Prof. Nili Harnik's Home page
Large-scale atmospheric dynamics group
Publications
In preparation (to be submitted soon):
T. Tamarin-Brodsky and N. Harnik: The three-way feedback between North-Atlantic circulation regimes, Rossby wave breaking, and surface weather. In preparation
Suresan S., N. Harnik, and R. Caballero: Extreme weather anomalies associated with merged Atlantic-African jet during winter. In preparation.
Hartig, K., N. Harnik and E. Tziperman, 2024: Evidence for upward but not downward influence between the wintertime troposphere and stratosphere.
Submitted/under revision:
Mak J., N. Harnik, E. Heifetz, G. Kumar, and E.Q. Y. Ong, 2024: Edge-wave phase-shifts versus normal-mode phase-tilts in an Eady problem. Submitted to Phys. Rev. Fluids.
Sandler D., H. Saaroni, B. Ziv, T. Tamarin-Brodsky, and N. Harnik, 2024: The Connection Between North Atlantic Storm Track Regimes and Eastern Mediterranean Cyclonic Activity. Submitted to Weather Clim. Dynam.
Harnik, N. and V. Wirth, 2024: Quasi resonance in a leaky waveguide? Submitted to J. Atmos. Sci
White, I. P., O. Lachmy, and N. Harnik, 2024: Influence of diabatic heating on the maintenance of the midlatitude jet. In revision for Q J R Meteorol Soc.
Published/accepted:
Thakur, ABS, J. Sukhatme, and N. Harnik. 2024: Investigating the role of tropical and extra-tropical waves in the Hadley circulation via present-day Earth-like to globally uniform SST forcing. In press, Q J R Meteorol Soc.
Wolfgang Wicker, Nili Harnik, Maria Pyrina, Daniela I. V. Domeisen, 2024: Heatwave location changes in relation to Rossby wave phase speed. In press, Geophys. Res. Let.
T. Tamarin-Brodsky and N. Harnik, 2024: The relation between Rossby Wave Breaking events and low-level weather systems, Weather Clim. Dynam. 5, 87–108.
Sandler, D., Saaroni, H., Ziv, B., Hochman, A., Harnik, N., & Rostkier-Edelstein, D. (2024). A multiscale approach to statistical downscaling of daily precipitation: Israel as a test case. International Journal of Climatology, 44, 59–71.
Franzke C. and N. Harnik, 2023: Long-Term Trends of the Atmospheric Circulation and Moist Static Energy Budget in the JRA-55 Reanalysis. J. Climate, 36, 2959–2984.
Weinberger, I., Garfinkel, C. I., Harnik, N., & Paldor, N., 2022: Transmission and Reflection of Upward-Propagating Rossby Waves in the Lowermost Stratosphere: Importance of the Tropopause Inversion Layer. J. Atmos. Sci., 79, 3263–3274,
Schröttle, J., Suhas, D., Harnik, N. and Sukhatme, J. (2022), Turbulence and equatorial waves in moist and dry shallow-water flow, excited through mesoscale stochastic forcing. Q J R Meteorol Soc. 148, 599–619.
Suhas, D.L., Sukhatme, J. & Harnik, N.(2021) Dry and moist atmospheric circulation with uniform sea-surface temperature. Q J R Meteorol Soc, 1– 22.
Silverman V, S. W. Lubis, N. Harnik, and K. Matthes, 2021: A synoptic view of the early winter mid-latitude QBO signal. J. Atmos Sci. 78, 3759-3780
Messori, G., Harnik, N., Madonna, E., Lachmy, O., and Faranda, D., 2021: A dynamical systems characterization of atmospheric jet regimes, Earth Syst. Dynam., 12, 233–251
Sandler D. and N. Harnik, 2020: Future Meridional Wind Trends Through the Lens of Subseasonal Teleconnections. Weather Clim. Dynam. 1, 427-443.
Lachmy, O, and Harnik, N. 2020: Tropospheric jet variability in different flow regimes. Quart. J. Roy. Meteor. Soc., 146, 327– 347.
Baldwin, Mark P., T. Birner, G. Brasseur, J. Burrows, N. Butchart, R. Garcia, M. Geller, L. Gray, K. Hamilton, N. Harnik, M. I. Hegglin, U. Langematz, A. Robock, K. Sato, and A. A. Scaife, 2019: 100 Years of Progress in Understanding the Stratosphere and Mesosphere, Meteor. Monogr., 59, 27.1-27.62.
Cohen, Y., Durden, S. L., Harnik, N., & Heifetz, E.: 2019. Relating Observations of Gradient Nonbalance at the Top of Hurricanes With Their Warm Core Structures. Geophys. Res. Lett., 46, 11510– 11519. Selected for Editor’s Highlight
Silverman, V., Harnik, N., Matthes, K., Lubis, S. W., and Wahl, S. 2018: Radiative effects of ozone waves on the Northern Hemisphere polar vortex and its modulation by the QBO, Atmos. Chem. Phys., 18, 6637–6659.
