Stable Isotopes in Precipitation and Paleoclimatic Archives in Tropical Areas to Improve Regional Hydrological and Climatic Impact Models

Closed for proposals

Project Type

Coordinated Research Project

Project Code

F31004

CRP

1941

Approved Date

8 February 2013

Status

3 - Active - Ongoing

Start Date

4 July 2013

Expected End Date

31 October 2017

Completed Date

23 November 2017

Participating Countries

Argentina
Australia
Bangladesh
Brazil
China
Costa Rica
Ethiopia
France
Ghana
India
Japan
Singapore
United States of America
Viet Nam

Description

Precipitation stable isotopes can be used to trace the water cycle and to interpret paleoclimate archives. Forecasts of natural and future anthropogenic impacts on climate affecting fresh water require a better understanding of the factors controlling regionalized precipitation regimes. This is especially important in tropical areas, where the complexities of atmospheric circulation and the water cycle’s seasonal intensity limit our capacity to predict changes in precipitation patterns and water availability. This CRP focuses on present-day isotope information in modern precipitation and its use for the interpretation and validation of climate and hydrological models, and paleoclimatic archives in tropical regions. Laser spectroscopic technology will facilitate low-cost stable isotope data collection at daily or event-based resolutions, which will be compared to isotope data obtained from various paleoclimate archives in the tropics, to better inform predictive regional and global climate impact models.

Objectives

To improve capability and expertise among Member States in the use of environmental isotopes to better assess impacts of climate change on water resources variability, availability and sustainability.

Specific objectives

Improve interpretation of past climate archives such as speleothems, lake sediments, ice cores, tree rings, etc. using environmental isotopes in order to better understand regional to local climate dynamics and their possible impact on water resources at present and in the future

Improve regional climate and water balance model outputs by using present-day precipitation/vapour isotope data

Initiate/consolidate daily and/or event-based monitoring programmes of precipitation stable isotopes; strengthen laser-based isotope analyses in Member States

Review/assess the level of understanding of the links between stable isotopes of precipitation and the various factors (effects) that control them in tropical regions at different spatial and temporal scales

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