Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements
We report annual snow accumulation rates from 1959 to 2004 along a 250 km segment of the Expéditions Glaciologiques Internationales au Groenland (EGIG) line across central Greenland using Airborne SAR/Interferometric Radar Altimeter System (ASIRAS) radar layers and high resolution neutron-probe (NP)...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2016
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-10-1679-2016 https://noa.gwlb.de/receive/cop_mods_00011742 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011699/tc-10-1679-2016.pdf https://tc.copernicus.org/articles/10/1679/2016/tc-10-1679-2016.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00011742 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00011742 2023-05-15T16:27:57+02:00 Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements Overly, Thomas B. Hawley, Robert L. Helm, Veit Morris, Elizabeth M. Chaudhary, Rohan N. 2016-08 electronic https://doi.org/10.5194/tc-10-1679-2016 https://noa.gwlb.de/receive/cop_mods_00011742 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011699/tc-10-1679-2016.pdf https://tc.copernicus.org/articles/10/1679/2016/tc-10-1679-2016.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-10-1679-2016 https://noa.gwlb.de/receive/cop_mods_00011742 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011699/tc-10-1679-2016.pdf https://tc.copernicus.org/articles/10/1679/2016/tc-10-1679-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/tc-10-1679-2016 2022-02-08T22:56:23Z We report annual snow accumulation rates from 1959 to 2004 along a 250 km segment of the Expéditions Glaciologiques Internationales au Groenland (EGIG) line across central Greenland using Airborne SAR/Interferometric Radar Altimeter System (ASIRAS) radar layers and high resolution neutron-probe (NP) density profiles. ASIRAS-NP-derived accumulation rates are not statistically different (95 % confidence interval) from in situ EGIG accumulation measurements from 1985 to 2004. ASIRAS-NP-derived accumulation increases by 20 % below 3000 m elevation, and increases by 13 % above 3000 m elevation for the period 1995 to 2004 compared to 1985 to 1994. Three Regional Climate Models (PolarMM5, RACMO2.3, MAR) underestimate snow accumulation below 3000 m by 16–20 % compared to ASIRAS-NP from 1985 to 2004. We test radar-derived accumulation rates sensitivity to density using modeled density profiles in place of NP densities. ASIRAS radar layers combined with Herron and Langway (1980) model density profiles (ASIRAS-HL) produce accumulation rates within 3.5 % of ASIRAS-NP estimates in the dry snow region. We suggest using Herron and Langway (1980) density profiles to calibrate radar layers detected in dry snow regions of ice sheets lacking detailed in situ density measurements, such as those observed by the Operation IceBridge campaign. Article in Journal/Newspaper Greenland Groenland The Cryosphere Niedersächsisches Online-Archiv NOA Greenland Langway ENVELOPE(-139.783,-139.783,-75.483,-75.483) The Cryosphere 10 4 1679 1694 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Overly, Thomas B. Hawley, Robert L. Helm, Veit Morris, Elizabeth M. Chaudhary, Rohan N. Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
We report annual snow accumulation rates from 1959 to 2004 along a 250 km segment of the Expéditions Glaciologiques Internationales au Groenland (EGIG) line across central Greenland using Airborne SAR/Interferometric Radar Altimeter System (ASIRAS) radar layers and high resolution neutron-probe (NP) density profiles. ASIRAS-NP-derived accumulation rates are not statistically different (95 % confidence interval) from in situ EGIG accumulation measurements from 1985 to 2004. ASIRAS-NP-derived accumulation increases by 20 % below 3000 m elevation, and increases by 13 % above 3000 m elevation for the period 1995 to 2004 compared to 1985 to 1994. Three Regional Climate Models (PolarMM5, RACMO2.3, MAR) underestimate snow accumulation below 3000 m by 16–20 % compared to ASIRAS-NP from 1985 to 2004. We test radar-derived accumulation rates sensitivity to density using modeled density profiles in place of NP densities. ASIRAS radar layers combined with Herron and Langway (1980) model density profiles (ASIRAS-HL) produce accumulation rates within 3.5 % of ASIRAS-NP estimates in the dry snow region. We suggest using Herron and Langway (1980) density profiles to calibrate radar layers detected in dry snow regions of ice sheets lacking detailed in situ density measurements, such as those observed by the Operation IceBridge campaign. |
format |
Article in Journal/Newspaper |
author |
Overly, Thomas B. Hawley, Robert L. Helm, Veit Morris, Elizabeth M. Chaudhary, Rohan N. |
author_facet |
Overly, Thomas B. Hawley, Robert L. Helm, Veit Morris, Elizabeth M. Chaudhary, Rohan N. |
author_sort |
Overly, Thomas B. |
title |
Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements |
title_short |
Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements |
title_full |
Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements |
title_fullStr |
Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements |
title_full_unstemmed |
Greenland annual accumulation along the EGIG line, 1959–2004, from ASIRAS airborne radar and neutron-probe density measurements |
title_sort |
greenland annual accumulation along the egig line, 1959–2004, from asiras airborne radar and neutron-probe density measurements |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-1679-2016 https://noa.gwlb.de/receive/cop_mods_00011742 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011699/tc-10-1679-2016.pdf https://tc.copernicus.org/articles/10/1679/2016/tc-10-1679-2016.pdf |
long_lat |
ENVELOPE(-139.783,-139.783,-75.483,-75.483) |
geographic |
Greenland Langway |
geographic_facet |
Greenland Langway |
genre |
Greenland Groenland The Cryosphere |
genre_facet |
Greenland Groenland The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-10-1679-2016 https://noa.gwlb.de/receive/cop_mods_00011742 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011699/tc-10-1679-2016.pdf https://tc.copernicus.org/articles/10/1679/2016/tc-10-1679-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-10-1679-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
4 |
container_start_page |
1679 |
op_container_end_page |
1694 |
_version_ |
1766017560975769600 |