Supergranulation is the horizontal velocity pattern on the solar surface with a typical size of 30,000 km and a lifetime of 24 hr. The network structure seen in chromospheric lines, such as Ca ii K 3934 Å, is the manifestation of supergranulation. The network seen in the extreme-ultraviolet lines like He ii 304 Å is the extension of the chromospheric network into the upper solar atmosphere. We have obtained the length scales of the supergranulation network from the autocorrelation function of calcium ii K spectroheliograms from the Kodaikanal archival data. The behavior of the length scales in the horizontal (parallel to the direction of rotation) and vertical (perpendicular to the direction of rotation) have been obtained in different latitudes for a period of about 100 yr. The time-averaged length scales show a nearly symmetric variation in the northern and southern hemispheres. The length scales also s...

中文翻译：

---

太阳超颗粒化网络长度尺度的不对称性

超颗粒化是太阳表面的水平速度模式，典型大小为30,000 km，寿命为24 hr。在色球线中看到的网络结构，例如Ca ii K 3934Å，是超粒化的表现。在像He ii 304Å这样的极紫外线中看到的网络是色球层网络到上层太阳大气的扩展。我们已经从Kodaikanal档案数据中的iiK钙谱图的自相关函数获得了超颗粒网络的长度尺度。在大约100年的时间段内，已经在不同的纬度下获得了长度标尺在水平（平行于旋转方向）和垂直（垂直于旋转方向）上的行为。时间平均长度尺度在北半球和南半球显示出几乎对称的变化。长度秤也可以...