Sustained decrease in inland East Antarctic surface mass balance between 2005 and 2020

D. Wang

doi:10.1038/s41561-025-01699-z

2025-06-11

PRE

Michiel van den Broeke

史

史贵涛 (Guitao Shi) *

DOI：10.1038/s41561-025-01699-z

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准确观测表面质量平衡对于评估南极冰盖质量平衡及其与气候动态的联系至关重要。研究区域表面质量平衡变化因现场观测有限以及雪坑和冰芯测量易受局部扰动影响而具有挑战性。卫星数据和短期局部测量表明，近几十年来东南极冰盖的表面质量平衡没有显著变化或可能有所增加，但这些发现缺乏大尺度验证。本研究利用质量平衡标杆观测数据，显示在2005—2020年期间，中山站至南极冰盖顶点（Dome A）的内陆剖面存在显著的表面质量平衡负趋势。15年内陆段的平均表面质量平衡趋势为−2.01±0.37 kg m−2 yr–2，表明减少了35.5%。这一减少可能与平流层增强的纬向风和南印度洋加深低压系统的增强有关。前者削弱了向南极的经向空气输送，而后者加强了研究区的离岸风，减少了向岸水汽输送。这些发现可用于评估和改进区域气候模型，并细化当代南极质量平衡趋势的估算。东南极内陆的表面质量平衡测量表明，2005—2020年期间表面质量平衡呈负趋势，可能与增强的纬向风有关。

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Nature Geoscience

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Polar Research Institute of China

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School of Geographic Sciences and State Key Laboratory of Estuarine and Coastal Research

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Institute of Tibetan Plateau and Polar Regions Meteorology

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Institute of Atmospheric Physics

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