Abstract:
Apart from the applications of navigation, positioning, and timing, the Global Navigation Satellite System (GNSS) plays an important role in improving the quality and rel...Show MoreMetadata
Abstract:
Apart from the applications of navigation, positioning, and timing, the Global Navigation Satellite System (GNSS) plays an important role in improving the quality and reliability of numerical weather prediction (NWP) models. However, the difference and contribution of assimilating GNSS-derived zenith total delay (ZTD) and precipitable water vapor (PWV) to forecast results are less investigated, which becomes the focus of this study. A unified method of assimilating GNSS-derived ZTD/PWV is first proposed, and their difference and contribution to the forecasting performance of the Weather Research and Forecasting (WRF) model are quantitatively evaluated by focusing on the multiple meteorological parameters, such as precipitation, relative humidity (RH), temperature, and pressure. In addition, the effects of magnitude and seasonal characteristics of GNSS-derived ZTD/PWV on the WRF model are further analyzed during a case of severe convective weather. Central and eastern China was selected as the study area, and 287 meteorological stations, 452 GNSS/Met stations, and 11 radiosonde stations were selected over the whole year of 2018. Results indicate that the assimilation of GNSS-derived ZTD/PWV, particularly ZTD, enhances the forecast accuracy of different meteorological parameters, and the positive contribution degree increases as the magnitude of GNSS-derived ZTD/PWV increases. Compared with the traditional method, the root mean square error reductions of precipitation, RH, temperature, and pressure generated by a unified method of assimilating GNSS-derived ZTD/PWV are 31.9%/22.7%, 54.6%/44.0%, 44.7%/35.7%, and 37.1%/24.2%, respectively. These results show the feasibility and effectiveness of the proposed data assimilation method and verify the positive contribution of GNSS-derived tropospheric products in improving the performance of the WRF model, especially for severe convective event nowcasting.
Published in: IEEE Transactions on Geoscience and Remote Sensing ( Volume: 63)
Funding Agency:
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Yongjie Ma received the B.Sc. degree in geodesy and surveying engineering from Xi’an University of Science and Technology, Xi’an, China, in 2019, where he is currently pursuing the Ph.D. degree in geodesy and surveying engineering.
His research interest focuses on Global Navigation Satellite System (GNSS) meteorology.
Yongjie Ma received the B.Sc. degree in geodesy and surveying engineering from Xi’an University of Science and Technology, Xi’an, China, in 2019, where he is currently pursuing the Ph.D. degree in geodesy and surveying engineering.
His research interest focuses on Global Navigation Satellite System (GNSS) meteorology.View more
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Qingzhi Zhao received the B.Sc. degree from Shandong Agricultural University, Taian, China, in 2011, the M.Sc. degree from China University of Mining and Technology, Xuzhou, China, in 2014, and the Ph.D. degree from Wuhan University, Wuhan, China, in 2017.
He is an Associate Professor with Xi’an University of Science and Technology, Xi’an, China. His research interests include Global Navigation Satellite System (GNSS) data...Show More
Qingzhi Zhao received the B.Sc. degree from Shandong Agricultural University, Taian, China, in 2011, the M.Sc. degree from China University of Mining and Technology, Xuzhou, China, in 2014, and the Ph.D. degree from Wuhan University, Wuhan, China, in 2017.
He is an Associate Professor with Xi’an University of Science and Technology, Xi’an, China. His research interests include Global Navigation Satellite System (GNSS) data...View more
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Wanqiang Yao received the Ph.D. degree from Chang’an University, Xi’an, China, in 2004.
He is the Dean and a Professor with the College of Geomatics, Xi’an University of Science and Technology, Xi’an. His research interests include 3S integration and applications, and remote sensing and geographical conditions monitoring.
Wanqiang Yao received the Ph.D. degree from Chang’an University, Xi’an, China, in 2004.
