On local and zonal pulses of atmospheric heat transport in reanalysis data
On local and zonal pulses of atmospheric heat transport in reanalysis data
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DOI：
10.1002/qj.2529
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发表时间：
2015-07-01
影响因子：
8.9
通讯作者：
Czaja, A.
中科院分区：
文献类型：
--
作者：
Messori, G.;Czaja, A.
本研究分析了大值（或脉冲）的本地和纬向综合纬向大气热量输送由于瞬态涡。使用的数据是欧洲中期天气预报中心ERA-Interim再分析数据，每日经纬度分辨率为0.7度。感兴趣的领域是热带外。首先，与局部脉冲热输送的环流进行了说明。这被发现与温暖的传送带中发现的许多特征相匹配，尽管存在重要的区域差异。热输送的大值被认为是与协变纬向速度和湿静力能量异常。其次，它表明，存在着强烈的脉冲纬向热量输送时，纬向积分周围的一个给定的纬度圈被认为是。这些带状脉冲仅部分地由大量局部脉冲的同步发生驱动。纬向综合纬向热量输送存在这种明显的变化，对高纬度地区的能量平衡有重要的影响。
The present study analyses large values (or pulses) of local and zonally integrated meridional atmospheric heat transport due to transient eddies. The data used is the European Centre for Medium-range Weather Forecasts ERA-Interim reanalysis with daily, 0.7 degrees latitude and longitude resolution. The domain of interest is the extratropics. First, the circulation associated with local pulses of heat transport is described. This is found to match many of the features found in warm conveyor belts, although important regional differences exist. The large values of heat transport are seen to be associated with co-varying meridional velocity and moist static energy anomalies. Next, it is shown that there exist strong pulses of meridional heat transport when a zonal integral around a given latitude circle is considered. These zonal pulses are only partly driven by the synchronized occurrence of a large number of local pulses. The existence of such pronounced variability in zonally integrated meridional heat transport can have important consequences for the energy balance of the high latitudes.