Eintrag weiter verarbeiten
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales
Gespeichert in:
| Zeitschriftentitel: | The Cryosphere |
|---|---|
| Personen und Körperschaften: | , , |
| In: | The Cryosphere, 12, 2018, 7, S. 2211-2227 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Copernicus GmbH
|
| Schlagwörter: |
| author_facet |
Joughin, Ian Smith, Ben E. Howat, Ian Joughin, Ian Smith, Ben E. Howat, Ian |
|---|---|
| author |
Joughin, Ian Smith, Ben E. Howat, Ian |
| spellingShingle |
Joughin, Ian Smith, Ben E. Howat, Ian The Cryosphere Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales Earth-Surface Processes Water Science and Technology |
| author_sort |
joughin, ian |
| spelling |
Joughin, Ian Smith, Ben E. Howat, Ian 1994-0424 Copernicus GmbH Earth-Surface Processes Water Science and Technology http://dx.doi.org/10.5194/tc-12-2211-2018 <jats:p>Abstract. We describe several new ice velocity maps produced by the Greenland Ice Mapping Project (GIMP) using Landsat 8 and Copernicus Sentinel 1A/B data. We then focus on several sites where we analyse these data in conjunction with earlier data from this project, which extend back to the year 2000. At Jakobshavn Isbræ and Køge Bugt, we find good agreement when comparing results from different sensors. In a change from recent behaviour, Jakobshavn Isbræ began slowing substantially in 2017, with a midsummer peak that was even slower than some previous winter minima. Over the last decade, we identify two major slowdown events at Køge Bugt that coincide with short-term advances of the terminus. We also examined populations of glaciers in north-west and south-west Greenland to produce a record of speed-up since 2000. Collectively these glaciers continue to speed up, but there are regional differences in the timing of periods of peak speed-up. In addition, we computed trends in winter flow speed for much of the south-west margin of the ice sheet and find little in the way of statistically significant changes over the period covered by our data. Finally, although the consistency of the data is generally good over time and across sensors, our analysis indicates that substantial differences can arise in regions with high strain rates (e.g. shear margins) where sensor resolution can become a factor. For applications such as constraining model inversions, users should factor in the impact that the data's resolution has on their results. </jats:p> Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales The Cryosphere |
| doi_str_mv |
10.5194/tc-12-2211-2018 |
| facet_avail |
Online Free |
| finc_class_facet |
Geographie Technik Geologie und Paläontologie |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC90Yy0xMi0yMjExLTIwMTg |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC90Yy0xMi0yMjExLTIwMTg |
| institution |
DE-Brt1 DE-Zwi2 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 |
| imprint |
Copernicus GmbH, 2018 |
| imprint_str_mv |
Copernicus GmbH, 2018 |
| issn |
1994-0424 |
| issn_str_mv |
1994-0424 |
| language |
English |
| mega_collection |
Copernicus GmbH (CrossRef) |
| match_str |
joughin2018greenlandicemappingprojecticeflowvelocityvariationatsubmonthlytodecadaltimescales |
| publishDateSort |
2018 |
| publisher |
Copernicus GmbH |
| recordtype |
ai |
| record_format |
ai |
| series |
The Cryosphere |
| source_id |
49 |
| title |
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_unstemmed |
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_full |
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_fullStr |
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_full_unstemmed |
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_short |
Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_sort |
greenland ice mapping project: ice flow velocity variation at sub-monthly to decadal timescales |
| topic |
Earth-Surface Processes Water Science and Technology |
| url |
http://dx.doi.org/10.5194/tc-12-2211-2018 |
| publishDate |
2018 |
| physical |
2211-2227 |
| description |
<jats:p>Abstract. We describe several new ice velocity maps produced by the
Greenland Ice Mapping Project (GIMP) using Landsat 8 and Copernicus Sentinel
1A/B data. We then focus on several sites where we analyse these data in
conjunction with earlier data from this project, which extend back to the
year 2000. At Jakobshavn Isbræ and Køge Bugt, we find good agreement when
comparing results from different sensors. In a change from recent behaviour,
Jakobshavn Isbræ began slowing substantially in 2017, with a midsummer
peak that was even slower than some previous winter minima. Over the last
decade, we identify two major slowdown events at Køge Bugt that coincide
with short-term advances of the terminus. We also examined populations of
glaciers in north-west and south-west Greenland to produce a record of speed-up
since 2000. Collectively these glaciers continue to speed up, but there are
regional differences in the timing of periods of peak speed-up. In addition,
we computed trends in winter flow speed for much of the south-west margin of
the ice sheet and find little in the way of statistically significant changes
over the period covered by our data. Finally, although the consistency of the
data is generally good over time and across sensors, our analysis
indicates that substantial differences can arise in regions with high strain
rates (e.g. shear margins) where sensor resolution can become a factor. For
applications such as constraining model inversions, users should factor in
the impact that the data's resolution has on their results.
