Middlebury College, BA (2005)
Oregon State University, MS (2008)
University of Washington, PhD (2013)
Brooke Christen Medley
(Associate Deputy Director for Hydrosphere, Biosphere, and Geophysics)
| Email: | brooke.c.medley@nasa.gov |
| Phone: | 301.614.6705 |
| Org Code: | 610 |
| Address: |
NASA/GSFC Mail Code 610.9 Greenbelt, MD 20771 |
| Employer: |
Missions & Projects
Research Interests
Ice-sheet surface processes
Solar System: Ice SheetsNear surface processes such as snow accumulation and melt, firn compaction cause short-term fluctuations in ice-sheet surface elevation, which if not accounted for, can mask the underlying long-term dynamic thickness changes. I am interested in developing methods to measure these processes remotely using airborne and satellite remote sensing.
Recent changes in ice-sheet climate
Solar System: Ice SheetsAnnual records of snow accumulation derived from both shallow firn cores and remotely sensed observations provide key insight into recent climate variability over the polar ice sheets. I am primarily interested in using these records to not only understand recent changes in the surface climate but to also evaluate global and regional atmospheric models of net precipitation where observations are few.
Positions/Employment
Postdoctoral Research Fellow
NASA - Goddard Space Flight Center, Greenbelt, MD
November 2013 - April 2015
Research Scientist
NASA - Goddard Space Flight Center, Greenbelt, MD
April 2015 - Present
Education
Publications
Refereed
2023. "Role of Snowfall Versus Air Temperatures for Greenland Ice Sheet Melt‐Albedo Feedbacks." Earth and Space Science 10 (11): [10.1029/2023ea003158] [Journal Article/Letter]
2023. "Polar Firn Properties in Greenland and Antarctica and Related Effects on Microwave Brightness Temperatures." The Cryosphere 17 2793–2809 [10.5194/tc-17-2793-2023] [Journal Article/Letter]
2023. "A wind-driven snow redistribution module for Alpine3D v3.3.0: Adaptations designed for downscaling ice sheet surface mass balance." Geoscientific Model Development [10.5194/gmd-2022-28] [Journal Article/Letter]
2023. "An evaluation of a physics-based firn model and a semi-empirical firn model across the Greenland Ice Sheet (1980–2020)." The Cryosphere 17 (5): 2185-2209 [10.5194/tc-17-2185-2023] [Journal Article/Letter]
2023. "Evaluating Greenland Surface-Mass-Balance and Firn-Densification Data Using ICESat-2 Altimetry." The Cryosphere [10.5194/tc-17-789-2023] [Journal Article/Letter]
2022. "Predicting Antarctic Net Snow Accumulation at the Kilometer Scale and Its Impact on Observed Height Changes." Geophysical Research Letters 49 (20): [10.1029/2022gl099330] [Journal Article/Letter]
2022. "Simulations of firn processes over the Greenland and Antarctic ice sheets: 1980–2021." The Cryosphere 16 (10): 3971-4011 [10.5194/tc-16-3971-2022] [Journal Article/Letter]
2022. "Response of the East Antarctic Ice Sheet to past and future climate change." Nature 608 (7922): 275-286 [10.1038/s41586-022-04946-0] [Journal Article/Letter]
2021. "High‐spatial‐resolution mass rates from GRACE and GRACE‐FO: Global and ice sheet analyses." Journal of Geophysical Research: Solid Earth 126 (12): e2021JB023024 [10.1029/2021JB023024] [Journal Article/Letter]
2021. "The scientific legacy of NASA's Operation IceBridge." Reviews of Geophysics (59): e2020RG000712 [10.1029/2020rg000712] [Journal Article/Letter]
2021. "Physics-based SNOWPACK model improves representation of near-surface Antarctic snow and firn density." The Cryosphere 15 (2): 1065-1085 [10.5194/tc-15-1065-2021] [Journal Article/Letter]
2021. "Atmospheric River Precipitation Contributed to Rapid Increases in Surface Height of the West Antarctic Ice Sheet in 2019." Geophysical Research Letters [10.1029/2020gl091076] [Journal Article/Letter]
2021. "Microwave Radiometry at Frequencies from 500 to 1400 MHz: An Emerging Technology for Earth Observations." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 1-1 [10.1109/jstars.2021.3073286] [Journal Article/Letter]
2020. "Scoring Antarctic surface mass balance in climate models to refine future projections." The Cryosphere 14 (12): 4719-4733 [10.5194/tc-14-4719-2020] [Journal Article/Letter]
2020. "Temporal and spatial variability in surface roughness and accumulation rate around 88° S from repeat airborne geophysical surveys." The Cryosphere 14 (10): 3287-3308 [10.5194/tc-14-3287-2020] [Journal Article/Letter]
2020. "Interannual variations in meltwater input to the Southern Ocean from Antarctic ice shelves." Nature Geoscience [10.1038/s41561-020-0616-z] [Journal Article/Letter]
2020. "Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes." Science eaaz5845 [10.1126/science.aaz5845] [Journal Article/Letter]