He is the Dean and a Professor with the College of Geomatics, Xi’an University of Science and Technology, Xi’an. His research interests include 3S integration and applications, and remote sensing and geographical conditions monitoring.View more
Key Laboratory of Urban Meteorology, China Meteorological Administration, Beijing, China
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Xi’an Meteorological Bureau, Xi’an, China
Hongwu Guo received the B.Sc. degree in computer applications from Xidian University, Xi’an, China, in 2005.
He is a Senior Engineer at the Xi’an Meteorological Bureau, Xi’an. His research interests include numerical forecast model data assimilation.
Hongwu Guo received the B.Sc. degree in computer applications from Xidian University, Xi’an, China, in 2005.
He is a Senior Engineer at the Xi’an Meteorological Bureau, Xi’an. His research interests include numerical forecast model data assimilation.View more
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Jinfang Yin received the B.Sc. and Ph.D. degrees from Zhejiang University, Hangzhou, China, in 2013.
He is a Professor with Chinese Academy of Meteorological Sciences, Beijing, China. His research interests include meteorology, atmospheric physics, and atmospheric environment.
Jinfang Yin received the B.Sc. and Ph.D. degrees from Zhejiang University, Hangzhou, China, in 2013.
He is a Professor with Chinese Academy of Meteorological Sciences, Beijing, China. His research interests include meteorology, atmospheric physics, and atmospheric environment.View more
College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China
Ying Xu received the B.Sc. degree from China University of Geosciences, Wuhan, China, in 2009, the M.Sc. degree from Wuhan University, Wuhan, in 2011, and the Ph.D. degree in Hong Kong Polytechnic University, Hong Kong, China, in 2016.
She is a Professor with Shandong University of Science and Technology, Qingdao, China. Her research interests include Global Navigation Satellite System (GNSS) tropospheric delay application...Show More
Ying Xu received the B.Sc. degree from China University of Geosciences, Wuhan, China, in 2009, the M.Sc. degree from Wuhan University, Wuhan, in 2011, and the Ph.D. degree in Hong Kong Polytechnic University, Hong Kong, China, in 2016.
She is a Professor with Shandong University of Science and Technology, Qingdao, China. Her research interests include Global Navigation Satellite System (GNSS) tropospheric delay application...View more
Key Laboratory of Urban Meteorology, China Meteorological Administration, Beijing, China
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Xi’an Meteorological Bureau, Xi’an, China
Yuan Zhai received the B.Sc. degree from Shenyang Agricultural University, Shenyang, China, in 2008, and the M.Sc. degree from Lanzhou University, Lanzhou, China, in 2014.
She is an Senior Engineer with Xi’an Meteorological Bureau, Xi’an, China. Her research interests include applied meteorology.
Yuan Zhai received the B.Sc. degree from Shenyang Agricultural University, Shenyang, China, in 2008, and the M.Sc. degree from Lanzhou University, Lanzhou, China, in 2014.
She is an Senior Engineer with Xi’an Meteorological Bureau, Xi’an, China. Her research interests include applied meteorology.View more
School of Geodesy and Geomatics, Wuhan University, Wuhan, China
Yibin Yao received the B.Sc., M.S., and Ph.D. degrees (Hons.) in geodesy and surveying engineering from the School of Geodesy and Geomatics, Wuhan University, Wuhan, China, in 1997, 2000, and 2004, respectively.
He is currently a Professor with Wuhan University. He has been the author of more than 100 publications since 2001. His main research interests include Global Navigation Satellite System ionospheric/atmospheric/met...Show More
Yibin Yao received the B.Sc., M.S., and Ph.D. degrees (Hons.) in geodesy and surveying engineering from the School of Geodesy and Geomatics, Wuhan University, Wuhan, China, in 1997, 2000, and 2004, respectively.
