Physics Department Seminar Series - FR

Event date(s): February 22, 2024
Time(s): 01:15 PM - 02:15 PM
Category: Fredericton
Location: Fredericton

Join us for the weekly Physics seminar series, featuring Gopika Rajeev Nair.

Date: Feb. 22, 1:15 - 2:15 p.m.

Location: Toole Hall, Room 3

Speaker: Gopika Rajeev Nair

Title: Investigation of Sporadic E Layer Characteristics within the High-Latitude Polar Cap

Abstract: Sporadic E (Es) layers, known for their enhanced ionization in E region heights, represent a remarkable phenomenon with a critical frequency (FoEs) that often surpasses even the F2 layer critical frequency, impacting HF radio propagation. Identification of Es layers is facilitated through ionosonde observations by their appearance in ionograms (Records depicting the relationship between the transmitted signal frequency and virtual height of the reflected echo). These dense patches of enhanced ionization, occurring typically within the altitude range of 90 to 150 km, have significant implications for electromagnetic wave reflection. In high latitudes, diverse Es layer types, including height spread, thin, and auroral are found.
This study delves into the climatological patterns, exploring both seasonal and diurnal variations, and investigates the drift trends of different Es layer types within the high-latitude region. Data from the Canadian Advanced Digital Ionosonde (CADI) within the Canadian High Arctic Ionospheric Network (CHAIN) at the Pond Inlet station (72.70° N, 77.95° W) has been used for the study, hourly occurrence statistics of Es layers have been analyzed for the years 2014 and 2020. The findings unravel the dynamic nature of sporadic E layers in the polar cap region, offering valuable insights into ionospheric variability in high-latitude environments.

Building: Toole Hall

Room Number: 3