Response in surface air temperature fields of Europe to the Indian ocean dipole

A.B. Polonsky, A.V. Torbinsky, A.V. Gubarev

 Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

E-mail: apolonsky5@mail.ru

DOI: 10.33075/2220-5861-2022-4-6-14

UDC 551.513.7                                                 

Abstract:

   The aim of this work is to study the influence of the Indian Ocean Dipole (IOD) events, which are independent of El Niño-Southern Oscillation (ENSO) on spatiotemporal variability of surface air temperature (SAT) in the European region.

   ERA5 atmospheric reanalysis data on monthly mean air surface temperature values, as well as IOD and ENSO indices for the period 1959–2020, were used. For years during which there were no significant pacific events, years were identified in which the value of the IOD index exceeded 0.4σ. For the samples corresponding to the positive and negative phases of IOD, the SAT anomaly fields averaged and the composite were constructed.

   A statistically significant signal was identified in the field of surface air temperature over the European region in the summer-autumn period, associated with IOD. It has been found that during the development of the positive phase of intense IOD events, extensive positive temperature anomalies over Europe reach + (3–4) ℃. On the contrary, in the negative phase of IOD, an increase in the absolute value of negative SAT anomalies (up to -(4–5) ℃) is observed over the most part of the European region. The exception is the northern part of Europe, where anomalies of the opposite (in relation to the rest of the region) sign were noted during both phases of the IOD. The influence of IOD on the climatic variability of the region under study, most likely, comes down to the excitation of atmospheric disturbances over the Indian Ocean during the period of the mature phase of the oscillation, and their subsequent spread to the Atlantic-European region.

Keywords: Indian Ocean dipole, El Niño-Southern Oscillation, surface air temperature, European region.

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REFERENCES

  1. Saji N.H., Goswami B.N., Vinayachandran P.N., and Yamagata T. A dipole mode in the tropical Indian Ocean. Nature, 1999, Vol.401 (6751), pp. 360–363.
  2. Vinayachandran P.N., Lizuka S., and Yamagata T. Indian Ocean dipole mode events in an ocean general circulation model. Deep Sea Res, 2002, Part II, 49 (7), pp. 1573–1596.
  3. Conway D., Allison E.H., Felstead R., and Goulden M. Rainfall variability in East Africa: implications for natural resources management and livelihoods. Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences, 2005, 363 (1826), pp. 49–54.
  4. Page S.E., Siegert F., Rieley J., Boehm H.V., Jaya A., and Limin S. The amount of carbon released from peat and forest fires in Indonesia during 1997. Nature, 2002, 420 (6911), pp. 61–65.
  5. Ummenhofer C.C., England M.H., McIntosh P.C., Meyers G.M., Pook M.J., Risbey J.S., Gupta A.S., and Taschetto A.S. What causes southeast Australia’s worst droughts? Geophysical Research Letters, 2009, Vol. 36 (4).
  6. Wang G., Cai W. Two-year consecutive concurrences of positive Indian Ocean Dipole and Central Pacific El Niño preconditioned the 2019/2020 Australian “black summer” bushfires. Geoscience Letters, 2020, Vol. 7 (1), pp. 1–9.
  7. Schär C., Jendritzky G. Hot news from summer 2003. Nature, 2004,  432, pp. 559–560.
  8. Stott P. A., Stone D. A., Allen M. R. Human contribution to the European heatwave of 2003. Nature, 2004. Vol. 432, pp. 610–614.
  9. Black E., Blackburn M., Harrison G. Factors contributing to the summer 2003 European heatwave. Weather, 2004, Vol. 59 (8), pp. 217–223.
  10. Ferranti L., Viterbo. P. The European summer of 2003: Sensitivity to soil water initial conditions. Journal of Climate, 2006, Vol. 19 (15), pp. 3659–3680.
  11. Luterbacher J., Dietrich D. European seasonal and annual temperature variability, trends, and extremes since 1500. Science, 2004, Vol. 303 (5663), pp.1499–1503.
  12. Struzewska J., Kaminski J. V. Formation and transport of photooxidants over Europe during the July 2006 heat wave – Observations and GEM-AQ model simulations. Atmospheric Chemistry and Physics, 2008, Vol. 8 (3), pp. 721–736.
  13. Benítez A.S., Goessling H., Pithan F. The July 2019 European Heat Wave in a Warmer Climate: Storyline Scenarios with a Coupled Model Using Spectral Nudging. Journal of Climate, 2022, Vol. 35 (8), pp. 1–51.
  14. Osman M., Zaitchik B., Badr H. North Atlantic centers of action and seasonal to subseasonal temperature variability in Europe and eastern North America. Journal of Climatology, 2021, Vol. 41 (1), pp.1775–1790.
  15. Lubkov A.S., Voskresenskaya E.N., Marchukova O.V. Sovremennaya klassifikaciya El’-Nino i sopostavlenie sootvetstvuyushchih klimaticheskih otklikov v Atlantiko-Evrazijskom regione (Recent El-Nino classification and associated climate response comparisons for the Atlantic-Eurasian region). Sistemy kontrolja okruzhayshej sredy, 2017, No. 1(27), pp. 94–100.
  16. Polonskiy А.B., Torbinskiy А.V., Basharin D.V. Vlijanie Severo-Аtlanticheskogo kolebaniya, El-Nino — Yuzhnogo kolebaniya i Indookeanskogo dipolya na prostranstvenno-vremennuyu izmenchivost prizemnoy temperaturi vozduha i atmosfernogo davleniya Sredizemnomorsko-Chernomorskogo regiona (The influence of North Atlantic oscillation, El-Nino/Southern oscillation and Indian dipole on spatial-temporal variability of the surface air temperature and pressure over Mediterranean-Black Sea region). Vestnik Odesskogo gosudarstvennogo ekologicheskogo universiteta, 2008, No. 6, pp.181–197.
  17. Polonskiy А.B. Otklik v poljah prizemnoy temperaturi vozduha, davlenija i osadkov Yevraziyskogo regiona na anomalii temperaturi poverhnosti okeana, svyazannie s Indookeanskim dipole (Response of the Eurasian surface temperature, pressure and precipitation on the Indo-ocean dipole). Sistemy kontrolja okruzhayshej sredy, 2018, No. 1(31), pp. 83–89.
  18. Polonskiy А.B., Torbinskiy А.V. Otsenka vliyanija Indookeanskogo dipolja na letnie stoki r. Dunay (Evaluation of the influence of the Indian ocean dipole on the run off of the river Danub). Sistemy kontrolja okruzhayshej sredy, 2018, No. 4(34), pp. 89–93.
  19. https://psl.noaa.gov/gcos_wgsp/Timeseries/Data/dmi.had.long.data (August 05, 2022).
  20. https://psl.noaa.gov/gcos_wgsp/Timeseries/Data/nino34.long.anom.data (August 05, 2022).
  21. Rao S.A., Behera M., Masumoto Y., Yamagata T. Subsurface interannual variability associated with the Indian Ocean Dipole. Clivar Exchanges, 2002, No. 7(1), pp. 12–17.
  22. Polonsky A.B, Torbinsky A.V. The IOD–ENSO Interaction: The Role of the Indian Ocean Current’s System // Atmosphere. 2021. Vol. 12, No. 12. P.1662
  23. Bulić I. H., Kucharski F. Delayed ENSO Impact on Spring Precipitation over North/Atlantic European Region. Climate Dynamics, 2012, No. 7(11–12), pp. 2593–2612.

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