JOINT ADVISORY COMMITTEE (JAC)

Paso del Norte Ceilometer Network
Upper Air Studies


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  • ARCHIVED MEETINGS
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Webinar: Atmospheric Sciences. The Paso del Norte Air Basin and Beyond​​

August 22, 2023
9:30a -11:30a MT
10:30 - 12:30p CT
Webinar Zoom Link (click here)

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Dr. Rosa M. Fitzgerald​

​Atmospheric Physics Studies in the PdN Region
 (Click to download presentation)
​
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Dr. William Stockwell​
​New Chemical Approaches for Air Quality Modeling (Click to download presentation)
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Dr. Nakul Karle
​
Meteorological factors Influencing Air Quality: Multi-scale atmospheric circulations and Virga precipitation

project Description

The immediate proximity of Ciudad Juárez and El Paso, together with a complex topography, makes apportionment of air pollution challenging. Ceilometer data, which provides planetary boundary layer heights (PBLHs), in conjunction with other meteorological and air quality data (e.g. aerosol backscatter), help determine the local transport of pollutants across the border and support future required meteorological modeling. Measuring the PBLHs, together with other meteorological parameters, is key to understanding and ultimately mitigating ground-level ozone.
 
A ceilometer measures the cloud-base height and the PBLHs. The PBLH data are important for understanding air pollution development, transport and dispersion, which are integral to modeling and forecasting of ozone and particulate matter. 


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​“The Planetary Boundary Layer (PBL) is that part of the troposphere that is directly influenced by the presence of the Earth’s surface, and responds to surface forcings with a timescale of about an hour or so.”

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A picture of an industrial city (Shangai, China) illustrating how the PBL traps pollutants below it.

​Map of Paso del NORTE NETWORK Ceilometer LOCATION

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oUR CEILOMETERS

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Vaisala C51 located in UTEP, El Paso, Texas
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Ceilometer C31 located in Juárez, Chihuahua

PUBLICATIONS

pbl impacts

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Aerosol backscatter plot for all four high ozone days showing the shallow aerosol layer, June 4-7, 2017.
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Aerosol backscatter during all three low ozone days showing the deep aerosol layer, June 11-13, 2017

Meteorological Drivers of Ozone Episodes

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1. Daily hourly ozone concentration in ppbv (top, 1); 2. downward solar radiation (Sdw), photolysis frequencies of NO2 (red) and O3 (green) , 3. maximum daily PBLH in (km), and 4. afternoon average wind speeds in black and daily maximum air temperature in red, for the year 2019. The blue line at the top marks the 71 ppbv of ozone level.

Virga Studies Using Ceilometers

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MODEL SIMULATIONS

Publication:
Suhail Mahmud, Nakul Karle, Rosa M. Fitzgerald, Duanjun Lu, Nicholas Nalli, William R. Stockwell, Intercomparison of Sonde, WRF/CAMx and Satellite Sounder Profile Data for the Paso Del Norte Region”,  Aerosol Science and Engineering,4, 277-292, 2020.

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aKNOWLEDGMENTS

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UTEP:
​
Dr. Rosa Fitzgerald, Prinicipal investigator

Dr. Nakum Karle
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UACJ:
Dr. Adrián F. Vázquez Gálvez
Mta. Yazmín G. Hernández
Ing. Frida Y. Toquinto Manjarrez
Adrián V. Peña López

     © JAC COPYRIGHT 2025. ALL RIGHTS RESERVED.
  • ABOUT
    • History
    • BY-LAWS/ Operating Procedures
    • Committee Members
    • PHOTO GALLERY
  • 91st MEETING
  • Binational Air Quality Fund
    • Fund Committee >
      • 16th Meeting
      • 15th Meeting
      • 14th Meeting
      • 13th Meeting
      • 12th Meeting
    • ARCHIVED MEETINGS >
      • 6th Meeting
      • 7th Meeting
      • 8th Meeting
      • 9th Meeting
      • 10th Meeting
      • 11th Meeting
    • Guidance and procurement documents
    • Resolution
    • Official Correspondence
    • About
  • ARCHIVED MEETINGS
    • 90TH MEETING
    • 89TH MEETING
    • 88TH MEETING
    • 87TH MEETING
    • 86TH MEETING
    • 85TH MEETING
    • 84TH MEETING
  • Air Quality Information
    • Paso del Norte Cielometer Network
    • RESOURCES
    • AIR QUALITY RESEARCH REPORTS
    • Low-Cost Air Sensor Study
    • Quality Assurance and Control
  • AIR QUALITY EXCELLENCE AWARD
    • About
    • RESOLUTION
    • Nomination Guidelines
    • Nomination Form
  • Español
  • English
  • Useful Links
  • Contact Us
  • Press Release