Support for the Radiation-Intercomparison Project as part of the Chemistry Climate Model Validation exercise (CCMVal)

支持辐射比对项目，作为化学气候模型验证活动 (CCMVal) 的一部分

• 批准号: NE/E010164/1
• 负责人: Piers Forster
• 金额: $ 6.21万
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FE010164%2F1
• 关键词: Support; Radiation; Intercomparison; Project; part

Uncertainties in radiation schemes are a large source of error in climate studies. The PI is leading an international effort to validate the radiative transfer models used in Chemistry Climate Models (CCMs). This project is part of the SPARC CCM Validation (CCMVal) exercise. SPARC/WCRP recognise that CCMs require extensive validation and are providing the framework but not the funding to carry out this project. Phase I of this project is nearing completion and this NERC Small Grant proposal is to support Phases II and III of the project. Phase I. For this the PI collected and/or created (by stripping radiation subroutines out of main programs) offline versions of five GCM and CCM radiative transfer codes. Single profile clear sky comparisons of radiative heating rates and forcings were made and these were compared to those calculated with a sophisticated radiation model). This approach required substantial coding and debugging to get all radiation schemes performing on a single computer platform. Phase II will widen the comparison to the international CCM community and involve many more radiation schemes (12+), compared to the 5 analysed in Phase I. Groups themselves will need to perform the requested offline calculations. Heating rates, radiative temperature changes and radiative relaxation times will be compared in offline radiative transfer schemes for multiple clear-sky atmospheric profiles, simulating different months and different times of day. To explain the differences found between schemes it is also important to document the various parameterisations and approximations used in each code. Therefore it is necessary for the PI to visit modelling groups for a few days, impress on them the need for action and then to enlist willing scientists to help produce and/or document an offline radiation code. Following on from this contact groups will be required to submit calculations in a timely fashion and help with interpretation of the results. A suite of requested documentation and calculations has already been designed. Discovering causes of radiation scheme error will be an iterative process with the modelling groups performing additional calculations when requested. An independent set of reference calculations are also being performed by Dr Robert Portmann (NOAA-Bolder). Phase III will involve the CCM groups themselves with our input, employing the results from Phase II to improve their radiative transfer schemes and look at how improved schemes affect CCM integrations.

辐射方案的不确定性是气候研究中的一个很大的误差来源。PI正在领导一项国际努力，以验证化学气候模型（CCM）中使用的辐射传输模型。该项目是CCMVal验证（CCMVal）练习的一部分。粮农组织/世界气候研究方案认识到，国家协调机制需要广泛的验证，并提供了框架，但没有提供执行这一项目的资金。该项目的第一阶段即将完成，NERC小额赠款提案将支持该项目的第二和第三阶段。一阶段为此，PI收集和/或创建（通过剥离主程序的辐射子程序）五个GCM和CCM辐射传输代码的离线版本。进行了辐射加热率和强迫的单一廓线晴空比较，并将其与用复杂的辐射模式计算的结果进行了比较。这种方法需要大量的编码和调试，以使所有的辐射方案在一个单一的计算机平台上执行。第二阶段将扩大与国际CCM社区的比较，与第一阶段分析的5个辐射计划相比，涉及更多的辐射计划（12个以上）。组本身将需要执行所请求的离线计算。将在离线辐射传输方案中比较加热率、辐射温度变化和辐射弛豫时间，模拟不同月份和一天中不同时间的多个晴空大气廓线。为了解释方案之间的差异，还必须记录每个代码中使用的各种参数化和近似值。因此，PI有必要访问模型组几天，向他们强调采取行动的必要性，然后招募愿意帮助制作和/或记录离线辐射代码的科学家。此后，将要求各接触小组及时提交计算结果，并帮助解释结果。已经设计了一套所需的文件和计算。发现辐射方案错误的原因将是一个迭代过程，建模小组将根据要求进行额外的计算。Robert Portmann博士（NOAA-Bolder）也正在进行一组独立的参考计算。第三阶段将涉及CCM组本身与我们的投入，利用第二阶段的结果，以改善他们的辐射传输计划，并看看如何改善计划影响CCM集成。

项目成果

An all-sky radiative transfer method to predict optimal tilt and azimuth angle of a solar collector

• DOI: 10.1016/j.solener.2015.11.013
• 发表时间: 2016
• 期刊: Solar Energy
• 影响因子: 6.7
• 作者: Christopher J. Smith;P. Forster;R. Crook

PARC CCMVal (2010), SPARC Report on the Evaluation of Chemistry-Climate Models, V. Eyring, T. G. Shepherd, D. W. Waugh (Eds.), SPARC Report No. 5, WCRP-132, WMO/TD-No. 1526, http://www.atmosp.physics.utoronto.ca/SPARC

PARC CCMVal (2010)，SPARC 化学气候模型评估报告，V. Eyring、T. G. Shepherd、D. W. Waugh（编辑）、SPARC 第 5 号报告、WCRP-132、WMO/TD-No.

• 发表时间: 2010
• 作者: Fomichev V

Fouth Assessment report on Climate Change

第四次气候变化评估报告

• 发表时间: 2007
• 作者: Forster, P. M. Et Al.

Intercomparison of radiative forcing calculations of stratospheric water vapour and contrails Intercomparison of radiative forcing calculations of stratospheric water vapour and contrails

平流层水汽和凝结尾辐射强迫计算的对比 平流层水汽和凝结尾辐射强迫计算的对比

• DOI: 10.1127/0941-2948/2009/0411
• 发表时间: 2009
• 期刊: Meteorologische Zeitschrift
• 影响因子: 1.2
• 作者: Myhre G

The annual cycle in lower stratospheric temperatures revisited

• DOI: 10.5194/acp-11-3701-2011
• 发表时间: 2010-11
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: S. Fueglistaler;P. Haynes;P. Forster