TY - JOUR
T1 - A Method to Calculate Elevation-Change Rate of Jakobshavn Isbrae Using Operation IceBridge Airborne Topographic Mapper Data
AU - Wang, Xianwei
AU - Holland, David M.
N1 - Funding Information:
Manuscript received January 8, 2018; revised March 30, 2018; accepted April 11, 2018. Date of publication May 16, 2018; date of current version June 22, 2018. This work was supported in part by the Center for Global Sea Level Change, NYU Abu Dhabi Research Institute, United Arab Emirates, under Grant G1204, in part by the National Science Foundation, USA, under Grant ARC-1304137, and in part by the NASA Oceans Melting Greenland through NYU under Grant NNX15AD55G. (Corresponding author: Xianwei Wang.) X. Wang is with the Center for Global Sea Level Change, New York University Abu Dhabi, Abu Dhabi 129188, United Arab Emirates (e-mail: wangxianwei0304@163.com).
Publisher Copyright:
© 2018 IEEE.
PY - 2018/7
Y1 - 2018/7
N2 - To bridge the data gap between Ice, Cloud, and land Elevation Satellite (ICESat) and the delayed forthcoming ICESat-2, the National Aeronautics and Space Administration has launched the Operation IceBridge (OI) campaign in 2009, which has provided variable data set to reveal snow and ice changes in the Arctic and Antarctic. In this letter, we employ the Airborne Topographic Mapper (ATM) data from OI to detect a five-year (between 2010 and 2015) elevation-change rate of Jakobshavn Isbrae (JI), the largest and fastest flowing outlet glacier in Greenland. Grid elevation of OI ATM is calculated and a method to calculate elevation-change rate using these grid data is implemented. The comparison of repeat grid elevation indicates that our method can generate unbiased elevation data. The uncertainty of grid elevation data using our method is approximately 1.0 m (standard deviation). The five-year average elevation rate of JI over regions with ice velocity ≥300 m/a between 2010 and 2015 was about -5.0 m/a (root mean square uncertainty: 0.7 m/a), with a maximum thinning rate of -18.2 m/a near the terminus of the main trunk. Compared with the previously reported elevation-change rates from earlier periods, JI has now reached a new high thinning record.
AB - To bridge the data gap between Ice, Cloud, and land Elevation Satellite (ICESat) and the delayed forthcoming ICESat-2, the National Aeronautics and Space Administration has launched the Operation IceBridge (OI) campaign in 2009, which has provided variable data set to reveal snow and ice changes in the Arctic and Antarctic. In this letter, we employ the Airborne Topographic Mapper (ATM) data from OI to detect a five-year (between 2010 and 2015) elevation-change rate of Jakobshavn Isbrae (JI), the largest and fastest flowing outlet glacier in Greenland. Grid elevation of OI ATM is calculated and a method to calculate elevation-change rate using these grid data is implemented. The comparison of repeat grid elevation indicates that our method can generate unbiased elevation data. The uncertainty of grid elevation data using our method is approximately 1.0 m (standard deviation). The five-year average elevation rate of JI over regions with ice velocity ≥300 m/a between 2010 and 2015 was about -5.0 m/a (root mean square uncertainty: 0.7 m/a), with a maximum thinning rate of -18.2 m/a near the terminus of the main trunk. Compared with the previously reported elevation-change rates from earlier periods, JI has now reached a new high thinning record.
KW - Airborne Topographic Mapper (ATM)
KW - Greenland
KW - Jakobshavn Isbrae (JI)
KW - Operation IceBridge (OI)
KW - elevation-change rate
KW - thinning
UR - http://www.scopus.com/inward/record.url?scp=85046994942&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85046994942&partnerID=8YFLogxK
U2 - 10.1109/LGRS.2018.2828417
DO - 10.1109/LGRS.2018.2828417
M3 - Article
AN - SCOPUS:85046994942
SN - 1545-598X
VL - 15
SP - 981
EP - 985
JO - IEEE Geoscience and Remote Sensing Letters
JF - IEEE Geoscience and Remote Sensing Letters
IS - 7
ER -