In 2011, Farrell was appointed to the faculty in the Earth System Science Interdisciplinary Center at the University of Maryland, College Park.[3][4] She moved to the Department of Geographical Sciences as an associate professor in 2019.[citation needed] Farrell studies polar oceans and sea ice. She has been involved with several NASA missions, and demonstrated the ability of satellite data to better understand ice-covered water.[5]
Farrell was part of Operation IceBridge, a NASA mission that revealed ridges on sea ice.[6] She leads the NASA ICESat-2 Science Team, which was able to demonstrated that the Arctic lost one third of its volume from 2003, and that glacial lakes were forming under ice in the Antarctic.[7][8][9] Using ICESat-2,[10] Farrell was able to accurately measure the topography of sea ice, which she proposed could be used to map sea ice models.[11] In 2022, anomalously warm weather caused one of the lowest levels of sea ice in modern record.[12]
Alongside her research, Farrell campaigns to improve access to science. In 2021, when no women were nominated to be fellows in the cryosphere section of the American Geophysical Union, she decided not to elect anyone at all.[13]
^Yang, L. Magruder, T. Neumann, H. A. Fricker, S. L. Farrell, K. M. Brunt, A. , D. Hancock, K. Harbeck, M. Jasinski, R. Kwok, N. Kurtz, J. Lee, T. Markus, J. Morison, A. Neuenschwander, S. Palm, S. Popescu, B. Smith, Y. (2019-09-20). "New Earth Orbiter Provides a Sharper Look at a Changing Planet". Eos. Retrieved 2022-12-02.{{cite web}}: CS1 maint: multiple names: authors list (link)