Geomagnetic field and climate variability. 1. Spatial-temporal distribution of geomagnetic field and climatic parameters during XX century

Bakhmutov, V.; Martazinova, V. F.; Kilifarska, N.; Melnyk, G. V.; Ivanova, E. K.

doi:10.24028/gzh.0203-3100.v36i1.2014.116153

Cited by 4 publications

(7 citation statements)

References 70 publications

(66 reference statements)

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“…Some studies also evaluate the changes in the main magnetic field of the Earth whose sources lie in the core and at the core-mantle boundary at the timescale of the first hundreds-dozens of years. One such paper (Campuzano et al, 2018) used an example of analyzing changes in the area of the South Atlantic magnetic anomaly and in the global sea level in the last three hundred years after the long-term trend was discarded, and confirmed a hypothesis on which we had based our previous research Kilifarska et al, , 2016Kilifarska et al, 2020), namely that the geomagnetic field can have an effect on climatic changes but not the other way round.…”

Section: Introductionmentioning

confidence: 56%

“…By our hypothesis of ozone's impact on climate (Kilifarska, 2012; the amount of water on the level of upper troposphere-lower stratosphere is largely controlled by the interaction of the moist adiabatic lapse rate, temperature and humidity. An increase in the О 3 and consequently air temperature near tropopause leads to increasing moist adiabatic lapse rate and through this to more stable air mass.…”

Section: Resultsmentioning

confidence: 89%

“…Correlations between the geomagnetic field, ozone and surface temperature. Currently there are several hypotheses attempting to explain the revealed correlations between the geomagnetic field and climate (e.g., Bochniček et al, 2012;Veretenenko, Ogurtsov, 2012). Almost all of them center around the high-energy charged particles (mostly protons and electrons) which constantly or sporadically permeate the Earth's atmosphere.…”

Section: Resultsmentioning

confidence: 99%

“…Data are smoothed by 5-point filter. Plots have been created by ERA-20CM data (https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era-20cm-model-integrations) V. Bakhmutov et al: Interpretation of space-time temperature variations in Antarctica not only ozone destruction but also its production in the lower stratosphere through two pathways: (I) ionic-molecular autocatalytic cycle of ozone production initiated by GCR, for the Northern Hemisphere (Kilifarska, 2012, 2013); (II) ozone "selfrestoration" effect initiated by high-energy solar particles which dominates in the Southern Hemisphere (Kilifarska et al, 2013). These different mechanisms of the effect on the atmospheric ozone are closely related to the depth of the cosmic rays' and solar protons' penetration into the atmosphere.…”

Section: Resultsmentioning

confidence: 99%

“…ERA-20CM is a unification of 10 at mo spher ic models for 1899-2010. Of course, ERA-20 CM cannot aspire to the same precision, especially in the first half of the XX th century, yet according to (Hersbach et al, 2015), the data can be used to statistically evaluate climatic parameters, so we tried to incorporate them as an accessible information source.…”

Section: Methodsmentioning

confidence: 99%

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Interpretation of space-time temperature variations in Antarctica in connection with changes in the geomagnetic field and low stratospheric ozone

Bakhmutov

Kilifarska

Melnyk

et al. 2020

UAJ

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In this work we review space-time temperature variations in Antarctica and possible ways the various geophysical factors caused by fluctuations of the main geomagnetic field could influence it. We analyzed data of direct ground observations of temperature and the geomagnetic field, and data of ERA-20CM and ERA Interim on air temperature variation, ozone concentration and specific humidity at the upper troposphere-lower stratosphere level. The values of module of total intensity of the magnetic field vector were calculated according to the IGRF model. Time series of galactic cosmic rays (annual data since 1700) were provided by the World Data Center for Paleoclimatology. Solar proton fluxes with energies ≥10 MeV were taken from several sources: (1) historical reconstructions of large solar proton events before 1950, (2) published data on solar proton fluxes and (3) satellite data on solar proton events. Time series were analyzed using Statistica and Microsoft Excel software. The fastest decrease in geomagnetic field's intensity occurs in West Antarctica where there is also seen the largest increase in surface temperature in the region during the XX th century. Besides that, in Central and East Antarctica there are trends towards decreasing of air temperature and strengthening of geomagnetic field. The concomitance might indicate a link between the geomagnetic field and regional climatic change. We explain it thusly: (i) the geomagnetic field controls the charged particles flux entering the Earth's atmosphere; (ii) the charged particles influence the ozone concentration near tropopause and through this, the temperature and humidity in the upper troposphere-lower stratosphere, (iii) the induced changes in humidity near tropopause have an effect on surface temperature by strengthening or weakening the greenhouse effect. Changes in the geomagnetic field intensity can be one of the factors which shape the temporal and regional variability of surface temperature. Low intensity of the geomagnetic field and the highest speed of its changes in the West Antarctica correspond to the systematically low ozone concentration and increased air humidity near tropopause. The factors cause retention of Earth's longwave radiation in the troposphere due to the greenhouse effect which results in regional warming in the region.

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Section: Introductionmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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