Attend a captivating Award Lecture series featuring groundbreaking research in global environmental change. Explore the work of Dr. Charles Koven and Dr. Bin Zhao, recipients of the Piers J. Seller Mid-Career Award and Global Environmental Change Early Career Award, respectively. Delve into crucial topics such as aerosol formation, climate impact, and modeling techniques. Discover new insights on particle formation mechanisms in various regions, including the Amazon and eastern China. Learn about innovative approaches to simulating organic aerosols and their sources. Examine the relationship between ice crystal size and aerosols in cloud formation. Investigate soil carbon turnover, land carbon cycle feedbacks, and their implications for the Earth's response to CO2 emissions. Gain understanding of permafrost dynamics and their long-term effects. Analyze the impact of elevated CO2 on tree growth and mortality rates. This comprehensive lecture series offers a deep dive into cutting-edge research shaping our understanding of global environmental change.
Global Environmental Change Section Early-Career & Mid-Career Award Lecture - II
Overview
Syllabus
Intro
Small aerosols, big health impact!
New-particle formation (NPF) is the most important source of aerosols
Complicated formation chemistry of secondary organic aerosol (SOA)
Aerosols have potentially important but highly uncertain impact on climate
How to represent organic NPF in models?
Development of NPF schemes within regional and global models
The new WRF-Chem model improves particle number simulations over the Amazon
NPF mechanisms over the Amazon
Global modeling using our new E3SM model show similar results over the Amazon
Contribution of NPF to CCN over the Amazon
The new E3SM model improves simulations of particle size distribution in eastern China
Amine+H,SO, is the dominant NPF mechanism near the surface of eastern China
NPF mechanisms all over the world
SOA model scheme based on the 2D-VBS
Novel organic emission inventory (EI) covering the entire volatility range
The new model and inventory improve the Simulations of OA and SOA
IVOC is the largest source of SOA in China
VCPs, domestic combustion, and biomass open burning are top SOA contributors
Ice crystal size (R.)-aerosol relations modulated by convective strength
WRF-spectral-bin simulations show the key role of ice nucleating particles (INPS)
Observations and modeling indicate polluted continental aerosols contain a fraction of INPS
Response of the optical depth of different cloud types to aerosols
Response of deep convective precipitation to different aerosol types
How do we start to understand soil carbon turnover?
Trees, too, have the property that most of the carbon is in the oldest pools, particularly in tropical forests
Because most of the carbon on Earth is in the tails, we need to focus on what governs the dynamics there
Land carbon cycle feedbacks are a crucial and poorly quantified determinant of the Earth system response to CO, emissions
Isolate temperature from moisture effects by ignoring gridcells that are either too wet or too dry
A simple scaling theory for why temperature Sensitivity is high in cold climates
Vertical mixing by cryoturbation modeled as diffusive transport
Prajected sail Cemissions follow the retreating permafrost boundary and persist long after permafrast has thawed
What happens to trees if they grow taster because of elevated CO? And how sensitive is the answer to whether the causes of large-tree mortality have more to do with size versus age?
Basal area and aboveground biomass both Increase in response to elevated productivity but change is 50% smaller with size-driven large-tree mortality
10% reduction in woody biomass carbon turnover time in size- dependent mortality case
And observations show that mortality rates are already increasing alongside productivity in the Amazon
Conclusions
Taught by
AGU
