scholarly journals Evaluation of the distribution of subtropical free tropospheric humidity in AMIP-2 simulations using METEOSAT water vapor channel data

2005 ◽  
Vol 32 (19) ◽  
pp. n/a-n/a ◽  
Author(s):  
H. Brogniez ◽  
R. Roca ◽  
L. Picon
Keyword(s):  
Water Vapor ◽  
Vapor Channel

scholarly journals Relationships between Low-Level Jet and Low Visibility Associated with Precipitation, Air Pollution, and Fog in Tianjin

Atmosphere ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1197
Author(s):  
Tingting Ju ◽  
Bingui Wu ◽  
Zhaoyu Wang ◽  
Jingle Liu ◽  
Dehua Chen ◽  
...  
Keyword(s):  
Air Pollution ◽  
Water Vapor ◽  
Air Masses ◽  
Low Level ◽  
Vapor Channel ◽  
Low Visibility ◽  
Low Level Jet ◽  
Industrial Regions ◽  
Statistical Results ◽  
Pm2.5 Concentration

In this study, relationships between low-level jet (LLJ) and low visibility associated with precipitation, air pollution, and fog in Tianjin are investigated based on observational data from January to December, 2016. Statistical results show 55% of precipitation is accompanied by LLJ, and two causes responsible for the relatively high percentage are presented. The result of case analysis shows that some southwesterly LLJs are favorable for the formation of precipitation by transporting water vapor when the water vapor channel from the South China Sea or Bengal Bay to Bohai Rim region is established. Statistical results show 55% of pollution episodes (PEs) are accompanied by LLJs. When pollutions are observed in the southern industrial regions, nocturnal southwesterly LLJ, which can carry polluted air masses from polluted regions to Tianjin and induce turbulent mixing, can enhance surface PM2.5 concentration and is favorable for the formation of surface pollution at night. Nocturnal northerly or southeasterly LLJ leads to clear air masses mixing with polluted air masses and is favorable for increasing visibility. Contributions of southwesterly LLJs to the formation of fog and precipitation are similar, which both rely on establishing the water vapor channel despite occurrence heights of LLJs being different.

scholarly journals Diffuse sunlight based calibration of the water vapor channel in the upc raman lidar

2018 ◽  
Vol 176 ◽  
pp. 05035
Author(s):  
Constantino Muñoz-Porcar ◽  
Adolfo Comeron ◽  
Michaël Sicard ◽  
Ruben Barragan ◽  
David Garcia-Vizcaino ◽  
...  
Keyword(s):  
Water Vapor ◽  
Raman Scattering ◽  
Calibration Factor ◽  
Raman Lidar ◽  
Lidar System ◽  
System Parameters ◽  
Vapor Channel ◽  
Technical University

A method for determining the calibration factor of the water vapor channel of a Raman lidar, based on zenith measurements of diffuse sunlight and on assumptions regarding some system parameters and Raman scattering models, has been applied to the lidar system of Universitat Politècnica de Catalunya (UPC; Technical University of Catalonia, Spain). Results will be analyzed in terms of stability and comparison with typical methods relying on simultaneous radiosonde measurements.

Upper tropospheric humidity and wind fields observed with the METEOSAT water vapor channel

1994 ◽  
Author(s):  
Leopold Van de Berg ◽  
John Whitlock ◽  
Carlos Geijo ◽  
Johannes Schmetz
Keyword(s):  
Water Vapor ◽  
Wind Fields ◽  
Vapor Channel ◽  
Upper Tropospheric Humidity

scholarly journals Correction: Tabata, T., et al. Recalibration of over 35 Years of Infrared and Water Vapor Channel Radiances of the JMA Geostationary Satellites. Remote Sens. 2019, 11, 1189

2020 ◽  
Vol 12 (5) ◽  
pp. 861
Author(s):  
Tasuku Tabata ◽  
Viju O. John ◽  
Rob A. Roebeling ◽  
Tim Hewison ◽  
Jörg Schulz
Keyword(s):  
Water Vapor ◽  
Vapor Channel ◽  
Geostationary Satellites

The authors wish to make the following corrections to this paper [...]

Calibration of Meteosat water vapor channel observations with independent satellite observations

2001 ◽  
Vol 106 (D6) ◽  
pp. 5199-5209 ◽  
Author(s):  
Stephen A. Tjemkes ◽  
Marianne König ◽  
Hans-Joachim Lutz ◽  
Leo van de Berg ◽  
Johannes Schmetz
Keyword(s):  
Water Vapor ◽  
Satellite Observations ◽  
Vapor Channel

Determination of wind vectors from METEOSAT water vapor channel data

1981 ◽  
Vol 1 (4) ◽  
pp. 129-132 ◽  
Author(s):  
N. Eigenwillig ◽  
H. Fischer
Keyword(s):  
Water Vapor ◽  
Vapor Channel

scholarly journals First Observation of Mercury Species on an Important Water Vapor Channel in the Southeast Tibetan Plateau

2021 ◽  
Author(s):  
Huiming Lin ◽  
Yindong Tong ◽  
Chenghao Yu ◽  
Long Chen ◽  
Xiufeng Yin ◽  
...  
Keyword(s):  
Water Vapor ◽  
Tibetan Plateau ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Northeast India ◽  
Atmospheric Pollutants ◽  
Mercury Species ◽  
The Tibetan Plateau ◽  
Long Distance ◽  
Vapor Channel

Abstract. The Tibetan Plateau is generally considered to be a significantly clean area owing to its high altitude; however, the transport of atmospheric pollutants from the Indian subcontinent to the Tibetan Plateau has infected the Tibetan environments. Nyingchi is located at the end of an important water vapor channel. In this study, continuous monitoring of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particle-bound mercury (PBM) was conducted in Nyingchi from March 30 to September 3, 2019, to study the influence of the Indian summer monsoon (ISM) on the origin, transport and behavior of mercury. The atmospheric Hg concentrations during the preceding Indian summer monsoon (PISM) period (1.20 ± 0.35 ng m−3, 13.5 ± 7.3 pg m−3, and 11.4 ± 4.8 pg m−3 for GEM, GOM, and PBM, respectively) were relatively higher than those during the ISM period (0.95 ± 0.21 ng m−3, 12.7 ± 14.3 pg m−3 and 8.8 ± 6.0 pg m−3). The average annual total gaseous mercury concentration in the Nyingchi region was obtained using a passive sampler as 1.12 ± 0.28 ng m−3. The GEM concentration showed that the sampling area was very clean. The GEM has several patterns of daily variation during different periods. Stable high GEM concentrations occur at night during PISM, which may be related to the nocturnal boundary layer. High values occurring in the late afternoon during the ISM may be related to long-range transport. The results of the trajectory model demonstrate that the sources of pollutants at Nyingchi are different under the control of different airflow fields. During westerly circulation, pollutants mainly originate from northeast India or Nepal. During the ISM period, the pollutants mainly originate from northeast India, or the Bay of Bengal, and the Indian Ocean. The strong precipitation and vegetation effects on Hg during the ISM resulted in low Hg concentrations transmitted to Nyingchi during this period. Further, principal component analysis showed that long-distance transport, local emissions, meteorological factors, and snowmelt factors are the main factors affecting the local Hg concentration in Nyingchi.

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