E. G. Thomas, S. G. Shepherd, B. S. R. Kunduri, D. R. Themens
{"title":"Multi-Frequency SuperDARN HF Radar Observations of the Ionospheric Response to the October 2023 Annular Solar Eclipse","authors":"E. G. Thomas, S. G. Shepherd, B. S. R. Kunduri, D. R. Themens","doi":"10.1029/2024GL112450","DOIUrl":null,"url":null,"abstract":"<p>An annular solar eclipse was visible on 14 October 2023 from 15:00–21:00 UT as its path traveled across North, Central, and South America. In this letter, we present the first multi-frequency Super Dual Auroral Radar Network (SuperDARN) observations of the bottomside ionospheric response to a solar eclipse using a novel experimental mode designed for the October 2023 annular eclipse. We compare our results from the mid-latitude Christmas Valley East radar with measurements of the vertical electron density profile from the nearby Boulder Digisonde, finding the changes in 1- and 2-hop ground scatter skip distance are well correlated with the <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mi>F</mi>\n <mn>2</mn>\n </msub>\n </mrow>\n <annotation> ${F}_{2}$</annotation>\n </semantics></math>-layer density response, which lags the peak obscuration by <span></span><math>\n <semantics>\n <mrow>\n <mo>∼</mo>\n </mrow>\n <annotation> ${\\sim} $</annotation>\n </semantics></math>30 min. Changes in the line-of-sight Doppler shifts are better aligned with the time derivative of eclipse obscuration.</p>","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"51 24","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GL112450","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1029/2024GL112450","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
An annular solar eclipse was visible on 14 October 2023 from 15:00–21:00 UT as its path traveled across North, Central, and South America. In this letter, we present the first multi-frequency Super Dual Auroral Radar Network (SuperDARN) observations of the bottomside ionospheric response to a solar eclipse using a novel experimental mode designed for the October 2023 annular eclipse. We compare our results from the mid-latitude Christmas Valley East radar with measurements of the vertical electron density profile from the nearby Boulder Digisonde, finding the changes in 1- and 2-hop ground scatter skip distance are well correlated with the -layer density response, which lags the peak obscuration by 30 min. Changes in the line-of-sight Doppler shifts are better aligned with the time derivative of eclipse obscuration.
期刊介绍:
Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.