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Lekhraj Saini¹, Saurabh Das², Nuncio Murukesh^1,3

¹Department of Astronomy, Astrophysics and Space Engineering, Indian Institute of Technology Indore, Indore, Madhya Pradesh, 453552, India.

Scientific reports

|January 24, 2025

概括

北极的变暖正在将降水从雪转变为雨. 在海拔2-3公里的温暖,潮湿的南方空气质量是这些相变的关键驱动因素,影响北极海冰和气候.

科学领域:

大气科学大气科学
北极气候学北极气候学
气象学天气学

背景情况:

北极降水对海冰质量平衡至关重要,并对全球气候产生影响.
北极的变暖趋势表明,从降雪转向增加的液体和混合降水.
了解降水阶段变化对于准确的北极气候预测至关重要.

研究的目的:

为了研究北极降水阶段过渡的微物理特征.
为了确定大气条件驱动雪,雨和灰尘之间的转移.
为了提高未来北极降水趋势预测的准确性.

主要方法:

利用微雨雷达 (MRR) 在斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯瓦尔巴德斯
使用地面微波辐射仪 (MWR) 进行垂直大气概况分析.
分析了不同压力级别的大气条件和风向模式的ERA5再分析数据.

主要成果:

南方温暖潮湿的空气质量显著影响降水阶段和强度.
在海拔约2-3公里的温暖,潮湿的风会促进雪融,导致降雨.
通过ERA5数据识别的上风运动与形形成有关.

结论:

温暖,潮湿的空气向导是北极降水阶段变化的主要驱动因素.
特定的大气条件决定了不同降水类型之间的过渡.
这项研究为改善北极降水预测提供了关键的见解.

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