Hello, I'm Peidong.
I have a broad interest in Earth science, I started doing research with Prof. Tracey Holloway at UW-Madison on atmospheric chemistry since Fall 2016. Besides, I am also doing research with Dr. Caroline Ummenhofer at Woods Hole Oceanographic Institution (WHOI) in summer 2018 on paleoclimate and physical oceanography.
I am a fan of traveling, nature exploring, photography, and cooking. My favorite place on Earth is Antarctica, since I like cold weather, and that is one reason I came to Madison.
Background: Formaldehyde (HCHO) is considered as one of the most hazardous carcinogens in the ambient air. It is also a precursor of ground level ozone that triggers respiratory diseases. There has a limited number of ground-based monitor stations that measure HCHO on a regular basis. There are also several satellite instruments that observe HCHO and has been used to support the assessment of the ozone production regime combined with satellite-derived nitrogen dioxide.
I am focusing on analyzing spatial-temporal patterns of ambient HCHO both from AQS (Air Quality System from EPA) ground-based monitors and OMI (Ozone Monitoring Instrument from NASA) satellite observations in the U.S. over the past 10 years. I also combine temperature and emission profiles to explain possible drivers of the HCHO patterns shown in both monitor and satellite data.
Background: Cloud computing is an emerging technology that allows individual to have the access to shared high performance computing machines remotely. This shortens the time of processing data and makes computationally expensive works in a relatively low cost.
I work on cloud computing in satellite data in atmospheric chemistry, particularly use Amazon Web Services (AWS) to perform WHIPS (Wisconsin Horizontal Interpolation Program for Satellites) to oversample level 2 satellite product to custom-gridded level 3 satellite product. More information of WHIPS could be found at WHIPS website. We have created a public AWS server with pre-installed WHIPS, please see the tutorial guide for running WHIPS on AWS on your own.
Background: Aerosols are small liquid and solid particles hanging in the ambient air, and aerosol optical depth (AOD) is a measure of the light extinction in the atmosphere by these aerosols. There are satellite instruments that detect AOD, and has been used to infer ground level air quality, especially particulate matter (PM2.5). Regional models such as CMAQ (Community Multiscale Air Quality Model) also has simulations on PM2.5.
I am using an extinction model to calculate AOD from CMAQ and comparing with MODIS (Moderate Resolution Imaging Spectroradiometer) satellite observation of AOD in the U.S. in 2011.