NSFGEO-NERC: WAVE-induced Transport of Chemically Active Species in the Mesosphere and Lower Thermosphere (WAVECHASM)

这是一个由国家科学基金会地球科学理事会（NSF/GEO）和联合王国国家环境研究理事会（NERC）通过NSF/GEO-NERC牵头机构协议共同资助的项目。该协议允许美国/英国提交一份联合提案，并由研究者拥有最大预算比例的机构进行同行评审。在成功联合确定授标后，每个机构为与本机构调查员和工作组成部分有关的预算和调查员提供资金。WAVECHASM项目旨在通过将高层大气的小尺度过程纳入NSF国家大气研究中心的大尺度模型来改进大气模型。这一跨学科项目将近地空间环境物理学和大气化学结合在一起，大气中的波致传输对一系列广泛的研究问题都很重要，包括大气环流建模、大气化学建模和热平衡计算。然而，计算成本的限制意味着它迄今为止还没有实际的小尺度波输运效应直接在全球模式。WAVECHASM将通过提高我们模拟中间层和低热层（MLT，70-120公里）组成结构的能力，增进对波输运过程及其与化学的关系的理解。目标是量化理论上的成分传输，开发一个适合纳入现有的全球大气化学模型的波传输参数化方案，并使用升级后的模型来表征波传输对关键MLT成分形态的影响。美国的参与者负责制定波浪参数化方案，并使用来自地球仪的众多（无资金）项目合作伙伴收集的大量观测数据来测试其有效性。联合王国的参与者负责将参数化方案纳入NCAR全大气社区气候模式，并根据WACCM的高分辨率区域改进版本评估其性能。美国和英国的参与者都使用升级后的模型来量化波浪和潮汐引起的主要MLT物质（Na，Fe，OX，HOX，考克斯和NOX）的垂直通量，并确定它们与对流层和平流层波源的关系。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This is a project that is jointly funded by the National Science Foundation’s Directorate of Geosciences (NSF/GEO) and the National Environment Research Council (NERC) of the United Kingdom (UK) via the NSF/GEO-NERC Lead Agency Agreement. This Agreement allows a single joint US/UK proposal to be submitted and peer-reviewed by the Agency whose investigator has the largest proportion of the budget. Upon successful joint determination of an award, each Agency funds the proportion of the budget and the investigators associated with its own investigators and component of the work. The WAVECHASM project seeks to improve models of the atmosphere by including small scale processes from the upper atmosphere into a large scale model housed at the NSF's National Center for Atmospheric Research. This cross disciplinary project brings together the physics of the near Earth space environment and atmospheric chemistry.Wave-induced transport in the atmosphere is important to a wide range of research problems, including general circulation modelling, atmospheric chemistry modelling and thermal balance calculations. However, computational cost constraints mean that it has not so far been practical to include small-scale wave transport effects directly in global models. WAVECHASM will enhance understanding of wave transport processes and their relationships to chemistry by improving our ability to model the constituent structure of the mesosphere and lower thermosphere (MLT, 70-120 km). The objectives are to quantify constituent transport theoretically, to develop a wave-transport parameterization scheme suitable for incorporating into existing global atmospheric chemistry models, and to use the upgraded models to characterize wave-transport effects on the morphologies of key MLT constituents. The US participants are responsible for developing the wave parameterization scheme and testing its efficacy using extensive observational data collected by numerous (unfunded) project partners from around the globe. The UK participants are responsible for incorporating the parameterization scheme in the NCAR Whole Atmosphere Community Climate Model and for assessing its performance against a high-resolution regionally refined version of WACCM. Both the US and UK participants with then use the upgraded models to quantify the wave- and turbulence-induced vertical fluxes of key MLT species (Na, Fe, OX, HOX, COX and NOX) and determine their relationships to wave sources in the troposphere and stratosphere.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.