MOisture Transport pathways and Isotopologues in water Vapour (MOTIV)

水蒸气中的水分传输途径和同位素体 (MOTIV)

• 批准号: 290612604
• 负责人: Dr. Matthias Schneider
• 金额: --
• 依托单位: Institut für Atmosphäre und Klima
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/290612604?language=en
• 关键词: MOisture; Transport; pathways; Isotopologues; water

The coupling between atmospheric water and circulation via radiative effects, latent heat release and cloud feedback mechanisms is a main limitation in our current understanding of the climate system. A comparison of different models or model setups with different resolutions and parameterisations can give valuable insight into the underlying problems, but for critical model tests observational data are required. In this context tropospheric water vapour isotopologues can make a unique contribution. Their ratios provide information about the source conditions of atmospheric water and the involved transformation processes in the atmosphere and in clouds. There has recently been large progress in modelling and observing these ratios, such that a combined analysis is now feasible at high spatial and temporal resolution and on a global scale. The aim of this project is to establish tropospheric water vapour isotopologues as an observational tool for testing the model representation of atmospheric moisture pathways, thereby contributing to the aforementioned key challenges in climate research. To achieve statistical robustness, we will generate an unprecedented amount of free tropospheric {H2O, deltaD}-pairs (deltaD is the standardised ratio between HD16O and H216O). For the first time a validated observational dataset will be available that covers large areas, long time periods and include morning and evening measurements. At the same time, a high-resolution meteorological model with isotopologue representation will be used for analyzing moisture sources and pathways and their associated isotopologue signals. This combined observational-modeling approach will provide unique opportunities for model evaluation and for advancing the understanding of the involved processes. The potential of the isotopologues will be demonstrated in three different climatologically interesting regions. In Europe our approach will provide valuable insight into the key relationship between moisture sources and isotopologue signals in highly variable weather conditions. Over the subtropical North Atlantic the isotopologues will be used for tracing mixing between the marine boundary layer and the free troposphere, whose discrepant treatment in models is thought to be one important reason for a large cloud feedback uncertainty in climate models. Over West Africa the isotopologues serve to evaluate the model representation of the West African monsoon, particularly the associated horizontal moisture transport, terrestrial moisture recycling and the diurnal variations related to vertical mixing. Of particular interest will be the role of organised convection in influencing the monsoon circulation and the associated water pathways. Together these results will help to identify and better understand deficits in existing weather and climate models and provide a new framework to guide future model improvement.

大气水和环流之间通过辐射效应、潜热释放和云反馈机制的耦合是我们目前对气候系统理解的一个主要局限。对具有不同分辨率和参数的不同模型或模型设置进行比较，可以对潜在问题提供有价值的见解，但对于关键的模型测试，需要观测数据。在这方面，对流层水蒸气同位素可以作出独特的贡献。它们的比率提供了有关大气水的来源条件以及大气和云中所涉及的转化过程的信息。最近在模拟和观察这些比率方面取得了很大进展，因此现在在高空间和时间分辨率以及全球范围内进行综合分析是可行的。该项目的目的是建立对流层水蒸气同位素谱，作为检验大气水汽路径的模型表示的观测工具，从而有助于气候研究中的上述关键挑战。为了实现统计的稳健性，我们将产生前所未有的数量的自由对流层{H2O，DeltaD}对(DeltaD是HD16O和H216O之间的标准化比率)。将首次提供一个有效的观测数据集，覆盖大范围、长时间段，并包括早晚测量。同时，将使用一个具有同位素表示的高分辨率气象模式来分析水汽来源和路径及其相关的同位素信号。这种观察-建模相结合的方法将为模型评估和促进对所涉过程的理解提供独特的机会。同位素的潜力将在三个不同的气候学感兴趣的地区得到展示。在欧洲，我们的方法将对高度多变的天气条件下水分来源和同位素信号之间的关键关系提供有价值的见解。在副热带北大西洋，同位素将被用来追踪海洋边界层和自由对流层之间的混合，模式中不一致的处理被认为是气候模式中云反馈不确定性很大的一个重要原因。在西非，同位素用于评估西非季风的模式代表，特别是与之相关的水平水汽输送、陆地水汽循环和与垂直混合有关的日变化。特别令人感兴趣的是有组织的对流在影响季风环流和相关的水路方面的作用。综合起来，这些结果将有助于识别和更好地理解现有天气和气候模式中的缺陷，并提供一个新的框架来指导未来的模式改进。

项目成果

Evaluation of MUSICA IASI tropospheric water vapour profiles using theoretical error assessments and comparisons to GRUAN Vaisala RS92 measurements

• DOI: 10.5194/amt-11-4981-2018
• 发表时间: 2017-10
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: C. Borger;M. Schneider;B. Ertl;F. Hase;O. García;M. Sommer;M. Höpfner;S. Tjemkes;X. Calbet

Potential of Mid‐tropospheric Water Vapor Isotopes to Improve Large‐Scale Circulation and Weather Predictability

对流层中层水蒸气同位素改善大尺度环流和天气预报的潜力

• DOI: 10.1029/2020gl091698
• 发表时间: 2021
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Toride;Yoshimura;Diekmann;Khosrawi;Schneider
• 通讯作者: Schneider

MUSICA MetOp/IASI {H2O;δD} pair retrieval simulations for validating tropospheric moisture pathways in atmospheric models

MUSICA MetOp/IASI {H2O;δD} 对反演模拟，用于验证大气模型中的对流层水分路径

• DOI: 10.5194/amt-10-507-2017
• 发表时间: 2017
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: Schneider;Borger;Wiegele;García;Sepúlveda;Werner
• 通讯作者: Werner

From climatological to small-scale applications: simulating water isotopologues with ICON-ART-Iso (version 2.3)

从气候学到小规模应用：使用 ICON-ART-Iso 模拟水同位素体（版本 2 3）

• DOI: 10.5194/gmd-11-5113-2018
• 发表时间: 2018
• 期刊: Geoscientific Model Development
• 影响因子: 5.1
• 作者: Eckstein;Ruhnke;Christner;Diekmann;Dyroff;Reinert;Rieger;Schneider;Schröter;Braesicke
• 通讯作者: Braesicke