Publications by authors named "Alexander M Omelko"
Article Synopsis
- Forests are facing higher risks of tree death due to drought, which can alter species composition and impact the global carbon cycle, particularly with deciduous oaks replacing conifers in the Northern Hemisphere.
- This study aimed to assess the legacy effects of extreme drought on oak growth from 1940 to 2016, examining variations across 21 species and multiple regions, revealing that negative effects can last from 1 to 5 years after drought, especially in dry areas.
- Results showed that repeated droughts significantly influenced oak growth, with species like Q. faginea exhibiting strong negative responses, while some oaks in wetter regions experienced growth increases post-drought, suggesting diverse resilience based on climate factors.
Poleward migration of the destructive effects of tropical cyclones during the 20th century.
Proc Natl Acad Sci U S A
November 2018
Determination of long-term tropical cyclone (TC) variability is of enormous importance to society; however, changes in TC activity are poorly understood owing to discrepancies among various datasets and limited span of instrumental records. While the increasing intensity and frequency of TCs have been previously documented on a long-term scale using various proxy records, determination of their poleward migration has been based mostly on short-term instrumental data. Here we present a unique tree-ring-based approach for determination of long-term variability in TC activity via forest disturbance rates in northeast Asia (33-45°N).
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