Brooke Christen Medley

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Brooke Christen Medley

  • RSCH AST, EARTH SCIENCES REMOTE SENS
  • 301.614.6705
  • NASA/GSFC
  • Mail Code: 615
  • Greenbelt , MD 20771
  • Employer: NASA
  • Research Interests

    Ice-sheet surface processes

    Near 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

    Annual 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

    11/2013 - 4/2015

    Postdoctoral Research Fellow

    NASA, Goddard Space Flight Center, Greenbelt, MD
    4/2015 - Present

    Research Scientist

    NASA, Goddard Space Flight Center, Greenbelt, MD

    Education

    Middlebury College, BA (2005)

    Oregon State University, MS (2008)

    University of Washington, PhD (2013)

    Publications

    Refereed

    Konrad, H., A. E. Hogg, R. Mulvaney, et al. R. Arthern, R. J. Tuckwell, B. Medley, and A. Shepherd. 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]

    Lenaerts, J. T., B. Medley, M. R. Broeke, and B. Wouters. 2019. "Observing and Modeling Ice‐Sheet Surface Mass Balance." Reviews of Geophysics, 2018RG000622 [10.1029/2018rg000622]

    Riverman, K. L., R. B. Alley, S. Anandakrishnan, et al. K. Christianson, N. D. Holschuh, B. Medley, A. Muto, and L. E. Peters. 2019. "Enhanced firn densification in high-accumulation shear margins of the NE Greenland Ice Stream." Journal of Geophysical Research: Earth Surface, [10.1029/2017jf004604]

    Souverijns, N., A. Gossart, M. Demuzere, et al. J. T. Lenaerts, B. Medley, I. Gorodetskaya, S. Vanden Broucke, and N. P. van Lipzig. 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]

    Medley, B., and E. R. Thomas. 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]

    Lenaerts, J. T., J. Fyke, and B. Medley. 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]

    van Wessem, J. M., W. J. van de Berg, B. P. Noël, et al. E. van Meijgaard, C. Amory, G. Birnbaum, C. L. Jakobs, K. Krüger, J. T. Lenaerts, S. Lhermitte, S. R. Ligtenberg, B. Medley, C. H. Reijmer, K. van Tricht, L. D. Trusel, L. H. van Ulft, B. Wouters, J. Wuite, and M. R. van den Broeke. 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]

    Hall, D., R. Cullather, N. DiGirolamo, et al. J. Comiso, B. Medley, and S. Nowicki. 2018. "A Multilayer Surface Temperature, Surface Albedo, and Water Vapor Product of Greenland from MODIS." Remote Sensing, 10 (4): 555 [10.3390/rs10040555]

    Medley, B., J. R. McConnell, T. A. Neumann, et al. C. H. Reijmer, N. Chellman, M. Sigl, and S. Kipfstuhl. 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]

    Lenaerts, J. T., S. R. Ligtenberg, B. Medley, et al. W. J. Van de Berg, H. Konrad, J. P. Nicolas, J. M. Van Wessem, L. D. Trusel, R. Mulvaney, R. J. Tuckwell, A. E. Hogg, and E. R. Thomas. 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]

    Thomas, E. R., J. M. van Wessem, J. Roberts, et al. E. Isaksson, E. Schlosser, T. J. Fudge, P. Vallelonga, B. Medley, J. Lenaerts, N. Bertler, M. R. van den Broeke, D. A. Dixon, M. Frezzotti, B. Stenni, M. Curran, and A. A. Ekaykin. 2017. "Regional Antarctic snow accumulation over the past 1000 years." Climate of the Past, 13 (11): 1491-1513 [10.5194/cp-13-1491-2017]

    Kuipers Munneke, P., D. McGrath, B. Medley, et al. A. Luckman, S. Bevan, B. Kulessa, D. Jansen, A. Booth, P. Smeets, B. Hubbard, D. Ashmore, M. Van den Broeke, H. Sevestre, K. Steffen, A. Shepherd, and N. Gourmelen. 2017. "Observationally constrained surface mass balance of Larsen C ice shelf, Antarctica." The Cryosphere, 11 (6): 2411-2426 [10.5194/tc-11-2411-2017]

