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Using 137,562 quasars in the redshift range $2.1\leq z\leq3.5$ from the DataRelease 11 (DR11) of the Baryon Oscillation Spectroscopic Survey (BOSS) ofSloan Digital Sky Survey (SDSS)-III, the BOSS-SDSS collaboration estimated theexpansion rate $H(z=2.34)=222\pm7$ km/s/Mpc of Universe, and reported that thisvalue is in tension with the predictions of flat $\Lambda$CDM model at around2.5$\sigma$ level. In this paper, we briefly describe some attempts made in theliterature to relieve the tension, and show that the tension can naturally bealleviated in non-flat $\Lambda$CDM model with positive curvature. We alsoperform the observational consistency check by considering the constraints onthe non-flat $\Lambda$CDM model from Planck,WP and BAO data. We find that thenon-flat $\Lambda$CDM model constrained with Planck+WP data fits better to theline of sight measurement $H(z=2.34)=222\pm7$ km/s/Mpc, but only at the expenseof still having a poor fit to the BAO transverse measurements.

Consistency of the nonflat $\Lambda$CDM model with the new result from BOSS