Comparison of temperature, pressure and specific humidity derived from Sentinel-6 with ERA5 and radiosonde

IF 2.8 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2024-09-04 DOI:10.1016/j.asr.2024.09.003

Huizhong Zhu, Guangsheng Liu, Xiang Gao, Shuaimin Wang, Chunhua Jiang

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引用次数: 0

Abstract

The temperature, pressure and specific humidity data of Sentinel-6 (S6) products are compared with the ECMWF Reanalysis v5 (ERA5) and radio sounding in 2022. The overall STD of temperature, pressure and specific humidity for S6-ERA5 and S6-Radiosonde are 0.74 ℃, 0.45 hPa, 0.3 g/kg, 1.33 ℃, 0.51 hPa, 0.34 g/kg respectively. The study found that the consistency of these three atmospheric parameters between S6 and ERA5 is better than that between S6 and radiosonde. In the aspect of temporal characteristics, the specific humidity STD of S6-ERA5 decrease successively in summer, autumn, spring and winter. In the aspect of spatial characteristics, S6 has better retrieval ability of temperature values in the troposphere, but the maximum negative bias value of temperature between S6 and ERA5 is −1.57 ℃ at 41.7 km. The pressure bias values of S6 and ERA5 fluctuate greatly below the troposphere. In addition, the STD values of S6-ERA5 and S6-Radiosonde specific humidity data both show the decreasing characteristics in sequence from low to high latitudes.

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将哨兵-6 与ERA5 和无线电探测仪得出的温度、气压和湿度进行比较

将哨兵-6（S6）产品的温度、压力和比湿数据与 2022 年 ECMWF Reanalysis v5（ERA5）和无线电探测数据进行了比较。S6-ERA5 和 S6-Radiosonde 的温度、压力和湿度的总体 STD 分别为 0.74 ℃、0.45 hPa、0.3 g/kg，1.33 ℃、0.51 hPa、0.34 g/kg。研究发现，这三个大气参数在 S6 和 ERA5 之间的一致性要好于 S6 和辐射计之间的一致性。在时间特征方面，S6-ERA5 的比湿 STD 在夏季、秋季、春季和冬季依次降低。在空间特征方面，S6 对对流层温度值的检索能力更强，但 S6 与 ERA5 在 41.7 km 处的温度最大负偏差值为-1.57 ℃。S6 和 ERA5 的气压偏差值在对流层以下波动较大。此外，S6-ERA5 和 S6-Radiosonde比湿数据的 STD 值都呈现出从低纬度到高纬度依次递减的特点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.