Department Seminars
Environmental and Climate Sciences Department (ECSD) seminars are typically scheduled on Thursdays at 11 a.m. in the Large Conference Room in Bldg. 490. Special times, dates, and locations are indicated on the schedule.
These seminars are all open to the public. Seminar attendees who do not have a BNL ID badge should arrive up to 30 minutes prior to the start of the seminar and check-in at the Main Gate. A government-issued photo ID is required at check in. Inform the gate attendee that you are here for the Environmental and Climate Sciences Department seminar (ECSD seminar).
For other details, or to schedule a seminar, contact the Seminar Committee.
Upcoming Seminars
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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
3 pm, Large Conference Room, Bldg. 490
Wednesday, December 18, 2019, 3:00 pm
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.
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FEB
13
Thursday
Environmental & Climate Sciences Department Seminar
"Tropical Deep Convection and Entrainment in Idealized Cloud-Resolving Models"
Presented by Usama Anber, Environmental & Climate Sciences Dept (BNL)
11 am, Large Conference Room, Bldg. 490
Thursday, February 13, 2020, 11:00 am
Hosted by: Mike Jensen
Global Climate Models (GCMs) are depicted as the holy grail of climate science. However, they are far from reliably simulating the current and future climate. One of the components that represents a source of errors and biases in these models is the convective parametrization scheme and the ad-hoc treatment of deep convection and entrainment. In this talk, I will focus on two tropical atmospheric events that GCMs struggle to simulate: Amazonian deep precipitating convection, and the Madden Julian Oscillations. I will present how idealized cloud-resolving models (CRMs) coupled with simulated and forced large-scale circulation can capture the essential dynamics of these events. In particular, when diagnosed from the CRMs, I will show that entrainment is merely a response to the convective regime and cannot have a constant rate as GCMs suggest. If time allows, I will also point out to another potential source of biases in the simulated mean climate stemming from the representation of numerical noise damping in the model dynamical core.
Once your seminar date is set, register through the Guest Information System, which will require you to upload a current copy of your CV when registering.
The registration should be completed a minimum of 30 days prior to your seminar date. (If travel is required, then complete the registration 60 days prior to your seminar date.)
To assist you in completing the registration form, below are answers to some of the questions:
| Purpose of Visit: | Speech/Presentation |
| Subject Code: | Environmental Sciences, Atmospheric |
| Access Requested: | Physical on-site Access to BNL |
| Estimated Days: | intermittently <30 days |
| Visit Justification: | Invited Seminar Speaker for the Environmental & Climate Sciences Department Seminar Series. Title of my talk: (insert title) or Topic of my talk: (insert topic) |
| BNL Department: | Environ & Climate Sci. Dept (EE) |
| Research Facility: | None |
| Facility Type: | Non-Security Area |
| Beamline: | None or Unknown |
| Research Type: | Open research |
| Anticipated Start Date: | date you expect to come onsite |
| Anticipated End Date: | date of your last date onsite |
After receiving approval for your visit, Sharon Zuhoski will contact you regarding your travel/lodging arrangements.
