A decline of linear relation between outgoing longwave radiation and temperature during geomagnetic disturbances

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2025-03-24 DOI:10.1016/j.jastp.2025.106503

A.A. Karakhanyan, S.I. Molodykh

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引用次数: 0

Abstract

Climate modeling is the main instrument to predict future climate changes. Despite the recent advances in this field, there is still high uncertainty concerning the contribution of natural (including solar/geomagnetic activity) and anthropogenic factors to the current climate changes. Based on the observational data, we studied the linear relation between Outgoing Longwave Radiation (OLR) and Near-Surface Temperature (NST) under quiet and disturbed geomagnetic conditions 1979 through 2022. Water vapor (due to its optical properties) was established to be the main factor to cause a linear OLR-NST relation. The OLR-NST correlation in the optically thin atmosphere above 30° corresponds to quiet geomagnetic conditions and so does the anticorrelation between the above parameters in the optically thick low-latitude atmosphere. The winter ocean regions of the OLR-NST anticorrelation up to 60° in the both hemispheres under quiet geomagnetic conditions related to the clouds. We found the geomagnetic disturbances lead to decrease in the OLR response to the NST variations in the optically thin atmosphere within the mid- and high latitudes, particularly during spring. The considerable changes of linear OLR-NST relation are observed in the optically thick low-latitude atmosphere during geomagnetic disturbances.

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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.