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利用西藏羊卓雍湖流域气象、水文观测站1961-2005年逐月的平均气温、降水量等资料,分析了近45年流域气温、降水的年际和年代际变化特征和异常年份,以及羊湖水位变化趋势及影响因子,结果表明:近45年流域年平均气温以0.25 oC/10a的速率显著升高,增温主要表现在秋、冬季。近25年,流域平均降水量除冬季呈减少趋势外,其他各季节表现为显著的增加趋势,增幅为11.4~30.0 mm/10a,夏季增...
Snow Cover Variation in the Past 45 Years (1959-2003) in the Tianshan Mountains, China
snow cover Tianshan Mountains climate change North Atlantic Oscillation
2009/8/28
Meteorological data at 17 weather stations in the Tianshan Mountains from 1959 to 2003 were analyzed to explore the variations in temperature and snow cover. The abrupt change test for snow depth was ...
Modeling variations of marine reservoir ages during the last 45 000 years
marine reservoir ages modeling variations
2008/10/30
When dating marine samples with 14C, the reservoir-age effect is usually assumed to be constant, although atmospheric 14C production rate and ocean circulation changes cause temporal and spatial rese...
大面积开荒扰动下的三江平原近45年气候变化
2007/8/24
黑龙江省三江平原近45年来,经过大规模的开荒,农田已取代原来的沼泽和沼泽化湿地,成为现今三江平原的主要景观类型,其下垫面发生了巨大变化。采用1955~1999年三江平原地区21个气象台站的气温、降水、日照时数和气压4个要素的资料,分析近45年来三江平原的气候变化和发展趋势;用Yamamoto法和Mann-Kendall法对5年滑动平均的区域季节和年时间序列进行突变检测,定量...