A paper by Jiang et al. (2019, https://doi.org/10.1029/2018JA026040) apparently tries to find common ground between observations of the F3 layer and TIDs by referring to the later when observed near the equatorial anomaly peak as a new type 1 and TIDs by using ray tracing models with arbitrarily adjusted TID parameters. Further confusion in conflating the two separate phenomena is created by referring to both as “stratification.” This comment points out that the F3 is a daytime temporary layer maintained by E × B uplift at the magnetic equator, normally occurs consistently within the peaks of the equatorial ionization anomaly in F2 electron density and may last for hours. Such a layer can be described as a stratification. How this effect dies out beyond the anomaly peak has yet to be experimentally ascertained. A cusp or inflection type TID is a manifestation of a gravity wave with no consistency in location and local time, of short duration measured in minutes, involving a continuous descent in height and should not be described as stratification. The theory of both is well known, and attempting to explain a possible F3 layer as a new type of layer when seen in the vicinity of an equatorial anomaly peak misunderstands the theory of the phenomenon. Attempts to characterize such a phenomenon as a TID manifestation are not defensible.

中文翻译：

---

Jiang等人评论“使用简单的TID模型对离子图进行F2层分层研究”。

Jiang等人的论文。（2019，https://doi.org/10.1029/2018JA026040）显然试图通过在赤道异常峰附近观测到的新的类型1和TID指代在F3层和TID的观测之间找到共同点，方法是参考后者带有任意调整的TID参数的光线跟踪模型。通过将两个单独的现象称为“分层”，进一步混淆了两者。这则评论指出，F3是由电磁赤道的E×B隆起维持的白天临时层，通常在F2电子密度的赤道电离异常的峰值内持续发生，并且可能持续数小时。这样的层可以描述为分层。这种影响如何消失到异常峰之外还需要通过实验确定。尖峰或拐点型TID是重力波的表现，在位置和本地时间上没有一致性，持续时间以分钟为单位，涉及高度连续下降，因此不应被描述为分层。两者的理论都是众所周知的，并且试图将可能的F3层解释为在赤道异常峰附近看到的一种新型层，这会误解该现象的理论。试图将这种现象描述为TID表现是没有道理的。当试图在赤道异常峰附近看到这种可能的F3层时，将其解释为一种新型的层，这会误解该现象的理论。试图将这种现象描述为TID表现是没有道理的。当试图在赤道异常峰附近看到这种可能的F3层时，将其解释为一种新型的层，这会误解该现象的理论。试图将这种现象描述为TID表现是没有道理的。