JASTP Transitional Hold最新文献

筛选

英文中文

The Response of Surface-Level Atmospheric Electrical Parameters in Israel to Severe Space Weather Events 以色列地面大气电参数对空间恶劣天气事件的响应

JASTP Transitional Hold Pub Date : 2020-05-07 DOI: 10.2139/ssrn.3595132

R. Yaniv, Y. Yair, C. Price, Y. Reuveni

{"title":"The Response of Surface-Level Atmospheric Electrical Parameters in Israel to Severe Space Weather Events","authors":"R. Yaniv, Y. Yair, C. Price, Y. Reuveni","doi":"10.2139/ssrn.3595132","DOIUrl":"https://doi.org/10.2139/ssrn.3595132","url":null,"abstract":"We report on ground-based measurements of the atmospheric electric field (Ez) and current density (Jz) that were conducted from Israel at two locations. At the Mt. Hermon station (34.45 N, 2020 m AMSL) located in northern Israel near the Syrian-Lebanon border and at the Wise astronomical observatory in the Negev desert highland plateau of southern Israel (31.18 N, 870 m AMSL). We investigated possible effects of strong, short-term solar events that occurred during days that are defined meteorologically as fair-weather days. The first case study (St. Patrick Day, 17 March 2015) was classified as the strongest event of 2015. The second case study (8 Sep 2017) was categorized as the strongest event of 2017 and the 12 th strongest event on record to date. The results show that electrical parameters measured at ground level at both stations are affected during the two massive proton events and the ensuing geomagnetic storms. We deduce that our stations are both near the detection threshold of global electrical circuit response to solar disturbances because the magnetospheric shielding is strong enough to stop most of the flux of energetic particles, almost obscuring noticeable impacts that are above the daily variations induced by local meteorological conditions.","PeriodicalId":323306,"journal":{"name":"JASTP Transitional Hold","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122522855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the Necessity of Using foμEs Instead of Foes in Estimating The Intensity and Variability of Sporadic E Layers 用foμE代替foe估计散发性E层强度和变异性的必要性

JASTP Transitional Hold Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3586276

C. Haldoupis, H. Haralambous, C. Meek

{"title":"On the Necessity of Using foμEs Instead of Foes in Estimating The Intensity and Variability of Sporadic E Layers","authors":"C. Haldoupis, H. Haralambous, C. Meek","doi":"10.2139/ssrn.3586276","DOIUrl":"https://doi.org/10.2139/ssrn.3586276","url":null,"abstract":"The ordinary wave critical frequency foEs is measured routinely by ionosondes and used widely in estimating the intensity and occurrence of sporadic E (Es) metal ion layers.  Recently, however, it was realized that foEs overestimates Es intensities because it corresponds to the sum of both the layer metal ion plasma and the regular E region plasma densities. To account for this, a new parameter, foμEs , was introduced that corresponds to the Es layer metal plasma density only, and a method was proposed for its calculation. In the present work, an ionosonde data set is analyzed in order to assess the importance of replacing foEs by foμEs in Es studies. To this objective, the diurnal and seasonal variability of sporadic E is re-examined. It turns out that the Es mean diurnal and seasonal variations estimated by means of using foμEs , differ substantially from those based on foEs, implying that the use of foEs leads to biased results and wrong physical inferences. It is therefore urged that foμEs is adopted and used instead of foEs, in future ionosonde sporadic E studies. The same applies for the case of satellite radio occultation (RO) sporadic E investigations as well, where foµEs should be used, instead for foEs, for calibration and validation purposes.","PeriodicalId":323306,"journal":{"name":"JASTP Transitional Hold","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122425755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0