True Polar Wander Driven by Artificial Water Impoundment: 1835–2011
Abstract Artificial water impoundment contributed significantly to global mean sea level change during the 20th century and is included in recent studies of the budget of 20th century true polar wander (TPW). We adopt a recent global database of water impoundment that accounts for 72% of an integrat...
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| Format: | Article |
| Language: | English |
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Wiley
2025-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL115468 |
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| author | N. Valencic E. Speiser E. Doi E. T. Lee B. Ford A. Hatzius D. Komaravalli B. Erdmann W. Hawley J. X. Mitrovica |
| author_facet | N. Valencic E. Speiser E. Doi E. T. Lee B. Ford A. Hatzius D. Komaravalli B. Erdmann W. Hawley J. X. Mitrovica |
| author_sort | N. Valencic |
| collection | DOAJ |
| description | Abstract Artificial water impoundment contributed significantly to global mean sea level change during the 20th century and is included in recent studies of the budget of 20th century true polar wander (TPW). We adopt a recent global database of water impoundment that accounts for 72% of an integrated global volume estimate and compute the associated TPW path from 1835 to 2011 CE. We find a highly non‐monotonic pole path, with an integrated path length of 113.4 cm, a net displacement of 20.5 cm in the direction 103.4°E from 1835 to 1954 CE and 57.1 cm in the direction −117.5°E from 1954 to 2011. Across the first half of the 20th century, the mean rate of TPW was 0.30 cm/yr, while in the second half of the century it was 0.95 cm/yr. Finally, we demonstrate that the 28% of the total global water impoundment missing in our database likely had a negligible impact on polar motion. |
| format | Article |
| id | doaj-art-d78ef6b7e2654b9e80211c2f58f23742 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-d78ef6b7e2654b9e80211c2f58f237422025-08-20T03:26:38ZengWileyGeophysical Research Letters0094-82761944-80072025-05-015210n/an/a10.1029/2025GL115468True Polar Wander Driven by Artificial Water Impoundment: 1835–2011N. Valencic0E. Speiser1E. Doi2E. T. Lee3B. Ford4A. Hatzius5D. Komaravalli6B. Erdmann7W. Hawley8J. X. Mitrovica9Department of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USADepartment of Earth and Planetary Sciences Harvard University Cambridge MA USAAbstract Artificial water impoundment contributed significantly to global mean sea level change during the 20th century and is included in recent studies of the budget of 20th century true polar wander (TPW). We adopt a recent global database of water impoundment that accounts for 72% of an integrated global volume estimate and compute the associated TPW path from 1835 to 2011 CE. We find a highly non‐monotonic pole path, with an integrated path length of 113.4 cm, a net displacement of 20.5 cm in the direction 103.4°E from 1835 to 1954 CE and 57.1 cm in the direction −117.5°E from 1954 to 2011. Across the first half of the 20th century, the mean rate of TPW was 0.30 cm/yr, while in the second half of the century it was 0.95 cm/yr. Finally, we demonstrate that the 28% of the total global water impoundment missing in our database likely had a negligible impact on polar motion.https://doi.org/10.1029/2025GL115468Earth rotationtrue polar wanderwater impoundment1835–2011 |
| spellingShingle | N. Valencic E. Speiser E. Doi E. T. Lee B. Ford A. Hatzius D. Komaravalli B. Erdmann W. Hawley J. X. Mitrovica True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 Geophysical Research Letters Earth rotation true polar wander water impoundment 1835–2011 |
| title | True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 |
| title_full | True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 |
| title_fullStr | True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 |
| title_full_unstemmed | True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 |
| title_short | True Polar Wander Driven by Artificial Water Impoundment: 1835–2011 |
| title_sort | true polar wander driven by artificial water impoundment 1835 2011 |
| topic | Earth rotation true polar wander water impoundment 1835–2011 |
| url | https://doi.org/10.1029/2025GL115468 |
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