Hydrological Cycle Laboratory. Ocean sources, cyclone activity and moisture transport. HCLab. Natalia Tilinina. IORAS (Moscow, Russia)

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1 P.P. Shirshov Institute of Oceanology, RAS Hydrological Cycle Laboratory Ocean sources, cyclone activity and moisture transport Natalia Tilinina IORAS (Moscow, Russia) Megagrant 14.B of the Ministry of Education and Science of the Russian Federation

2 Mid-latitudinal hydrological cycle: processes Large-scale variability of mid-latitudinal jet Mid-latitudinal jet Low-level baroclinicity and cyclone intensification Cyclones Extratropical cyclones and atmospheric heat and moisture transports Diabatic heating and evaporation Evaporation Continental precipitation and its extremes Precipitation

3 Moisture anomalies and cyclones Zolina et al., 2015

4 Cyclones in different reanalyses, Differences provided mostly by shallow cyclones (<980 hpa) Winter weakening of cyclone activity over the Arctic At the same tome shift of the storm track to the North in winter Tilinina et al. (2013)

5 Cyclones in Arctic System Reanalysis (non-hydrostatic model) Cyclone climatologies 40 deepest cyclones during Tilinina et al. (2014)

6 Air-sea interaction and cyclones What type of cyclones responsible for the evaporation from ocean to atmosphere higher than average? Moisture uptake from the ocean does not depend on cyclone depth, deepening rate of size, it depends on cyclone surrounding (is there an anticyclone in the rear part of cyclone?) Tilinina et al. (2015)

7 Atmospheric conditions for extreme evaporation, North Atlantic: Composites of SLP centered at evaporation events of different intensities % of cyclone associated with excessive evaporation events Cyclone anticyclone interaction zone a trigger the for extreme evaporation Tilinina et al. (2015)

8 WRF NCEP WRF NCEP Atmospheric moisture (mm) MOISTURE TRANSPORT IN THE ATMOSPHERE Cyclone tracks for compositing Precipitation mm/h По материалам диссертации Гаврикова А.В.

9 Reynolds decomposition mean flow transient eddies Cyclones transport moisture form south to north, while mean flow from west to east Cyclones are the only source of moisture in the Arctic Moisture transport through 70N: mean flow solid bars transient eddies semi-transparent bars Zolina et al., 2015

10 The role of cyclones in the transport of moisture to continents Synoptic chart EUMETSAT cloud cover, IR images While cyclones are contributing for the moisture transports, moisture itself comes from remote regions

11 The role of cyclones in the transport of moisture to continents Synoptic chart EUMETSAT cloud cover, IR images While cyclones are contributing for the moisture transports, moisture itself comes from remote regions

12 Publications Селиванова Ю. В., Тилинина Н. Д., Гулев С.К., Добролюбов С. А., (2015). Влияние ледового покрова в Арктике на турбулентные потоки тепла между океаном и атмосферой, Океанология, т. 60, 6, 2015, [в печати]. Тилинина Н.Д., Гавриков А.В., Гулев С.К., (2015). Формирование экстремально высоких турбулентных потоков тепла из океана в атмосферу в Северной Атлантике, Океанология, т. 60, 6, 2015, [в печати]. Semmler, T., Jung. T., Tilinina, N., Campos, C., Gulev, S., Koracin, D., (2015), Impact of reduced Arctic sea ice on the Northern Hemisphere atmosphere in an ensemble of coupled model simulations, Journal of Climate, [submitted]. Tilinina, N., Gulev, S. K., Bromwich D.H., (2014), New view of Arctic cyclone activity from Arctic System Reanalysis. Geophysical Research Letters, 41, doi: /2013gl Josey, S. A., L. Yu, S. Gulev, X. Jin, N. Tilinina, B. Barnier, and L. Brodeau (2014), Unexpected impacts of the Tropical Pacific array on reanalysis surface meteorology and heat fluxes, Geophys. Res. Lett., 41, , doi: /2014gl Dufour, A., Zolina, O., Gulev, S., (2015), Atmospheric moisture transports to the Arctic from different reanalyses: comparative assessment and analysis of source terms, Journal of Climate, [submitted].

13 Conclusions Cyclones themselves are not providing conditions for significant evaporation events, only 40-60% associated with positive moisture transport to the atmosphere Cyclone anticyclone interaction zones provide strong cold-dry air outbreaks resulting in strong evaporation events Moisture transport from the ocean to continents mostly done not by cyclones, but by atmospheric flow that consist from vortexes interaction Cyclones responsible south to north moisture transport While cyclones are contributing for the moisture transports, moisture itself comes from remote regions

14 P.P. Shirshov Institute of Oceanology, RAS Hydrological Cycle Laboratory Megagrant 14.B of the Ministry of Education and Science of the Russian Federation