Results 71 to 80 of about 16,743 (236)

Validation of the Atmospheric Boundary Layer Height Estimated from the MODIS Atmospheric Profile Data at an Equatorial Site

Atmosphere, 2020
The atmospheric boundary layer height is important for constraining air pollution and meteorological models. This study attempted to validate the MODIS-estimated atmospheric boundary layer height (ABLH), and variation in the ABLH in Uganda was evaluated.
Silver Onyango, Simon K. Anguma, Geoffrey Andima, Beth Parks   +3 more
doaj   +1 more source

Investigation of Antarctic Precipitable Water Vapor Variability and Trend from 18 Year (2001 to 2018) Data of Four Reanalyses Based on Radiosonde and GNSS Observations

Remote Sensing, 2021
Precipitable water vapor (PWV) plays a vital role in climate research, especially for Antarctica in which meteorological observations are insufficient due to the adverse climate and topography therein. Reanalysis data sets provide a great opportunity for
Zhixiang Mo, Zhaoliang Zeng, Liangke Huang, Lilong Liu, Ling Huang, Lv Zhou, Chao Ren, Hongchang He   +7 more
doaj   +1 more source

The role of the synoptic‐scale conditions in driving fog and mist during the FATIMA July 2022 Sable Island Field program

Quarterly Journal of the Royal Meteorological Society, EarlyView.
ERA5 hourly 325‐m and 1512‐m (a) convergence and (b) vertical motion (actually pressure change with sign reversed to compare with convergence) over Sable Island around the time of an event. The mist (green) and fog (red) occurrences at the surface station are shown at the bottom of the figures. A 325‐m fitted line convergence was positive for the first
Clive E. Dorman, Darko Koračin, Reneta Dimitrova, Ismail Gultepe, Sebastian W. Hoch, Jesus Ruiz‐Plancarte, Qing Wang, Alexei Perelet, H. J. S. Fernando   +8 more
wiley   +1 more source

Machine learning-based retrieval of total column water vapor over land using GMI-sensed passive microwave measurements

GIScience & Remote Sensing
The Global Precipitation Measurement (GPM) Microwave Imager (GMI) is a microwave (MW) radiometer that has near-global coverage and frequent revisit time.
Jiafei Xu, Zhizhao Liu
doaj   +1 more source

Water Vapor Calibration: Using a Raman Lidar and Radiosoundings to Obtain Highly Resolved Water Vapor Profiles

Remote Sensing, 2019
We revised the calibration of a water vapor Raman lidar by co-located radiosoundings for a site in the high European Arctic. For this purpose, we defined robust criteria for a valid calibration.
Birte Solveig Kulla, Christoph Ritter
doaj   +1 more source

Assessments of the Retrieval of Atmospheric Profiles from GNSS Radio Occultation Data in Moist Tropospheric Conditions Using Radiosonde Data

Remote Sensing, 2020
The Global Navigation Satellite System (GNSS) Radio Occultation (RO) retrieved temperature and specific humidity profiles can be widely used for weather and climate studies in troposphere.
Ying Li, Yunbin Yuan, Xiaoming Wang
doaj   +1 more source

Wet tropospheric correction for satellite altimetry using SIRGAS-CON products

Journal of Geodetic Science, 2022
The wet tropospheric correction (WTC) is a required correction to satellite altimetry measurements, mainly due to the atmospheric water vapor delay. On-board microwave radiometers (MWR) provide information for WTC estimation but fail in coastal zones and
Prado Anderson, Vieira Telmo, Pires Nelson, Fernandes Maria Joana   +3 more
doaj   +1 more source

Global Tropopause Altitudes in Radiosondes and Reanalyses [PDF]

Atmospheric Chemistry and Physics, 2018
Abstract. Accurate depictions of the tropopause and its changes are important for studies such as stratosphere-troposphere exchange and climate change.Here, the fidelity of primary lapse-rate tropopause altitudes and double tropopause frequencies in four modern reanalyses (ERA-Interim, JRA-55, MERRA-2, and CFSR) is examined using global radiosonde ...
T. Xian, T. Xian, C. R. Homeyer
openaire   +3 more sources

Impact of Weak‐Constraint Four‐Dimensional Variational data assimilation on the prediction of a sudden stratospheric warming event in 2024

Quarterly Journal of the Royal Meteorological Society, EarlyView.
The Weak‐Constraint Four‐Dimensional Variational (WC‐4DVAR) system markedly improved the analysis and forecasting of the 2024 sudden stratospheric warming (SSW) event. It reduced biases and enhanced 7–9 day predictions of temperature across the SSW life cycle, with the most pronounced gains for winds also during the critical onset period.
Shaoying Li, Weimin Zhang, Shuo Ma, Bainian Liu, Yanlai Zhao, Xiaoqun Cao   +5 more
wiley   +1 more source

Precipitable Water Vapor Retrieval from Shipborne GNSS Observations on the Korean Research Vessel ISABU

Sensors, 2020
We estimate precipitable water vapor (PWV) from data collected by the low-cost Global Navigation Satellite System (GNSS) receiver at a vessel. The dual-frequency GNSS receiver that the vessel ISABU is equipped with that is operated by the Korea Institute
Dong-Hyo Sohn, Byung-Kyu Choi, Yosup Park, Yoon Chil Kim, Bonhwa Ku   +4 more
doaj   +1 more source