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最近的多模式卫星观测揭示了西藏相反的湖泊变化

Jiangjun Ran¹, Lin Liu², Guoqing Zhang³

¹Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China.

The Science of the total environment

|November 6, 2023

概括

气候变化正在迅速改变西藏高原的湖泊,观察到明显的南北区域变化. 这些发现凸显了研究短期湖泊动态作为气候指标的必要性.

科学领域:

地球和环境科学地球和环境科学
气候科学气候科学
水文学的水文学

背景情况:

西藏高原作为一个重要的自然实验室研究气候变化的影响,由于有限的人类活动.
以前的研究主要集中在十年的湖泊变化,使得快速的,短期的湖泊进化及其大气驱动因素不清楚.

研究的目的:

调查2015-2020年西藏高原湖泊面积的快速,短期变化.
为了确定这些观测到的湖泊动态的大气起源.
评估西藏高原湖泊的水量预算.

主要方法:

通过使用2015-2020年16,801张卫星图像生成每月湖面变化数据集.
通过现场GPS实地调查验证的30米以下的精度.
分析了降水异常及其与湖面变化的相关性.

主要成果:

观察到前所未有的对比模式:北方的湖面变化减速,南方的变化加快.
确定最近的降水异常是这些对比模式的可能原因.
确定西藏高原湖泊储存了净降水量的很小一部分 (<5%~11%),有助于了解水质预算.

结论:

西藏高原的湖泊可能正在接近一个临界点,原因是迅速,对比的面积变化.
短期的湖区变化是理解年度内和年度间气候变化的关键气候代理.
该研究强调了高频监测对敏感地区气候变化研究的重要性.

关键词:

加速加速的加速深度学习是一种深度学习.现场活动活动活动.湖区湖区湖区湖区夏季扩张的夏季扩张.

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