Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61540
Title: Observational study of ionospheric irregularities and GPS scintillations associated with the 2012 tropical cyclone tembin passing Hong Kong
Authors: Yang, Z
Liu, Z 
Keywords: Global Positioning System (GPS)
GPS Radio Occultation
Ionospheric irregularity and scintillation
Tropical cyclone
Issue Date: 2016
Publisher: Wiley-Blackwell
Source: Journal of geophysical research : space physics, 2016, v. 121, no. 5, p. 4705-4717 How to cite?
Journal: Journal of geophysical research : space physics 
Abstract: This study presents the ionospheric responses observed in Hong Kong to a Typhoon, namely, Tembin, from the aspects of the occurrence of ionospheric irregularities and scintillations, using Global Positioning System (GPS) observations from a ground-based GPS scintillation monitoring station in Hong Kong and from GPS receivers on board the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) satellites. The ionospheric irregularities and scintillations are characterized by the rate of total electron content variation index (ROTI) and the amplitude scintillation index S4, respectively. The typhoon Tembin formed over the western North Pacific during 18–30 August 2012 and approached Hong Kong during 24–27 August 2012 with the closest distance 290 km from Hong Kong at around 17 universal time (UT) on 25 August 2012. The ground-based observations indicate that in the nighttime period of 20:00–02:00 local time (LT = UT + 8 h) on 26 August when Tembin passed closely to Hong Kong, the ionospheric irregularities and scintillations of GPS signals were observed in the south of Hong Kong, over the area of 13°N ~ 23°N in latitude and 110°E ~ 120°E in longitude. From the COSMIC observations, it shows that the number of radio occultation scintillation events peaks on 26 August 2012 during the passage of Tembin. Without the presence of strong geomagnetic or solar activity, it is suspected that gravity waves might be generated in the lower atmosphere and likely seed the formation of ionospheric plasma irregularities. This work for the first time from Hong Kong observes the sign of coupling between the lower atmosphere and ionosphere in a tropical cyclone event, combining both ground- and space-based GPS observation data.
URI: http://hdl.handle.net/10397/61540
ISSN: 2169-9380 (print)
2169-9402 (online)
DOI: 10.1002/2016JA022398
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page view(s)

15
Last Week
2
Last month
Checked on Sep 25, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.