Relationship between horizontal flow velocity and cell lifetime for supergranulation from SOHO Doppl
Relationship between horizontal flow velocity and cell lifetime for supergranulation from SOHO Doppl
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SOHO Doppl 超颗粒化的水平流速与细胞寿命之间的关系
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Raghavendra Srikanth
中科院分区：
文献类型：
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作者：
U. Paniveni;V. Krishan;Jagdev Singh;Raghavendra Srikanth
对50个太阳和日光层观测站（SOHO）的超颗粒细胞进行了多普勒研究，以探讨细胞寿命（T）与水平流速（u h）之间的关系。对于这个样本，我们发现，这两个参数是相关的关系uh oc T 1/2和T是由涡流周转时间。这与太阳大气湍流对流模型一致，在该模型中，超颗粒场的速度谱（由关系式v h α L 1/3给出）可以与涡旋尺度L的Kolmogorov谱相一致。
A study of 50 supergranular cells obtained from Solar and Heliospheric Observatory (SOHO) Dopplergrams was undertaken in order to investigate the relationship between the lifetime (T) and the horizontal flow velocity (u h ) of the cells. For this sample, we find that the two parameters are correlated with a relation u h oc T 1/2 and T is identified by the eddy turnover time. This is in agreement with the turbulent convective model of the solar atmosphere, where the velocity spectrum of the supergranular field, given by the relation v h α L 1/3 , can be identified with the Kolmogorov spectrum for the eddy size L.