Peter Fretwell

Geographic Information Officer

Team

Mapping and GIS team

Links/Websites

General enquiries

For general enquiries please see our contact page.

Peter Fretwell

Geographic Information Officer

Biography

Research interests

My work currently involves geospatial analysis and applied remote sensing across a range of environmental fields. Recent emphasis has been on the use of very high resolution satellite imagery to count and study wildlife, and the construction of digital elevation models such as the Bedmap2 project which mapped the bed topography of Antarctica. Additionally my roll includes supporting BAS science and logistics with mapping and geospatial analysis and updating the Antarctic Digital Database.

Collaborations

Full list of published papers January 2015:

See also https://scholar.google.co.uk/citations?hl=en&user=5qOogLUAAAAJ

Ancel, A., R. Cristofari, et al. (2014). “Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration.” PloS one 9(6): e100404.

Atkinson, A., V. Siegel, et al. (2008). “Oceanic circumpolar habitats of Antarctic krill.” Mar Ecol Prog Ser 362(1): 23.

Barnes, D. K., M. A. Collins, et al. (2011). “The need to implement the Convention on Biological Diversity at the high latitude site, South Georgia.” Antarctic Science 23(04): 323-331.

Belchier, M. and P. Fretwell (2009). “Revised estimates of the aRea of the south GeoRGia and shaG Rocks shelf (ccamlR subaRea 48.3).” CCAMLR Science 16: 167-175.

Black, M., A. Fleming, et al. (2014). “On the Atmospheric Correction of Antarctic Airborne Hyperspectral Data.” Remote Sensing 6(5): 4498-4514.

Cooper, A. P. R. and P. Fretwell (2003). “A placename geography for Antarctica.” Bulletin of the Society of Cartographers 37(2): 53-55.

Dawson, A. G., S. Hampton, et al. (2002). “Defining the centre of glacio‐isostatic uplift of the last Scottish ice‐sheet: the Parallel Roads of Glen Roy, Scottish Highlands.” Journal of Quaternary Science 17(5‐6): 527-533.

Fretwell, P. (2012). “Modelling raised shorelines and patterns of Holocene isostatic rebound in the South Shetland Islands.” Quaternary International 279: 151-152.

Fretwell, P., I. Peterson, et al. (2004). “The use of Gaussian trend surfaces for modelling glacio-isostatic crustal rebound.” Scottish Journal of Geology 40(2): 175-179.

Fretwell, P., H. Pritchard, et al. (2012). “Bedmap2: improved ice bed, surface and thickness datasets for Antarctica.” The Cryosphere Discussions 6(5): 4305-4361.

Fretwell, P., H. D. Pritchard, et al. (2013). “Bedmap2: improved ice bed, surface and thickness datasets for Antarctica.” The Cryosphere 7(1): 375-393.

Fretwell, P., D. Smith, et al. (2008). “The last glacial maximum British–Irish ice sheet: a reconstruction using digital terrain mapping.” Journal of Quaternary Science 23(3): 241-248.

Fretwell, P., A. Tate, et al. (2009). “Compilation of a new bathymetric dataset of South Georgia.” Antarctic Science 21(02): 171-174.

Fretwell, P. T., P. Convey, et al. (2011). “Detecting and mapping vegetation distribution on the Antarctic Peninsula from remote sensing data.” Polar biology 34(2): 273-281.

Fretwell, P. T., D. Hodgson, et al. (2010). “Holocene isostatic uplift of the South Shetland Islands, Antarctic Peninsula, modelled from raised beaches.” Quaternary Science Reviews 29(15): 1880-1893.

Fretwell, P. T., M. A. LaRue, et al. (2012). “An emperor penguin population estimate: the first global, synoptic survey of a species from space.” PloS one 7(4): e33751.

Fretwell, P. T., I. J. Staniland, et al. (2014). “Whales from space: counting southern right whales by satellite.” PloS one 9(2): e88655.

Fretwell, P. T. and P. N. Trathan (2009). “Penguins from space: faecal stains reveal the location of emperor penguin colonies.” Global Ecology and Biogeography 18(5): 543-552.

Fretwell, P. T., P. N. Trathan, et al. (2014). “Emperor penguins breeding on iceshelves.” PloS one 9(1): e85285.

Graham, A. G., P. T. Fretwell, et al. (2008). “A new bathymetric compilation highlighting extensive paleo–ice sheet drainage on the continental shelf, South Georgia, sub‐Antarctica.” Geochemistry, Geophysics, Geosystems 9(7).

Grant, S., S. Hill, et al. (2013). “Spatial distribution of management measures, Antarctic krill catch and Southern Ocean bioregions: implications for conservation planning.” CCAMLR Science 20: 1-19.

Haselwimmer, C. and P. Fretwell (2009). Field reflectance spectroscopy of sparse vegetation cover on the Antarctic peninsula. Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, 2009. WHISPERS’09. First Workshop on, IEEE.

Hodgson, D. A., M. J. Bentley, et al. (2012). “Glacial geomorphology and cosmogenic 10Be and 26Al exposure ages in the northern Dufek Massif, Weddell Sea embayment, Antarctica.” Antarctic Science 24(04): 377-394.

Hoffman, J. I., A. Clarke, et al. (2012). “Unexpected fine-scale population structure in a broadcast-spawning Antarctic marine mollusc.” PloS one 7(3): e32415.

Hughes, K. A., P. Fretwell, et al. (2011). “Untouched Antarctica: mapping a finite and diminishing environmental resource.” Antarctic Science 23(06): 537-548.

LaRue, M. A., G. Kooyman, et al. (2014). “Emigration in emperor penguins: implications for interpretation of long‐term studies.” Ecography.

Martin, A., S. Poncet, et al. (2009). “The white-chinned petrel (Procellaria aequinoctialis) on South Georgia: population size, distribution and global significance.” Polar biology 32(4): 655-661.

Monien, P., S. J. Roberts, et al. “Penguin colony expansion on the western Antarctic Peninsula during Holocene warm phases curtailed by volcanic activity.”

Murphy, E., E. Hofmann, et al. (2013). “Comparison of the structure and function of Southern Ocean regional ecosystems: The Antarctic Peninsula and South Georgia.” Journal of Marine Systems 109: 22-42.

Rose, K. C., F. Ferraccioli, et al. (2013). “Early east Antarctic Ice Sheet growth recorded in the landscape of the Gamburtsev Subglacial Mountains.” Earth and Planetary Science Letters 375: 1-12.

Smellie, J., W. McIntosh, et al. (2006). “The Cape Purvis volcano, Dundee Island (northern Antarctic Peninsula): late Pleistocene age, eruptive processes and implications for a glacial palaeoenvironment.” Antarctic Science 18(03): 399-408.

Smith, D., R. Cullingford, et al. (2007). “Holocene relative sea level changes in a glacio-isostatic area: new data from south-west Scotland, United Kingdom.” Marine geology 242(1): 5-26.

Smith, D., N. Hunt, et al. (2012). “Patterns of Holocene relative sea level change in the North of Britain and Ireland.” Quaternary Science Reviews 54: 58-76.

Smith, D., S. Shi, et al. (2005). “The Holocene Storegga Slide tsunami in the United Kingdom.” Quaternary Science Reviews 24(3): 2291-2322.

Smith, D., S. Shi, et al. (2004). “The holocene storegga slide tsunami in the United Kingdom.” Quaternary Science Reviews 23(23): 2291-2321.

Smith, D. E., P. T. Fretwell, et al. (2006). “Towards improved empirical isobase models of Holocene land uplift for mainland Scotland, UK.” Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364(1841): 949-972.

Tarling, G. A., N. S. Ensor, et al. (2010). “1 An Introduction to the Biology of Northern Krill (Meganyctiphanes norvegica Sars).” Advances in marine biology 57: 1.

Trathan, P. N., P. T. Fretwell, et al. (2011). “First recorded loss of an emperor penguin colony in the recent period of Antarctic regional warming: implications for other colonies.” PloS one 6(2): e14738.

Vaughan, D. G., D. K. Barnes, et al. (2011). “Potential seaways across West Antarctica.” Geochemistry, Geophysics, Geosystems 12(10).

Wakefield, E. D., R. A. Phillips, et al. (2012). “Foraging black-browed albatrosses target waters overlaying moraine banks-a consequence of upward benthic-pelagic coupling?” Antarctic Science 24(03): 269-280.

Watcham, E., M. Bentley, et al. (2011). “A new Holocene relative sea level curve for the South Shetland Islands, Antarctica.” Quaternary Science Reviews 30(21): 3152-3170.

Publications from NERC Open Research Archive

2024

Cubaynes, Hannah C. , Forcada, Jaume , Kovacs, Kit M., Lydersen, Christian, Downie, Rod, Fretwell, Peter T. . (2024) Walruses from space: walrus counts in simultaneous remotely piloted aircraft system versus very high-resolution satellite imagery. Remote Sensing in Ecology and Conservation, 10 (). pp. 10.1002/rse2.391

Roland, Thomas P., Bartlett, Oliver T., Charman, Dan J., Anderson, Karen, Hodgson, Dominic A. , Amesbury, Matthew J., Maclean, Ilya, Fretwell, Peter T. , Fleming, Andrew . (2024) Sustained greening of the Antarctic Peninsula observed from satellites. Nature Geoscience, (). 8 pp. 10.1038/s41561-024-01564-5

Walshaw, Charlotte V., Gray, Andrew, Fretwell, Peter T. , Convey, Peter , Davey, Matthew P., Johnson, Joanne S. , Colesie, Claudia. (2024) A satellite-derived baseline of photosynthetic life across Antarctica. Nature Geoscience, 2024 (). 16 pp. 10.1038/s41561-024-01492-4

Fretwell, Peter . (2024) Four unreported emperor penguin colonies discovered by satellite. Antarctic Science, 36 (). 3 pp. 10.1017/S0954102023000329

LaRue, M., Iles, D., Labrousse, S., Fretwell, P. , Ortega, D., Devane, E., Horstmann, I., Viollat, L., Foster-Dyer, R., Le Bohec, C., Zitterbart, D., Houstin, A., Richter, S., Winterl, A., Wienecke, B., Salas, L., Nixon, M., Barbraud, C., Kooyman, G., Ponganis, P., Ainley, D., Trathan, P. , Jenouvrier, S.. (2024) Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population. Proceedings of the Royal Society B: Biological Sciences, 291 (). 11 pp. 10.1098/rspb.2023.2067

Attard, Marie R.G. , Phillips, Richard A., Bowler, Ellen, Clarke, Penny J. , Cubaynes, Hannah , Johnston, David W., Fretwell, Peter T. . (2024) Review of Satellite Remote Sensing and Unoccupied Aircraft Systems for Counting Wildlife on Land. Remote Sensing, 16 (). 23 pp. 10.3390/rs16040627

Fretwell, Peter . (2024) A 6 year assessment of low sea-ice impacts on emperor penguins [Short Note]. Antarctic Science, 36 (). pp. 10.1017/S0954102024000130

2023

Green, Katherine M. , Virdee, Mala K., Cubaynes, Hannah C. , Aviles-Rivero, Angelica I., Fretwell, Peter T. , Gray, Patrick C., Johnston, David W., Schönlieb, Carola-Bibiane, Torres, Leigh G., Jackson, Jennifer A. . (2023) Gray whale detection in satellite imagery using deep learning. Remote Sensing for Ecology and Conservation, 9 (). 12 pp. 10.1002/rse2.352

Jawak, Shridhar D., Wankhede, Sagar F., Luis, Alvarinho J., Pandit, Prashant H., Convey, Peter , Fretwell, Peter T. , Schulz, Karsten, Nikolakopoulos, Konstantinos G., Michel, Ulrich. (2023) How precisely can we map blue ice in Antarctica?. In: SPIE Remote Sensing Amsterdam, Netherlands, 2023. SPIE. 10.1117/12.2680318

Fretwell, Peter T. , Cubaynes, Hannah C. , Shpak, Olga. (2023) Satellite image survey of beluga whales in the southern Kara Sea. Marine Mammal Science, 39 (). 11 pp. 10.1111/mms.13044

Fretwell, Peter T. , Boutet, Aude, Ratcliffe, Norman . (2023) Record low 2022 Antarctic sea ice led to catastrophic breeding failure of emperor penguins. Communications: Earth & Environment, 4 (). 6 pp. 10.1038/s43247-023-00927-x

Frémand, Alice C. , Fretwell, Peter , Bodart, Julien A., Pritchard, Hamish D. , Aitken, Alan, Bamber, Jonathan L., Bell, Robin, Bianchi, Cesido, Bingham, Robert G., Blankenship, Donald D., Casassa, Gino, Catania, Ginny, Christianson, Knut, Conway, Howard, Corr, Hugh F.J., Cui, Xiangbin, Damaske, Detlef, Damm, Volkmar, Drews, Reinhard, Eagles, Graeme, Eisen, Olaf, Eisermann, Hannes, Ferraccioli, Fausto , Field, Elena , Forsberg, René, Franke, Steven, Fujita, Shuji, Gim, Yonggyu, Goel, Vikram, Gogineni, Siva Prasad, Greenbaum, Jamin, Hills, Benjamin, Hindmarsh, Richard C.A. , Hoffman, Andrew O., Holmlund, Per, Holschuh, Nicholas, Holt, John W., Horlings, Anneka N., Humbert, Anglika, Jacobel, Robert W., Jansen, Daniela, Jenkins, Adrian, Jokat, Wilfried, Jordan, Tom , King, Edward , Kohler, Jack, Krabill, William, Langley, Kirsty, Lee, Joohan, Leitchenkov, German, Leuschen, Carlton, Luyendyk, Bruce, MacGregor, Joseph, MacKie, Emma, Matsuoka, Kenichi, Morlighem, Mathieu, Mouginot, Jérémie, Nitsche, Frank O., Nogi, Yoshifumi, Nost, Ole A., Paden, John, Pattyn, Frank, Popov, Sergey V., Rignot, Eric, Rippin, David M., Rivera, Andrés, Roberts, Jason, Ross, Neil, Ruppel, Anotonia, Schroeder, Dustin M., Siegert, Martin J., Smith, Andrew M. , Steinhage, Daniel, Studinger, Michael, Sun, Bo, Tabacco, Ignazio, Tinto, Kirsty, Urbini, Stefano, Vaughan, David , Welch, Brian C., Wilson, Douglas S., Young, Duncan A., Zirizzotti, Achille. (2023) Antarctic Bedmap data: Findable, Accessible, Interoperable, and Reusable (FAIR) sharing of 60 years of ice bed, surface, and thickness data. Earth System Science Data, 15 (). 16 pp. 10.5194/essd-15-2695-2023

Jawak, Shridhar D., Luis, Alvarinho J., Pandit, Prashant H., Wankhede, Sagar F., Convey, Peter , Fretwell, Peter T. . (2023) Exploratory mapping of blue ice regions in Antarctica using very high resolution satellite remote sensing data. Remote Sensing, 15 (). 40 pp. 10.3390/rs15051287

Cubaynes, Hannah Charlotte , Clarke, Penny Joanna , Goetz, Kimberly Thea, Tyler, Aldrich, Fretwell, Peter Thomas , Leonard, Kathleen Elise, Khan, Christin Brangwynne. (2023) Annotating very high-resolution satellite imagery: A whale case study. MethodsX, 10 (). 10 pp. 10.1016/j.mex.2023.102040

2022

Hodgson, Dominic A. , Jordan, Tom A. , Ross, Neil , Riley, Teal R. , Fretwell, Peter . (2022) Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network. The Cryosphere, 16 (). 13 pp. 10.5194/tc-16-4797-2022

Dorschel, Boris, Hehemann, Laura, Viquerat, Sacha, Warnke, Fynn, Dreutter, Simon, Tenberge, Yvonne Schulze, Accetella, Daniela, An, Lu, Barrios, Felipe, Bazhenova, Evgenia, Black, Jenny, Bohoyo, Fernando, Davey, Craig, De Santis, Laura, Dotti, Carlota Escutia, Fremand, Alice C. , Fretwell, Peter T. , Gales, Jenny A., Gao, Jinyao, Gasperini, Luca, Greenbaum, Jamin S., Henderson Jencks, Jennifer, Hogan, Kelly , Hong, Jong Kuk, Jakobsson, Martin, Jensen, Laura, Kool, Johnathan, Larin, Sergei, Larter, Robert D. , Leitchenkov, German, Loubrieu, Benoît, Mackay, Kevin, Mayer, Larry, Millan, Romain, Morlighem, Mathieu, Navidad, Francisco, Nitsche, Frank O., Nogi, Yoshifumi, Pertuisot, Cécile, Post, Alexandra L., Pritchard, Hamish D. , Purser, Autun, Rebesco, Michele, Rignot, Eric, Roberts, Jason L., Rovere, Marzia, Ryzhov, Ivan, Sauli, Chiara, Schmitt, Thierry, Silvano, Alessandro, Smith, Jodie, Snaith, Helen, Tate, Alex J. , Tinto, Kirsty, Vandenbossche, Philippe, Weatherall, Pauline, Wintersteller, Paul, Yang, Chunguo, Zhang, Tao, Arndt, Jan Erik. (2022) The International Bathymetric Chart of the Southern Ocean Version 2 (IBCSO v2). Scientific Data, 9 (). 13 pp. 10.1038/s41597-022-01366-7

Cubaynes, Hannah , Fretwell, Peter . (2022) Whales from space dataset, an annotated satellite image dataset of whales for training machine learning models. Scientific Data, 9 (). pp. 10.1038/s41597-022-01377-4

Labrousse, Sara, Iles, David, Viollat, Lise, Fretwell, Peter , Trathan, Philip N. , Zitterbart, Daniel P., Jenouvrier, Stephanie, LaRue, Michelle, Pettorelli, Nathalie, Kuemmerle, Tobias. (2022) Quantifying the causes and consequences of variation in satellite‐derived population indices: a case study of emperor penguins. Remote Sensing in Ecology and Conservation, 8 (). pp. 10.1002/rse2.233

2021

Clarke, Penny J. , Cubaynes, Hannah C. , Stockin, Karen A., Olavarría, Carlos, de Vos, Asha, Fretwell, Peter T. , Jackson, Jennifer A. . (2021) Cetacean strandings from space: Challenges and opportunities of very high resolution satellites for the remote monitoring of cetacean mass strandings. Frontiers in Marine Science, 8 (). 18 pp. 10.3389/fmars.2021.650735

Jenouvrier, Stephanie, Che‐Castaldo, Judy, Wolf, Shaye, Holland, Marika, Labrousse, Sara, LaRue, Michelle, Wienecke, Barbara, Fretwell, Peter , Barbraud, Christophe, Greenwald, Noah, Stroeve, Julienne, Trathan, Philip N. . (2021) The call of the emperor penguin: Legal responses to species threatened by climate change. Global Change Biology, 27 (). pp. 10.1111/gcb.15806

Belcher, Anna , Fielding, Sophie , Gray, Andrew, Biermann, Lauren, Stowasser, Gabriele , Fretwell, Peter , Ireland, Louise , Tarling, Geraint A. . (2021) Experimental determination of reflectance spectra of Antarctic krill (Euphausia superba) in the Scotia Sea. Antarctic Science, 33 (). 13 pp. 10.1017/S0954102021000262

Gray, Andrew, Krolikowski, Monika, Fretwell, Peter , Convey, Peter , Peck, Lloyd S. , Mendelova, Monika, Smith, Alison G., Davey, Matthew P.. (2021) Remote sensing phenology of Antarctic green and red snow algae using WorldView satellites.. Frontiers in Plant Science, 12 (). 16 pp. 10.3389/fpls.2021.671981

Fretwell, Peter , Trathan, Phil . (2021) Discovery of new colonies by Sentinel2 reveals good and bad news for emperor. Remote Sensing in Ecology and Conservation, 7 (). pp. 10.1002/rse2.176

Fretwell, Peter . (2021) The Antarctic Digital Database. In: Foscari, Giulia (eds.). Antarctic Resolution, , Lars Müller Publishers, pp.

2020

Fretwell, Peter . ; Foscari, Giulia (eds.). (2020) Antarctic atlas: new maps and graphics that tell the story of a continent. , , Particular Books, 208 pp.

Bamford, C.C.G. , Kelly, N., Dalla Rosa, L., Cade, D.E., Fretwell, P.T. , Trathan, P.N. , Cubaynes, H.C. , Mesquita, A.F.C., Gerrish, L. , Friedlaender, A.S., Jackson, J.A. . (2020) A comparison of baleen whale density estimates derived from overlapping satellite imagery and a shipborne survey. Scientific Reports, 10 (). 12 pp. 10.1038/s41598-020-69887-y

Bowler, Ellen, Fretwell, Peter T. , French, Geoffrey, Mackiewicz, Michal. (2020) Using deep learning to count albatrosses from space: Assessing results in light of ground truth uncertainty. Remote Sensing, 12 (). pp. 10.3390/rs12122026

Gray, Andrew, Krolikowski, Monika, Fretwell, Peter , Convey, Peter , Peck, Lloyd S. , Mendelova, Monika, Smith, Alison G., Davey, Matthew P.. (2020) Remote sensing reveals Antarctic green snow algae as important terrestrial carbon sink. Nature Communications, 11 (). pp. 10.1038/s41467-020-16018-w

Cubaynes, Hannah C. , Rees, W. Gareth, Jackson, Jennifer A. , Moore, Michael, Sformo, Todd L., McLellan, William A., Niemeyer, Misty E., George, John C., van der Hoop, Julie, Forcada, Jaume , Trathan, Phil , Fretwell, Peter T. . (2020) Spectral reflectance of whale skin above the sea surface: a proposed measurement protocol. Remote Sensing in Ecology and Conservation, (). 13 pp. 10.1002/rse2.155

Trathan, Philip N. , Wienecke, Barbara, Barbraud, Christophe, Jenouvrier, Stéphanie, Kooyman, Gerald, Le Bohec, Céline, Ainley, David G., Ancel, André, Zitterbart, Daniel P., Chown, Stephen L., LaRue, Michelle, Cristofari, Robin, Younger, Jane, Clucas, Gemma, Bost, Charles-André, Brown, Jennifer A., Gillett, Harriet J., Fretwell, Peter T. . (2020) The emperor penguin – vulnerable to projected rates of warming and sea ice loss. Biological Conservation, 241 (). pp. 10.1016/j.biocon.2019.108216

2019

Morlighem, Mathieu, Rignot, Eric, Binder, Tobias, Blankenship, Donald, Drews, Reinhard, Eagles, Graeme, Eisen, Olaf, Ferraccioli, Fausto , Forsberg, Rene, Fretwell, Peter , Goel, Vikram, Greenbaum, Jamin S., Gudmundsson, Hilmar, Guo, Jinxue, Helm, Veit, Hofstede, Coen, Howat, Ian, Humbert, Angelika, Jokat, Wilfried, Karlsson, Nanna B., Matsuoka, Kenichi, Millan, Romain, Mouginot, Jeremie, Paden, John, Pattyn, Frank, Roberts, Jason, Rosier, Sebastian, Ruppel, Antonia, Seroussi, Helene, Smith, Emma C., Steinhage, Daniel, Sun, Bo, Van den Broeke, Michiel R., Van Ommen, Tas D., Van Wessem, Melchior, Young, Duncan. (2019) Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet. Nature Geoscience, 13 (). pp. 10.1038/s41561-019-0510-8

Bowler, Ellen, Fretwell, Peter T. , French, Geoffrey, Mackiewicz, Michal. (2019) Using deep learning to count albatrosses from space. In: Foscari, Giulia (eds.). IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, , IEEE, pp. 10.1109/IGARSS.2019.8898079

Fretwell, Peter T. , Jackson, Jennifer A. , Ulloa Encina, Mauricio J., Häussermann, Vreni, Perez Alvarez, Maria J., Olavarría, Carlos, Gutstein, Carolina S.. (2019) Using remote sensing to detect whale strandings in remote areas: the case of sei whales mass mortality in Chilean Patagonia. PLoS ONE, 14 (). pp. 10.1371/journal.pone.0222498

Jawak, Shridhar D., Luis, Alvarinho J., Fretwell, Peter , Convey, Peter , Durairajan, Udhayaraj A.. (2019) Semiautomated detection and mapping of vegetation distribution in the Antarctic environment using spatial-spectral characteristics of WorldView-2 imagery.. Remote Sensing, 11 (). pp. 10.3390/rs11161909

Gray, D.M., Burton-Johnson, A. , Fretwell, P.T. . (2019) Evidence for a lava lake on Mt. Michael volcano, Saunders Island (South Sandwich Islands) from Landsat, Sentinel-2 and ASTER satellite imagery. Journal of Volcanology and Geothermal Research, 379 (). pp. 10.1016/j.jvolgeores.2019.05.002

Fretwell, Peter T. , Trathan, Phil N. . (2019) Emperors on thin ice: three years of breeding failure at Halley Bay. Antarctic Science, 31 (). pp. 10.1017/S0954102019000099

Cubaynes, Hannah , Fretwell, Peter , Bamford, Connor , Gerrish, Laura , Jackson, Jennifer . (2019) Whales from space: Four mysticete species described using new VHR satellite imagery. Marine Mammal Science, 35 (). pp. 10.1111/mms.12544

Belcher, Anna , Henson, Stephanie , Manno, Clara , Hill, Simeon , Atkinson, A, Thorpe, Sally , Fretwell, Peter , Ireland, Louise , Tarling, Geraint . (2019) Krill faecal pellets drive hidden pulses of particulate organic carbon in the marginal ice zone. Nature Communications, 10 (). pp. 10.1038/s41467-019-08847-1

Hodgson, Dominic , Jordan, Tom , De Rydt, Jan, Fretwell, Peter , Seddon, Samuel, Becker, David, Hogan, Kelly , Smith, Andy , Vaughan, David . (2019) Past and future dynamics of the Brunt Ice Shelf from seabed bathymetry and ice shelf geometry. The Cryosphere, 13 (). pp. 10.5194/tc-13-545-2019

2018

Weimerskirch, Henri, Delord, Karine, Barbraud, Christophe, Le Bouard, Fabrice, Ryan, Peter G., Fretwell, Peter , Marteau, Cédric. (2018) Status and trends of albatrosses in the French Southern Territories, Western Indian Ocean. Polar Biology, 41 (). pp. 10.1007/s00300-018-2335-0

Hodgson, Dominic A. , Hogan, Kelly , Smith, James M., Smith, James A. , Hillenbrand, Claus-Dieter , Graham, Alistair G.C., Fretwell, Peter , Allen, Claire , Peck, Vicky , Arndt, Jan-Erik, Dorschel, Boris, Hübscher, Christian, Smith, Andy M. , Larter, Robert . (2018) Deglaciation and future stability of the Coats Land ice margin, Antarctica. The Cryosphere, 12 (). pp. 10.5194/tc-12-2383-2018

Lennert-Cody, Cleridy E, Buckland, Stephen T, Gerrodette, Tim, Webb, Andrew, Barlow, Jay, Fretwell, Peter , Maunder, Mark N, Kitakado, Toshihide, Moore, Jeffrey E, Scott, Michael D, Skaug, Hans J. (2018) Review of potential line-transect methodologies for estimating abundance of dolphin stocks in the eastern tropical Pacific. Journal of Cetacean Research and Management, 19 (). pp.

2017

Rees, W.G., Brown, J.A., Fretwell, P.T. , Trathan, P.N. . (2017) What colour is penguin guano?. Antarctic Science, 29 (). pp. 10.1017/S0954102017000190

Baker, G. Barry, Jensz, Katrina, Bell, Mike, Fretwell, Peter T. , Phillips, Richard A.. Foscari, Giulia (eds.). (2017) Seabird population research, Chatham Islands. 2016/17 aerial photographic survey. , Latitude 42 Environmental Consultants Pty Ltd, 23 pp. (.)

Fretwell, Peter T. , Scofield, Paul, Phillips, Richard A.. (2017) Using super-high resolution satellite imagery to census threatened albatrosses. Ibis, 159 (). pp. 10.1111/ibi.12482

Roberts, Stephen J. , Monien, Patrick, Foster, Louise C., Loftfield, Julia, Hocking, Emma P., Schnetger, Bernhard, Pearson, Emma J., Juggins, Steve, Fretwell, Peter , Ireland, Louise , Ochyra, Ryszard, Haworth, Anna R., Allen, Claire S. , Moreton, Steven G., Davies, Sarah J., Brumsack, Hans-Jürgen, Bentley, Michael J., Hodgson, Dominic A. . (2017) Past penguin colony responses to explosive volcanism on the Antarctic Peninsula. Nature Communications, 8 (). 16 pp. doi:10.1038/ncomms14914

Atkinson, Angus, Hill, Simeon L. , Pakhomov, Evgeny A., Siegel, Volker, Anadon, Ricardo, Chiba, Sanae, Daly, Kendra L., Downie, Rod, Fielding, Sophie , Fretwell, Peter , Gerrish, Laura , Hosie, Graham W., Jessopp, Mark J., Kawaguchi, So, Krafft, Bjørn A., Loeb, Valerie, Nishikawa, Jun, Peat, Helen J. , Reiss, Christian S., Ross, Robin M., Quetin, Langdon B., Schmidt, Katrin, Steinberg, Deborah K., Subramaniam, Roshni C., Tarling, Geraint A. , Ward, Peter. (2017) KRILLBASE: a circumpolar database of Antarctic krill and salp numerical densities, 1926–2016. Earth System Science Data, 9 (). pp. doi:10.5194/essd-9-193-2017

Ancel, André, Cristofari, Robin, Trathan, Phil N. , Gilbert, Caroline, Fretwell, Peter T. , Beaulieu, Michaël. (2017) Looking for new emperor penguin colonies? Filling the gaps. Global Ecology and Conservation, 9 (). pp. doi:10.1016/j.gecco.2017.01.003

2016

Burton-Johnson, Alex , Black, Martin , Fretwell, Peter , Kaluza-Gilbert, Joseph. (2016) An automated methodology for differentiating rock from snow, clouds and sea in Antarctica from Landsat 8 imagery: A new rock outcrop map and area estimation for the entire Antarctic continent. The Cryosphere, 10 (). pp. 10.5194/tc-10-1665-2016

Leat, Philip T., Fretwell, Peter T. , Tate, Alex J. , Larter, Robert D. , Martin, Tara J., Smellie, John L., Jokat, Wilfred, Bohrmann, Gerhard. (2016) Bathymetry and geological setting of the South Sandwich Islands volcanic arc. Antarctic Science, 28 (). pp. 10.1017/S0954102016000043

Black, Martin , Riley, Teal R. , Ferrier, Graham, Fleming, Andrew H. , Fretwell, Peter T. . (2016) Automated lithological mapping using airborne hyperspectral thermal infrared data: A case study from Anchorage Island, Antarctica. Remote Sensing of Environment, 176 (). pp. 10.1016/j.rse.2016.01.022

Xavier, Jose C. , Peck, Lloyd S. , Fretwell, Peter , Turner, John . (2016) Climate change and polar range expansions: Could cuttlefish cross the Arctic?. Marine Biology, 163 (). pp. doi:10.1007/s00227-016-2850-x

Newsham, Kevin K. , Hopkins, David W., Carvalhais, Lilia C., Fretwell, Peter T. , Rushton, Steven P., O'Donnell, Anthony G., Dennis, Paul G.. (2016) Relationship between soil fungal diversity and temperature in the maritime Antarctic. Nature Climate Change, 6 (). pp. 10.1038/nclimate2806

Fretwell, Peter Thomas . (2016) Discovering and monitoring Antarctic wildlife populations by remote sensing. Open University, PhD thesis

2015

Casanovas, Paula, Black, Martin , Fretwell, Peter , Convey, Peter . (2015) Mapping lichen distribution on the Antarctic Peninsula using remote sensing, lichen spectra and photographic documentation by citizen scientists. Polar Research, 34 (). 8 pp. 10.3402/polar.v34.25633

Fretwell, Peter . (2015) Cryosphere: Entry beneath ice. Nature Geoscience, 8 (). pp. doi:10.1038/ngeo2396

LaRue, Michelle A., Kooyman, Gerald, Lynch, Heather J., Fretwell, Peter . (2015) Emigration in emperor penguins: implications for interpretation of long-term studies. Ecography, 38 (). pp. doi:10.1111/ecog.00990

Fretwell, P.T. , Phillips, R.A., Brooke, M. de L., Fleming, A.H. , McArthur, A.. (2015) Using the unique spectral signature of guano to identify unknown seabird colonies. Remote Sensing of the Environment, 156 (). pp. 10.1016/j.rse.2014.10.011

2014

Waluda, Claire M. , Dunn, Michael J. , Curtis, Michael L., Fretwell, Peter T. . (2014) Assessing penguin colony size and distribution using digital mapping and satellite remote sensing. Polar Biology, 37 (). 7 pp. doi:10.1007/s00300-014-1566-y

Ancel, André, Cristofari, Robin, Fretwell, Peter T. , Trathan, Phil N. , Wienecke, Barbara, Boureau, Matthieu, Morinay, Jennifer, Blanc, Stéphane, Le Maho, Yvon, Le Bohec, Céline. (2014) Emperors in hiding: When ice-breakers and satellites complement each other in Antarctic exploration. PLoS ONE, 9 (). 8 pp. doi:10.1371/journal.pone.0100404

Black, Martin , Fleming, Andrew , Riley, Teal , Ferrier, Graham, Fretwell, Peter , McFee, John, Achal, Stephen, Diaz, Alejandra Umana. (2014) On the Atmospheric Correction of Antarctic Airborne Hyperspectral Data. Remote Sensing, 6 (). pp. doi:10.3390/rs6054498

Fretwell, Peter T. , Staniland, Iain J. , Forcada, Jaume . (2014) Whales from space: counting southern right whales by satellite. PLoS One, 9 (). pp. 10.1371/journal.pone.0088655

Fretwell, Peter T. , Trathan, Phil N. , Wienecke, Barbara, Kooyman, Gerald L.. (2014) Emperor penguins breeding on iceshelves. PLoS ONE, 9 (). pp. doi:10.1371/journal.pone.0085285

Leat, Philip T., Fretwell, Peter T. , Tate, Alex J. , Larter, Robert D. , Martin, T.J., Smellie, J.K., Jokat, W., Bohrmann, G.. (2014) Bathymetry and geological setting of the South Sandwich Islands Volcanic Arc. BAS GEOMAP 2, . Cambridge, British Antarctic Survey.

