Solar global irradiance from actinometric degree data for Filaret Observatory (Bucharest), 1892–1903

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-07-03 DOI:10.1016/j.jastp.2024.106282

Viorel Badescu , Nicolae Rotar , Alexandru Dumitrescu , Giorgiana Lüftner , Cristian Oprea , Marius Paulescu

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引用次数: 0

Abstract

Long-term series of solar irradiation measured at ground level are not available in the old times. However, long-term series of actinometric degree data obtained by using the Arago-Davy instrument have been recorded in the second half of the 19th century in several locations of the world. We have developed recently a method to estimate global solar irradiance on horizontal surface from actinometric degree data (doi.org/10.1007/s00704-023-04485-2). This opens a way of finding proxy information about the incident solar irradiance on various areas of the globe before the 20th century. Hourly actinometric degree data for the years 1892–1903 are available at the Filaret Observatory (Bucharest, Romania, South-Eastern Europe). The observed series have a systematic decreasing tendency, which has been removed by using a correction procedure. The proposed method is used here to evaluate solar global irradiance at Filaret Observatory. Solar irradiance data provided by the Twentieth Century Reanalysis Project version 3 (20CRv3) are used as a reference. The expected hourly and daily average solar irradiance values show reasonable qualitative consistency with the 20CRv3 data. This consistency is notably stronger during the warmer months from April to September. Much better agreement is found for the monthly averaged solar global irradiance values. At this level, the proposed method and the procedure of the 20CRv3 project seem to validate each other.

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根据 Filaret 天文台（布加勒斯特）1892-1903 年的光度数据得出的太阳全球辐照度

古代没有在地面测量的长期太阳辐照度序列。不过，在 19 世纪下半叶，世界上有几个地方记录了利用阿拉戈-达维仪器获得的长期系列的动量度数据。我们最近开发了一种方法，可以根据阳射度数据估算全球水平表面的太阳辐照度（doi.org/10.1007/s00704-023-04485-2）。这为寻找 20 世纪以前全球不同地区入射太阳辐照度的替代信息开辟了一条途径。Filaret 天文台（罗马尼亚布加勒斯特，东南欧）提供了 1892-1903 年的每小时太阳辐射度数据。观测到的数据序列有一个系统的递减趋势，通过校正程序消除了这一趋势。本文采用建议的方法来评估 Filaret 天文台的全球太阳辐照度。太阳辐照度数据以二十世纪再分析项目第三版（20CRv3）为参考。预计的每小时和每日平均太阳辐照度值与 20CRv3 数据显示出合理的定性一致性。这种一致性在 4 月至 9 月的较暖月份明显更强。全球太阳辐照度月平均值的一致性要好得多。在这个层面上，建议的方法和 20CRv3 项目的程序似乎可以相互验证。

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

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.