    Siegfried, M. R., B. Medley, K. M. Larson, H. A. Fricker, and S. Tulaczyk. 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]

    Scambos, T., R. Bell, R. Alley, et al. S. Anandakrishnan, D. Bromwich, K. Brunt, K. Christianson, T. Creyts, S. Das, R. DeConto, P. Dutrieux, H. Fricker, D. Holland, J. MacGregor, B. Medley, J. Nicolas, D. Pollard, M. Siegfried, A. Smith, E. Steig, L. Trusel, D. Vaughan, and P. Yager. 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]

    van de Berg, W. J., and B. Medley. 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]

    Ligtenberg, S., B. Medley, M. Van Den Broeke, and P. K. Munneke. 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]

    Medley, B., S. Ligtenberg, I. Joughin, et al. M. Van Den Broeke, S. Gogineni, and S. Nowicki. 2015. "Antarctic firn compaction rates from repeat-track airborne radar data: I. Methods." Annals of Glaciology, 56 (70): 155-166 [10.3189/2015aog70a203]

    Van Wessem, J., C. Reijmer, M. Morlighem, et al. J. Mouginot, E. Rignot, B. Medley, I. Joughin, B. Wouters, M. Depoorter, J. Bamber, J. Lenaerts, W. De Van Berg, M. Van Den Broeke, and E. Van Meijgaard. 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]

    Medley, B., I. Joughin, B. E. Smith, et al. S. B. Das, E. J. Steig, H. Conway, S. Gogineni, C. Lewis, A. S. Criscitiello, J. R. McConnell, M. R. van den Broeke, J. T. Lenaerts, D. H. Bromwich, J. P. Nicolas, and C. Leuschen. 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]

    Joughin, I., B. E. Smith, and B. Medley. 2014. "Marine Ice Sheet Collapse Potentially Under Way for the Thwaites Glacier Basin, West Antarctica." Science, 344 (6185): 735-738 [10.1126/science.1249055]

    Medley, B., I. Joughin, S. B. Das, et al. E. J. Steig, H. Conway, S. Gogineni, A. S. Criscitiello, J. R. McConnell, B. E. Smith, M. R. van den Broeke, J. T. Lenaerts, D. H. Bromwich, and J. P. Nicolas. 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]

    Publications

    Refereed

    Konrad, H., A. E. Hogg, R. Mulvaney, et al. R. Arthern, R. J. Tuckwell, B. Medley, and A. Shepherd. 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]

    Lenaerts, J. T., B. Medley, M. R. Broeke, and B. Wouters. 2019. "Observing and Modeling Ice‐Sheet Surface Mass Balance." Reviews of Geophysics 2018RG000622 [10.1029/2018rg000622]

    Riverman, K. L., R. B. Alley, S. Anandakrishnan, et al. K. Christianson, N. D. Holschuh, B. Medley, A. Muto, and L. E. Peters. 2019. "Enhanced firn densification in high-accumulation shear margins of the NE Greenland Ice Stream." Journal of Geophysical Research: Earth Surface [10.1029/2017jf004604]

    Souverijns, N., A. Gossart, M. Demuzere, et al. J. T. Lenaerts, B. Medley, I. Gorodetskaya, S. Vanden Broucke, and N. P. van Lipzig. 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]

    Medley, B., and E. R. Thomas. 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]

    Lenaerts, J. T., J. Fyke, and B. Medley. 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]

    van Wessem, J. M., W. J. van de Berg, B. P. Noël, et al. E. van Meijgaard, C. Amory, G. Birnbaum, C. L. Jakobs, K. Krüger, J. T. Lenaerts, S. Lhermitte, S. R. Ligtenberg, B. Medley, C. H. Reijmer, K. van Tricht, L. D. Trusel, L. H. van Ulft, B. Wouters, J. Wuite, and M. R. van den Broeke. 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]

