Meetings, Workshops, Seminars, and Colloquia

Most seminars and colloquia at NASA/GISS are presented during the academic year, September through May.

Formal seminar presentations by visiting scientists are normally held on Friday (11 a.m.) about twice per month.

Informal lunchtime seminars (usually presented by NASA/GISS, Columbia/EI, and/or Columbia/LDEO scientists) take place on Wednesdays (1 p.m.) about twice per month.

Since late 2019, GISS staff have also organized a Tuesday morning (11 a.m.) series of Sea Level Rise seminars (YouTube) presented by scientists from numerous research institutions. This seminar occurs two or three times per month.

Following are upcoming seminars, workshops and other events of interest to GISS staff and to our research partners. Please note that due to security regulations, as described elsewhere on this page, presentations on the GISS premises are not open to the general public.

Events marked "Virtual Only" are presented on-line for remote attendance only. Please consult with the event host/contact for connection details.

This event listing was last updated 2022-05-16. All times shown are New York City local.


May 17, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Topic: Future coupled Greenland ice sheet and climate evolution as simulated with CESM-CISM
Speaker: Miren Vizcaino (Delft Univ. Tech.)
More info: Abstract
Host/Contact: Craig Rye

Sea Level Rise Seminar
Speaker: Miren Vizcaino (Delft Univ. Tech.)
Title: Future coupled Greenland ice sheet and climate evolution as simulated with CESM-CISM


This is an on-line, virtual presentation only. Please consult with event host Craig Rye for connection details.


Abstract:
The Greenland ice sheet (GrIS) is becoming a major contributor to sea level rise, as it responds to atmospheric and ocean warming with increases in surface melt and ice discharge to the ocean. Here, we examine the processes involved in its future century and multi-century evolution with a model that couples high detail in the simulation of surface mass balance (SMB, the balance between surface snow accumulation and ablation from runoff and sublimation), ice dynamics and global climate dynamics, the Community Earth System Model 2 coupled to the Community Ice Sheet Model 2 (CESM2-CISM2). To this end, we use scenario (SSP5-8.5) and idealized one percent increase (to 2xCO2, 2.5xCO2, 3xCO2, and 4xCO2) coupled simulations. In addition, we examine the effects of future atmospheric circulation and sea-ice change on GrIS SMB in century-scale simulations with prescribed present-day GrIS geometry. We also train a neural network with atmospheric variables and melt from CESM to provide the first assessment of GrIS future melt with the full suite of CMIP6 models.


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May 18, 2022
1 p.m. to 2:15 p.m. — Virtual Only
GISS Lunch Seminar
Topic: How does the lapse-rate feedback contribute to Arctic amplification?
Speaker: Olivia Linke (Univ. Leipzig)
More info: Abstract
Host/Contact: Ann Fridlind

GISS Lunch Seminar
Speaker: Olivia Linke (Univ. Leipzig)
Title: How does the lapse-rate feedback contribute to Arctic amplification?


This is an on-line, virtual presentation only. Please consult with event host Ann Fridlind for connection details.


Abstract:
The lapse-rate feedback (LRF) stands out as a dominant driver of Arctic amplification (AA). It contributes equally to the strong Arctic warming as the surface-albedo feedback but is less understood. We use historical simulations of CMIP6 models to compute the LRF warming during the past decades with respect to 1951-1980. The LRF is calculated by a simplified radiative transfer approach including radiative kernels.

Our trend analysis shows that the Arctic LRF is strongly positive during boreal winter with its degree being largely controlled by the reduction in sea ice. The strongest warming trend is observed over regions where sea ice retreats. Over these regions, the annual-mean LRF warming reaches the amount of global warming. In total, the LRF contributed to 20% of the Pan-Arctic annual-mean warming during past decades.

We further use ERA5 reanalyses to evaluate the performance of CMIP6 models to represent the LRF. Breaking down the models into subsets of strong and weak AA shows that the actual warming by the LRF is better represented by strong-AA scenarios. In our analysis, the amount of Arctic amplification itself is defined as the difference between Arctic and global-mean warming. The LRF contributes to AA by being more positive in the Arctic than on global average. We find that the warming by the LRF contributed to AA all year long, with an overall contribution that is comparable to that of the Albedo feedback.


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May 18, 2022
2 p.m. to 3:30 p.m. — Virtual Only
Spring Intern Final Presentations
Host/Contact: Matt Pearce
May 24, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Dan Chavas (Purdue Univ.)
Host/Contact: Craig Rye
May 31, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Dennis Felikson (NASA/GSFC)
Host/Contact: Craig Rye
June 7, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Abigail Bodner (NYU)
Host/Contact: Craig Rye
June 14, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Lennert Stap (Utrecht Univ)
Host/Contact: Craig Rye
June 28, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Erin Petit (Oregon State)
Host/Contact: Craig Rye
July 5, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Christoph Kittel (Univ. Liege)
Host/Contact: Craig Rye
July 12, 2022
11 a.m. to 12:15 p.m. — Virtual Only
Sea Level Rise Seminar
Speaker: Thomas Slater (Leeds Univ)
Host/Contact: Craig Rye

Special Events

There are no workshops, conferences, or other special events (co-)organized by NASA/GISS staff currently announced.

+ Past Meetings & Workshops

Security Note

Federal regulations require that visitors to NASA/GISS arrange in advance for a building pass. Persons attending a GISS seminar or colloquium should contact the event host at least two days in advance of the event for assistance. Please include your affiliation in your e-mail.


Due to implementation of the REAL ID Act (2005), a state driver's license or identification card has been required for admittance to the GISS premises, which is considered a federal facility. However, if you not have a state-issued license or ID that is considered REAL-ID compliant, we urge you to obtain one before one is required to enter a federal facility. Enforcement of this requirement was expected in October 2021, but has been postponed to May 2023 due to the COVID epidemic.


Persons who are not U.S. citizens or U.S. permanent residents and who may be planning a visit to GISS require that special arrangements be made. Please co-ordinate with your GISS host on this at least three weeks before your visit.

All visitors can expect to have their bags searched upon entry to GISS. This may include having to answer questions about personal items, including any medication the visitor may be carrying.