Lubis, S.W, Matthes, K., Harnik, N., Omrani, N.-E., and Wahl, S., 2018: Downward Wave Coupling between the Stratosphere and Troposphere under Future Anthropogenic Climate Change. J.Clim, 31, 4135-4155.
Messori, G., Caballero, R., Bouchet, F., Faranda, D., Grotjahn, R., Harnik, N., Jewson, S., Pinto, J.G., Rivière, G., Jewson, S., Woollings, T., Yiou, P. 2018: An interdisciplinary approach to the study of extreme weather events: large-scale atmospheric controls and insights from dynamical systems theory and statistical mechanics. Bull. Amer. Meteorol. Soc., 99, ES81-ES85.
Ferreira, D., P. Cessi, H. Coxall, A. de Boer, H. A. Dijkstra, S. S. Drijfhout, T. Eldevik, N. Harnik, J. F. McManus, D. P. Marshall, J. Nilsson, F. Roquet, T. Schneider, R. C. Wills, 2018: Atlantic-Pacific asymmetry in deep water formation. Ann. Rev. of Earth and Plan. Sci., 46, 327-352.
Cohen, Y., N. Harnik, E. Heifetz, D. S. Nolan, D Tao, and F Zhang, 2017: On the Violation of Gradient Wind Balance at the top of Tropical Cyclones, Geophys. Res. Lett. 44, 8017–8026.
Lubis, S. W., Silverman, V., Matthes, K., Harnik, N., Omrani, N.-E., and Wahl, S., 2017: How does downward planetary wave coupling affect polar stratospheric ozone in the Arctic winter stratosphere? Atmos. Chem. Phys., 17, 2437-2458.
Garfinkel, C.I. and N. Harnik, 2017: The Non-Gaussianity and Spatial Asymmetry of Temperature Extremes Relative to the Storm Track: The Role of Horizontal Advection. J. Climate, 30, 445–464
Harnik, N., G. Messori, R. Caballero, and S. B. Feldstein (2016), The Circumglobal North American wave pattern and its relation to cold events in eastern North America, Geophys. Res. Lett., 43, 11,015–11,023, doi:10.1002/2016GL070760
Lachmy O. and N. Harnik, 2016: Wave and jet maintenance in different flow regimes. J. Atmos. Sci., 73 2465-2484.
Lubis, S. W., K. Matthes, N-E Omrani, N. Harnik and S Wahl, 2016: Influence of the Quasi-Biennial Oscillation and Sea Surface Temperature Variability on Downward Wave Coupling in the Northern Hemisphere. J. Atmos. Sci, 73, 1943-1965
Harnik N., Chaim Garfinkel, and O. Lachmy, 2016: ‘The Influence of Jet Regimes on Extreme Weather events’. In, Dynamics and Predictability of Large-Scale, High-Impact Weather and Climate Events 2, 79. Ed. Li, J., R. Swinbank, H. Volkert and R. Grotjahn. Cambridge University Press
Garfinkel C. I., V. Silverman, N. Harnik, C. Haspel, and Y. Riz, 2015: Stratospheric Response to Intraseasonal Changes in Incoming Solar Radiation, JGR, 120, 7648-7660, doi: 10.1002/2015JD023244.
Adam O., Schneider T. and Harnik, N. 2014. Role of changes in mean temperatures vs. temperature gradients in the recent widening of the Hadley circulation. J. Clim. 27, 7450–7461
Harnik, N., E. Galanti, O. Martius, and O. Adam, 2014. The anomalous merging of the African and North Atlantic jet streams during Northern Hemisphere winter of 2010. J. Clim. 27, 7319–7334.
Harnik N., 2014: Extreme upper level cyclonic vorticity events in relation to the Southern Hemisphere jet stream. Geoph. Reas. Let.41, 4373-4380.
Lachmy O. and N. Harnik, 2014: The Transition to a Subtropical Jet Regime and its Maintenance. J. Atmos. Sci., 71, 1389-1409
Harnik, N., D. G. Dritschel, and E. Heifetz, 2014: On jet sharpening and the equilibration of asymmetric barotropic instability. Q.J.R. Meteorol. Soc., 140: 2444 2464.
Adam, O. and N. Harnik, 2013: Idealized annually averaged Macroturbulent Hadley Circulation in a Shallow Water Model. J. Atmos. Sci., 70, 284-302.
H. Vitoshkin, E. Heifetz, A. Yu. Gelfgat and N. Harnik, 2012: On the role of vortex stretching in energy optimal growth of three dimensional perturbations on plane parallel shear flows. J. Fluid Mech, 2012;707:369-380. doi:10.1017/jfm.2012.285
Shaw, T. A., J. Perlwitz, N. Harnik, P. A. Newman, and S. Pawson, 2011: The impact of stratospheric ozone changes on downward wave coupling in the Southern Hemisphere. J. Clim., 24, 4210-4229
Harnik, N., J. Perlwitz and T. A. Shaw, 2011: Observed decadal changes in downward wave coupling between the stratosphere and troposphere in the Southern Hemisphere. J. Clim., 24, 4558-4569.
