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Near-IR atomic and molecular transitions are powerful tools to trace the warmand hot gas in the circumstellar environment of young stars. Ro-vibrationaltransitions of H2 and H2O, and overtone transitions of CO at 2 micron centeredat the stellar velocity trace hot (T~1500 K) gas in the inner few AU ofprotoplanetary disks. H2 near-IR lines displaying a blueshift of a few km/sprobe molecular disk winds. H2 lines presenting blueshifts of hundreds of km/sreveal hot shocked gas in jets. Atomic lines such as the HeI line at 10830 Aand the Hydrogen Paschen beta and Brakett gamma lines trace emission fromaccretion funnel flows and atomic disk winds. Bright forbidden atomic lines inthe near-IR of species such as [Fe II], [N I], [S I], [S II], and [C I] traceatomic and ionized material in jets. The new near-IR high resolutionspectrograph SPIROU planned for the Canada France Hawaii Telescope will offerthe unique capability of combining high-spectral resolution (R~75000) with alarge wavelength coverage (0.98 to 2.35 micron) in one single exposure. Thiswill provide us with the means of probing accretion funnel flows, winds, jets,and hot gas in the inner disk simultaneously. This opens the exitingpossibility of investigating their combined behavior in time by the means ofmonitoring observations and systematic surveys. SPIROU will be a powerful toolto progress our understanding of the connexion between the accretion/ejectionprocess, disk evolution, and planet formation.

Perspectives for the study of gas in protoplanetary disks and  accretion/ejection phenomena in young stars with the near-IR spectrograph  SPIROU at the CFHT