2019. "Significant Spatial Variability in Radar‐Derived West Antarctic Accumulation Linked to Surface Winds and Topography." Geophysical Research Letters 46 (22): 13126-13134 [10.1029/2019gl085363] [Journal Article/Letter]
2019. "Observations of surface mass balance on Pine Island Glacier, West Antarctica, and the effect of strain history in fast-flowing sections." Journal of Glaciology 65 (252): 595-604 [10.1017/jog.2019.36] [Journal Article/Letter]
2019. "Observing and Modeling Ice‐Sheet Surface Mass Balance." Reviews of Geophysics 2018RG000622 [10.1029/2018rg000622] [Journal Article/Letter]
2019. "Enhanced firn densification in high-accumulation shear margins of the NE Greenland Ice Stream." Journal of Geophysical Research: Earth Surface [10.1029/2017jf004604] [Journal Article/Letter]
2019. "A new Regional Climate Model for POLAR-CORDEX: Evaluation of a 30-year Hindcast with COSMO-CLM2 over Antarctica." Journal of Geophysical Research: Atmospheres [10.1029/2018jd028862] [Journal Article/Letter]
2019. "Increased snowfall over the Antarctic Ice Sheet mitigated twentieth-century sea-level rise." Nature Climate Change 9 (1): 34-39 [10.1038/s41558-018-0356-x] [Journal Article/Letter]
2018. "The Signature of Ozone Depletion in Recent Antarctic Precipitation Change: A Study With the Community Earth System Model." Geophysical Research Letters 45 (23): 12,931-12,939 [10.1029/2018gl078608] [Journal Article/Letter]
2018. "Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 2: Antarctica (1979–2016)." The Cryosphere 12 (4): 1479-1498 [10.5194/tc-12-1479-2018] [Journal Article/Letter]
2018. "A Multilayer Surface Temperature, Surface Albedo, and Water Vapor Product of Greenland from MODIS." Remote Sensing 10 (4): 555 [10.3390/rs10040555] [Journal Article/Letter]
2018. "Temperature and snowfall in western Queen Maud Land increasing faster than climate model projections." Geophysical Research Letters 45 (3): 1472-1480 [10.1002/2017gl075992] [Journal Article/Letter]
2017. "Climate and surface mass balance of coastal West Antarctica resolved by regional climate modelling." Annals of Glaciology 1-13 [10.1017/aog.2017.42] [Journal Article/Letter]
2017. "Regional Antarctic snow accumulation over the past 1000 years." Climate of the Past 13 (11): 1491-1513 [10.5194/cp-13-1491-2017] [Journal Article/Letter]
2017. "Observationally constrained surface mass balance of Larsen C ice shelf, Antarctica." The Cryosphere 11 (6): 2411-2426 [10.5194/tc-11-2411-2017] [Journal Article/Letter]
2017. "Snow accumulation variability on a West Antarctic ice stream observed with GPS reflectometry, 2007-2017." Geophysical Research Letters 44 (15): 7808-7816 [10.1002/2017gl074039] [Journal Article/Letter]
2017. "How much, how fast?: A science review and outlook for research on the instability of Antarctica's Thwaites Glacier in the 21st century." Global and Planetary Change 153 16-34 [10.1016/j.gloplacha.2017.04.008] [Journal Article/Letter]
2016. "Brief Communication: Upper-air relaxation in RACMO2 significantly improves modelled interannual surface mass balance variability in Antarctica." The Cryosphere 10 (1): 459-463 [10.5194/tc-10-459-2016] [Journal Article/Letter]
2015. "Antarctic firn compaction rates from repeat-track airborne radar data: II. Firn model evaluation." Annals of Glaciology 56 (70): 167-174 [10.3189/2015aog70a204] [Journal Article/Letter]
2015. "Antarctic firn compaction rates from repeat-track airborne radar data: I. Methods." Annals of Glaciology 56 (70): 155-166 [10.3189/2015aog70a203] [Journal Article/Letter]
2014. "Improved representation of East Antarctic surface mass balance in a regional atmospheric climate model." Journal of Glaciology 60 (222): 761-770 [10.3189/2014jog14j051] [Journal Article/Letter]
2014. "Constraining the recent mass balance of Pine Island and Thwaites glaciers, West Antarctica, with airborne observations of snow accumulation." The Cryosphere 8 (4): 1375-1392 [10.5194/tc-8-1375-2014] [Journal Article/Letter]
2014. "Marine Ice Sheet Collapse Potentially Under Way for the Thwaites Glacier Basin, West Antarctica." Science 344 (6185): 735-738 [10.1126/science.1249055] [Journal Article/Letter]
2014. "Tropical Pacific Influence on the Source and Transport of Marine Aerosols to West Antarctica*." Journal of Climate 27 (3): 1343-1363 [10.1175/jcli-d-13-00148.1] [Journal Article/Letter]
2013. "Airborne-radar and ice-core observations of annual snow accumulation over Thwaites Glacier, West Antarctica confirm the spatiotemporal variability of global and regional atmospheric models." Geophysical Research Letters 40 (14): 3649-3654 [10.1002/grl.50706] [Journal Article/Letter]
2013. "Ice sheet record of recent sea-ice behavior and polynya variability in the Amundsen Sea, West Antarctica." Journal of Geophysical Research: Oceans 118 (1): 118-130 [10.1029/2012jc008077] [Journal Article/Letter]