权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Investigation of the radiative energy balance of Venus based on improved models of the middle and lower atmosphere

基于改进的中低层大气模型的金星辐射能量平衡研究

基本信息

批准号：
225438391
负责人：
Dr. Rainer Haus
金额：
--
依托单位：
Institut für Planetenforschung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/225438391?language=en
关键词：
Investigation radiative energy balance Venus

项目摘要

The research proposal aims to investigate the radiative energy balance of Venus in the middle and lower atmosphere (90-0 km). Novel retrieval techniques will be applied for this purpose that facilitate a derivation of improved models of atmospheric temperature fields, cloud features, and trace gas distributions.The proposed work is based on analyses of radiation measurement data that were recorded by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) aboard ESA’s Venus-Express mission in the near-infrared spectral region. As supplement to the database for the thermal infrared region, it is also intended to use Fourier spectrometer measurements aboard the Russian Venera-15 experiment (1983). The applicant is/was involved in the two experiments as Co-Investigator and has unrestricted data access. The methods for derivation of improved atmospheric models will simultaneously utilize various transparency windows on the nightside of the planet (multi-window use) that yield information on atmospheric features in the altitude range 0-90 km. New and in preparatory work developed and verified radiative transfer models will be employed for this purpose that consider the extreme environmental conditions of the dense lower atmosphere and that clearly differ from conventional models. Novel retrieval methods, which are based hereupon and which have been already successfully verified to some extent, will allow for the simultaneous use of a large number of spectra (multi-spectrum use). They are able to separate influences of the atmospheric parameters temperature, cloud, and trace gas distribution on measured spectra, and to quantify the parameters themselves. Beyond that, these techniques shall facilitate for the first time the determination of wavelength-dependent atmospheric continuum absorption, the strong influence of which on the atmospheric transparency windows was not sufficiently considered by currently available models. The accuracy of retrieved atmospheric parameters can be substantially enhanced thereby. This Venus research project combines the utilization of the best ever available remote sensing data archive with the adaptation of novel sophisticated analysis methods to retrieve atmospheric state parameters. Derived multi-dimensional parameter maps will be subsequently used to calculate location and time-dependent net radiation fluxes in the middle and lower atmosphere and to study impacts of possible parameter variations. Altitude-dependent heating and cooling rates resulting from the vertical divergence of net fluxes will provide a new data base for the exploration of dynamical processes and global circulation mechanisms.

该研究计划旨在研究金星中低层大气（90-0公里）的辐射能量平衡。为此将应用新颖的检索技术，以促进改进大气温度场、云特征和微量气体分布模型的推导。拟议的工作基于对欧空局金星快车任务中近红外光谱区域的可见光和红外热成像光谱仪（VIRTIS）记录的辐射测量数据的分析。作为热红外区域数据库的补充，它还打算使用俄罗斯 Venera-15 实验（1983）上的傅立叶光谱仪测量。申请人作为联合研究员参与了这两个实验，并且拥有不受限制的数据访问权限。改进的大气模型的推导方法将同时利用地球夜间的各种透明窗口（多窗口使用），产生 0-90 公里高度范围内大气特征的信息。为此目的，将采用新的和正在准备工作中开发和验证的辐射传输模型，该模型考虑了稠密低层大气的极端环境条件，并且与传统模型明显不同。以此为基础并已在一定程度上得到成功验证的新颖检索方法将允许同时使用大量光谱（多光谱使用）。他们能够分离大气参数、温度、云和痕量气体分布对测量光谱的影响，并量化参数本身。除此之外，这些技术将首次有助于确定与波长相关的大气连续吸收，当前可用的模型尚未充分考虑其对大气透明度窗口的强烈影响。从而可以显着提高反演大气参数的准确性。该金星研究项目结合了利用迄今为止最好的遥感数据档案和采用新颖的复杂分析方法来检索大气状态参数。随后将使用导出的多维参数图来计算中层和低层大气中位置和时间相关的净辐射通量，并研究可能的参数变化的影响。由净通量垂直发散产生的与海拔相关的加热和冷却速率将为探索动力学过程和全球环流机制提供新的数据库。