RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry
In 2012, multiple lines of evidence suggest a record release of freshwater from the Greenland ice sheet (GrIS), the largest expanse of glacial ice in the Northern Hemisphere and a major source of meltwater and associated material to the surrounding North Atlantic and Arctic Oceans. Between July 8 an...
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2014
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dataone:doi:10.18739/A2XG0C 2024-06-03T18:46:42+00:00 RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry Matthew Charette NORTH AMERICA > GREENLAND ENVELOPE(-50.16,-50.16,67.06,67.06) BEGINDATE: 2012-09-01T00:00:00Z ENDDATE: 2014-06-30T00:00:00Z 2014-10-23T00:00:00Z https://doi.org/10.18739/A2XG0C unknown Arctic Data Center EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > ISOTOPES EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS MANNED FIELD STATION environment Dataset 2014 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2XG0C 2024-06-03T18:10:26Z In 2012, multiple lines of evidence suggest a record release of freshwater from the Greenland ice sheet (GrIS), the largest expanse of glacial ice in the Northern Hemisphere and a major source of meltwater and associated material to the surrounding North Atlantic and Arctic Oceans. Between July 8 and 12, satellite-derived estimates of surface melt increased from 40% to 97% of the ice sheet. This warming received widespread media attention and public interest, yet the scientific community lacks direct observations of meltwater controls on ice sheet movement and meltwater geochemistry for such a large-scale melting event. The overarching goal of this RAPID proposal is to quantify, in short order, the impact of a large-scale melting event on the ice sheet dynamics and meltwater biogeochemistry of a large, land-terminating glacier on the western Greenland margin. RAPID funds will enable the analysis and synthesis of a unique sample set collected during other fieldwork from the Leverett Glacier catchment, a large outlet glacier that discharges through a single proglacial river. Though the focus is on the 2012 episode, the investigators will also analyze samples and GrIS dynamics data from two field seasons (2011- 12), which will aid in interpretation of changes driven by the historic melting event owing to the highly contrasting annual freshwater discharge rates. The investigators will use time-series radiogenic (beryllium-7 and radon-222) and stable isotopes (oxygen and hydrogen), each with unique sources and constant production rates, from the Leverett glacier watershed to differentiate the fractions of meltwater sourced from recent surface snow, glacial ice and delayed flow meltwater. They will also investigate the composition and magnitude of nutrient and metal fluxes released from the subglacial environment and study how these fluxes evolved during July 2012. From 2011-12, parallel ice sheet geophysical data (GPS, satellite imagery) and meltwater biogeochemistry samples (carbon, macro- and micro-nutrients) have been collected by the PI and colleagues from universities in the United Kingdom. The proposed project will fully fund a Ph.D. student, and high school students and undergraduate interns will be recruited to assist with the laboratory aspect of the research. In order to increase the visibility of this project among the general public, the PI and student will co-author an article for the WHOI magazine Oceanus. This publication reaches a wide audience through both print- and web-based editions. Finally, the Ph.D. student will continue to report on the results of this study via an Expedition Blog called "Following the Ice" on Scientific American (http://blogs.scientificamerican.com/expeditions/tag/following-the-ice/). Dataset Arctic glacier Greenland Ice Sheet Leverett Glacier North Atlantic RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry Arctic Data Center (via DataONE) Arctic Greenland Leverett Glacier ENVELOPE(-147.583,-147.583,-85.633,-85.633) ENVELOPE(-50.16,-50.16,67.06,67.06) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > ISOTOPES EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS MANNED FIELD STATION environment |
spellingShingle |
EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > ISOTOPES EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS MANNED FIELD STATION environment Matthew Charette RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
topic_facet |
EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > ISOTOPES EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIERS MANNED FIELD STATION environment |
description |
In 2012, multiple lines of evidence suggest a record release of freshwater from the Greenland ice sheet (GrIS), the largest expanse of glacial ice in the Northern Hemisphere and a major source of meltwater and associated material to the surrounding North Atlantic and Arctic Oceans. Between July 8 and 12, satellite-derived estimates of surface melt increased from 40% to 97% of the ice sheet. This warming received widespread media attention and public interest, yet the scientific community lacks direct observations of meltwater controls on ice sheet movement and meltwater geochemistry for such a large-scale melting event. The overarching goal of this RAPID proposal is to quantify, in short order, the impact of a large-scale melting event on the ice sheet dynamics and meltwater biogeochemistry of a large, land-terminating glacier on the western Greenland margin. RAPID funds will enable the analysis and synthesis of a unique sample set collected during other fieldwork from the Leverett Glacier catchment, a large outlet glacier that discharges through a single proglacial river. Though the focus is on the 2012 episode, the investigators will also analyze samples and GrIS dynamics data from two field seasons (2011- 12), which will aid in interpretation of changes driven by the historic melting event owing to the highly contrasting annual freshwater discharge rates. The investigators will use time-series radiogenic (beryllium-7 and radon-222) and stable isotopes (oxygen and hydrogen), each with unique sources and constant production rates, from the Leverett glacier watershed to differentiate the fractions of meltwater sourced from recent surface snow, glacial ice and delayed flow meltwater. They will also investigate the composition and magnitude of nutrient and metal fluxes released from the subglacial environment and study how these fluxes evolved during July 2012. From 2011-12, parallel ice sheet geophysical data (GPS, satellite imagery) and meltwater biogeochemistry samples (carbon, macro- and micro-nutrients) have been collected by the PI and colleagues from universities in the United Kingdom. The proposed project will fully fund a Ph.D. student, and high school students and undergraduate interns will be recruited to assist with the laboratory aspect of the research. In order to increase the visibility of this project among the general public, the PI and student will co-author an article for the WHOI magazine Oceanus. This publication reaches a wide audience through both print- and web-based editions. Finally, the Ph.D. student will continue to report on the results of this study via an Expedition Blog called "Following the Ice" on Scientific American (http://blogs.scientificamerican.com/expeditions/tag/following-the-ice/). |
format |
Dataset |
author |
Matthew Charette |
author_facet |
Matthew Charette |
author_sort |
Matthew Charette |
title |
RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
title_short |
RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
title_full |
RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
title_fullStr |
RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
title_full_unstemmed |
RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
title_sort |
rapid: impact of large scale greenland ice sheet melting on glacier hydrology and meltwater geochemistry |
publisher |
Arctic Data Center |
publishDate |
2014 |
url |
https://doi.org/10.18739/A2XG0C |
op_coverage |
NORTH AMERICA > GREENLAND ENVELOPE(-50.16,-50.16,67.06,67.06) BEGINDATE: 2012-09-01T00:00:00Z ENDDATE: 2014-06-30T00:00:00Z |
long_lat |
ENVELOPE(-147.583,-147.583,-85.633,-85.633) ENVELOPE(-50.16,-50.16,67.06,67.06) |
geographic |
Arctic Greenland Leverett Glacier |
geographic_facet |
Arctic Greenland Leverett Glacier |
genre |
Arctic glacier Greenland Ice Sheet Leverett Glacier North Atlantic RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
genre_facet |
Arctic glacier Greenland Ice Sheet Leverett Glacier North Atlantic RAPID: Impact of Large Scale Greenland Ice Sheet Melting on Glacier Hydrology and Meltwater Geochemistry |
op_doi |
https://doi.org/10.18739/A2XG0C |
_version_ |
1800870077424205824 |