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A Refined Regional Model for Estimating Pressure, Temperature, and Water Vapor Pressure for Geodetic Applications in China

Junyu Li, Bao Zhang, Yibin Yao, Lilong Liu, Zhangyu Sun, Xiao Yan
2020 Remote Sensing  
Through these efforts, we build a new regional model named Chinese pressure, temperature, and water vapor pressure (CPTw), which has the advanced resolution of 0.25° × 0.25° and temporal resolution of  ...  Since the CPTw model can provide accurate empirical pressure, temperature, and water vapor pressure for any time and location in China and its surrounding areas, it can not only meet the need of empirical  ...  Acknowledgments: The authors would like to thank the European Centre for Medium-Range Weather Forecasts (ECMWF) for providing ERA5 reanalysis data and the University of Wyoming for providing radiosonde  ... 
doi:10.3390/rs12111713 fatcat:idrhrkqbmja5bdcisgdu4wyzxq

Determination of Tropospheric Parameters from ERA Surface Data for Space Geodetic Techniques

Wei Li, Yujin He
2021 Remote Sensing  
This study investigates methods of deriving meteorological parameters needed in space geodetic applications, from the surface data of the numerical weather model (NWM).  ...  Based on more realistic assumptions for the structure of the troposphere, formulas for accurate vertical reduction of pressure (P) and precipitable water vapor (PWV) are deduced, and they are applied with  ...  of China Earthquake Administration for providing CMONOC ZTD data, and the BKG GNSS Data Center for EPN ZTD data.  ... 
doi:10.3390/rs13193813 fatcat:ecs2ggk645boxlpj5hrglmyywe

A New Approach for the Development of Grid Models Calculating Tropospheric Key Parameters over China

Ge Zhu, Liangke Huang, Lilong Liu, Chen Li, Junyu Li, Ling Huang, Lv Zhou, Hongchang He
2021 Remote Sensing  
The accuracy of the CTrop model in regards to pressure, water vapor pressure, temperature, and weighted mean temperature are 5.51 hPa, 2.60 hPa, 3.09 K, and 3.35 K, respectively, achieving an improvement  ...  Pressure, water vapor pressure, temperature, and weighted mean temperature (Tm) are tropospheric parameters that play an important role in high-precision global navigation satellite system navigation (  ...  Acknowledgments: The authors would like to thank NASA for providing the MERRA-2 grid data and IGRA (Integrated Global Radiosonde Archive) for providing the radiosonde data in this study.  ... 
doi:10.3390/rs13173546 fatcat:ked566gi4zdt5fpqeuwrf75wi4

The Use of GPS Measurements for Water Vapor Determination

Lennart Bengtsson, Gary Robinson, Rick Anthes, Kazumasa Aonashi, Alan Dodson, Gunnar Elgered, Gerd Gendt, Robert Gurney, Mao Jietai, Cathryn Mitchell, Morrison Mlaki, Andreas Rhodin (+4 others)
2003 Bulletin of The American Meteorological Society - (BAMS)  
A tmospheric water vapor is the dominant greenhouse gas in the earth's atmosphere, and so quantifying the feedback of water vapor in global warming is therefore of paramount importance.  ...  This feedback is also crucial for other feedback processes, such as snow-sea ice and clouds, that also play a significant role in climate.  ...  Support for the workshop was provided by the U.K. NERC Visitor Programme at the Environmental Systems Science Centre, University of Reading, Reading, United Kingdom.  ... 
doi:10.1175/bams-84-9-1249 fatcat:6tpitxmt7fbxjjfjmry4ys4bie

Development and Assessment of an ALLSSA‐Based Atmospheric Weighted Mean Temperature Model with High Time Resolution for GNSS Precipitable Water Retrieval

Yongchao Ma, Peng Chen, Guochang Xu, Zhiping Lu
2022 Earth and Space Science  
Precipitable water vapor (PWV), as a critical component of the atmosphere, plays a vital role in a series of atmospheric activities, for example, the transmission of atmospheric energy, the evolution of  ...  Therefore, a comprehensive understanding of the spatiotemporal distribution characteristics of water vapor in the atmosphere is of great significance to weather forecasting and climate research.  ...  Acknowledgments The authors would like to thank the European Centre for Medium-Range Weather Forecasts (ECMWF) for providing the ERA5 reanalysis data and the National Oceanic and Atmospheric Administration  ... 
doi:10.1029/2021ea002089 fatcat:pf2wmujkczctjmoz6ghdlhgrqy