</jats:p> |
| container_issue |
7 |
| container_start_page |
2211 |
| container_title |
The Cryosphere |
| container_volume |
12 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792347847836827648 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T18:01:34.773Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=Greenland+Ice+Mapping+Project%3A+ice+flow+velocity+variation+at+sub-monthly+to+decadal+timescales&rft.date=2018-07-11&genre=article&issn=1994-0424&volume=12&issue=7&spage=2211&epage=2227&pages=2211-2227&jtitle=The+Cryosphere&atitle=Greenland+Ice+Mapping+Project%3A+ice+flow+velocity+variation+at+sub-monthly+to+decadal+timescales&aulast=Howat&aufirst=Ian&rft_id=info%3Adoi%2F10.5194%2Ftc-12-2211-2018&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792347847836827648 |
| author | Joughin, Ian, Smith, Ben E., Howat, Ian |
| author_facet | Joughin, Ian, Smith, Ben E., Howat, Ian, Joughin, Ian, Smith, Ben E., Howat, Ian |
| author_sort | joughin, ian |
| container_issue | 7 |
| container_start_page | 2211 |
| container_title | The Cryosphere |
| container_volume | 12 |
| description | <jats:p>Abstract. We describe several new ice velocity maps produced by the Greenland Ice Mapping Project (GIMP) using Landsat 8 and Copernicus Sentinel 1A/B data. We then focus on several sites where we analyse these data in conjunction with earlier data from this project, which extend back to the year 2000. At Jakobshavn Isbræ and Køge Bugt, we find good agreement when comparing results from different sensors. In a change from recent behaviour, Jakobshavn Isbræ began slowing substantially in 2017, with a midsummer peak that was even slower than some previous winter minima. Over the last decade, we identify two major slowdown events at Køge Bugt that coincide with short-term advances of the terminus. We also examined populations of glaciers in north-west and south-west Greenland to produce a record of speed-up since 2000. Collectively these glaciers continue to speed up, but there are regional differences in the timing of periods of peak speed-up. In addition, we computed trends in winter flow speed for much of the south-west margin of the ice sheet and find little in the way of statistically significant changes over the period covered by our data. Finally, although the consistency of the data is generally good over time and across sensors, our analysis indicates that substantial differences can arise in regions with high strain rates (e.g. shear margins) where sensor resolution can become a factor. For applications such as constraining model inversions, users should factor in the impact that the data's resolution has on their results. </jats:p> |
| doi_str_mv | 10.5194/tc-12-2211-2018 |
| facet_avail | Online, Free |
| finc_class_facet | Geographie, Technik, Geologie und Paläontologie |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNTE5NC90Yy0xMi0yMjExLTIwMTg |
| imprint | Copernicus GmbH, 2018 |
| imprint_str_mv | Copernicus GmbH, 2018 |
| institution | DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3 |
| issn | 1994-0424 |
| issn_str_mv | 1994-0424 |
| language | English |
| last_indexed | 2024-03-01T18:01:34.773Z |
| match_str | joughin2018greenlandicemappingprojecticeflowvelocityvariationatsubmonthlytodecadaltimescales |
| mega_collection | Copernicus GmbH (CrossRef) |
| physical | 2211-2227 |
| publishDate | 2018 |
| publishDateSort | 2018 |
| publisher | Copernicus GmbH |
| record_format | ai |
| recordtype | ai |
| series | The Cryosphere |
| source_id | 49 |
| spelling | Joughin, Ian Smith, Ben E. Howat, Ian 1994-0424 Copernicus GmbH Earth-Surface Processes Water Science and Technology http://dx.doi.org/10.5194/tc-12-2211-2018 <jats:p>Abstract. We describe several new ice velocity maps produced by the Greenland Ice Mapping Project (GIMP) using Landsat 8 and Copernicus Sentinel 1A/B data. We then focus on several sites where we analyse these data in conjunction with earlier data from this project, which extend back to the year 2000. At Jakobshavn Isbræ and Køge Bugt, we find good agreement when comparing results from different sensors. In a change from recent behaviour, Jakobshavn Isbræ began slowing substantially in 2017, with a midsummer peak that was even slower than some previous winter minima. Over the last decade, we identify two major slowdown events at Køge Bugt that coincide with short-term advances of the terminus. We also examined populations of glaciers in north-west and south-west Greenland to produce a record of speed-up since 2000. Collectively these glaciers continue to speed up, but there are regional differences in the timing of periods of peak speed-up. In addition, we computed trends in winter flow speed for much of the south-west margin of the ice sheet and find little in the way of statistically significant changes over the period covered by our data. Finally, although the consistency of the data is generally good over time and across sensors, our analysis indicates that substantial differences can arise in regions with high strain rates (e.g. shear margins) where sensor resolution can become a factor. For applications such as constraining model inversions, users should factor in the impact that the data's resolution has on their results. </jats:p> Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales The Cryosphere |
| spellingShingle | Joughin, Ian, Smith, Ben E., Howat, Ian, The Cryosphere, Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales, Earth-Surface Processes, Water Science and Technology |
| title | Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_full | Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_fullStr | Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_full_unstemmed | Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_short | Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_sort | greenland ice mapping project: ice flow velocity variation at sub-monthly to decadal timescales |
| title_unstemmed | Greenland Ice Mapping Project: ice flow velocity variation at sub-monthly to decadal timescales |
| topic | Earth-Surface Processes, Water Science and Technology |
| url | http://dx.doi.org/10.5194/tc-12-2211-2018 |