He is currently a Professor with Wuhan University. He has been the author of more than 100 publications since 2001. His main research interests include Global Navigation Satellite System ionospheric/atmospheric/met...View more
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Yuting Gao received the B.Sc. degree in geodesy and surveying engineering from the School of Geodesy and Geomatics, Xi’an University of Science and Technology, Xi’an, China, in 2014, the M.S. degree in geodesy and surveying engineering from the College of Geological Engineering and Geomatics, Chang’an University, Xi’an, in 2017, and the Ph.D. degree in geomatics engineering from the University of Calgary, Calgary, AB, Can...Show More
Yuting Gao received the B.Sc. degree in geodesy and surveying engineering from the School of Geodesy and Geomatics, Xi’an University of Science and Technology, Xi’an, China, in 2014, the M.S. degree in geodesy and surveying engineering from the College of Geological Engineering and Geomatics, Chang’an University, Xi’an, in 2017, and the Ph.D. degree in geomatics engineering from the University of Calgary, Calgary, AB, Can...View more
Contents College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Yongjie Ma received the B.Sc. degree in geodesy and surveying engineering from Xi’an University of Science and Technology, Xi’an, China, in 2019, where he is currently pursuing the Ph.D. degree in geodesy and surveying engineering.
His research interest focuses on Global Navigation Satellite System (GNSS) meteorology.
Yongjie Ma received the B.Sc. degree in geodesy and surveying engineering from Xi’an University of Science and Technology, Xi’an, China, in 2019, where he is currently pursuing the Ph.D. degree in geodesy and surveying engineering.
His research interest focuses on Global Navigation Satellite System (GNSS) meteorology.View more
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Qingzhi Zhao received the B.Sc. degree from Shandong Agricultural University, Taian, China, in 2011, the M.Sc. degree from China University of Mining and Technology, Xuzhou, China, in 2014, and the Ph.D. degree from Wuhan University, Wuhan, China, in 2017.
He is an Associate Professor with Xi’an University of Science and Technology, Xi’an, China. His research interests include Global Navigation Satellite System (GNSS) data processing and GNSS meteorology.
Qingzhi Zhao received the B.Sc. degree from Shandong Agricultural University, Taian, China, in 2011, the M.Sc. degree from China University of Mining and Technology, Xuzhou, China, in 2014, and the Ph.D. degree from Wuhan University, Wuhan, China, in 2017.
He is an Associate Professor with Xi’an University of Science and Technology, Xi’an, China. His research interests include Global Navigation Satellite System (GNSS) data processing and GNSS meteorology.View more
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Wanqiang Yao received the Ph.D. degree from Chang’an University, Xi’an, China, in 2004.
He is the Dean and a Professor with the College of Geomatics, Xi’an University of Science and Technology, Xi’an. His research interests include 3S integration and applications, and remote sensing and geographical conditions monitoring.
Wanqiang Yao received the Ph.D. degree from Chang’an University, Xi’an, China, in 2004.
He is the Dean and a Professor with the College of Geomatics, Xi’an University of Science and Technology, Xi’an. His research interests include 3S integration and applications, and remote sensing and geographical conditions monitoring.View more
Key Laboratory of Urban Meteorology, China Meteorological Administration, Beijing, China
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Xi’an Meteorological Bureau, Xi’an, China
Hongwu Guo received the B.Sc. degree in computer applications from Xidian University, Xi’an, China, in 2005.
He is a Senior Engineer at the Xi’an Meteorological Bureau, Xi’an. His research interests include numerical forecast model data assimilation.
Hongwu Guo received the B.Sc. degree in computer applications from Xidian University, Xi’an, China, in 2005.
He is a Senior Engineer at the Xi’an Meteorological Bureau, Xi’an. His research interests include numerical forecast model data assimilation.View more
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Jinfang Yin received the B.Sc. and Ph.D. degrees from Zhejiang University, Hangzhou, China, in 2013.
He is a Professor with Chinese Academy of Meteorological Sciences, Beijing, China. His research interests include meteorology, atmospheric physics, and atmospheric environment.
Jinfang Yin received the B.Sc. and Ph.D. degrees from Zhejiang University, Hangzhou, China, in 2013.
He is a Professor with Chinese Academy of Meteorological Sciences, Beijing, China. His research interests include meteorology, atmospheric physics, and atmospheric environment.View more
College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao, China
Ying Xu received the B.Sc. degree from China University of Geosciences, Wuhan, China, in 2009, the M.Sc. degree from Wuhan University, Wuhan, in 2011, and the Ph.D. degree in Hong Kong Polytechnic University, Hong Kong, China, in 2016.
