Nili Harnik

New Affiliation:
Department of Geophysics and Planetary Sciences,
Tel Aviv University,
Tel Aviv , 69978, Israel

harnik@tau.ac.il
http://www.tau.ac.il/~harnik/ 

Also, adjunct researcher at:

Climate Modeling group

Lamont Doherty Earth Observatory, Columbia University

61 Route 9W

Palisades, NY, 10964

Tel: 845-365-8493

Fax: 845-365-8736

nili@ldeo.columbia.edu

Research interests:

• Storm track dynamics and variability: Observations of the interannual and decadal variations of the Northern Hemisphere storm tracks. The relationship between the interannual variations of the jet and storm track strength in the Pacific.

• Stratospheric dynamics: Planetary wave structure and variability. The effects of downward reflection on wave structure.

• TMME- Tropical Modulation of Midlatitude Eddies - the effect of ENSO on midlatitude circulation.

• Mid latitude eddy life cycle dynamics. The effects of basic state wave geometry on the life cycles (LC1 vs LC2), and possible consequences for larger scale circulation- strom track structure and variability, the response of midlatitudes to El Nino.

• The North Atlantic Oscillation - Arctic Oscillation: the interaction with the stratosphere

Publications:

Perlwitz, J., and N. Harnik, 2003. Downward coupling between the stratosphere and troposphere: The

relative roles of wave and zonal mean processes. Submitted to J. Clim. Abstract pdf file

Harnik N., R, K. Scott, and J. Perlwitz, 2003:  Wave reflection and focusing prior
to the major stratospheric warming of September 2002. Submitted to JAS.   Abstract pdf file

Harnik, N., and E. K. M. Chang, 2003: The effects of variations in jet width on the
growth of baroclinic waves: Implications for midwinter Pacific stormtrack variability.
To appear in JAS .  Abstract pdf file

Perlwitz, J., and N. Harnik, 2003: Observational Evidence of a Stratospheric Influence
on the Troposphere by Planetary Wave Reflection.
J. Clim 16  3011-3026.  Abstract pdf file

Seager, R., N. Harnik, Y. Kushnir, W. Robinson, and J. Miller, 2003: Mechanisms of hemispherically
symmetric climate variability. J. Clim 16, 2960-2978.   pdf file

Harnik, N. and E. K. M. Chang, 2003. Storm track variations as seen in radiosonde observations
and reanalysis data. J.Climate 16, 480-495.  pdf file Abstract

Harnik, N., 2002: The evolution of a stratospheric wave packet. JAS 59, 202-217.   pdf file Abstract

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. pdf file Abstract

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.   pdf file Abstract

Harnik, N., and R. S. Lindzen, Are TOVS temperature retrievals
capable of resolving the vertical structure of stratospheric planetary
waves? To be submitted one day… Abstractps file

CV

Photos of Constantine