Harmonized Emissions Component (HEMCO) 3.0 as a versatile emissions component for atmospheric models: application in the GEOS-Chem, NASA GEOS, WRF-GC, CESM2, NOAA GEFS-Aerosol, and NOAA UFS models
Harmonized Emissions Component (HEMCO) 3.0 as a versatile emissions component for atmospheric models: application in the GEOS-Chem, NASA GEOS, WRF-GC, CESM2, NOAA GEFS-Aerosol, and NOAA UFS models
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DOI：
10.5194/gmd-14-5487-2021
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发表时间：
2021-05
影响因子：
5.1
通讯作者：
Haipeng Lin;D. Jacob;Elizabeth W. Lundgren;M. Sulprizio;C. Keller;T. Fritz;S. Eastham;L. Emmons;P. Campbell;B. Baker;R. Saylor;R. Montuoro
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作者：
Haipeng Lin;D. Jacob;Elizabeth W. Lundgren;M. Sulprizio;C. Keller;T. Fritz;S. Eastham;L. Emmons;P. Campbell;B. Baker;R. Saylor;R. Montuoro
抽象的。排放是大气化学模型的核心组成部分。协调排放组件（HEMCO）是一个软件组件，用于从用户选择的排放清单和算法集合中计算排放量。HEMCO在独立模式下可用时，还为模型提供了一个通用的在线设施，以便在运行时计算排放量。它允许用户通过配置文件重新网格化、联合收割机、覆盖、子集化和缩放来自不同库存的排放，而无需更改模型源代码。配置文件还将排放映射到具有适当单位的模型物种。HEMCO符合地球系统建模框架（ESMF）的跨模型可移植性。我们在这里介绍了新版本HEMCO 3.0，其具有改进的三层架构，以促进在任何大气模型中的实施，并改进了以任何模型分辨率（包括多尺度和非结构化网格）计算排放的能力。HEMCO 3.0的三层结构包括：（1）数据输入层，读取配置文件并访问HEMCO排放清单库和其他环境数据;（2）HEMCO核心，在用户选择的HEMCO网格上计算排放量;以及（3）重新网格化的模型界面层（如果需要的话）并且将数据提供给大气模型，并且还将模型数据提供给HEMCO核心，用于计算依赖于模型状态的排放（例如来自灰尘、植被等）。HEMCO Core是所有模型中的通用实现，而数据输入层和模型接口层则适用于模型环境。默认版本的数据输入层和模型接口层可以在任何简单的模型架构中直接实现HEMCO，并且可以选择禁用诸如重新网格化等功能，这些功能可能由更复杂架构中的独立耦合器完成。通过用户的贡献，HEMCO排放清单和算法库不断丰富，因此新的清单可以立即在模型之间共享。HEMCO还可以作为模型的通用数据代理，不仅处理排放数据，还处理任何网格化环境数据集的输入数据。我们描述了HEMCO 3.0在以下方面的现有实现：（1）具有共享内存基础设施的GEOS-Chem“经典”化学输运模型，（2）具有分布式内存架构的高性能GEOS-Chem（GCHP）模型，（3）NASA GEOS地球系统模型（GEOS ESM），（4）带有GEOS-Chem的天气研究和预报模型（WRF-GC），（5）共同体地球系统模型第二版（CESM 2），以及（6）NOAA全球环境预报系统-气溶胶（GEFS-Aerosols），以及计划在NOAA统一预报系统（UFS）中实施。在CESM 2模式中实施HEMCO有助于化学和气溶胶多尺度基础设施（MUSICA），提供了一个共同的排放基础设施，以支持不同尺度的大气化学模拟。
Abstract. Emissions are a central component of atmospheric chemistry models. The Harmonized Emissions Component (HEMCO) is a software component for computing emissions from a user-selected ensemble of emission inventories and algorithms. While available in standalone mode, HEMCO also provides a general on-line facility for models to compute emissions at runtime. It allows users to re-grid, combine, overwrite, subset, and scale emissions from different inventories through a configuration file and with no change to the model source code. The configuration file also maps emissions to model species with appropriate units. HEMCO complies with the Earth System Modeling Framework (ESMF) for portability across models. We present here a new version HEMCO 3.0 that features an improved three-layer architecture to facilitate implementation into any atmospheric model, and improved capability for calculating emissions at any model resolution including multiscale and unstructured grids. The three-layer architecture of HEMCO 3.0 includes (1) a Data Input Layer that reads the configuration file and accesses the HEMCO library of emission inventories and other environmental data; (2) the HEMCO Core that computes emissions on the user-selected HEMCO grid; and (3) the Model Interface Layer that re-grids (if needed) and serves the data to the atmospheric model, and also serves model data to the HEMCO Core for computing emissions dependent on model state (such as from dust, vegetation, etc.). The HEMCO Core is common to the implementation in all models, while the Data Input Layer and the Model Interface Layer are adaptable to the model environment. Default versions of the Data Input Layer and Model Interface Layer enable straightforward implementation of HEMCO in any simple model architecture, and options are available to disable features such as re-gridding that may be done by independent couplers in more complex architectures. The HEMCO library of emission inventories and algorithms is continuously enriched through user contributions, so that new inventories can be immediately shared across models. HEMCO can also serve as a general data broker for models to process input data not only for emissions but for any gridded environmental datasets. We describe existing implementations of HEMCO 3.0 in (1) the GEOS-Chem “Classic” chemical transport model with shared-memory infrastructure, (2) the high-performance GEOS-Chem (GCHP) model with distributed-memory architecture, (3) the NASA GEOS Earth System Model (GEOS ESM), (4) the Weather Research and Forecasting model with GEOS-Chem (WRF-GC), (5) the Community Earth System Model Version 2 (CESM2), and (6) the NOAA Global Ensemble Forecast System – Aerosols (GEFS-Aerosols), and the planned implementation in the NOAA Unified Forecast System (UFS). Implementation of HEMCO in the CESM2 model contributes to the Multi-Scale Infrastructure for Chemistry and Aerosols (MUSICA) by providing a common emissions infrastructure to support different simulations of atmospheric chemistry across scales.