Stratospheric thermal damping times
Stratospheric thermal damping times
复制标题
平流层热阻尼时间
DOI：
10.1029/96gl03720
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发表时间：
1997
影响因子：
5.2
通讯作者：
J. Rosenfield
中科院分区：
文献类型：
--
作者：
P. Newman;J. Rosenfield
平流层温度波的辐射阻尼对平流层物理过程有着广泛的意义。阻尼线性参数化为与局部温度成比例。利用戈达德辐射传输模型和17年的观测资料计算了热阻尼。计算了所有纬度每个月平流层温度的衰减时间。这些衰减时间与之前的平流层估计一致，但显示了较短的热带时间尺度。阻尼时间从全球年平均28天（100百帕）到4天（1百帕）不等。在平流层的大部分地区可以看到相当大的年周期，这与温度的年周期直接相关，与较低温度相关的阻尼时间较长。
Radiative damping of stratospheric temperature waves has wide implications for stratospheric physical processes. Damping is linearly parameterized as proportional to the local temperature. Thermal damping is calculated using the Goddard radiative transfer model and 17 years observations. Damping times of stratospheric temperatures are calculated for each month at all latitudes. These damping times are consistent with previous stratospheric estimates, but show shorter tropical time scales. Damping times range from an annual global average of 28 days (100 hPa) to 4 days (1 hPa). A considerable annual cycle is seen over much of the stratosphere, which is directly related to the annual cycle of temperatures, with longer damping times associated with colder temperatures.