New Zealand Vertical land movement and sea rise projections

UPDATE from version v3: This update corrects a missing scenario (SSP3-7.0) with no VLM from the SLR projections tables. It also includes updated 0 entries for 2005 for both the VLM and noVLM projections.

This dataset provides the estimated vertical land movement around the New Zealand coast and associated sea rise projections described by Naish et al., 2024: 

Naish, T. et al. (2024) The significance of vertical land movements at convergent plate boundaries in probabilistic sea-level projections for AR6 scenarios: the New Zealand case. Earth's Future

README:

NZ SeaRise Data Description

This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0). Users can download two data sets for selected sites: (1) Site details and (2) Sea level projections. A brief description of these data is included below.

1. Site Details

Provides location data and estimates of vertical land movement for each site.

For the VLM file:

id = site location

Lon = longitude

Lat = latitude

Vertical Rate = average annual vertical velocity in mm/yr

Vertical Rate BOP corrected (mm/yr) = average annual vertical velocity in mm/yr with a correction for a movement (see Hamling et al., 2016, Hamling et al., 2022) for details. NOTE: These are the vertical rates used for the sea level projections.

1-sigma uncertainty = Error estimate for vertical velocity in mm/yr

Number of obs = Number of individual scatterers and/or GNSS used to estimate the vertical rate.

QF = Quality factor for vertical velocity estimates of the land surface derived from InSAR data averaged for 2 km-spaced sites (1=good, 5=poor). This factor considers the number of observations available for each coastal location, the radial distance used to bin the observations and the distance to the nearest GNSS station. After selecting the optimal search radius, a distance weighted mean is calculated for of all the points with additional weight given to any available GNSS observations.

Average distance between coastal point and observations =Average distance (in km) of all the points used to estimate the vertical rate from the coastal site indicated by the ID an lon, lat values.

2. Sea level projections tables

Provides sea level projections data for each site. Table ‘NZSeaRise_proj_novlm.csv’ provides projections without estimates of local VLM and table ‘NZSeaRise_proj_vlm.csv’ provides projections that include estimates of local VLM.

Example download table:

Confidence = identifies low or medium confidence projection

siteId = site location

year = Projection year (Common Era)

0.17 = 17th percentile value

0.50 = 50th percentile (mean) value

0.83 = 83rd percentile value

SSP ǀ scenario = Shared Socio-economic Pathway and relevant change in forcing at 2100 in W m2