A Bin and a Bulk Microphysics Scheme Can Be More Alike Than Two Bin Schemes
A Bin and a Bulk Microphysics Scheme Can Be More Alike Than Two Bin Schemes
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一个 Bin 和一个体微物理方案可能比两个 Bin 方案更相似
DOI：
10.1029/2022ms003303
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发表时间：
2023
影响因子：
6.8
通讯作者：
Igel, Adele L.
中科院分区：
文献类型：
--
作者：
Hu, Arthur Z.;Igel, Adele L.
Bin和bulk方案是云微物理过程参数化的两种主要方法。本研究试图揭示它们的结构差异（尺寸分辨与力矩分辨）如何在云和降水特性方面表现出来。我们使用一种批量方案，即任意力矩预测器（AMP），它使用与bin方案相同的过程参数化，但像批量方案一样只预测大小分布的力矩。因此，使用AMP的bin方案的模拟和使用AMP本身的模拟之间的差异一定来自它们的结构差异。在一维运动学模拟中，发现AMP（散装）和bin方案之间的总体差异很小。全微物理AMP和bin模拟的平均液态水路径相似（平均百分比差异<4%），但由于降水开始较慢，AMP模拟的平均降水率明显低于bin方案（- 35%）。还对各个过程进行了测试。AMP几乎完美地代表了缩合，由于成核、蒸发和沉淀，AMP - bin只有很小的差异。碰撞聚结是AMP - bin发散的最大原因。更仔细的观察表明，这种散度主要是自转换的结果，而不是吸积的结果。在完整的微物理模拟中，降低AMP中云和雨类别的直径阈值，将最大的AMP - bin差异降低到约10%，使AMP（通常可能是三矩体方案）和bin之间的结构差异的影响甚至小于两个bin方案之间的参数化差异。
Bin and bulk schemes are the two primary methods to parameterize cloud microphysical processes. This study attempts to reveal how their structural differences (size‐resolved vs. moment‐resolved) manifest in terms of cloud and precipitation properties. We use a bulk scheme, the Arbitrary Moment Predictor (AMP), which uses process parameterizations identical to those in a bin scheme but predicts only moments of the size distribution like a bulk scheme. As such, differences between simulations using AMP's bin scheme and simulations using AMP itself must come from their structural differences. In one‐dimensional kinematic simulations, the overall difference between AMP (bulk) and bin schemes is found to be small. Full‐microphysics AMP and bin simulations have similar mean liquid water path (mean percent difference <4%), but AMP simulates significantly lower mean precipitation rate (−35%) than the bin scheme due to slower precipitation onset. Individual processes are also tested. Condensation is represented almost perfectly with AMP, and only small AMP‐bin differences emerge due to nucleation, evaporation, and sedimentation. Collision‐coalescence is the single biggest reason for AMP‐bin divergence. Closer inspection shows that this divergence is primarily a result of autoconversion and not of accretion. In full microphysics simulations, lowering the diameter threshold separating cloud and rain category in AMP from to reduces the largest AMP‐bin difference to ∼10%, making the effect of structural differences between AMP (and perhaps triple‐moment bulk schemes generally) and bin even smaller than the parameterization differences between the two bin schemes.
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影响因子：
6.8
作者：
Morrison H;van Lier-Walqui M;Fridlind AM;Grabowski WW;Harrington JY;Hoose C;Korolev A;Kumjian MR;Milbrandt JA;Pawlowska H;Posselt DJ;Prat OP;Reimel KJ;Shima SI;van Diedenhoven B;Xue L
通讯作者：
Xue L
雨微物理统计物理体参数化的贝叶斯方法第二部分：理想化马尔可夫链蒙特卡罗实验。
影响因子：
3.1
作者：
M. Lier;H. Morrison;M. Kumjian;K. Reimel;O. Prat;S. Lunderman;M. Morzfeld
通讯作者：
M. Morzfeld
机器学习在暖雨云微物理过程建模中的潜力和局限性
影响因子：
6.8
作者：
Seifert
通讯作者：
Seifert
单独的云和雨类别在参数化碰撞-体微物理方案合并中的局限性
影响因子：
6.8
作者：
Igel, A. L.;Morrison, H.;Santos, S. P.;van Lier‐Walqui, M.
通讯作者：
van Lier‐Walqui, M.
雨微物理统计物理体参数化的贝叶斯方法第一部分：方案描述。
影响因子：
3.1
作者：
H. Morrison;M. Lier;M. Kumjian;O. Prat
通讯作者：
O. Prat