Rabinovich A., O. M. Umurhan, N. Harnik, F. Lott, E. Heifetz, 2011: Vorticity inversion and action-at-a-distance instability in stably stratified shear flow. Under revision J. Fluid Mech. 670, 301-325
Shaw, T. A., J. Perlwitz and N. Harnik, 2010: Downward wave coupling between the statosphere and troposphere: The importance of meridional wave guiding and comparison with zonal-mean coupling. J. Climate, 23, 6365-6381.
Harnik N, R. Seager, N. Naik, M. Cane, and M. Ting, 2010. The role of linear wave refraction in the transient eddy-mean flow response to tropical Pacific SST anomalies. Quart. J. Roy. Meteor. Soc., 136: 2132–2146. doi: 10.1002/qj.688
Seager R., N. Naik, M. Ting, M. A. Cane, N. Harnik and Y. Kushnir, 2010: Adjustment of the atmospheric circulation to tropical Pacific SST anomalies: Variability of transient eddy propagation in the Pacific-North America sector. Quart. J. Roy. Meteor. Soc. 136, 277-296.
Ziv B., H. Saaroni, M. Romem, E. Heifetz, N. Harnik and A. Baharad, 2009: Analysis of Conveyor Belts in Winter Mediterranean Cyclones. Theor. App. Clim, DOI 10.1007/s00704-009-0150-9.
Heifetz E., N. Harnik, T. Tamarin, 2009 Canonical Hamiltonian representation of pseudoenergy in shear flows using counter-propagating Rossbywaves Quart. J. Roy. Meteor. Soc. 135, 2161-2167.
Orli Lachmy, Nili Harnik, 2009: A Wave Amplitude Transition in a Quasi-Linear Model with Radiative Forcing and Surface Drag J. Atmos. Sci.66, 3479-3490.
Harnik, N., 2009: Observed stratospheric downward reflection and its relation to upward pulses of wave activity. J. Geophys. Res. 114, D08120, doi:10.1029/2008JD010493.
Harnik N. and E. Heifetz, O.M. Umuhan, and F. Lott, 2008. A buoyancy-vorticity wave interaction approach to stratified shear flow. JAS, 652615-2630.
Harnik N. and E. Heifetz, 2007. Relating Over--Reflection and Wave Geometry to the Counter Propagating Rossby Wave Perspective: Toward a Deeper Mechanistic Understanding of Shear Instability. J. Atmos. Sci.64 2238-61.
Seager, R., M. F. Ting, I. Held, Y. Kushnir, J. Lu, G. Vecchi, H. P. Huang, N. Harnik, A. Leetmaa, N. C. Lau, C. H. Li, J. Velez and N. Naik, 2007: Model projections of an imminent transition to a more arid climate in southwestern North America. Science, 316(5828): 1181-1184.
Seager, R., N. Harnik, Y. Kushnir, M. Ting, H.-P. Huang, and J. Velez, 2005. Mechanisms of ENSO-forcing of hemispherically symmetric precipitation variability. Quart. J. Roy. Meteor. Soc. 131 1501-1528
Harnik N., R, K. Scott, and J. Perlwitz, 2005: Wave reflection and focusing prior to the major stratospheric warming of September 2002. JAS 62, 640-650.
Perlwitz, J., and N. Harnik, 2004. Downward coupling between the stratosphere and troposphere: The relative roles of wave and zonal mean processes. J. Clim. 17, 4902-4909
Harnik, N., and E. K. M. Chang, 2004: The effects of variations in jet width on the growth of baroclinic waves: Implications for midwinter Pacific stormtrack variability. JAS 61, 23-40
Perlwitz, J., and N. Harnik, 2003: Observational Evidence of a Stratospheric Influence on the Troposphere by Planetary Wave Reflection. J. Clim 16 3011-3026.
Seager, R., N. Harnik, Y. Kushnir, W. Robinson, and J. Miller, 2003: Mechanisms of hemispherically symmetric climate variability. J. Clim 16,2960-2978.
Harnik, N. and E. K. M. Chang, 2003. Storm track variations as seen in radiosonde observations and reanalysis data. J.Climate 16, 480-495.
Harnik, N., 2002: The evolution of a stratospheric wave packet. JAS 59, 202-217.
Harnik, N., and R. S. Lindzen, 2001: The effect of reflecting surfaces on the vertical structure and variability of stratospheric planetary waves. JAS 58, 2872-2894.
Harnik, N., and R. S. Lindzen, 1998: The effect of basic-state potential vorticity gradients on the growth of baroclinic waves and the height of the tropopause, JAS 55, 344-360.
Unpublished:
Harnik, N., and R. S. Lindzen, Are TOVS temperature retrievals capable of resolving the vertical structure of stratospheric planetary waves?