权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Spatial and temporal variability of stable oxygen isotopes in wood of pine trees on Corsica as indicators of current and past hydroclimate

科西嘉岛松树木材中稳定氧同位素的时空变化作为当前和过去水文气候的指标

基本信息

批准号：
318144621
负责人：
Dr. Sonja Szymczak
金额：
--
依托单位：
Laboratoire dHydrogéologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/318144621?language=en
关键词：
Spatial temporal variability stable oxygen

项目摘要

A dendroisotopic study shall reveal oxygen isotope variability in wood, needle water and xylem water from pine trees on Corsica in intraannual resolution. The study will be based on two pine species (Pinus nigra and Pinus pinaster) along an east-west transect through the Renoso massif in the south of the island. Due to the alignment, the selected sites cover the full range of Corsican climate from coastal locations with mediterranean climate to alpine conditions with continuous snow cover for several months. The overall aim of the study is to enhance our understanding of the physiological control and the environmental forcing of short-term oxygen isotope variability in pine trees in a mediterranean ecosystem. High-resolution hydroclimatic and dendroecologic data collected within the project bundle CorsicArchive will help to interpret the oxygen isotope chronologies and enables us to trace back sources of isotope variability, e.g. different water sources, origin of air masses. The combination of short-term high-resolution chronologies with already existing long-term chronologies in annual resolution enables us to transfer the short-term variability on a longer timescale and to model changes of isotope fractionation processes under different climatic regimes and climate changes scenarios in the Mediterranean area.

树木同位素研究将揭示科西嘉松树的木材、针叶水和木质部水的氧同位素变异性。这项研究将以两个松树品种（黑松和松树）为基础，沿着沿着该岛南部雷诺索森林的东西向样带进行。由于路线，选定的地点涵盖了科西嘉岛的全部气候，从地中海气候的沿海地区到连续几个月积雪的高山条件。这项研究的总体目标是提高我们对地中海生态系统中松树短期氧同位素变化的生理控制和环境强迫的理解。CorsicArchive项目包中收集的高分辨率水文气候和树木生态数据将有助于解释氧同位素年表，并使我们能够追溯同位素变异的来源，例如不同的水源，气团的起源。结合短期高分辨率年表与现有的长期年表在年度分辨率，使我们能够在较长的时间尺度上转移的短期变化和不同的气候制度和气候变化的情况下，在地中海地区的同位素分馏过程的变化模型。