Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data
Monitoring the hydrological activities of subglacial lakes is critical to understanding the subglacial hydrological system and evaluating the internal mass changes of the Antarctic ice sheet. Drainage or filling events of active lakes lead to elevation changes in the ice surface. These changes can b...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-02-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/14/4/898 |
| _version_ | 1797476822986784768 |
|---|---|
| author | Yi Fan Weifeng Hao Baojun Zhang Chao Ma Shengjun Gao Xiao Shen Fei Li |
| author_facet | Yi Fan Weifeng Hao Baojun Zhang Chao Ma Shengjun Gao Xiao Shen Fei Li |
| author_sort | Yi Fan |
| collection | DOAJ |
| description | Monitoring the hydrological activities of subglacial lakes is critical to understanding the subglacial hydrological system and evaluating the internal mass changes of the Antarctic ice sheet. Drainage or filling events of active lakes lead to elevation changes in the ice surface. These changes can be observed by satellite altimetry, but the monitoring must be conducted continuously since the water movements in active subglacial lakes may occur frequently. We used CryoSat-2 Baseline-D and ICESat-2 data from 2010 to 2020 to obtain the time series of the ice surface elevation changes for 17 active lakes. We also evaluated the uncertainty of the time series derived from the CryoSat-2 data by cross-validation. The mean and RMS of the biases between the CryoSat-2-based and ICESat-2-based time series are generally less than 0.3 m and 1.0 m, respectively. However, the mean and RMS are greater over the lakes with rough ice surfaces, such as Whillans<sub>6</sub>, KT1, Mac3, and Slessor<sub>23</sub>. The drainage and filling events continue exhibiting in the extended period and the hydrological activities of SLW, L12, Whillans<sub>6</sub>, L78, and Mac1 occurred periodically. Furthermore, we inferred the hydrological connections between the lakes combining simulated water pathways. |
| first_indexed | 2024-03-09T21:09:12Z |
| format | Article |
| id | doaj.art-6af7ee73521241719ef75dca7d08e9d1 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T21:09:12Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-6af7ee73521241719ef75dca7d08e9d12023-11-23T21:53:51ZengMDPI AGRemote Sensing2072-42922022-02-0114489810.3390/rs14040898Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry DataYi Fan0Weifeng Hao1Baojun Zhang2Chao Ma3Shengjun Gao4Xiao Shen5Fei Li6Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaChinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaChinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaChinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaChinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaChinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaChinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, ChinaMonitoring the hydrological activities of subglacial lakes is critical to understanding the subglacial hydrological system and evaluating the internal mass changes of the Antarctic ice sheet. Drainage or filling events of active lakes lead to elevation changes in the ice surface. These changes can be observed by satellite altimetry, but the monitoring must be conducted continuously since the water movements in active subglacial lakes may occur frequently. We used CryoSat-2 Baseline-D and ICESat-2 data from 2010 to 2020 to obtain the time series of the ice surface elevation changes for 17 active lakes. We also evaluated the uncertainty of the time series derived from the CryoSat-2 data by cross-validation. The mean and RMS of the biases between the CryoSat-2-based and ICESat-2-based time series are generally less than 0.3 m and 1.0 m, respectively. However, the mean and RMS are greater over the lakes with rough ice surfaces, such as Whillans<sub>6</sub>, KT1, Mac3, and Slessor<sub>23</sub>. The drainage and filling events continue exhibiting in the extended period and the hydrological activities of SLW, L12, Whillans<sub>6</sub>, L78, and Mac1 occurred periodically. Furthermore, we inferred the hydrological connections between the lakes combining simulated water pathways.https://www.mdpi.com/2072-4292/14/4/898Antarcticsatellite altimetryice surface elevation changesubglacial lake activitysubglacial hydrology |
| spellingShingle | Yi Fan Weifeng Hao Baojun Zhang Chao Ma Shengjun Gao Xiao Shen Fei Li Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data Remote Sensing Antarctic satellite altimetry ice surface elevation change subglacial lake activity subglacial hydrology |
| title | Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data |
| title_full | Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data |
| title_fullStr | Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data |
| title_full_unstemmed | Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data |
| title_short | Monitoring the Hydrological Activities of Antarctic Subglacial Lakes Using CryoSat-2 and ICESat-2 Altimetry Data |
| title_sort | monitoring the hydrological activities of antarctic subglacial lakes using cryosat 2 and icesat 2 altimetry data |
| topic | Antarctic satellite altimetry ice surface elevation change subglacial lake activity subglacial hydrology |
| url | https://www.mdpi.com/2072-4292/14/4/898 |
| work_keys_str_mv | AT yifan monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata AT weifenghao monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata AT baojunzhang monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata AT chaoma monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata AT shengjungao monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata AT xiaoshen monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata AT feili monitoringthehydrologicalactivitiesofantarcticsubglaciallakesusingcryosat2andicesat2altimetrydata |