Seminars and Colloquia

Informal Lunch Seminars take place at NASA's Goddard Institute for Space Studies on Wednesdays at 1 p.m. about twice per month, mostly during the academic year. As of early 2024, these events are "hybrid", i.e., they are presented in person at GISS but may be attended remotely by obtaining connection details from the event host.

GISS staff also organize a Tuesday morning (11 a.m.) series of Sea Level Rise Seminars, presented by scientists from numerous research institutions. This seminar is entirely "virtual" and occurs two or three times per month, year-round.

Other special seminars may occur depending on the schedules of visiting scientists.

Videos of past Lunch Seminars and Sea Level Rise Seminars as well as some tutorials and other events may be found on the GISS YouTube channel.

Schedule

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.

Please consult with the event host/contact for connection details if you wish to remotely join any event marked as "Virtual" or "Hybrid".

This event listing was last updated 2024-05-22. All times shown are New York City local.


May 21, 2024
11 a.m. to 12:15 p.m. — Virtual
Sea Level Rise Seminar
Topic: The Interactions Between Ocean, Ice Shelves, and Sea Ice in the Southeastern Amundsen Sea
Speaker: Yixi Zheng (Univ. East Anglia)
More info: Abstract
Host/Contact: Patrick Alexander

Sea Level Rise Seminar
Speaker: Yixi Zheng (Univ. East Anglia)
Title: The Interactions Between Ocean, Ice Shelves, and Sea Ice in the Southeastern Amundsen Sea


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


Abstract:
Ice shelves buttressing the Antarctic Ice Sheet are losing mass rapidly mainly due to oceanic melt. Here we focus on the interactions between ocean, ice shelf, and sea ice in the southeastern Amundsen Sea, where the strongest melt has been reported, using multi-platform observations and an idealised model, proposing physical mechanisms controlling those interactions. The first part presents the first observed winter meltwater distribution near Pine Island Ice Shelf, using hydrographic profiles collected by tagged seals, revealing a highly variable meltwater distribution with two meltwater-rich layers connected by irregularly- spaced meltwater-rich columns. Year-round observations demonstrate that, due to the reduced vertical stratification, a substantial proportion of the meltwater rises to the surface in winter without undergoing intense mixing, providing near-surface heat to maintain polynyas, and nutrients to boost marine production. Velocity measurements in 2019 reveal a small ocean gyre in a habitually ice-covered region to the west of Thwaites Ice Shelf for the first time. This gyre rotates anti-cyclonically, despite the climatologically cyclonic wind stress curl the Amundsen Sea. We use an idealised barotropic model to reproduce key features of the observed gyres. It shows that the presence of sea ice and/or ice shelves alters the magnitude of the integrated ocean surface stress curl, and hence regulates ocean gyre direction and strength, potentially allowing the gyre to rotate in the opposite sense to the wind stress curl.


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May 22, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar
Speaker: Martina Grecequet and Carolina Guerrero (Nature Journals)
Host/Contact: Maggie DeLessio
May 28, 2024
11 a.m. to 12:15 p.m. — Virtual
Sea Level Rise Seminar
Topic: Mass Loss of Greenland Peripheral Glaciers
Speaker: Laura Larocca (Univ. Arizona)
Host/Contact: Patrick Alexander
May 29, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar & Discussion
Topic: Value-laden research and climate interventions
Speaker: Dan Li and Ryan O'Loughlin (CUNY)
Host/Contact: Maggie DeLessio
June 5, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar
Speaker: Veronika Eyring (DLR Inst Atmospheric Physics)
Host/Contact: Maggie DeLessio
June 10, 2024
8:30 a.m. to 6 p.m.— Hybrid
Workshop on the Use of Climate Models in Mission Design
Host/Contact: Ann Fridlind
June 10, 2024
11 a.m. to 12:15 p.m.
Special Seminar
Topic: Climate Feedbacks: Where are the loops?
Speaker: Mark Webb (UK Met Office)
Host/Contact: Kate Marvel
June 11, 2024
8:30 a.m. to 6 p.m.— Hybrid
Workshop on the Use of Climate Models in Mission Design
Host/Contact: Ann Fridlind
June 12, 2024
8:30 a.m. to 6 p.m.— Hybrid
Workshop on the Use of Climate Models in Mission Design
Host/Contact: Ann Fridlind
June 18, 2024
11 a.m. to 12:15 p.m. — Virtual
Sea Level Rise Seminar
Topic: Interactions between ice sheets, sea level and the solid earth using E3SM
Speaker: Holly Han (JPL)
Host/Contact: Patrick Alexander
June 26, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar
Speaker: Athanasios Nenes (EPFL)
Host/Contact: Maggie DeLessio
July 17, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar
Speaker: Jennifer Sleeman (Univ. Maryland)
Host/Contact: Maggie DeLessio
July 24, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar
Speaker: Winslow Hansen (Cary Inst. Ecosystem Studies)
Host/Contact: Maggie DeLessio
August 27, 2024
11 a.m. to 12:15 p.m. — Virtual
Sea Level Rise Seminar
Speaker: Paul Bierman (Univ. Vermont)
Host/Contact: Patrick Alexander
September 25, 2024
1 p.m. to 2:15 p.m.— Hybrid
GISS Lunch Seminar
Speaker: Michael Gerrard (Columbia Univ. Sabin Center)
Host/Contact: Maggie DeLessio

Meetings and Workshops

Forthcoming meetings, workshops, and other special events that will be hosted by GISS staff include the following:

NASA/GSFC-ESD Workshop on the Use of Climate Models in Satellite Mission Design

June 10-12, 2024. For information, contact Ann Fridlind.

+ Past Meeting & Workshop Reports

Security Note

Federal regulations require that visitors to NASA/GISS arrange in advance for a building pass. Persons planning to attend a GISS seminar or colloquium held on-site at the institute should contact the event host several days in advance of the event for assistance.

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.

Due to implementation of the REAL ID Act (2005), a passport, state driver's license or state identification card is required for admittance to the GISS premises, which is considered a federal facility. Please note that we expect that in May 2025 a state-issued license or ID will need to be REAL-ID compliant in order to be accepted.

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.