Climate trends at Eureka in the Canadian high arctic
Climate trends at Eureka in the Canadian high arctic
复制标题
加拿大北极地区尤里卡的气候趋势
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
J. Drummond
中科院分区：
文献类型：
--
作者：
G. Lesins;T. Duck;J. Drummond
摘要自1953年以来，在加拿大北极高纬度地区埃尔斯米尔岛的尤里卡进行的天气观测已被存档。给出了1954 - 2007年期间地表温度、气压、露点、相对湿度、云量、风速和风向的时间序列、平均值和季节周期。图中还显示了500毫巴温度、900至500毫巴厚度、500毫巴风速和各种边界层稳定性参数的时间序列和平均值。发现的一些主要趋势是：1）自1972年以来，年平均地表变暖3.2°C，夏季变暖最少，2）冬季强反气旋事件的频率减少，3）除夏季外，地表风速减少，4）自1961年以来，500毫巴温度变暖1.0°C，（5）1961年以来可降水量常年增加10%，但以春、夏、秋三季为主。北冰洋的开放水域对夏季温度和湿度的重要性，北大西洋涛动对冬季年际压力变率的重要性，以及可降水量对冬季温度的重要性在本气候学中得到了强调。
Abstract Weather observations made at Eureka, on Ellesmere Island in the Canadian High Arctic, have been archived since 1953. The time series, averages, and seasonal cycles of surface temperature, pressure, dew point, relative humidity, cloud cover, wind speed, and direction are presented for the period from 1954 to 2007. Also shown are the time series and averages for the 500 mb temperature, 900 to 500 mb thickness, 500 mb wind speed, and various boundary‐layer stability parameters. Some of the main trends found are 1) an annual average surface warming of 3.2°C since 1972, with summer exhibiting the least warming, 2) a reduction in the frequency of strong anticyclonic events in the winter, 3) a reduction in surface wind speeds except in the summer, 4) a 1.0°C warming in the 500 mb temperature since 1961, with the greatest warming occurring in the spring and summer, and 5) a 10% increase in precipitable water all year round since 1961 but dominated by the spring, summer, and autumn seasons. The importance of open water in the Arctic Ocean for summer temperatures and humidity, of the North Atlantic Oscillation for winter interannual pressure variability, and of precipitable water for winter temperatures are highlighted in this climatology.