Climate monitoring using GPS

Gradinarsky, Lubomir; Johansson, Jan M.; Bouma, H.R.; Scherneck, Hans‐Georg; Elgered, Gunnar

doi:10.1016/s1474-7065(02)00009-8

Cited by 99 publications

(79 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Following these promising results, numerous meteorological studies using PW derived from GPS measurements have been conducted and show encouraging results in various fields of meteorology, especially for improving moisture fields of numerical weather prediction from development (Kuo et al 1993) to operational use (Gutman et al 2003), including validating satellite and reanalysis data (Dietrich et al 2004), and monitoring climate change (Yuan et al 1993;Gradinarsky et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Precipitable Water Derived from Ground-Based GPS Measurements with Radiosonde Observations over the Korean Peninsula

Kwon

Iwabuchi

Lim

2007

Journal of the Meteorological Society of Japan

View full text Add to dashboard Cite

Precipitable water (PW) obtained from a permanent ground-based Global Positioning System (GPS) network on the Korean Peninsula was evaluated by using radiosonde measurements for two years. The GPS-derived PW is also validated using 5-min and 2-hourly troposphere products from International GNSS Service (IGS).The GPS-derived PW from our analysis and the IGS products were reasonably consistent with mean bias (Ours minus IGS products) of À0.27 mm and a standard deviation of 0.78 mm.The PW derived from radiosonde measurement (radiosonde PW) shows dry bias relative to GPSderived PW, where the mean bias (GPS minus radiosonde) is 1.50 mm with a standard deviation of 2.45 mm. We also found systematic bias in radiosonde PW depending on the radiosonde launch time. At the site with 6-hourly high temporal resolution soundings, the bias is greater during day (0900 and 15 LST) than at night (2100 and 0300 LST) with a difference of 1.34 mm in the maximum. In addition, our results show the dependency of error statistics on the absolute amount of PW and seasons. The bias increased for large amounts of PW especially in the daytime. Standard deviation tended to increase under humid conditions, but does not vary with observation time. The possible bias in GPS-derived PW caused by un-modeled phase center variation is also simulated in this study. Most phase observation errors are attributed to multi-path effects caused by the structure of monuments, where the errors are relatively small against the dry biases found in radiosonde PW.Our results addressed the accuracy of GPS-derived PW with reasonable quality and showed strong temporal and spatial variability of PW due to geographic location. These results suggest that GPSderived PW produced by the Korean regional GPS network has great potential to be used for various meteorological applications and could also contribute global GPS climatology.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Precipitable Water Derived from Ground-Based GPS Measurements with Radiosonde Observations over the Korean Peninsula

Kwon

Iwabuchi

Lim

2007

Journal of the Meteorological Society of Japan

View full text Add to dashboard Cite

show abstract

“…The summer months are represented by the peaks of the seasonal cycles and this is due to moisture increase in the atmosphere during rainy seasons. The four parameter model described by Gradinarsky et al (2002) and Haas et al (2003) is fitted to the data points to display this phenomenon. The linear trend fitted to the data indicates a decrease at a rate of -1.2086 mm/yr.…”

Section: In Te G R a Te D P R E C Ip Ita B Le W A Te R V A P O U Rmentioning

confidence: 99%

Design of a web-based GNSS data management system at HartRAO: preliminary results

Mashaba

Combrinck

Botai

et al. 2016

South African Journal of Geology

View full text Add to dashboard Cite

“…In the last decade, the use of GNSS tropospheric products has been employed to verify the RS trends, which are not homogeneous due to sensor changes. Gradinarsky et al (2002) estimate the water vapour trend using GNSS data over Scandinavia and finds it to be positive, with 0.1-0.2 mm yr −1 for the 1993-2000 period. They also report that winter trends are larger, than summer trends for the southern part of the region and opposite for the northern part.…”

Section: Introductionmentioning

confidence: 99%

The Sofia University Atmospheric Data Archive (SUADA)

2014

View full text Add to dashboard Cite

Abstract. Atmospheric sounding using the Global Navigation Satellite Systems (GNSS) is a well-established research field in Europe. At present, GNSS data from 1800 stations are available for model validation and assimilation in stateof-the-art models used for operational numerical weather prediction centres in Europe. Advances in GNSS data processing make it possible also to use the GNSS data for climatic trend analysis, an emerging new application. In Bulgaria and southeastern Europe, the use of GNSS for atmospheric sounding is currently under development.As a first step, the Sofia University Atmospheric Data Archive (SUADA) is developed. SUADA is a user-friendly database, and includes GNSS tropospheric products like zenith total delay (ZTD) and derivatives like vertically integrated water vapour (IWV), as well as observations from radiosonde (RS) and surface atmospheric data. Archived in SUADA are (1) GNSS tropospheric products (over 12 000 000 individual observations) and derivatives (over 55 000) from five GNSS processing strategies and 37 stations for the period 1997-2013, with temporal resolutions from 5 min to 6 h, and (2) radiosonde IWV data (over 6000 observations) for station Sofia (1999Sofia ( -2012.Presented are two applications of the SUADA data for the study of long-and short-term variations of IWV over Bulgaria during the 2007 heatwave and intense precipitation events in 2012.

show abstract

Climate monitoring using GPS

Cited by 99 publications

References 9 publications

Comparison of Precipitable Water Derived from Ground-Based GPS Measurements with Radiosonde Observations over the Korean Peninsula

Comparison of Precipitable Water Derived from Ground-Based GPS Measurements with Radiosonde Observations over the Korean Peninsula

Design of a web-based GNSS data management system at HartRAO: preliminary results

The Sofia University Atmospheric Data Archive (SUADA)

Contact Info

Product

Resources

About