Turbulent Reconnection Rates from Cluster Observations in the Magnetosheath

Details Turbulent Reconnection Rates from Cluster Observations in the Magnetosheath Turbulent Reconnection Rates from Cluster Observations in the Magnetosheath

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm51a2056w&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM51A-2056

Physics

Plasma Physics

[2728] Magnetospheric Physics / Magnetosheath, [7835] Space Plasma Physics / Magnetic Reconnection, [7863] Space Plasma Physics / Turbulence

Scientific paper

The role of turbulence in producing fast reconnection rates is an important unresolved question. Scant in situ analyses exist. We apply multiple spacecraft techniques to a case of nonlinear turbulent reconnection in the magnetosheath to test various theoretical results for turbulent reconnection rates. To date, in situ estimates of the contribution of turbulence to reconnection rates have been calculated from an effective electric field derived through linear wave theory. However, estimates of reconnection rates based on fully nonlinear turbulence theories and simulations exist that are amenable to multiple spacecraft analyses. Here we present the linear and nonlinear theories and apply some of the nonlinear rates to Cluster observations of reconnecting, turbulent current sheets in the magnetosheath. We compare the results to the net reconnection rate found from the inflow speed. Ultimately, we intend to test and compare linear and nonlinear estimates of the turbulent contribution to reconnection rates and to measure the relative contributions of turbulence and the Hall effect.

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