On the Asymmetric Structure of the Tropical Cyclone Outflow Layer
On the Asymmetric Structure of the Tropical Cyclone Outflow Layer
复制标题
热带气旋流出层的不对称结构研究
DOI：
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发表时间：
1971
期刊：
影响因子：
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通讯作者：
R. Anthes
中科院分区：
文献类型：
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作者：
P. Black;R. Anthes
摘要利用ATS-III卫星资料和常规高空气象资料，对四次飓风和一次热带风暴的外流层进行了详细的风场分析。对这些数据以及平均大西洋飓风和平均太平洋台风数据的调和分析表明，风暴周围的波数1和2可以解释动量和动能的大部分变化。从总流量中减去涡旋环流的对称部分，得到“不对称风”，显示出两个涡旋位于风暴的优先象限。在风暴运动的右侧发现一个反气旋涡旋，左侧发现一个气旋涡旋。这些涡旋将绝对涡度向内输送，与平均环流的向外输送相反。它们还向外传输了大量的负相对角动量。惯性（或动态）不稳定性的存在进行了研究。虽然负绝对涡度和负绝对涡度的大部分区域…
Abstract ATS-III satellite data and conventional aerological data are used to construct detailed wind analyses of the outflow layer for four hurricanes and one tropical storm. Harmonic analysis of these data, and of the data for a mean Atlantic hurricane and a mean Pacific typhoon, shows that wave numbers 1 and 2 around the circumference of the storm account for most of the variance of momentum and kinetic energy. Subtraction of the symmetric part of the vortex circulation from the total flow to yield the “asymmetric wind” reveals two eddies located in preferred quadrants of the storm. An anticyclonic eddy is found to the right and a cyclonic eddy to the left of the storm motion. These eddies transport absolute vorticity inward, opposing the outward transport by the mean circulation. They also transport a significant amount of negative relative angular momentum outward. The presence of inertial (or dynamic) instability is investigated. Although substantial areas of negative absolute vorticity and anomalou...