Reconstructing Storm-Surge-Induced Deformation in Hong Kong Using Tide-Gauge-Constrained Nearshore Sea-Level Anomalies

This dataset contains packed NetCDF files (`{EVENT}_{t_start}–{t_end}_packed.nc`) providing hourly, spatially gridded reconstructions of storm-surge-induced elastic deformation and the effective storm-surge sea-level anomaly field over the Hong Kong coastal region. Six files are provided in total, covering seven tropical-cyclone events during 2017–2022: Merbok, Hato, Pakhar, Khanun, Mangkhut, Higos, and Nalgae. Typhoon Hato and Typhoon Pakhar struck in rapid succession (23 and 27 August 2017, respectively) and their time windows overlap; they are therefore combined into a single file whose time axis spans both events continuously. The output domain is a 4° × 4° subdomain centered on Hong Kong, on an ETOPO2022-aligned 15 arc-second grid (~450 m in latitude). The time axis covers the storm window at hourly cadence. Each file contains four variables: - `tvim_essf_m` (time, lat, lon) [m] — Effective Storm-Surge Sea-level anomaly Field (ESSF), masked by the Time-Varying Inundation Mask (TVIM). Ocean/land mask applied; cells that are dry at a given timestep are set to NaN.- `disp_up_mm` (time, lat, lon) [mm] — Vertical (upward positive) elastic displacement- `disp_north_mm` (time, lat, lon) [mm] — Northward elastic displacement- `disp_east_mm` (time, lat, lon) [mm] — Eastward elastic displacement All variables are stored as float32 with zlib compression (level 5). The ESSF (`tvim_essf_m`) is constructed by augmenting the AVISO DAC (ERA5-forced) baseline with tide-gauge-constrained corrections from the Hong Kong Observatory network, using a spatially regularized Helmholtz-type assimilation. The Time-Varying Inundation Mask (TVIM) is derived from the augmented full water level together with hydraulic connectivity to the open ocean, allowing the wet domain to expand and contract dynamically with tide and surge. Elastic displacements are computed by convolving the TVIM-masked, density-weighted effective water column with SPOTL load Green's functions (Gutenberg–Bullen A Earth model with oceanic crust) over a 9° × 9° loading domain, and extracted on the nested 4° × 4° output domain.