000206732 001__ 206732
000206732 005__ 20180913063039.0
000206732 037__ $$aPOST_TALK
000206732 245__ $$aRecord-setting forest stress in the Rocky Mountains caused by low snowfall and high potential evapotranspiration, consistent with expected future conditions
000206732 269__ $$a2014
000206732 260__ $$c2014
000206732 336__ $$aTalks
000206732 520__ $$aProjections of future climate for the Southwestern U.S. and other semi-arid regions globally include reductions in mountain snow accumulation and increased summer potential evapotranspiration. These changes may significantly alter runoff production, evapotranspiration, and gross primary productivity in mountain forests. Analysis of remotely sensed vegetation greenness data indicate strong forest and understory growth dependencies associated with snow accumulation and snowmelt with peak snow water equivalent explaining 40-50% of inter-annual variability in forest greenness in the Sierra Nevada and Rocky Mountains. Examples of these dependencies will be presented based on the 2012 drought in the Southwestern US whereby near record low snow accumulation and record high potential evapotranspiration have resulted in record low forest greening as evident in the 30+ year satellite record. Forest response to aridity in 2012 was exacerbated by forest disturbance with greenness anomalies 90% greater in magnitude in Bark Beetle and Spruce Budworm affected areas versus undisturbed areas and 182% greater in magnitude in areas impacted by fire. Given potential future changes in the hydroclimatology of mountainous regions, the results of these measurements may identify tipping points regarding ecosystem responses to water availability across gradients in physiography.
000206732 700__ $$aMolotch, Noah P.
000206732 700__ $$0246076$$aTrujillo Gomez, Ernesto$$g220577
000206732 7112_ $$aEGU General Assembly Conference$$cVienna, Austria$$d27 April - 2 May, 2014
000206732 8564_ $$uhttp://meetingorganizer.copernicus.org/EGU2014/EGU2014-14016.pdf$$zURL
000206732 909C0 $$0252326$$pCRYOS$$xU12533
000206732 909CO $$ooai:infoscience.tind.io:206732$$ppresentation$$pENAC
000206732 917Z8 $$x220577
000206732 937__ $$aEPFL-TALK-206732
000206732 973__ $$aEPFL
000206732 980__ $$aTALK