Seminars will be held at 8:30 am MDT unless otherwise specified
Description: Carbon cycle processes in climate prediction models can have large uncertainties due to carbon flux variability driven by environmental changes. Terrestrial, oceanic, and anthropogenic factors all contribute to changes in atmospheric CO2 concentration over days to decades, and understanding the integration of forcings and feedbacks across scales is key to modeling current and predicting future changes in the carbon cycle.
Description: This session will focus on studies that involve the exchange of energy at Earth’s surface where weather and climate begin. This exchange is strongly influenced by changes in the distributions of clouds and aerosols in Earth’s atmosphere, which in turn are driven in part by perturbations from greenhouse gas and aerosol emissions and changes in atmospheric circulation. Understanding the variability and trends in this complex system is extremely important if weather prediction and climate projections are to be improved at all scales. Talks in this session will address the variability and trends that start with high-quality, well distributed, long-term observations of Earth-system characteristics that drive the system, most notably radiation at Earth’s surface and changes in atmospheric constituents.
Description: Measurements of trace gases can provide insight into a wide range of topics, from quantifying emission changes in response to policy decisions, to inferring variability in fundamental properties of the atmosphere. This session will include the interpretation of measurements of medium- to long-lived trace gases that influence ozone depletion and climate. Implications of these results for understanding the human response to national and international policy decisions, stratospheric ozone recovery, and variability in atmospheric oxidation rates and dynamics on large scales will be highlighted.
Description: Understanding of boundary layer dynamics is fundamental for a wide variety of applications including weather and air quality forecasting and retrospective analysis for understanding emissions, transport, and removals of greenhouse gases, aerosols, and other pollutants. Emerging techniques for reliably measuring and simulating boundary layer dynamics have the potential to reduce uncertainty in forecasts and data analysis that relies on atmospheric chemical transport modeling.
Description: Air quality and climate mitigation efforts require reliable and up to date estimates of emissions from different sources. Regulatory emission inventories have often been limited in scope in terms of gases, sources, spatio-temporal scales and have often relied on limited or outdated information. As a result, local and regional emission estimates for anthropogenic and biomass burning sources are often quite uncertain and can be significantly biased. Observations from intensive ground or airborne campaigns, in-situ measurement networks and remote sensing provide objective constraints to quantify and attribute air pollution levels and emissions. Presentations will showcase applications of advanced observing and modeling tools to characterize local and regional sources of a variety of pollutants, including greenhouse gases, criteria pollutants and air toxics at the local and regional scales.
Description: GML maintains long-term UTLS and stratospheric records of water vapor, ozone, and ozone depleting substances, and since 2012, regular records of greenhouse and other trace gases using the AirCore. This session will be focused on all aspects of long-term UTLS and stratospheric observations and change on all timescales, as related to the anthropogenic drivers and associated climate feedbacks in both hemispheres. Attribution of observed and modeled long-term change will be discussed in this session as well as the need for strong and reliable observational constraints. We also emphasize the importance of maintaining long-term atmospheric composition observations in the UTLS and stratosphere with current and future ground-based and spaceborne platforms.
Description: GML maintains long-term UTLS and stratospheric records of water vapor, ozone, and ozone depleting substances, and since 2012, regular records of greenhouse and other trace gases using the AirCore. This session will be focused on all aspects of long-term UTLS and stratospheric observations and change on all timescales, as related to the anthropogenic drivers and associated climate feedbacks in both hemispheres. Attribution of observed and modeled long-term change will be discussed in this session as well as the need for strong and reliable observational constraints. We also emphasize the importance of maintaining long-term atmospheric composition observations in the UTLS and stratosphere with current and future ground-based and spaceborne platforms.
Description: Rather than having a specific scientific focus, the session is organized at a time convenient for partners in Asia and Oceania to participate. While the focus will be carbon cycle research, the presentations will cover a range of topics including New Zealand’s Carbowatch program, biomass burning in Australia, results from NIES’s CONTRAIL program, 14CO2 measurements in Korea, CMA’s GHG monitoring program, and more.
Description: New techniques and technologies for monitoring the atmosphere: This session will focus on new or improved analytical methods for atmospheric data collection and could include topics such as new technologies, expanding capabilities, sampling techniques, citizen science, logistical challenges of measurement, and novel use of existing data.
Description: Talks in the session will take an initial look at the analysis of 2020 emissions and atmospheric changes and impacts related to COVID-19.