近日，中国科学院南京地理与湖泊研究所施坤团队研究了全球湖泊清晰度的时空变化及其对气候和景观驱动因素的响应。该项研究成果发表在2025年10月30日出版的《科学通报》杂志上。

水的净度是影响湖泊生态系统功能和发展的关键因素，通常由塞奇盘深度（SDD）测量，但SDD对全球变暖的复杂响应尚不清楚。

研究组整合了基于landsat的建模数据集，并通过分析大约140万张卫星图像检索了一个时间序列水SDD数据库。该数据集涵盖1995年至2023年期间，提供了全球170,799个大于1 km²湖泊的SDD动态的见解。结果表明，67%的湖泊SDD呈下降趋势，其中39%的湖泊SDD呈显著下降趋势。在全球范围内，湖泊的SDD减少了13%。

然而，亚洲44%的湖泊显示出SDD的增加。研究组认为，流域气候、景观影响和湖内藻华都对SDD的变化有显著影响。气候变暖通过促进永久冻土融化和促进藻类生长而导致北美和欧洲湖泊SDD的减少。相反，观察到的亚洲湖泊SDD的增加主要与周围景观的绿化有关。该发现强调了气候变化影响湖泊SDD的复杂方式，强调了改变的周围景观和湖中藻类生长在形成这些动态中的综合作用。

附：英文原文

Title: Spatiotemporal variations in global lake clarity and responses to climate and landscape drivers

Author: Yunlin Zhang a b c, Kun Shi a b

Issue&Volume: 2025/10/30

Abstract: Water clarity, typically measured by the Secchi disk depth (SDD), is a critical factor influencing the functioning and development of lake ecosystems, yet the complex response of SDD to a warming world is not well understood. Here, we integrated Landsat-based modeling datasets and retrieved a time-series water SDD database by analyzing approximately 1.4 million satellite images. Covering the period from 1995 to 2023, this dataset provides insights into the SDD dynamics of 170,799 lakes larger than 1 km2 worldwide. We show that 67% of the studied lakes have experienced a decreasing trend in SDD, with 39% exhibiting a statistically significant decline. Globally, lakes have experienced a 13% decrease in SDD. However, 44% of lakes in Asia demonstrate an increase in SDD. We propose that watershed climate, landscape influences, and in-lake algal blooms all exert significant impacts on changes in SDD. Climatic warming contributes to SDD decreases in North American and European lakes by promoting permafrost thaw and enhancing algal growth. Conversely, the observed increases in SDD in Asian lakes are primarily associated with the greening of surrounding landscapes. Our findings highlight the complex ways in which climate change affects lake SDD, emphasizing the combined roles of altered surrounding landscapes and in-lake algal growth in shaping these dynamics.

DOI: 10.1016/j.scib.2025.10.045

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927325011016