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Decadal-scale variability and warming affect spring timing and forest growth across the western Great Lakes region.
McPartland, Mara Y.
Afiliação
  • McPartland MY; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Potsdam, Germany. mara.mcpartland@awi.de.
Int J Biometeorol ; 68(4): 701-717, 2024 Apr.
Article em En | MEDLINE | ID: mdl-38236422
ABSTRACT
The Great Lakes region of North America has warmed by 1-2 °C on average since pre-industrial times, with the most pronounced changes observable during winter and spring. Interannual variability in temperatures remains high, however, due to the influence of ocean-atmosphere circulation patterns that modulate the warming trend across years. Variations in spring temperatures determine growing season length and plant phenology, with implications for whole ecosystem function. Studying how both internal climate variability and the "secular" warming trend interact to produce trends in temperature is necessary to estimate potential ecological responses to future warming scenarios. This study examines how external anthropogenic forcing and decadal-scale variability influence spring temperatures across the western Great Lakes region and estimates the sensitivity of regional forests to temperature using long-term growth records from tree-rings and satellite data. Using a modeling approach designed to test for regime shifts in dynamic time series, this work shows that mid-continent spring climatology was strongly influenced by the 1976/1977 phase change in North Pacific atmospheric circulation, and that regional forests show a strengthening response to spring temperatures during the last half-century.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Florestas / Ecossistema País/Região como assunto: America do norte Idioma: En Revista: Int J Biometeorol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Alemanha

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Florestas / Ecossistema País/Região como assunto: America do norte Idioma: En Revista: Int J Biometeorol Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Alemanha