Reformulation and energy flow of the Cowling channel

R. Fujii, O. Amm, A. Yoshikawa, A. Ieda, H. Vanhamäki

doi:10.1029/2010ja015989

[1] The question to which extent the divergence of the Hall current can be connected to the Pedersen current or to the closure current in the magnetosphere through field-aligned currents (FACs), that is, the Cowling channel process in the polar region, has long been debated but not fully understood. The present study reformulates the Cowling channel by introducing a two-layer model consisting of Hall and Pedersen conductivity layers with channel boundaries not only in the direction perpendicular to the channel but also in the direction along it. This new model enables us to better and more physically understand the connection between the Hall current, Pedersen current, and FAC. In particular, the finiteness of the channel along its direction enables us to understand that the primary nonzero electric field along the channel and FACs at the channel boundaries that faced each other in the channel direction carries the necessary energy for the Hall current to set up the secondary electric field from the magnetosphere. A case for a possible connection between the Pedersen and Hall currents is shown based on a polar current system derived from the Kamide-Richmond-Matsushita method. A more comprehensive analysis based on data is presented in the companion paper.

Reformulation and energy flow of the Cowling channel

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Reformulation and energy flow of the Cowling channel

書誌事項

この論文をさがす

説明

収録刊行物

被引用文献 (13)*注記

参考文献 (15)*注記

関連プロジェクト

詳細情報 詳細情報について

書き出し

問題の指摘

詳細情報詳細情報について