edu.ucar.opensky::articles:26230 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:37:00.072098 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d79g5rrm https://doi.org/10.5065/D6M043C6 https Related Dataset #1 NCEP FNL Operational Model Global Tropospheric Analyses, continuing from July 1999 https://doi.org/10.5065/DWYZ-Q852 https Related Dataset #2 NCEP GDAS Satellite Data 2004-continuing https://doi.org/10.5065/Z83F-N512 https Related Dataset #3 NCEP ADP Global Upper Air and Surface Weather Observations (PREPBUFR format) https://doi.org/10.5281/zenodo.7447695 https Related Dataset #4 WRF output for the Geophysical Research Letters publication "Potential Impacts of Radio Occultation Data Assimilation on Forecast Skill of Tropical Cyclone Formation in the Western North Pacific" Potential impacts of radio occultation data assimilation on forecast skill of tropical cyclone formation in the Western North Pacific 2023-03-16T00:00:00Z publication https://n2t.org/ark:/85065/d79g5rrm https://doi.org/10.1029/2021GL096750 Teng, Hsu-Feng author Kuo, Ying-Hwa author Done, James M. author UCAR/NCAR - Library publisher This study assesses the potential influence of global navigation satellite system (GNSS) radio occultation (RO) data assimilation on the forecast skill of tropical cyclone formation over the western North Pacific in September-October 2019 through a regional model. Data from the Constellation Observing System for Meteorology, Ionosphere, and Climate mission II are applied. The forecast skill considers the hits and misses for nine developing cases and the false alarms and correct negatives for 23 non-developing cases. Forecasts assimilating GNSS RO data reduce the false alarm ratio by 20% and increase the accuracy rate by 19%, compared to forecasts without GNSS RO data. Assimilation of GNSS RO data increases mid-level moisture around the disturbance centers at the initial time of the forecasts. It also increases low-level vorticity for developing cases but decreases vorticity throughout most of the troposphere for non-developing cases. These lead to improved forecast performance for tropical cyclone formation. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation