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Your search keyword '"Greenwood, Sarah L."' showing total 34 results
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34 results on '"Greenwood, Sarah L."'

1. List of contributors

Author

Akçar, Naki, primary, Allaart, Lis, additional, Allard, James, additional, Andrés, Nuria, additional, Ardelean, Florina, additional, Ardelean, Mircea, additional, Ásbjörnsdóttir, Lovísa, additional, Bell, Benjamin A., additional, Benediktsson, Ívar Örn, additional, Berzescu, Oana, additional, Bitinas, Albertas, additional, Blard, Pierre-Henri, additional, Börner, Andreas, additional, Braithwaite, Roger J., additional, Brynjólfsson, Skafti, additional, Bushueva, Irina S., additional, Błaszkiewicz, Mirosław, additional, Calvet, Marc, additional, Cartapanis, Olivier, additional, Chapron, Emmanuel, additional, Charton, Joanna, additional, Clark, Chris D., additional, Colucci, Renato R., additional, Cornelissen, Henk L., additional, Delmas, Magali, additional, Farnsworth, Wesley R., additional, Fernandes, Marcelo, additional, Fernández-Fernández, José M., additional, Fink, David, additional, Fletcher, William J., additional, Gauld, Jessica, additional, Gibbard, Philip L., additional, Giraudi, Carlo, additional, Glasser, Neil F., additional, Glazovsky, Andrey F., additional, Greenwood, Sarah L., additional, Gunnell, Yanni, additional, Guobyte, Rimante, additional, Gdek, Bogdan, additional, Hughes, Anna L.C., additional, Hughes, Philip D., additional, Ivy-Ochs, Susan, additional, Jomelli, Vincent, additional, Kłapyta, Piotr, additional, Le Roy, Melaine, additional, Mangerud, Jan, additional, Marks, Leszek, additional, Matthews, John A., additional, Monegato, Giovanni, additional, Naughton, Filipa, additional, Nesje, Atle, additional, Nicolussi, Kurt, additional, Oliva, Marc, additional, Onaca, Alexandru, additional, Palacios, David, additional, Pope, Richard, additional, Regnéll, Carl, additional, Reitner, Jürgen M., additional, Reixach, Théo, additional, René, Pierre, additional, Rhoujjati, Ali, additional, Ribolini, Adriano, additional, Rinterknecht, Vincent, additional, Sánchez Goñi, Maria Fernanda, additional, Schimmelpfennig, Irene, additional, Seppä, Heikki, additional, Solomina, Olga, additional, Spagnolo, Matteo, additional, Stoffel, Markus, additional, Tanarro, Luis M., additional, Tomkins, Matt D., additional, Tylmann, Karol, additional, Urdea, Petru, additional, Woodward, Jamie, additional, and Zasadni, Jerzy, additional

Published
2024
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4. List of contributors

Author

Akçar, Naki, primary, Allaart, Lis, additional, Allard, James L., additional, Andrés, Nuria, additional, Ardelean, Florina, additional, Ardelean, Mircea, additional, Ásbjörnsdóttir, Lovísa, additional, Avery, Rachael S., additional, Benediktsson, Ívar Örn, additional, Berzescu, Oana, additional, Bitinas, Albertas, additional, Börner, Andreas, additional, Brynjólfsson, Skafti, additional, Błaszkiewicz, Mirosław, additional, Calvet, Marc, additional, Clark, Chris D., additional, Delmas, Magali, additional, Esteves, Mariana, additional, Fernandes, Marcelo, additional, Fernández-Fernández, José M., additional, García-Ruiz, José M., additional, Gibbard, Philip L., additional, Giraudi, Carlo, additional, Glasser, Neil F., additional, Greenwood, Sarah L., additional, Gunnell, Yanni, additional, Guobyte, Rimante, additional, Hjelstuen, Berit Oline, additional, Hughes, Anna L.C., additional, Hughes, Philip D., additional, Ivy-Ochs, Susan, additional, Johnson, Mark D., additional, Korsakova, Olga, additional, Kłapyta, Piotr, additional, Landais, Amaelle, additional, Lunkka, Juha Pekka, additional, Makos, Michał, additional, Mangerud, Jan, additional, Marks, Leszek, additional, Monegato, Giovanni, additional, Naughton, Filipa, additional, Nazarov, Dmitry, additional, Nosova, Olga, additional, Oliva, Marc, additional, Onaca, Alexandru, additional, Palacios, David, additional, Patton, Henry, additional, Pope, Richard J.J., additional, Regnéll, Carl, additional, Reitner, Jürgen M., additional, Reixach, Théo, additional, Ribolini, Adriano, additional, Rinterknecht, Vincent, additional, Riveiros, Natalia Vazquez, additional, Rodrigues, Teresa, additional, Sánchez-Goñi, María F., additional, Sejrup, Hans Petter, additional, Spagnolo, Matteo, additional, Svendsen, John Inge, additional, Tomkins, Matt D., additional, Toucanne, Samuel, additional, Tołoczko-Pasek, Anna, additional, Tylmann, Karol, additional, Urdea, Petru, additional, Vashkov, Andrey, additional, Winsborrow, Monica C.M., additional, Woodward, Jamie C., additional, and Zasadni, Jerzy, additional

Published
2023
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10. List of contributors

Author

Akçar, Naki, primary, Alexandropoulou, Nikolitsa, additional, Allard, James L., additional, Andrés, Nuria, additional, Ardelean, Florina, additional, Ardelean, Mircea, additional, Ásbjörnsdóttir, Lovísa, additional, Benediktsson, Ívar Örn, additional, Bitinas, Albertas, additional, Börner, Andreas, additional, Brynjólfsson, Skafti, additional, Błaszkiewicz, Mirosław, additional, Calvet, Marc, additional, Clark, Chris D., additional, Delmas, Magali, additional, Esteves, Mariana, additional, Fernández-Fernández, José M., additional, García-Ruiz, José M., additional, Gibbard, Philip L., additional, Giraudi, Carlo, additional, Glasser, Neil F., additional, Greenwood, Sarah L., additional, Gunnell, Yanni, additional, Guobyte, Rimante, additional, Hjelstuen, Berit Oline, additional, Hughes, Anna L.C., additional, Hughes, Philip D., additional, Ivy-Ochs, Susan, additional, Kałuża, Piotr, additional, Korsakova, Olga, additional, Kłapyta, Piotr, additional, Landais, Amaelle, additional, Makos, Michał, additional, Mangerud, Jan, additional, Marks, Leszek, additional, Monegato, Giovanni, additional, Naughton, Filipa, additional, Nazarov, Dmitry, additional, Nosova, Olga, additional, Oliva, Marc, additional, Onaca, Alexandru, additional, Palacios, David, additional, Patton, Henry, additional, Regnéll, Carl, additional, Reitner, Jürgen M., additional, Reixach, Théo, additional, Ribolini, Adriano, additional, Rinterknecht, Vincent, additional, Rodrigues, Teresa, additional, Sánchez Goñi, María Fernanda, additional, Sejrup, Hans Petter, additional, Spagnolo, Matteo, additional, Svendsen, John Inge, additional, Tomkins, Matt D., additional, Toucanne, Samuel, additional, Tylmann, Karol, additional, Urdea, Petru, additional, Vashkov, Andrey, additional, Vázquez-Riveiros, Natalia, additional, Winsborrow, Monica C.M., additional, Woodward, Jamie C., additional, and Zasadni, Jerzy, additional

Published
2022
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17. Footprint of the Baltic Ice Stream : geomorphic evidence for shifting ice stream pathways

Author

Greenwood, Sarah L., Avery, Rachael S., Gyllencreutz, Richard, Regnéll, Carl, Tylmann, Karol, Greenwood, Sarah L., Avery, Rachael S., Gyllencreutz, Richard, Regnéll, Carl, and Tylmann, Karol

