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We clarify the quantitative nature of the cosmological evolution of a globalstring network, that is, the energy density, peculiar velocity, velocitysquared, Lorentz factor, formation rate of loops, and emission rate ofNambu-Goldstone bosons, based on a new type of numerical simulation of scalarfields in Eulerian meshes. We give a detailed explanation of a method toextract the above-mentioned quantities to characterize string evolution byanalyzing scalar fields in Eulerian meshes from a Lagrangian viewpoint. Weconfirm our previous claim that the number of long strings per horizon volumein a global string network is smaller than in the case of a local stringnetwork by a factor of $\sim$10 even under cosmological situations, and itsreason is clarified.Comment: 18 pages, 8 figure

Quantitative evolution of global strings from the Lagrangian viewpoint