reference : Identifying anomalously early spring onsets in the CESM large ensemble project

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Bibliographic fields
reftype Journal Article
Abstract Seasonal transitions from winter to spring impact a wide variety of ecological and physical systems. While the effects of early springs across North America are widely documented, changes in their frequency and likelihood under the combined influences of climate change and natural variability are poorly understood. Extremely early springs, such as March 2012, can lead to severe economical losses and agricultural damage when these are followed by hard freeze events. Here we use the new Community Earth System Model Large Ensemble project and Extended Spring Indices to simulate historical and future spring onsets across the United States and in the particular the Great Lakes region. We found a marked increase in the frequency of March 2012-like springs by midcentury in addition to an overall trend towards earlier spring onsets, which nearly doubles that of observational records. However, changes in the date of last freeze do not occur at the same rate, therefore, causing a potential increase in the threat of plant tissue damage. Although large-scale climate modes, such as the Pacific Decadal Oscillation, have previously dominated decadal to multidecadal spring onset trends, our results indicate a decreased role in natural climate variability and hence a greater forced response by the end of the century for modulating trends. Without a major reduction in greenhouse gas emissions, our study suggests that years like 2012 in the US could become normal by mid-century.
Author Labe, Zachary; Ault, Toby; Zurita-Milla, Raul
DOI 10.1007/s00382-016-3313-2
Date June 01
ISSN 1432-0894
Issue 11
Journal Climate Dynamics
Pages 3949-3966
Title Identifying anomalously early spring onsets in the CESM large ensemble project
Type of Article journal article
Volume 48
Year 2017
Bibliographic identifiers
_record_number 23401
_uuid 4d4ae7e2-bd4f-429c-a696-e60e0156d95f