%0 Journal Article
%T Spatial and Temporal Variation of Stable Isotopes in Precipitation across Costa Rica: An Analysis of Historic GNIP Records
%A Ricardo S¨¢nchez-Murillo
%A Germain Esquivel-Hern¨¢ndez
%A Kristen Welsh
%A Erin S. Brooks
%A Jan Boll
%A Rosa Alfaro-Sol¨ªs
%A Juan Vald¨¦s-Gonz¨¢lez
%J Open Journal of Modern Hydrology
%P 226-240
%@ 2163-0496
%D 2013
%I Scientific Research Publishing
%R 10.4236/ojmh.2013.34027
%X <span>The location of Costa Rica on the Central American Isthmus creates unique microclimate systems that receive moisture inputs directly from the Caribbean Sea and the Pacific Ocean. In Costa Rica, stable isotope monitoring was conducted by the International Atomic Energy Agency and the World Meteorological Association as part of the worldwide effort entitled Global Network of Isotopes in Precipitation. Sampling campaigns were mainly comprised of monthly-inte</span><span>grated samples during intermittent years from 1990 to 2005. The main goal of this study was to determine spatial and temporal isotopic variations of meteoric waters in Costa Rica using historic records. Samples were grouped in four main regions: Nicoya Peninsula (</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>2</span></sup><span>H = 6.65</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>18</span></sup><span>O</span><span> £­</span><span>0.13; <i>r</i><sup>2</sup></span><span> </span><span>=</span><span> </span><span>0.86); Pacific Coast (</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>2</span></sup><span>H = 7.60</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>18</span></sup><span>O</span><span> </span><span>+</span><span> </span><span>7.95; <i>r</i><sup>2</sup></span><span> </span><span>=</span><span> </span><span>0.99); Carib</span><span>bean Slope (</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>2</span></sup><span>H = 6.97</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>18</span></sup><span>O</span><span> </span><span>+</span><span> </span><span>4.97; <i>r</i><sup>2</sup></span><span> </span><span>=</span><span> </span><span>0.97); and Central Valley (</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>2</span></sup><span>H = 7.94</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>18</span></sup><span>O</span><span> </span><span>+</span><span> </span><span>10.38; <i>r</i><sup>2</sup></span><span> </span><span>=</span><span> </span><span>0.98). The water me</span><span>teoric line for Costa Rica can be defined as </span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>2</span></sup><span>H = 7.61</span><i><span style=\"font-family:Symbol;\"><span>d</span></span></i><sup><span>18</span></sup><span>O</span><span> </span><span>+</span><span> </span><span>7.40 (<i>r</i><sup>2</sup></span><span>
%K Stable Isotopes
%K Costa Rica
%K Precipitation
%K GNIP
%K HYSPLIT Model
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=38886