Simulating multiyear drought events in North America with the HadCM3 climate model

Busby, Simon J.

doi:10.1002/wea.310

Cited by 4 publications

(1 citation statement)

References 20 publications

(34 reference statements)

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“…The scPDSI has a similar range of variability in diverse climates, allowing for more exact comparisons between locations and times [38,44]. The scPDSI has been widely used for drought characterization [44][45][46]. …”

Section: The Most Severe Drought On Recordmentioning

confidence: 99%

Monitoring Changes in Water Use Efficiency to Understand Drought Induced Tree Mortality

Malone

2017

Forests

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Forests are becoming increasingly vulnerable to rising tree mortality rates in response to warming and drought. In California, the most severe drought on record occurred from 2012 to 2016 and high tree mortality rates were observed in response to this prolonged drought. Differences in satellite-derived estimates of water-use efficiency (WUE) under normal (i.e., WUE BASELINE ) and drought conditions (∆WUE = WUE 2014 − WUE BASELINE ) captured variation in drought resilience, and is used here to understand patterns in tree mortality. Across California forests, a low WUE BASELINE under normal conditions was indicative of a low drought resilience and was associated with increasing tree mortality rates. Forested areas with high drought frequency in recent years (2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015) and lower WUE BASELINE were the most vulnerable to high post-drought tree mortality. Post drought tree mortality peaked in 2015 and tree mortality was detected in areas where bark beetles were active. Our results show that spatial and temporal changes in WUE can signal shifts in ecosystem resilience and that water-limited forests are sensitive to temperature-and precipitation-driven drought stress. Considering that forests with low resilience will be poised for dieback in the future if climates continue to feature rising temperatures without compensating increases in precipitation, it is becoming increasingly important that we understand drought vulnerability at the ecosystem level and how it changes over time with climate conditions.

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Section: The Most Severe Drought On Recordmentioning

confidence: 99%