English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A few of the difficulties in accuratelymodelling high-latitude electron densities with a large-scale numerical model ofthe thermosphere and ionosphere are addressed by comparing electron densitiescalculated with the Coupled Thermosphere-Ionosphere Model (CTIM) to EISCAT data.Two types of simulations are presented. The first set of simulations consists offour diurnally reproducible model runs for a Kp index of 4o which differonly in the placement of the energetic-particle distribution and convectionpattern input at high latitudes. These simulations predict varying amounts ofagreement with the EISCAT data and illustrate that for a given Kp thereis no unique solution at high-latitudes. Small changes in the high-latitudeinputs cause dramatic changes in the high-latitude modelled densities. Thesecond type of simulation consists of inputting statistical convection andparticle precipitation patterns which shrink or grow as a function of Kpthroughout a 3-day period 21–23 February 1990. Comparisons with the EISCAT datafor the 3 days indicate that equatorward of the particle precipitation the modelaccurately simulates the data, while in the auroral zone there is morevariability in the data than the model. Changing the high-latitude forcing as afunction of Kp allows the CTIM to model the average behavior of theelectron densities; however at auroral latitudes model spatial and temporalscales are too large to simulate the detailed variation seen in individualnights of data

Modelling high-latitude electron densities with a coupled thermosphere-ionosphere model