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Conference Paper

Interference of two seasonally changing masses as seen from GRACE and GNSS: Case studies in the Gulf of Carpentaria

Authors

Zheng,  Shuo
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Heki,  Kosuke
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang,  Zizhan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Yan,  Haoming
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Li,  JingWei
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Zheng, S., Heki, K., Zhang, Z., Yan, H., Li, J. (2023): Interference of two seasonally changing masses as seen from GRACE and GNSS: Case studies in the Gulf of Carpentaria, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3827


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020718
Abstract
Tropical coastal regions move landward and oceanward during rain and dry seasons due to land hydrological loads, as observed with seasonal movements of GNSS stations. Here we use GNSS and GRACE data and present a few exceptional cases, i.e., GNSS stations move oceanward during rain seasons. In Northern Australia. stations along the coast of the Gulf of Carpentaria move oceanward during the rain seasons with significant phase shift between the peak subsidence and peak oceanward movement. We explain this as the interaction of two significant seasonally changing masses in ocean and land. Such seasonal mass changes within GOC have been largely overlooked because of insufficient spatial resolution of satellite gravimetry. This study presents a model case for interpreting complicated seasonal surface deformation caused by significant seasonal load changes on land and ocean, often found in coastal areas of half-closed oceans in the world.