The NWS Science and Technology Integration-Modeling Program Office is coordinating with partners to establish a UFS Webinar Series. The goal of these webinars is to share advancements in science and technology in all aspects of the UFS, in both research and operational settings. We welcome speakers from NOAA and other collaborating organizations. Speakers can be recommended using the Speaker Recommendation Form.
The webinars are tentatively held monthly at 3pm EST every second Thursday, and registration is required to participate
Subscribe to announcements of upcoming Webinars here.
When: September 8th, 2022 3pm, EST.
Topic: “Addressing tropical variability and convective gray-zone representation in NOAA’s Unified Forecast System (UFS)”
Presenter: Lisa Bengtsson – University of Colorado, NOAA/ESRL, Boulder, Colorado
Abstract : The weather in the tropics is important for the Earth’s atmospheric circulation pattern, therefore, correctly modeling the seasonal and year-to-year variations in this region is crucial for improving predictions of weather and climate across the world. Weather and climate variability in the tropics is primarily driven by equatorial waves interacting with smaller scale atmospheric convection. These ‘convectively coupled’ equatorial waves are important for global weather prediction because a better description of the weather in the tropics will lead to a better description of the weather in other places, such as the United States. Convectively coupled equatorial waves have been a major modeling challenge from weather to climate scales because the onset and propagation of these waves depends on processes that are only partially accounted for in global weather prediction systems. In this talk I will present recent research that highlights some key aspects needed in the NOAA GFS description of atmospheric convection to improve the interaction between small scale physics and large scale waves. These aspects include improvements in moisture-convection coupling, stochasticity and sub-grid (and cross-grid) convective organization feedbacks. I will also address aspects related to representing cumulus convection in the so-called “convective grey zone regime”, and discuss scale adaptive representation of cumulus convection needed to prepare the GFS for higher global resolution.
Presenter Bio: Dr Lisa Bengtsson is a research scientist at the NOAA ESRL Physical Science Laboratory (PSL). She joined CIRES/NOAA in 2017, after working as a research scientist at the Swedish Meteorological and Hydrological Institute (SMHI) since 2006. Her research interests include parameterization of cumulus convection and model uncertainty . She currently co-leads the NOAA UFSR2O physics development team. Dr. Bengtsson earned her MSc and PhD degrees at Stockholm University in Sweden, and her BSc degree in atmospheric sciences from the University of Wisconsin-Milwaukee, in the USA.