巴塔哥尼亚内格罗河径流量重建（1197-2023）

发源于安第斯山脉的河流是南美洲农业和社会需求的重要水源，却日益受到气候变化的威胁。本研究利用安第斯山脉中南部山麓地区的树轮记录，重建了巴塔哥尼亚北部内格罗河过去827年的径流变化。重建结果显示，近几十年来河流流量出现史无前例的下降。厄尔尼诺-南方涛动和南半球环状模带来的水汽是关键水源，但气温上升增加了大气对水汽的需求，导致可用水量减少。南极放大效应进一步扰乱环流模式并加速变暖进程，加剧了区域干旱化。自20世纪末以来，内格罗河流量以每十年约10%的速率持续减少。不同排放情景下的预测均显示流量将持续下降，凸显出亟需制定适应性水资源管理策略以缓解该地区日益加剧的水资源短缺风险。

Rivers originating in the Andes Mountains serve as critical water sources for agricultural and societal needs in South America, yet they are increasingly threatened by climate change. This study reconstructs 827 years of runoff variations in the Negro River of northern Patagonia using tree-ring records from the mid-southern Andean piedmont regions. The reconstruction results show that river flow has experienced an unprecedented decline in recent decades. Water vapor transported by the El Niño-Southern Oscillation (ENSO) and the Southern Hemisphere Annular Mode (SAM) acts as a key water source, but rising temperatures increase atmospheric water vapor demand, leading to reduced available water resources. Antarctic Amplification further disrupts atmospheric circulation patterns and accelerates regional warming, exacerbating local aridification. Since the late 20th century, the runoff of the Negro River has continuously decreased at a rate of approximately 10% per decade. Projections under different emission scenarios all indicate that river flow will continue to decline, highlighting the urgent need to develop adaptive water resource management strategies to mitigate the escalating risk of water scarcity in this region.

搜集汇总

背景与挑战

背景概述

该数据集基于树轮记录重建了巴塔哥尼亚北部内格罗河1197年至2023年的径流量变化，时间跨度长达827年。核心发现是近几十年来河流流量出现史无前例的下降，主要受气候变化（如气温上升和南极放大效应）驱动，导致区域干旱化，流量以每十年约10%的速率减少，凸显了水资源短缺风险。数据以xlsx格式存储，适用于古气候、水文和气候变化研究。