Understanding Rapid Changes in Phase Partitioning between Cloud Liquid and Ice in Stratiform Mixed-Phase Clouds: An Arctic Case Study

Understanding Rapid Changes in Phase Partitioning between Cloud Liquid and Ice in Stratiform Mixed-Phase Clouds: An Arctic Case Study
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了解层状混合相云中云液和冰之间相分配的快速变化:北极案例研究

DOI:
10.1175/mwr-d-16-0155.1
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发表时间:
2016
影响因子:
3.2
通讯作者:
A. Protat
A. Protat
中科院分区:
地球科学2区
文献类型:
--
作者:
Kalesse;G. de Boer;A. Solomon;M. Ahlgrimm;D. Zhang;M. Shupe;E. Luke;A. Protat

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了解混合相云的相变是非常重要的,因为水凝物相控制云的寿命和辐射效应。在高纬度地区,这些云的辐射效应对地表能量收支有着至关重要的影响,从而对冰盖的演变也有着至关重要的影响。对于春季低级别混合相层状云的情况下,从巴罗,阿拉斯加,仪器和检索方法的独特组合相结合的多个建模的角度来确定控制云相分区的关键过程。被认为是当地的云规模与大规模的过程的相互作用。相分配的快速变化被发现是由几个主要因素引起的。主要影响是具有不同气溶胶浓度和湿度的不同气团的大尺度平流、云尺度过程(例如热力学耦合状态的变化)以及影响冰粒停留时间的局部尺度动力学。其他因素,如卷云的辐射屏蔽和太阳周期的影响,被发现只在特定的案例研究(2013年3月11日至12日)中发挥次要作用。为了更好地了解云相变,需要观测关键的气溶胶参数,如云凝结核和冰核浓度的廓线。
Understanding phase transitions in mixed-phase clouds is of great importance because the hydrometeor phase controls the lifetime and radiative effects of clouds. In high latitudes, these cloud radiative effects have a crucial impact on the surface energy budget and thus on the evolution of the ice cover. For a springtime low-level mixed-phase stratiform cloud case from Barrow, Alaska, a unique combination of instruments and retrieval methods is combined with multiple modeling perspectives to determine key processes that control cloud phase partitioning. The interplay of local cloud-scale versus large-scale processes is considered. Rapid changes in phase partitioning were found to be caused by several main factors. Major influences were the large-scale advection of different air masses with different aerosol concentrations and humidity content, cloud-scale processes such as a change in the thermodynamical coupling state, and local-scale dynamics influencing the residence time of ice particles. Other factors such as radiative shielding by a cirrus and the influence of the solar cycle were found to only play a minor role for the specific case study (11–12 March 2013). For an even better understanding of cloud phase transitions, observations of key aerosol parameters such as profiles of cloud condensation nucleus and ice nucleus concentration are desirable.
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发表时间: 2007
影响因子: 2.9
作者:
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通讯作者: R. Przybylak
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发表时间: 2005-07
影响因子: 2.2
作者:
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DOI: 10.5194/acp-13-9379-2013
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影响因子: 6.3
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DOI: --
发表时间: 2006
期刊:
影响因子: --
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DOI: --
发表时间: 2016
期刊:
影响因子: --
作者:
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