An Investigation of Near Real-Time Water Vapor Tomography Modeling Using Multi-Source Data

Laga Tong, Kefei Zhang, Haobo Li, Xiaoming Wang, Nan Ding, Jiaqi Shi, Dantong Zhu, Suqin Wu
2022 Atmosphere  
Global Navigation Satellite Systems (GNSS) tomography is a well-recognized modeling technique for reconstruction, which can be used to investigate the spatial structure of water vapor with a high spatiotemporal  ...  In addition, the accuracy of the refined tomographic model is assessed under both rainy and non-rainy conditions.  ...  Ten-day data from the CORS network in Hong Kong, China, were selected as Conclusions GNSS tomography is a prospective method for the reconstruction of 4D water vapor at high spatiotemporal resolutions  ... 
doi:10.3390/atmos13050752 fatcat:yhztz5zp45hsnmnr6qp2j6t4ea

A New Method for Refining the GNSS-Derived Precipitable Water Vapor Map

Chen Liu, Nanshan Zheng, Kefei Zhang, Junyu Liu
2019 Sensors  
We established a regional weighted mean temperature (Tm) model for this experiment, which introduced a minor difference into the resultant GNSS-derived PWV compared to the previous Tm models.  ...  Abstract: The objective of the study was to put forth an interpolation method (the LZ method) for refining the GNSS-derived precipitable water vapor (PWV) map.  ...  The authors appreciate the International GNSS Service (IGS), the Lands Department of HKSAR, and the Hong Kong Observatory (HKO) for the provision of data and products.  ... 
doi:10.3390/s19030698 fatcat:fccvigqmpfg7hbqm7qkb2qawde

Spatiotemporal Analysis of Actual Evapotranspiration and Its Causes in the Hai Basin

Nana Yan, Fuyou Tian, Bingfang Wu, Weiwei Zhu, Mingzhao Yu
2018 Remote Sensing  
Temperature and NDVI largely explained the increases in ET in 2014 and can be used as indicators to evaluate annual ET and provide early warning for associated issues.  ...  and air pressure were the major factors that influenced interannual ET trends.  ...  Bingfang Wu warrant ETWatch model to calculate ET in Hai Basin. Weiwei Zhu calculated ET in Hai Basin. Mingzhao Yu collected and preprocessed the original data.  ... 
doi:10.3390/rs10020332 fatcat:a4h2nthb7rfibcead2ww754k54

A new global grid-based weighted mean temperature model considering vertical nonlinear variation

Peng Sun, Suqin Wu, Kefei Zhang, Moufeng Wan, Ren Wang
2021 Atmospheric Measurement Techniques  
Global navigation satellite systems (GNSS) have been proved to be an excellent technology for retrieving precipitable water vapor (PWV).  ...  for a GNSS receiver that is located anywhere below the tropopause (assumed to be 10 km), which has significance for applications requiring real-time or near real-time PWV converted from GNSS signals.  ...  KC19111), and the Jiangsu dual creative talents and Jiangsu dual creative teams program projects of Jiangsu Province, China, awarded in 2017. Review statement.  ... 
doi:10.5194/amt-14-2529-2021 fatcat:j2dx44jyn5dbdkev3aakmzgoc4

Multi-Year Variations in Atmospheric Water Vapor in the Baikal Natural Territory According to GPS Observations

Mikhail Dembelov, Yuri Bashkuev
2022 Atmosphere  
measurements with a water vapor radiometer (WVR) during 2020.  ...  Moreover, at the IRKM and ULAZ points, the surface temperature trends in the same period were positive and amounted to +0.4 K and +0.7 K per decade, respectively.  ...  formula [18]: where is the refraction constant, K2 mbar−1 [2]; is the gas constant for water vapor, J K−1 kg−1; and is the weighted “mean temperature” by the water vapor pressure in a conventional  ... 
doi:10.3390/atmos13020258 fatcat:bjell7jypva6hbi7wfwsw4pvce

