Regional trends of surface and tropospheric temperature and evening-morning temperature difference i
Regional trends of surface and tropospheric temperature and evening-morning temperature difference i
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地表和对流层温度及早晚温差的区域趋势
DOI：
10.1029/96gl03076
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
J. Susskind
中科院分区：
文献类型：
--
作者：
R. Ross;J. Otterman;D. Starr;W. Elliott;J. Angell;J. Susskind
根据8个北纬地区的无线电探空观测资料，分析了1973-1993年21年期间地面和对流层温度的趋势。对这些地区的地面和对流层温度趋势以及早晚温差的季节一致性进行了研究。在大多数季节，欧亚大陆和北半球西部的地表温度趋势为正。美国，但在N中部为阴性。美国和加拿大东部。具有相当大的和统计上显着的地面温度趋势的区域通常有显着的对流层趋势高达500毫巴，有时达300毫巴。一个例外是中亚，那里的强烈变暖被限制在850毫巴以下。显著的对流层趋势显示出幅度随高度减小的趋势。还分析了加拿大和俄罗斯两个地区的夜间-早晨温差趋势，其中无线电探空仪发射时间为上午5点和下午± 2小时。趋势是相当一致的表面和低对流层之间的标志在这两个部门和高达300毫巴在加拿大。大多数加拿大的趋势是显着的，代表了晚上和早上温度之间的下降幅度。俄罗斯的主要趋势是在夏季。
Trends for the 21-year period 1973–1993 of temperatures at the surface and in the troposphere were analyzed from radiosonde observations in eight north-latitude regions. The seasonal consistency of the surface and tropospheric trends of temperature and evening-morning temperature difference was examined for these regions. In most seasons the surface temperature trends were positive in Eurasia and western N. America but were negative in central N. America and eastern Canada. The regions with sizable and statistically significant surface temperature trends usually had significant tropospheric trends up to 500 mb and sometimes to 300 mb. An exception was central Asia, where the strong warming was confined below 850 mb. The significant tropospheric trends showed a tendency to decrease in magnitude with height. Trends of the evening minus morning temperature difference were also analyzed in two sectors, Canada and Russia, where the radiosonde launches occurred at 5am and pm ±2hrs. Trends were fairly consistent in sign between the surface and lower troposphere in both sectors and up to 300 mb over Canada. Most Canadian trends were significant and represented a decreasing range between evening and morning temperatures. Significant Russian trends were primarily in summer.