Three-Dimensional Variational Data Assimilation of Ground-Based GPS ZTD and Meteorological Observations during the 14 December 2001 Storm Event over the Western Mediterranean Sea

Cucurull, L.; Vandenberghe, F.; Barker, D.; Vilaclara, E.; Rius, A.
March 2004
Monthly Weather Review;Mar2004, Vol. 132 Issue 3, p749
Academic Journal
The impact of GPS zenith total delay (ZTD) measurements on mesoscale weather forecasts is studied. GPS observations from a permanent European network are assimilated into the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) using its three-dimensional variational data assimilation (3DVAR) system. The case study focuses on a snow storm that occurred during the period of 14–15 December 2001 over the western Mediterranean Sea. The experiments show that the most significant improvement in forecast is obtained when GPS ZTD data are assimilated together with local surface meteorological observations into the model within a cycling assimilation framework. In this case, the root-mean-square (rms) differences between forecasted and observed values are reduced by 1.7% in the wind component, 4.1% in the temperature variable, and 17.8% in the specific humidity field. This suggests the deployment of GPS receivers at surface stations to better initialize numerical weather prediction models during strong storm mesoscale events.


Related Articles

  • Returnable GPS Sonde. Ma Shuqin; Wang Gai; Pan Yi // Journal of Atmospheric & Oceanic Technology;Apr98, Vol. 15 Issue 2, p599 

    This note is intended to discuss the returnable Global Positioning System (GPS) sonde (RGS). RGS, adopting the shape of an aircraft, is 700--1000 g in weight. RGS is carried up into the air by a balloon and continuously transmits atmospheric temperature, humidity, and wind data to the ground. As...

  • Calibration of Temperature in the Lower Stratosphere from Microwave Measurements Using COSMIC Radio Occultation Data: Preliminary Results. Shu-Peng Ho; Goldberg, Mitch; Ying-Hwa Kuo; Cheng-Zhi Zou; Schreiner, William // Terrestrial, Atmospheric & Oceanic Sciences;Feb2009, Vol. 20 Issue 1, p87 

    Accurate, consistent, and stable observations from different satellite missions are crucial for climate change detection. In this study, we use Global Positioning System (GPS) Radio Occultation (RO) data from the early phase of the FORMOSAT-3/Constellation Observing System for Meteorology,...

  • Characteristics of meteorological factors over different landscape types during dust storm events in Cele, Xinjiang, China. Mao, Donglei; Lei, Jiaqiang; Li, Shengyu; Zeng, Fanjiang; Wang, Cui; Zhou, Jie // Journal of Meteorological Research;Aug2014, Vol. 28 Issue 4, p576 

    Landscape characteristics influence meteorological factors, thus affect the occurrence and nature of dust storm events. The present study investigates the spatiotemporal characteristics of six meteorological factors (wind velocity, wind direction, air temperature, relative humidity (RH), photo...

  • Statistical Characteristics of Unsteady Storms in Radar Observations for the Beijing-Tianjin Region. Wang, Yu; Wang, Hong-Qing; Han, Lei; Lin, Yin-Jing; Zhang, Yan // Journal of Applied Meteorology & Climatology;Jan2015, Vol. 54 Issue 1, p106 

    This study was designed to provide basic information for the improvement of storm nowcasting. According to the mean direction deviation of storm movement, storms were classified into three types: 1) steady storms (S storms, extrapolated efficiently), 2) unsteady storms (U storms, extrapolated...

  • The Role of GPS Precipitable Water Vapor and Atmosphere Stability Index in the Statistically Based Rainfall Estimation Using MTSAT Data. Yuga Suseno, Dwi Prabowo; Yamada, Tomohito J. // Journal of Hydrometeorology;Dec2013, Vol. 14 Issue 6, p1922 

    A rainfall estimation method was developed based on the statistical relationships between cloud-top temperature and rainfall rates acquired by both the 10.8-μm channel of the Multi-Functional Transport Satellite (MTSAT) series and the Automated Meteorological Data Acquisition System (AMeDAS)...

  • Use of Radio Occultation to Evaluate Atmospheric Temperature Data from Spaceborne Infrared Sensors. Yunck, Thomas P.; Fetzer, Eric J.; Mannucci, Anthony M.; Ao, Chi O.; Irion, F. William; Wilson, Brian D.; Manipon, Gerald John M. // Terrestrial, Atmospheric & Oceanic Sciences;Feb2009, Vol. 20 Issue 1, p71 

    With its high accuracy, stability, and worldwide coverage GPS radio occultation offers an attractive means of independently validating and calibrating the world's premier weather and climate sensors. These include such instruments as AIRS, AMSU, and MODIS on NASA's EOS platforms, and similar...

  • Advances and limitations of atmospheric boundary layer observations with GPS occultation over southeast Pacific Ocean. Xie, F.; Wu, D. L.; Ao, C. O.; Mannucci, A. J.; Kursinski, E. R.; Garreaud, R. // Atmospheric Chemistry & Physics;2012, Vol. 12 Issue 2, p903 

    The typical atmospheric boundary layer (ABL) over the southeast (SE) Pacific Ocean is featured with a strong temperature inversion and a sharp moisture gradient across the ABL top. The strong moisture and temperature gradients result in a sharp refractivity gradient that can be precisely...

  • Exploring atmospheric blocking with GPS radio occultation observations. Brunner, L.; Steiner, A. K.; Scherllin-Pirscher, B.; Jury, M. W. // Atmospheric Chemistry & Physics Discussions;2015, Vol. 15 Issue 24, p35799 

    Atmospheric blocking has been closely investigated in recent years due to its impact on weather and climate, such as heat waves, droughts, and flooding. We use, for the first time, satellite-based observations from Global Positioning System (GPS) radio occultation (RO) and explore their ability...

  • An Integrated Air Data / GPS Navigation System for Helicopters. Mutlu, Taner; Hajiyev, Chingiz // Positioning;May2011, Vol. 2 Issue 2, p103 

    In this study, the integration of two navigation systems Air Data System (ADS) and Global Positioning System (GPS) was aimed. ADS is a widely used navigation system which measures static and total air pressure and the air temperature. ADS has high sampling frequency and poor accuracy, on the...


Read the Article

Courtesy of

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics