Consideration of Lifetimes of Tracers for the Determination of Stratospheric Age Spectra and the Brewer Dobson Circulation (CoLiBri)

用于确定平流层年龄谱和布鲁尔多布森环流 (CoLiBri) 的示踪剂寿命的考虑

• 批准号: 232327523
• 负责人: Professor Dr. Thomas von Clarmann (†)
• 金额: --
• 依托单位: IMK - Atmosphärische Spurengase und Fernerkundung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/232327523?language=en
• 关键词: Consideration; Lifetimes; Tracers; Determination; Stratospheric

The goal of this project is to explore the use of long-lived trace species to constrain stratospheric circulation under consideration of tracer lifetimes. From Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) measurements global distributions of SF6, CFC-11, CFC-12, HCFC-22, CH4, N2O and H2O are available. The inference of age of stratospheric air from SF6 distributions is straight forward since there are no stratospheric sinks, and has already been performed to assess the intensity of the Brewer Dobson circulation. The use of the other tracers for this purpose is more challenging, since their specific lifetimes have to be considered. Since the decomposition of these species is altitude and latitude-dependent, their effective lifetimes depend in turn on the velocity of the Brewer Dobson circulation. This project shall tackle this problem in the following steps: (a) An altitude- and latitude-dependent parametrization of tracer lifetimes will be developed, in order to make these gases usable as age-tracers; (b) from latitude- and altitude dependent age of air distributions derived from MIPAS SF6 measurements, circulation and mixing patterns will be inferred; (c) on the basis of these circulation and mixing patterns and local lifetime estimates, tracer distributions will be deduced and compared to the tracer distributions measured by MIPAS; (d) discrepancies between calculated and measured tracer distributions will be analyzed to identify inappropriate assumptions on mixing and transport processes.

该项目的目标是在考虑到示踪剂寿命的情况下，探索使用寿命长的示踪物质来限制平流层环流。通过迈克尔逊被动大气探测干涉仪（MIPAS）测量，可获得SF6、CFC-11、CFC-12、HCFC-22、CH 4、N2 O和H2O的全球分布。从SF6分布推断平流层空气的年龄是直接的，因为没有平流层汇，并已执行评估布鲁尔多布森环流的强度。为此目的使用其他示踪剂更具挑战性，因为必须考虑它们的特定寿命。由于这些物种的分解取决于海拔和纬度，它们的有效寿命又取决于布鲁尔多布森环流的速度。该项目将采取下列步骤处理这一问题：（a）将制定一种取决于高度和纬度的示踪剂寿命参数，以便使这些气体可用作年龄示踪剂;（B）将从MIPAS SF6测量得出的取决于纬度和高度的空气分布年龄推断出环流和混合模式;（c）根据这些环流和混合模式以及当地寿命估计，将推断出示踪剂分布，并与MIPAS测量的示踪剂分布进行比较;（d）将分析计算的示踪剂分布与测量的示踪剂分布之间的差异，以查明关于混合和输送过程的不适当假设。

项目成果

Reassessment of MIPAS age of air trends and variability

• DOI: 10.5194/acp-15-13161-2015
• 发表时间: 2015-11
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: F. Haenel;G. Stiller;T. Clarmann;B. Funke;E. Eckert;N. Glatthor;U. Grabowski;S. Kellmann;M. Kiefer;A. Linden;T. Reddmann

Direct inversion of circulation and mixing from tracer measurements – Part 1: Method

根据示踪剂测量直接反演循环和混合 â 第 1 部分：方法

• DOI: 10.5194/acp-16-14563-2016
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: T. von Clarmann;U. Grabowski
• 通讯作者: U. Grabowski

MIPAS IMK/IAA CFC-11 (CCl3F) and CFC-12 (CCl2F2) Measurements: Accuracy, Precision and Long-Term Stability

MIPAS IMK/IAA CFC-11 (CCl3F) 和 CFC-12 (CCl2F2) 测量：准确度、精密度和长期稳定性

• DOI: 10.5194/amt-9-3355-2016
• 发表时间: 2016
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: E. Eckert;A. Laeng;S. Lossow;S. Kellmann;G. Stiller;T. von Clarmann;N.Glatthor;M. Höpfner;M. Kiefer;H.Oelhaf;J.Orphal;B. Funke;U. Grabowski;F. Haenel;A. Linden;G. Wetzel;W.Woiwode;P. F. Bernath;G. S.Dutton;J.W. Elkins;A. Engel;J.C. Gi
• 通讯作者: J.C. Gi

Trend analysis of the 20-year time series of stratospheric ozone profiles observed by the GROMOS microwave radiometer at Bern

伯尔尼 GROMOS 微波辐射计观测的平流层臭氧剖面 20 年时间序列趋势分析

• DOI: 10.5194/acp-15-10999-2015
• 发表时间: 2015
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: L. Moreira;K. Hocke;E. Eckert;T. von Clarmann;N. Kämpfer
• 通讯作者: N. Kämpfer

Validation of MIPAS IMK/IAA methane profiles

• DOI: 10.5194/amt-8-5251-2015
• 发表时间: 2015-12
• 期刊: Atmospheric Measurement Techniques
• 影响因子: 3.8
• 作者: A. Laeng;J. Plieninger;T. Clarmann;U. Grabowski;G. Stiller;E. Eckert;N. Glatthor;F. Haenel;S. Kellmann;M. Kiefer;A. Linden;S. Lossow;L. Deaver;A. Engel;M. Hervig;I. Levin;M. McHugh;S. Noel;G. Toon;K. Walker