The ROSETTA-Ice gravity data set contains gravity measurements taken over the Ross Ice Shelf in Antarctica. A Dynamic Gravity Systems (DgS) gravimeter, a GNS Science ZLS gravimeter, and an iMAR iNAT-RQH-0018-GUG were used to collect this data set. The ROSETTA-Ice project flew three campaigns for three consecutive years during November and December with the IcePod. A total of 43 flights were flown. Table 1. Campaign, Project Year, and Description ------------------------------------------------ Campaign (Year): Description AN02 (2015): The first ROSETTA-Ice campaign was flown during November and December of 2015. AN03 (2016): The second ROSETTA-Ice campaign was flown during November and December of 2016. AN04 (2017): The third ROSETTA-Ice campaign was flown during November and December of 2017. --------------------------- File Format and Information --------------------------- The gravity data were exported from Geosoft in comma-separated values file format (.csv). This gravity data set is a combination of all three sensors (DgS, ZLS, and iMAR) from the first two campaigns (AN02 and AN03) and is in support of the following publication: Tinto, K. J., Padman, L., Siddoway, C. S., Springer, S. R., Fricker, H. A., Das, I., Caratori Tontini, F., Porter, D. F., Frearson, N. P., Howard, S. L., Siegfried, M. R., Mosbeux, C., Becker, M. K., Bertinato, C., Boghosian, A., Brady, N., Burton, B. L., Chu, W., Cordero, S. I., Dhakal, T., Dong, L., Gustafson, C. D., Keeshin, S., Locke, C., Lockett, A., O'Brien, G., Spergel, J. J., Starke, S. E., Tankersley, M., Wearing, M. G., & Bell, R. E. (2019). Ross Ice Shelf response to climate driven by the tectonic imprint on seafloor bathymetry. Nature Geoscience, 12( 6), 441– 449. https://doi.org/10.1038/s41561‐019‐0370‐2 https://www.nature.com/articles/s41561-019-0370-2 ---------------------- File Naming Convention ---------------------- rs_2019_grav.csv Data were named according the following file naming convention: ___.csv Table 2. File Naming Convention ------------------------------- Variable: Description: Project rs for the ROSETTA-Ice project Publication year Year of publication Sensor type IcePod sensor type .csv Indicates comma-separated ASCII text file format (.txt). --------- File Size --------- The gravity data set is approximately 44 MB. ---------------- Spatial Coverage ---------------- The approximate spatial coverage of the ROSETTA-Ice survey is below. Southernmost Latitude: 86° S Northernmost Latitude: 78° S Westernmost Longitude: 150° W Easternmost Longitude: 161° E ----------------- Temporal Coverage ----------------- 09 November 2015 to 04 December 2017 ROSETTA-Ice campaigns were conducted on an annual basis for three consecutive years during November and December. --------------------- Parameter or Variable --------------------- This ROSETTA-Ice gravity data set contains gravity measurements taken over the Ross Ice Shelf from all three sensors from the first two campaigns. Table 3. Gravity CSV file Parameters, Units, and Description (10 Hz) ---------------------------------------------------------------------------- Name (Units): Description Line Number: The ROSETTA-Ice survey line number Latitude (degrees): Latitude decimal degrees WGS84 Longitude (degrees): Longitude decimal degrees WGS84 unixtime (seconds): The number of seconds that have elapsed since midnight (00:00:00 UTC) on January 1st, 1970 Height (meters): Height above WGS84 ellipsoid x (meters): Polar stereographic projected coordinates true to scale at 71° S y (meters): Polar stereographic projected coordinates true to scale at 71° S FAG_levelled (mGal): Levelled free air gravity --------------------- Gravity Data Coverage --------------------- 41 gravity flights were flown by the ROSETTA-Ice campaigns over three consecutive years. AN02 (2015): F1003-F1019 AN03 (2016): F1001-F1010 AN04 (2017): F1001-F1014 ------------------------------- Data Acquisition and Processing ------------------------------- The gravity data set was acquired on two gravimeters. A Dynamic Gravity Systems (DgS) gravimeter and a GNS Science ZLS gravimeter. DGS gravity data was processed in MATLAB with a script developed by Nigel Brady at Dynamic Gravity Systems (DgS). ZLS gravity data was processed in Geosoft with a script developed by Fabio Caratori Tontini of GNS Science. -------- Contacts -------- Robin Bell Lamont-Doherty Earth Observatory of Columbia University 108E Oceanography 61 Route 9W - PO Box 1000 Palisades, NY 10964-8000 USA Email: robinb@ldeo.columbia.edu -------------------- Document Information -------------------- Document Creation Date: 04 February 2019 Document Revision Date: 15 October 2019