Observing System Simulation Experiments Exploring Potential Spaceborne Deployment Options for a Differential Absorption Radar Measuring Marine Surface Pressures

IF 2.9 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Earth and Space Science Pub Date : 2024-10-25 DOI:10.1029/2024EA003791

N. C. Privé, Matthew McLinden, Bing Lin, G. M. Heymsfield, Xia Cai, Steven Harrah

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Abstract

A new technology for remote measurements of marine surface pressure has been proposed, employing a V-band differential absorption radar and a radiometric temperature sounder to calculate the total column atmospheric mass. Observing System Simulation Experiments (OSSEs) are performed to evaluate the potential impact of Spaceborne Marine Surface Pressure (SMSP) on Numerical Weather Prediction. These experiments build on prior efforts (Privé, McLinden, et al., 2023, https://doi.org/10.16993/tellusa.3254), but with an updated version of the OSSE framework and with more sophisticated simulation of the SMSP observations and a longer experiment period. Several different instrument configurations are compared, including both scanning and non-scanning orbits. SMSP impacts are calculated for analysis quality and forecast skill, and a forecast sensitivity observation impact tool is employed to place SMSP observations in context with the global observing network. The effects of rain contamination on observation quality are explored. Different magnitudes of simulated SMSP observation error are tested in the context of data assimilation to show the range of potential behaviors. Overall, SMSP observations are found to be most beneficial in the southern hemisphere extratropics, with statistically significant forecast improvements for the first 72 hr of the forecast. A constellation of four non-scanning SMSP satellites is found to outperform a single scanning instrument with a 250 km wide swath.

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观测系统模拟实验探索测量海洋表面压力的差分吸收雷达的潜在星载部署方案

提出了一种遥测海洋表面气压的新技术，利用 V 波段差分吸收雷达和辐射测温仪来计算大气柱的总质量。进行了观测系统模拟实验（OSSE），以评估空间海洋表面气压（SMSP）对数值天气预报的潜在影响。这些实验以先前的工作为基础（Privé、McLinden 等人，2023 年，https://doi.org/10.16993/tellusa.3254），但采用了更新版的 OSSE 框架，对 SMSP 观测进行了更复杂的模拟，实验周期也更长。比较了几种不同的仪器配置，包括扫描和非扫描轨道。计算了SMSP对分析质量和预报技能的影响，并采用了预报敏感性观测影响工具，将SMSP观测与全球观测网络结合起来。探讨了雨水污染对观测质量的影响。在数据同化的背景下，测试了模拟 SMSP 观测误差的不同幅度，以显示潜在的行为范围。总体而言，SMSP 观测对南半球外热带地区最为有利，在预报的前 72 小时内对预报有显著的统计学改进。研究发现，由四颗非扫描 SMSP 卫星组成的卫星群优于 250 千米宽扫描带的单一扫描仪器。

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来源期刊

Earth and Space Science Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

5.50

自引率

3.20%

发文量

285

审稿时长

19 weeks

期刊介绍： Marking AGU’s second new open access journal in the last 12 months, Earth and Space Science is the only journal that reflects the expansive range of science represented by AGU’s 62,000 members, including all of the Earth, planetary, and space sciences, and related fields in environmental science, geoengineering, space engineering, and biogeochemistry.