Abstract

The Baltic Ice Stream, a large fast-flowing sector of the last Fennoscandian Ice Sheet that occupied the present-day Baltic Sea basin, was first conceptualized in the earliest days of glacial geological research in Scandinavia. Landform and sedimentological evidence from the terrestrial margins support the concept and numerical ice-sheet models demonstrate its existence and possible evolution. However, with evidence for the Baltic Ice Stream thus far limited to the terrestrial periphery, its true form, scale, function, and role in deglaciation have proven enigmatic. Here we present geomorphological evidence directly from the Baltic seabed that confirms the existence of and sheds light on the behaviour of the Baltic Ice Stream. Based on an extensive collection of high-, moderate- and low-resolution bathymetric terrain models covering a large proportion of the Baltic Sea floor, and complemented by LiDAR-data for the Baltic islands, we have identified and mapped >20 000 individual subglacial bedforms, meltwater landforms and grounding line landforms. We reconstruct a six-stage sequence of ice flow and retreat, finding that streaming was persistent in the Baltic but that pathways were variable in extent, timing and duration: different sectors of the Baltic exhibit asynchronous streaming and out-of-phase grounding line changes. During deglaciation, grounding line readvances occurred in both the southwestern and the northern Baltic Proper, and, while abundant iceberg ploughmarks attest to calving as a significant ice loss mechanism, lobate margins suggest supply to the Baltic catchment was consistently high. Our reconstruction is limited by a fragmentary geomorphic record. Here we put forward a first hypothesis for how the Baltic Ice Stream evolved, and hope it stimulates new geomorphic, stratigraphical and core data collection to extend the landform record, provide insights into subglacial and grounding line processes, and constrain the chronology for Baltic Ice Strea

Published
2024
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22. The Lund Moraine - the geomorphic limit of the last Young Baltic ice advance in the Öresund region

Author

Regnéll, Carl, Alexanderson, Helena, Greenwood, Sarah L., Gyllencreutz, Richard, Öhrling, Christian, Regnéll, Carl, Alexanderson, Helena, Greenwood, Sarah L., Gyllencreutz, Richard, and Öhrling, Christian

Abstract

Here we present geomorphological evidence of a previously unrecognised ∼50 km long, ice-marginal moraine complex in southwestern Skåne, southernmost Sweden, which we name the “Lund Moraine”. This lobate moraine marks a sharp boundary between heavily streamlined and gently undulating landscapes, and closely outlines the extent of the “Lund till/diamicton”. We interpret that the moraine was formed by a northward readvance, corresponding to a last Young Baltic readvance of the Scandinavian Ice Sheet into Öresund. Consequently, we infer that the “Lund till/diamicton” was formed subglacially, in contrast to earlier interpretations of it being a waterlain diamicton. Based on previously published dates, stratigraphically below “Lund till/diamicton”, we infer that this readvance occurred sometime after c. 16 cal. ka BP. This readvance could offer an explanation to the apparent discrepancy of observations of the postglacial marine limit from outside and inside the Lund Moraine. Our observations will hopefully settle the ∼50 years long controversy concerning the extent or even existence of such a readvance into Öresund. We expect that our findings will guide further work towards disentangling the complex deglacial history of Skåne and the wider Öresund region.

Published
2023
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28. Advances in understanding subglacial meltwater drainage from past ice sheets

Author

Simkins, Lauren M., Greenwood, Sarah L., Winsborrow, Monica C. M., Bjarnadóttir, Lilja R., Lepp, Allison P., Simkins, Lauren M., Greenwood, Sarah L., Winsborrow, Monica C. M., Bjarnadóttir, Lilja R., and Lepp, Allison P.

Abstract

Meltwater drainage beneath ice sheets is a fundamental consideration for understanding ice–bed conditions and bed-modulated ice flow, with potential impacts on terminus behavior and ice-shelf mass balance. While contemporary observations reveal the presence of basal water movement in the subglacial environment and inferred styles of drainage, the geological record of former ice sheets, including sediments and landforms on land and the seafloor, aids in understanding the spatiotemporal evolution of efficient and inefficient drainage systems and their impact on ice-sheet behavior. We highlight the past decade of advances in geological studies that focus on providing process-based information on subglacial hydrology of ice sheets, how these studies inform theory, numerical models and contemporary observations, and address the needs for future research.

Published
2022
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