Webinars

Webinar series 2024

Sep 3rd - Nov 6th

Session 3: Introduction to GRASP algorithm open-source uses and applications

Tue 5th Nov, 2024; Wed 6th Nov, 2024 | Dr. Oleg Dubovik, Dr. David Fuertes

The final session of the webinar series will introduce the GRASP (Generalized Retrieval of Aerosol and Surface Properties) open-source algorithm, developed over 30 years. GRASP allows for the retrieval of a wide range of parameters describing atmospheric aerosols, gases, and the underlying surface from various remote sensing observations and their combination. Currently used by major space agencies worldwide, GRASP has been featured in over 60 scientific publications in the past decade. The session, led by the algorithm founders Dr. Oleg Dubovik and the company CEO Dr. David Fuertes, will explore how GRASP works, its applications in areas like air quality monitoring and climate studies, and real-world case studies. This webinar will not be recorded.

⮕ Europe & US

Tue 5th Nov, 4pm CET (Zoom)

⮕ Asia & Middle East

Wed 6th Nov, 10am CET (Zoom)

Get access to session 3

We are having two sessions, suitable for all timezones. Kindly note that the registration link works for either session. Once registered, you will receive a confirmation email. Prior to the day of the webinar we will be sending a second email with the link giving access to the Zoom platform.

Register

Passed sessions

Session 1: Determining PM2.5 mass with Nephelometer optical measurements

Tue 3rd Sept, 2024; Wed 4th Sept, 2024 | Dr. Chong Li

Typically nephelometers use optical measurements to provide information about bulk particulate properties such as size and amount. AirPhoton nephelometers offer features that allow us to use GRASP to pull out additional information from the raw measurements such as size distribution and particulate mass. The SPARTAN network deploys our nephelometers around the globe alongside our filter based particle sampling stations. This provides us a unique data set to compare real time optical measurements and PM 2.5 retrievals with gravimetric based PM 2.5 measurements in a variety of environments and conditions. In our first webinar Dr. Chong Li will present the results of the work she has been doing with GRASP and machine learning to obtain PM2.5 dry mass estimates from AirPhoton nephelometer measurements deployed by the SPARTAN network.

Session 2: Modeling Street Level PM Dispersal

Tue 8th Oct, 2024; Wed 9th Oct, 2024 | Dr. Konstantin Kuznetsov

The use of satellite data for urban pollution monitoring has been studied for over 25 years. The most serious limitations are the lack of spatially high-resolution data and the inability to obtain vertical resolution to understand exposure at ground level. A new generation of higher resolution satellite data for air quality monitoring as well as several techniques for improving ground level exposure estimates are under development. We are applying a new approach which combines satellite data with Computational Fluid Dynamics (CFD) modeling to retrieve road emissions and pollution concentrations at a detailed 1-meter resolution. This method developed by Dr Konstantin Kuznetsov simulates pollution dispersion in urban environments, accounting for factors like buildings, roads, and vegetation.