The Arctic Frontal Zone as Seen in the NCEP–NCAR Reanalysis
The Arctic Frontal Zone as Seen in the NCEP–NCAR Reanalysis
复制标题
NCEP-NCAR 再分析中看到的北极锋区
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Clark
中科院分区：
文献类型：
--
作者：
M. Serreze;A. Lynch;M. Clark
摘要 使用 1979-98 年期间 NCEP-NCAR 再分析数据计算的热锋参数显示，夏季沿欧亚大陆北部约 60° 至 70°N 的锋面频率出现相对最大值，在该大陆的东半部表现最佳。阿拉斯加也发现了类似的相对最大值，尽管在夏季表现最佳，但全年都存在。这些高纬度特征可以与太平洋盆地中纬度地区的极地锋区明显区分开来，并且总体上类似于一些早期研究中讨论的夏季“北极锋区”。虽然在所有季节中都观察到高纬度和中纬度锋面活动之间存在一定的分离，但夏季的特点是伴随着大致沿北冰洋海岸线排列的平均斜压区的发展以及对流层上层的相关风最大值。最大夏季锋面频率的区域对应于气旋发生的首选区域以及夏季...
Abstract Calculations of a thermal front parameter using NCEP–NCAR reanalysis data over the period 1979–98 reveal a relative maximum in frontal frequencies during summer along northern Eurasia from about 60° to 70°N, best expressed over the eastern half of the continent. A similar relative maximum is found over Alaska, which is present year-round although best expressed in summer. These high-latitude features can be clearly distinguished from the polar frontal zone in the midlatitudes of the Pacific basin and collectively resemble the summertime“Arctic frontal zone” discussed in several early studies. While some separation between high- and midlatitude frontal activity is observed in all seasons, the summer season is distinguished by the development of an attendant mean baroclinic zone aligned roughly along the Arctic Ocean coastline and associated wind maxima in the upper troposphere. The regions of maximum summer frontal frequency correspond to preferred areas of cyclogenesis and to where the summertime...