She is a Professor with Shandong University of Science and Technology, Qingdao, China. Her research interests include Global Navigation Satellite System (GNSS) tropospheric delay application and GNSS meteorology.
Ying Xu received the B.Sc. degree from China University of Geosciences, Wuhan, China, in 2009, the M.Sc. degree from Wuhan University, Wuhan, in 2011, and the Ph.D. degree in Hong Kong Polytechnic University, Hong Kong, China, in 2016.
She is a Professor with Shandong University of Science and Technology, Qingdao, China. Her research interests include Global Navigation Satellite System (GNSS) tropospheric delay application and GNSS meteorology.View more
Key Laboratory of Urban Meteorology, China Meteorological Administration, Beijing, China
State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
Xi’an Meteorological Bureau, Xi’an, China
Yuan Zhai received the B.Sc. degree from Shenyang Agricultural University, Shenyang, China, in 2008, and the M.Sc. degree from Lanzhou University, Lanzhou, China, in 2014.
She is an Senior Engineer with Xi’an Meteorological Bureau, Xi’an, China. Her research interests include applied meteorology.
Yuan Zhai received the B.Sc. degree from Shenyang Agricultural University, Shenyang, China, in 2008, and the M.Sc. degree from Lanzhou University, Lanzhou, China, in 2014.
She is an Senior Engineer with Xi’an Meteorological Bureau, Xi’an, China. Her research interests include applied meteorology.View more
School of Geodesy and Geomatics, Wuhan University, Wuhan, China
Yibin Yao received the B.Sc., M.S., and Ph.D. degrees (Hons.) in geodesy and surveying engineering from the School of Geodesy and Geomatics, Wuhan University, Wuhan, China, in 1997, 2000, and 2004, respectively.
He is currently a Professor with Wuhan University. He has been the author of more than 100 publications since 2001. His main research interests include Global Navigation Satellite System ionospheric/atmospheric/meteorological studies, theories and methods of surveying data processing, and Global Navigation Satellite System (GNSS)/meteorology and high-precision GPS data processing.
Yibin Yao received the B.Sc., M.S., and Ph.D. degrees (Hons.) in geodesy and surveying engineering from the School of Geodesy and Geomatics, Wuhan University, Wuhan, China, in 1997, 2000, and 2004, respectively.
He is currently a Professor with Wuhan University. He has been the author of more than 100 publications since 2001. His main research interests include Global Navigation Satellite System ionospheric/atmospheric/meteorological studies, theories and methods of surveying data processing, and Global Navigation Satellite System (GNSS)/meteorology and high-precision GPS data processing.View more
College of Geomatics, Xi’an University of Science and Technology, Xi’an, China
Yuting Gao received the B.Sc. degree in geodesy and surveying engineering from the School of Geodesy and Geomatics, Xi’an University of Science and Technology, Xi’an, China, in 2014, the M.S. degree in geodesy and surveying engineering from the College of Geological Engineering and Geomatics, Chang’an University, Xi’an, in 2017, and the Ph.D. degree in geomatics engineering from the University of Calgary, Calgary, AB, Canada, in 2021, with a focus on positioning, navigation, and wireless location.
Her main research interests include Global Navigation Satellite System (GNSS) satellite precise positioning and navigation.
Yuting Gao received the B.Sc. degree in geodesy and surveying engineering from the School of Geodesy and Geomatics, Xi’an University of Science and Technology, Xi’an, China, in 2014, the M.S. degree in geodesy and surveying engineering from the College of Geological Engineering and Geomatics, Chang’an University, Xi’an, in 2017, and the Ph.D. degree in geomatics engineering from the University of Calgary, Calgary, AB, Canada, in 2021, with a focus on positioning, navigation, and wireless location.
Her main research interests include Global Navigation Satellite System (GNSS) satellite precise positioning and navigation.View more
