Ferdinand K.J. Oberle 20221115 comma-delimited text data release DOI:10.5066/P9XQAMW8 Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9XQAMW8 https://www.sciencebase.gov/catalog/item/6345dc5fd34e342aee086456 This data table includes in-situ near-shore seawater measurements of excess radon (Rn-222), tide and crater lake water levels and salinity collected in Kalaupapa, Moloka'i, Hawaii. Radon (Rn-222) data were collected to characterize the advection rate of groundwater onto the near-shore reef. When analyzed in conjunction with measurements of changing water levels from tides and crater lake water levels, the data can be used to assess the potential for terrestrial groundwater intrusion on the reef and the sources and fate of these water masses. Additional information about the field activity from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-692-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20141212 20170312 ground condition at time data were collected Complete None planned -156.9852 -156.9660 21.1923 21.1878 ISO 19115 Topic Category biota geoscientificInformation Data Categories for Marine Planning Water Column Features USGS Thesaurus time series datasets marine water quality Marine Realms Information Bank (MRIB) keywords physical oceanography None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:6345dc5fd34e342aee086456 Geographic Names Information System (GNIS) Molokai State of Hawaii Kalaupapa None United States of America None USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-460-4747 pcmsc_data@usgs.gov Raw data from the DURRIDGE RAD7 radon detector were processed using the manufacturers software, DURRIDGE CAPTURE, on a Dell Personal Computer running Windows 7 Operating System. Burnett, W.C. Kim, G. Lane-Smith, D. 2001 Burnett, W.C., Kim, G., and Lane-Smith, D., 2001, A continuous monitor for assessment of 222Rn in the coastal ocean: Journal of Radioanalytical and Nuclear Chemistry, v. 249, p. 167–172 https://doi.org/10.1023/A:1013217821419 No formal attribute accuracy tests were conducted. Data fall within expected ranges. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The stated accuracy of the GPS unit used to determine the location of the instruments is +/- 5 m. Radon (Rn-222) concentration data were collected with a DURRIDGE RAD7 radon detector. The alpha decay of Rn-222 was detected at 3-minute intervals with the RAD7 in SNIFF mode. In SNIFF mode, the instrument detects radon entry points and gushers, and it recovers from high radon exposures in minutes. At the end of each run, the detector printed out a complete report. The RAD7 data were QA/QC’d, and raw counts of radon were exported using the manufacturer’s CAPTURE software. 20221011 Point Point 464269 0.00001 0.00001 Decimal degrees D_WGS_1984 WGS_1984 6378137.0 298.257223563 Kala16_Rn_data.csv Comma Separated Value (CSV) file containing data. Producer Defined Date Date and time referenced to Universal Coordinate Time Global Positioning System 12/12/14 0:00 3/12/17 17:40 MM/DD/YY hour:minutes 1 Excess Radon (dpm/m3) Excess Radon Producer Defined << empty cell >> No data were recorded Producer defined 301 253832 Disintegrations per minute per cubic meter 1 Water Level (m) Water Level Producer Defined 0.011 6.522 meters 0.001 Conductivity (μS/cm) Conductivity Producer Defined << empty cell >> No data were recorded Producer defined 180 55399 Microsiemens per centimeter 1 Latitude (Decimal Degrees) Latitude in decimal degrees Global Positioning System 21.1878 21.1923 decimal degrees 0.0001 Longitude (Decimal Degrees) Longitude in decimal degrees Global Positioning System -156.9852 -156.9660 decimal degrees 0.0001 The first line of the csv file is a header line. U.S. Geological Survey U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov These data are available in comma-delimited ascii csv format contained in a single file (Kala16_Rn_data.csv) accompanied by CMGDS FGDC-compliant metadata. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. comma-delimited text 20180818 CSV ascii text file contains the data. none 17.68 https://www.sciencebase.gov/catalog/file/get/6345dc5fd34e342aee086456 https://doi.org/10.5066/P9XQAMW8 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zip file of the data and metadata. The second link points to the landing page for the data release. None. These data can be viewed with any text editor software. 20221115 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-460-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998