Raster datasets

Citation of gridded data products

The following links provide access to global grids of the hydrogen and oxygen isotope composition of precipitation and environmental waters in GIS raster formats. Use the links below to access downloadable file bundles archived with 7-zip.

Global and Regional Precipitation

Files below include global and regional raster files in GeoTiff format. Both bundles include 52 grids, containing mean climatological predictions and uncertainty estimates (1 standard deviation) for 12 months and for mean annual precipitation for both H and O. The mean annual and monthly precipitation grids are updated versions of those produced in the Bowen and Revenaugh (2003) and Bowen et al. (2005) papers. Global grids were made using the OIPC v3.2 database, and USA grids were made using database v3.1. Grid resolution is 5 arc-minutes for the global grids and 1 km for the USA grids. Both archives are large (600 MB for global, 2.0 GB for USA). Monthly grids have been adjusted for consistency with annual values (see version notes for OIPC2.0).

Global Precipitation
USA High-resolution Precipitation

The zip archive below offers global grids representing growing season (defined as months with mean temperature greater than 0 degrees C) average precipitation at 5 arc-minute resolution and uncertainty estimates (1 standard deviation) for these predictions. These grids are updated versions of those produced by Bowen et al. (2005), made using the OIPC v3.2 database. The files are in GeoTiff format, and the archive is ~45 MB in size.

Global Growing Season Precipitation

Evaporation Line Slopes

The archive below includes maps of predicted evaporation line slopes for lake and soil water evaporation for the continguous USA and adjacent areas. The methodology used is described in Bowen et al. (2018), and produces estimates that reflect annual, evaporation flux weighted, average slopes. Climate data used were for the 2007 water year. Grids are in GeoTiff format at 1 km resolution and the archive is 203 MB in size.

USA Evaporation Line Slopes

South African Tap Water

The archive below includes maps of H and O isotope ratios and deuterium excess values for tap water in South Africa. The data layers are documented in the file readme.txt included in the the zip archive. The files were prepared using the method of Bowen et al. (2007) and a new data set of West et al. (in prep.)

ZA tap water

USA River Water

The archive below contains maps of H and O isotope ratios for surface waters (rivers, streams) across the contiguous USA at 1 km resolution and the uncertainty of these predictions. These files represent the residual-corrected spatiotemporal model results of Bowen et al. (2011).

Contiguous USA Surface Waters

USA Tap Water

The archive below contains updated maps of the H and O isotope ratios for tap waters across the contiguous USA at 1 km resolution. The methodology of Bowen et al. (2007) was applied using the OIPC v3.1 high-resolution mean-annual USA precipitation grids and an updated tap water dataset downloaded from the wiDB. The R code used to produce the maps is available here.

Contiguous USA Tap Waters

Circum-Caribbean Sr Isotopes

The archives below contain grids representing modeled 87Sr/86Sr values for bedrock, Sr derived from a combination of weathering of local bedrock, aerosols, and seaspray, and catchment-integrated river water dissolved Sr for parts of Central and South America and the Caribbean islands. These files contain data presented in figures 2 and 5B of Bataille et al. (2012) and from the application of the runoff model of Bataille and Bowen (2012) to the multi-source weathered Sr layer. All files are GeoTiffs at 30 arc-seconds resolution.

Circum-Caribbean Sr

USA Sr Isotopes

The archive below contains grids representing modeled 87Sr/86Sr values for bedrock, Sr derived from local bedrock weathering, and catchment-integrated river water dissolved Sr. These files contain data presented in figures 6B, 9A and 9B in Bataille and Bowen (2012). All files are GeoTiffs at 1 km resolution.

Contiguous USA Sr

 

Isoscapes: Understanding Movement, Pattern, and Process on Earth Through Isotope Mapping
(ed. West, Bowen, Dawson and Tu; Springer)
All material copyright 2003-2022 by Gabriel Bowen | Supported by CHPC at the University of Utah
Contact me: gabe.bowen@utah.edu