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We have examined methanol emission from Orion KL with of the {\emHerschel}/HIFI instrument, and detected two methanol bands centered at 524 GHzand 1061 GHz. The 524 GHz methanol band (observed in HIFI band 1a) is dominatedby the isolated $\Delta$J$=$0, K$=-4\rightarrow$-3, v$_t$$=$0 Q branch, andincludes 25 E-type and 2 A-type transitions. The 1061 GHz methanol band(observed in HIFI band 4b) is dominated by the $\Delta$J$=$0,K$=7\rightarrow$6, v$_t$$=$0 Q branch transitions which are mostly blended. Wehave used the isolated E-type v$_t$$=$0 methanol transitions to explore thephysical conditions in the molecular gas. With HIFI's high velocity resolution,the methanol emission contributed by different spatial components along theline of sight toward Orion KL (hot core, low velocity flow, and compact ridge)can be distinguished and studied separately. The isolated transitions detectedin these bands cover a broad energy range (upper state energy ranging from 80 Kto 900 K), which provides a unique probe of the thermal structure in eachspatial component. The observations further show that the compact ridge isexternally heated. These observations demonstrate the power of methanol linesas probes of the physical conditions in warm regions in close proximity toyoung stars.

Herschel observations of Extra-Ordinary Sources: Methanol as a probe of physical conditions in Orion KL