    Hall, D., R. Cullather, N. DiGirolamo, et al. J. Comiso, B. Medley, and S. Nowicki. 2018. "A Multilayer Surface Temperature, Surface Albedo, and Water Vapor Product of Greenland from MODIS." Remote Sensing 10 (4): 555 [10.3390/rs10040555]

    Medley, B., J. R. McConnell, T. A. Neumann, et al. C. H. Reijmer, N. Chellman, M. Sigl, and S. Kipfstuhl. 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]

    Lenaerts, J. T., S. R. Ligtenberg, B. Medley, et al. W. J. Van de Berg, H. Konrad, J. P. Nicolas, J. M. Van Wessem, L. D. Trusel, R. Mulvaney, R. J. Tuckwell, A. E. Hogg, and E. R. Thomas. 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]

    Thomas, E. R., J. M. van Wessem, J. Roberts, et al. E. Isaksson, E. Schlosser, T. J. Fudge, P. Vallelonga, B. Medley, J. Lenaerts, N. Bertler, M. R. van den Broeke, D. A. Dixon, M. Frezzotti, B. Stenni, M. Curran, and A. A. Ekaykin. 2017. "Regional Antarctic snow accumulation over the past 1000 years." Climate of the Past 13 (11): 1491-1513 [10.5194/cp-13-1491-2017]

    Kuipers Munneke, P., D. McGrath, B. Medley, et al. A. Luckman, S. Bevan, B. Kulessa, D. Jansen, A. Booth, P. Smeets, B. Hubbard, D. Ashmore, M. Van den Broeke, H. Sevestre, K. Steffen, A. Shepherd, and N. Gourmelen. 2017. "Observationally constrained surface mass balance of Larsen C ice shelf, Antarctica." The Cryosphere 11 (6): 2411-2426 [10.5194/tc-11-2411-2017]

    Siegfried, M. R., B. Medley, K. M. Larson, H. A. Fricker, and S. Tulaczyk. 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]

    Scambos, T., R. Bell, R. Alley, et al. S. Anandakrishnan, D. Bromwich, K. Brunt, K. Christianson, T. Creyts, S. Das, R. DeConto, P. Dutrieux, H. Fricker, D. Holland, J. MacGregor, B. Medley, J. Nicolas, D. Pollard, M. Siegfried, A. Smith, E. Steig, L. Trusel, D. Vaughan, and P. Yager. 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]

    van de Berg, W. J., and B. Medley. 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]

    Ligtenberg, S., B. Medley, M. Van Den Broeke, and P. K. Munneke. 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]

    Medley, B., S. Ligtenberg, I. Joughin, et al. M. Van Den Broeke, S. Gogineni, and S. Nowicki. 2015. "Antarctic firn compaction rates from repeat-track airborne radar data: I. Methods." Annals of Glaciology 56 (70): 155-166 [10.3189/2015aog70a203]

    Van Wessem, J., C. Reijmer, M. Morlighem, et al. J. Mouginot, E. Rignot, B. Medley, I. Joughin, B. Wouters, M. Depoorter, J. Bamber, J. Lenaerts, W. De Van Berg, M. Van Den Broeke, and E. Van Meijgaard. 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]

    Medley, B., I. Joughin, B. E. Smith, et al. S. B. Das, E. J. Steig, H. Conway, S. Gogineni, C. Lewis, A. S. Criscitiello, J. R. McConnell, M. R. van den Broeke, J. T. Lenaerts, D. H. Bromwich, J. P. Nicolas, and C. Leuschen. 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]

    Joughin, I., B. E. Smith, and B. Medley. 2014. "Marine Ice Sheet Collapse Potentially Under Way for the Thwaites Glacier Basin, West Antarctica." Science 344 (6185): 735-738 [10.1126/science.1249055]

    Medley, B., I. Joughin, S. B. Das, et al. E. J. Steig, H. Conway, S. Gogineni, A. S. Criscitiello, J. R. McConnell, B. E. Smith, M. R. van den Broeke, J. T. Lenaerts, D. H. Bromwich, and J. P. Nicolas. 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]

                                                                                                                                                                                            
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