below 4000 m.