2013

Rose, Kathryn C., Ferraccioli, Fausto , Jamieson, Stewart S.R., Bell, Robin E., Corr, Hugh, Creyts, Timothy T., Braaten, David, Jordan, Tom A. , Fretwell, Peter T. , Damaske, Detlef. (2013) Early East Antarctic Ice Sheet growth recorded in the landscape of the Gamburtsev Subglacial Mountains. Earth & Planetary Science Letters, 375 (). pp. 10.1016/j.epsl.2013.03.053

Grant, S.M. , Hill, S.L. , Fretwell, P.T. . (2013) Spatial distribution of management measures, Antarctic krill catch and Southern Ocean bioregions: implications for conservation planning. CCAMLR Science, 20 (). pp.

Fretwell, Peter . (2013) BEDMAP2: Bedrock topography of Antarctica. BAS Thematic map series, . Cambridge, UK, British Antarctic Survey.

Fretwell, P. , Pritchard, H.D. , Vaughan, D.G. , Bamber, J.L., Barrand, N.E., Bell, R., Bianchi, C., Bingham, R. G., Blankenship, D.D., Casassa, G., Catania, G., Callens, D., Conway, H., Cook, A.J., Corr, H.F.J., Damaske, D., Damm, V., Ferraccioli, F. , Forsberg, R., Fujita, S., Gim, Y., Gogineni, P., Griggs, J.A., Hindmarsh, R.C.A. , Holmlund, P., Holt, J.W., Jacobel, R.W., Jenkins, A. , Jokat, W., Jordan, T. , King, E.C. , Kohler, J., Krabill, W., Riger-Kusk, M., Langley, K.A., Leitchenkov, G., Leuschen, C., Luyendyk, B.P., Matsuoka, K., Mouginot, J., Nitsche, F.O., Nogi, Y., Nost, O.A., Popov, S.V., Rignot, E., Rippin, D.M., Rivera, A., Roberts, J., Ross, N., Siegert, M.J., Smith, A.M. , Steinhage, D., Studinger, M., Sun, B., Tinto, B.K., Welch, B.C., Wilson, D., Young, D.A., Xiangbin, C., Zirizzotti, A.. (2013) Bedmap2: improved ice bed, surface and thickness datasets for Antarctica. The Cryosphere, 7 (). pp. doi:10.5194/tc-7-375-2013

Murphy, E.J. , Hofmann, E.E., Watkins, J.L., Johnston, N.M. , Piñones, A., Ballerini, T., Hill, S.L. , Trathan, P.N. , Tarling, G.A. , Cavanagh, R.A. , Young, E.F. , Thorpe, S.E. , Fretwell, P. . (2013) Comparison of the structure and function of Southern Ocean regional ecosystems: The Antarctic Peninsula and South Georgia. Journal of Marine Systems, 109-110 (). pp. doi:10.1016/j.jmarsys.2012.03.011

2012

Fretwell, Peter . (2012) The Emperor strikes back. Significance, 9 (). pp. 10.1111/j.1740-9713.2012.00567.x

Fretwell, Peter T. , LaRue, Michelle A., Morin, Paul, Kooyman, Gerald L., Wienecke, Barbara, Ratcliffe, Norman , Fox, Adrian J. , Fleming, Andrew H. , Porter, Claire, Trathan, Phil N. . (2012) An Emperor Penguin population estimate: The first global, synoptic survey of a species from space. Plos One, 7 (). 11 pp. 10.1371/journal.pone.0033751

Hodgson, Dominic A. , Bentley, Michael J., Schnabel, Christoph, Cziferszky, Andreas , Fretwell, Peter , Convey, Peter , Xu, Sheng. (2012) Glacial geomorphology and cosmogenic 10Be and 26Al exposure ages in the northern Dufek Massif, Weddell Sea embayment, Antarctica. Antarctic Science, 24 (). pp. 10.1017/S0954102012000016

Hoffman, Joseph I., Clarke, Andy , Clark, Melody S. , Fretwell, Peter , Peck, Lloyd S. . (2012) Unexpected Fine-Scale Population Structure in a Broadcast-Spawning Antarctic Marine Mollusc. Plos One, 7 (). 7 pp. 10.1371/journal.pone.0032415

Smith, D.E., Hunt, N., Firth, C.R., Jordan, J.T., Fretwell, P.T. , Harman, M., Murdy, J., Orford, J.D., Burnside, N.G.. (2012) Patterns of Holocene relative sea level change in the North of Britain and Ireland. Quaternary Science Reviews, 54 (). pp. doi:10.1016/j.quascirev.2012.02.007

2011

Barnes, D.K.A. , Collins, M.A. , Brickle, P., Fretwell, P. , Griffiths, H.J. , Herbert, D., Hogg, O.T., Sands, C.J. . (2011) The need to implement the Convention on Biological Diversity at the high latitude site, South Georgia. Antarctic Science, 23 (). pp. 10.1017/S0954102011000253

Fretwell, Peter T. , Convey, Peter , Fleming, Andrew H. , Peat, Helen J. , Hughes, Kevin A. . (2011) Detecting and mapping vegetation distribution on the Antarctic Peninsula from remote sensing data. Polar Biology, 34 (). pp. 10.1007/s00300-010-0880-2

