Environmental and Climate research at Brookhaven National Lab is focused on aerosol chemistry and microphysics, aerosol related infrastructure, climate and process modeling, cloud processes, data management and software engineering, terrestrial ecosystems, meteorological services, and tracer technologies.
Aerosol Chemistry & Microphysics
Focused on improving process-level understanding of aerosol formation and evolution mechanisms, aerosol absorption, and the direct and indirect influences that aerosols have on clouds, precipitation and climate.
Aerosol Related Infrastructure
Provides measurement capabilities to the DOE Atmospheric Radiation Measurement (ARM) program for long-term measurements of aerosols and their precursors across a global network of ground- and aircraft-based locations.
Climate and Process Modeling
Uses multi-scale process modeling and observational analyses to understand the processes essential to clouds, precipitation, land-atmosphere interactions, and urban impacts.
Cloud Processes
Seeks to improve understanding of microphysical and dynamical processes that impact the lifecycle of clouds to improve their representation in climate models.
Technology Development & Applications and Meteorological Services
Responsible for the maintenance, calibration, data collection and data archiving for the weather instrumentation network associated with BNL's atmospheric dispersion concerns.
Terrestrial Ecosystem Science & Technology
Seeks to improve the representation of ecosystem processes in Earth System Models in order to increase our ability to understand and project global change.
Tracer Technologies
The Tracer Technology Group uses perfluorocarbon tracers as a tool for understanding the processes that transport air, heat, water, and pollutants.
Funding Agencies
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DEC
18
Wednesday
Environmental & Climate Sciences Department Seminar
"Modeling East Asian Dust and Its Radiative Feedbacks"
Presented by Xiaoning Xie, Institute of Earth Environment, Chinese Academy of Sciences, China
11 am, Large Conference Room, Bldg. 490
Wednesday, December 18, 2019, 11:00 am
Hosted by: Yangang Liu
East Asia is a major source of global dust aerosols originating from the Taklamakan desert and the Gobi desert. Over this region, the estimated several hundred Tg per year of dusts are emitted directly into the air and partly transported to downstream land and ocean regions through westerly winds, e.g., eastern China and northern Pacific, which significantly affect the global and regional energy balance, climate and hydrological cycle by dust direct radiative forcing (DRF) and dust-in-snow radiative forcing (SRF) based on previous studies. This study shows the DRF and SRF and their feedbacks on the regional climate and the dust cycle over East Asia through the use of the Community Atmosphere Model version 4 with a Bulk Aerosol Model parameterizations of the dust size distribution (CAM4-BAM). Our results show that SRF increases the eastern Asian dust emissions significantly by 13.7% in the spring, countering a 7.6% decrease in the regional emissions by DRF. We proposed a significant feature of SRF on the Tibetan Plateau (TP) is the creation of a positive feedback loop that affects the dust cycle over eastern Asia through enhancing the TP heat source. Additionally, we also examine the relationship in the interannual variability between the TP heat source and East Asian dust cycle from observations and models to check this new feedback.
The Environmental & Climate Sciences Department is part of the Environment, Biology, Nuclear Science & Nonproliferation Directorate at Brookhaven National Laboratory.
