Water Resources Programme - Monitoring Programme Data. Introduction WISER is a self-service platform for data of the Global Networks of Isotopes in Precipitation (GNIP) and Rivers (GNIR), hosted within the IAEA's repository for technical resources (NUCLEUS).
Log-in WISER is accessible to registered NUCLEUS users. It uses the NUCLEUS-Single-Sign-On (SSO) concept, which allows using the same log-in credentials (username and password), for a number of NUCLEUS applications. When accessing WISER through the URL you will be forwarded to the NUCLEUS log-in page. NUCLEUS accounts are administrated by IAEA IT Service Desk; a help page for these accounts is available at Menu and data structure WISER features three main data services: • GNIP data: Data from monthly and event-based precipitation observations, and a few water vapour collection sites. Global Networks of Isotopes in Precipitation and Rivers (GNIP, GNIR) Catalogue Image.
Posibilities databases. Organic pollutants and their correlation with stable isotopes in vegetation from King George Island, Antarctica - ScienceDirect. 2.2.
Chemical analyses Organochlorine (OC) analyses were performed at University of São Paulo (Brazil). Laboratory protocol was based on MacLeod et al. (1986) and quality assurance/quality control (QA/QC) followed guidelines described by Wade and Cantillo (1994). Briefly, 10 g of wet sample were ground with anhydrous Na2SO4 and surrogate (PCB103) was added before extraction in a Soxhlet apparatus for 8 h with 80 mL of n-hexane and methylene chloride (1:1, v/v). The extract was concentrated to 1 mL and cleaned up in a column filled (from top to bottom) with 16 g alumina and 8 g silica gel (both 5% deactivated with water). OC analyses were run in a gas chromatograph equipped with an electron capture detector (GC-ECD, Agilent Technologies, model 6890N).
Response of stable carbon isotope in epilithic mosses to atmospheric nitrogen deposition. Volume 158, Issue 6, June 2010, Pages 2273–2281 Advances of air pollution science: from forest decline to multiple-stress effects on forest ecosystem services Edited By Marcus Schaub, Rainer Matyssek and Gerhard Wieser Abstract Epilithic mosses are characterized by insulation from substratum N and hence meet their N demand only by deposited N.
This study investigated tissue C, total Chl and δ13C of epilithic mosses along 2 transects across Guiyang urban (SW China), aiming at testing their responses to N deposition. Keywords Elevated N deposition; Bryophyte; Carbon isotopic discrimination; Photosynthesis; City ecosystem Choose an option to locate/access this article: Hydrogen and oxygen isotope ratios in human hair are related to geography. Author Affiliations Contributed by Thure E.
Cerling, December 28, 2007 (received for review October 15, 2007) Abstract We develop and test a model to predict the geographic region-of-origin of humans based on the stable isotope composition of their scalp hair. You are what you eat. Interpreting the Data: Isotope terminology Let's quickly review some basic isotope terminology, so you know how to compare your isotope values to foods and other visitors on the graphs.
When we analyze a fingernail sample for isotope ratios, we are comparing the relative amounts of a "heavier" isotope and a "lighter" isotope in your fingernail to trace what you ate. Tracking Animal Migration with Stable Isotopes. An Error Occurred Setting Your User Cookie. Bryophyte cover on trees as proxy for air humidity in the tropics. Abstract Climatic conditions are a prime candidate to explain local patterns of biodiversity and consequently there is great need of on-site climatic measurements.
Among them, however, air humidity is notoriously difficult and time-consuming to measure, and it has been proposed that the epiphytic bryophyte cover can be used as an indicator of long-term air humidity conditions. Here we explore the utility of visually estimated epiphytic bryophyte cover on large canopy branches as a proxy for air humidity at 26 study sites in tropical forests where we measured microclimate for at least 12 months. Across all sites, bryophyte cover was weakly related to relative air humidity (R2 = 0.17), but when we separated highland (1800–3500 m elevation) from lowland (<1800 m) sites, relative air humidity showed significant and distinct relations to bryophyte cover (R2 = 0.36–0.62), whereas temperature was related to bryophyte cover only in the lowlands (R2 = 0.36).