Hughes, Kevin A. , Fretwell, Peter , Rae, Joanna, Holmes, Keith, Fleming, Andrew . (2011) Untouched Antarctica: mapping a finite and diminishing environmental resource. Antarctic Science, 23 (). pp. 10.1017/S095410201100037X

Trathan, Philip N. , Fretwell, Peter T. , Stonehouse, Bernard. (2011) First recorded loss of an emperor penguin colony in the recent period of Antarctic regional warming: implications for other colonies. PLoS One, 6 (). 11 pp. 10.1371/journal.pone.0014738

Vaughan, David G. , Barnes, David K.A. , Fretwell, Peter T. , Bingham, Robert G.. (2011) Potential seaways across West Antarctica. Geochemistry, Geophysics, Geosystems, 12 (). 11 pp. 10.1029/2011GC003688

Watcham, E.P., Bentley, M.J., Hodgson, D.A. , Roberts, Stephen , Fretwell, P.T. , Lloyd, J.M., Larter, R.D. , Whitehouse, P.L., Leng, M.J. , Monien, P., Moreton, S.G.. (2011) A new Holocene relative sea level curve for the South Shetland Islands, Antarctica. Quaternary Science Reviews, 30 (). pp. 10.1016/j.quascirev.2011.07.021

2010

Fretwell, Peter Thomas , Hodgson, Dominic , Watcham, Emma, Bentley, Michael, Roberts, Stephen . (2010) Holocene isostatic uplift of the South Shetland Islands, Antarctic Peninsula, modelled from raised beaches. Quaternary Science Reviews, 29 (). pp. 10.1016/j.quascirev.2010.04.006

Tarling, Geraint A. , Ensor, Natalie S., Fregin, Torsten, Goodall-Copestake, Will P. , Fretwell, Peter . (2010) An introduction to the biology of Northern krill (Meganyctiphanes norvegica Sars). In: Tarling, Geraint A. (eds.). The biology of Northern krill, London, Academic Press, pp. (Advances in Marine Biology, ).

2009

Belchier, M., Fretwell, P.T. . (2009) Revised estimates of the area of the South Georgia and Shag Rocks shelf (CCAMLR Subarea 48.3). CCAMLR Science, 16 (). pp.

Fretwell, P.T. , Tate, Alex , Deen, Tara, Belchier, Mark. (2009) Compilation of a new bathymetric dataset of South Georgia. Antarctic Science, 21 (). pp. doi:10.1017/S0954102008001703

Fretwell, Peter T. , Trathan, Philip N. . (2009) Penguins from space: faecal stains reveal the location of emperor penguin colonies. Global Ecology and Biogeography, 18 (). pp. 10.1111/j.1466-8238.2009.00467.x

Haselwimmer, Christian, Fretwell, Peter . (2009) Field reflectance spectroscopy of sparse vegetation cover on the Antarctic peninsula. In: Tarling, Geraint A. (eds.). 1st IEEE GRSS Workshop on hyperspectral image and signal processing - Evolution in remote sensing, Grenoble, France, 26-29 August 2009: WHISPERS'09, New York, Institute of Electrical and Electronics Engineers, pp.

Martin, A.R., Poncet, S., Barbraud, C., Foster, E., Fretwell, P.T. , Rothery, P.. (2009) The white-chinned petrel (Procellaria aequinoctialis) on South Georgia: population size, distribution and global significance. Polar Biology, 32 (). pp. 10.1007/s00300-008-0570-5

2008

Graham, Alastair G.C., Fretwell, Peter T. , Larter, Robert D. , Hodgson, Dominic A. , Wilson, Christian K., Tate, Alexander James , Morris, Peter. (2008) A new bathymetric compilation highlighting extensive paleo-ice sheet drainage on the continental shelf, South Georgia, sub-Antarctica. Geochemistry Geophysics Geosystems, 9 (). 21 pp. 10.1029/2008GC001993

Atkinson, A., Siegel, V., Pakhomov, E.A., Rothery, P., Loeb, V., Ross, R.M., Quetin, L.B., Schmidt, K., Fretwell, P. , Murphy, E.J. , Tarling, G.A. , Fleming, A.H. . (2008) Oceanic circumpolar habitats of Antarctic krill. Marine Ecology Progress Series, 362 (). pp. doi:10.3354/meps07498

Fretwell, Peter , Smith, D.E., Harrison, S.. (2008) The Last Glacial Maximum British-Irish ice sheet: a reconstruction using digital terrain mapping. Journal of Quaternary Science, 23 (). pp. 10.1002/jqs.1143

2007

Downie, Roderick H., Fretwell, Peter T. . (2007) Antarctic Peninsula. In: Riffenburgh, B. (eds.). Encyclopedia of the Antarctic, New York, Routledge, pp.

Smith, D.E., Cullingford, R.A., Mighall, T.M., Jordan, J.T., Fretwell, P.T. . (2007) Holocene relative sea level changes in a glacio-isostatic area: new data from south-west Scotland, United Kingdom. Marine Geology, 242 (). pp. 10.1016/j.margeo.2006.09.015

2006

Smellie, J.L., McIntosh, W.C., Esser, R., Fretwell, P.T. . (2006) The Cape Purvis volcano, Dundee Island (northern Antarctic Peninsula): late Pleistocene age, eruptive processes and implications for a glacial palaeoenvironment. Antarctic Science, 18 (). pp. doi:10.1017/S0954102006000447

Smith, David E., Fretwell, Peter T. , Cullingford, Robin A., Firth, Callum R.. (2006) Towards improved empirical isobase models of Holocene land uplift for mainland Scotland, UK. Philosophical Transactions of the Royal Society of London, Series A, 364 (). pp. doi:10.1098/rsta.2006.1748

2003

Cooper, A. Paul R., Fretwell, Peter . (2003) A placename geography for Antarctica. Bulletin of the Society of Cartographers, 37 (). pp.

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