Annual Glacier-Wide Mass Balance (2000–2016) of the Interior Tibetan Plateau Reconstructed from MODIS Albedo Products

Zhimin Zhang, Liming Jiang, Lin Liu, Yafei Sun, Hansheng Wang
2018 Remote Sensing  
Glaciers in the Tibetan Plateau (TP) play a crucial role in regulating agriculture irrigation, river discharge and the regional/global climate system.  ...  A strong correlation between the mass balance series and air temperature infers that increasing summer air temperature may be one of main reasons for glacier shrinkage of the three studied glaciers.  ...  Acknowledgments: The MODIS daily albedo products were free downloaded at National Snow and Ice Data Center (NSIDC). Dr Marinka Spieß provided the ELA dataset in PIC.  ... 
doi:10.3390/rs10071031 fatcat:3nuohp6f5vc6hloxryvzov57za

Accuracy Evaluation and Analysis of GNSS Tropospheric Delay Inversion from Meteorological Reanalysis Data

Guolin Liu, Guanwen Huang, Ying Xu, Liangyu Ta, Ce Jing, Yu Cao, Ziwei Wang
2022 Remote Sensing  
effectively improved, providing a new solution for the inversion and modeling of regional or global tropospheric delays.  ...  However, due to the random and contingent changes in weather conditions and water vapor factors, the classical tropospheric delay model cannot accurately reflect changes in tropospheric delay.  ...  Acknowledgments: The authors would like to extend their sincere gratitude to IGS, ECEMWF, NASA, and CMA for providing the data. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs14143434 fatcat:pt4m4bd62fe27grdrnjxakmpcy

Growth of a young pingo in the Canadian Arctic observed by RADARSAT-2 interferometric satellite radar

Sergey V. Samsonov, Trevor C. Lantz, Steven V. Kokelj, Yu Zhang
2016 The Cryosphere  
Modeled permafrost aggradation from 1972 to 2014 approximated elevation changes estimated from aerial photographs for that time period.  ...  Taken together, these lines of evidence indicate that uplift is at least in part a result of freezing of the sub-pingo water lens.  ...  Foundation for Innovation, Polar Knowledge Canada S&T Program (project 1516-186), and NWT Geological Survey contribution no. 96.  ... 
doi:10.5194/tc-10-799-2016 fatcat:gm6gpm6uszgm7a4juaam54ukoe

Report of the Geodetic Works in Japan during the Period from January 1983 to December 1986

THE NATIONAL COMMITTEE FOR GEODESY IN JAPAN, THE GEODETIC SOCIETY OF JAPAN
1987 Journal of the Geodetic Society of Japan  
The Coastal Movement Data Center, which is organized by the GSI, the Japan Meteorological Agency, the Hydrographic Department and several universities, has collected and published the tidal records obtained  ...  The Hydrographic Department of Japan (JHD) has been conducting over-sea levelling in the Izu islands area every year since the late 1960's .  ...  (in Japanese) HASHIZUME, M. and T. MIKUMO: Analysis of non-stationary observed data of crustal movements by an applica tion of a multi-variable ARIMA model. Jour. Seismol. Soc.  ... 
doi:10.11366/sokuchi1954.33.115 fatcat:c3oypvlpb5eoxpofce4tjlwhku

Spatio-temporal variability of the wet component of the troposphere – Application to satellite altimetry

Eliana Vieira, Clara Lázaro, M. Joana Fernandes
2019 Advances in Space Research  
The wet component of the troposphere is due to the presence of water vapor and cloud liquid water in the atmosphere and is responsible by a delay in the propagation of the altimeter signals (Wet Path Delay  ...  Due to the high variability of the water vapor distribution, both in space and time, the modeling of WPD is difficult and its correction is one of the main error sources in Satellite Altimetry.  ...  3 2 ' 1    (2.1) where  P' = Pe is the pressure of the dry gas,  P is the air pressure, in Hectopascal [HPa],  e is partial pressure of the water vapor, in HPa,  T is the temperature, in Kelvin  ... 
doi:10.1016/j.asr.2018.11.015 fatcat:6qotkohltvhbpdbujfd3bi4sga
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