The Ny-Alesund Aerosol Cloud Experiment (NASCENT): Overview and First Results
The Ny-Alesund Aerosol Cloud Experiment (NASCENT): Overview and First Results
复制标题
纽约奥尔松气溶胶云实验 (NASCENT)：概述和初步结果
DOI：
10.1175/bams-d-21-0034.1
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发表时间：
2022
影响因子：
8
通讯作者：
Adachi K. et al
中科院分区：
文献类型：
--
作者：
Pasquier J. T.;David R. O.;Freitas G.;Gierens R.;Gramlich Y.;Haslett S.;Li G.;Sch?fer B.;Siegel K.;Wieder J.;Adachi K. et al
北极的变暖速度是全球平均速度的两倍多。这种变暖受到云的影响，云调节太阳和陆地的辐射通量，从而决定地表能量收支。然而，北极的云、气溶胶和辐射通量之间的相互作用仍然知之甚少。为了解决这些不确定性，2019年9月至2020年8月在斯瓦尔巴群岛的Ny-Ålesund进行了Ny-Ålesund气溶胶云实验（NASCENT）研究。该活动的主要目标是阐明北极气溶胶的生命周期，并确定它们全年如何调节云的特性。实地和遥感观测是在海平面的地面、山顶站和系绳气球系统上进行的。介绍了新生年期间遇到的气象和主要气溶胶季节性的概述，然后介绍了第一个科学亮点。特别是，我们提出了新的发现，在气溶胶的物理化学和分子性质。此外，还讨论了云滴活化和冰晶成核在混合相云的形成和持续以及二次冰过程的发生中的作用，并与区域天气研究与预报模式中云过程的表现进行了比较。本文总结了即将在新生出版物中要解决的研究问题。
The Arctic is warming at more than twice the rate of the global average. This warming is influenced by clouds, which modulate the solar and terrestrial radiative fluxes and, thus, determine the surface energy budget. However, the interactions among clouds, aerosols, and radiative fluxes in the Arctic are still poorly understood. To address these uncertainties, the Ny-Ålesund Aerosol Cloud Experiment (NASCENT) study was conducted from September 2019 to August 2020 in Ny-Ålesund, Svalbard. The campaign’s primary goal was to elucidate the life cycle of aerosols in the Arctic and to determine how they modulate cloud properties throughout the year. In situ and remote sensing observations were taken on the ground at sea level, at a mountaintop station, and with a tethered balloon system. An overview of the meteorological and the main aerosol seasonality encountered during the NASCENT year is introduced, followed by a presentation of first scientific highlights. In particular, we present new findings on aerosol physicochemical and molecular properties. Further, the role of cloud droplet activation and ice crystal nucleation in the formation and persistence of mixed-phase clouds, and the occurrence of secondary ice processes, are discussed and compared to the representation of cloud processes within the regional Weather Research and Forecasting Model. The paper concludes with research questions that are to be addressed in upcoming NASCENT publications.