气候变化领域集成服务门户(CCPortal): Atlantic-Pacific Gradients Drive Last Millennium Hydroclimate Variability in Mesoamerica

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DOI	10.1029/2020GL088061
	Atlantic-Pacific Gradients Drive Last Millennium Hydroclimate Variability in Mesoamerica
	Bhattacharya T.; Coats S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	The paleoclimatic record from Mexico and Central America, or Mesoamerica, documents dramatic swings in hydroclimate over the past few millennia. However, the dynamics underlying these past changes remain obscure. We use proxy indicators of hydroclimate to show that last millennium hydroclimate variability was dominated by opposite-signed moisture anomalies in northern and southern Mesoamerica. This pattern results from changes in moisture convergence driven by Atlantic-Pacific interbasin temperature gradients. While this pattern is reproduced by several models and multiple experiments with a single model, models appear to disagree about the underlying dynamics of this interbasin gradient. Moreover, disagreement about the interbasin gradient, and associated hydroclimate pattern, dominates spread in 21st century regional hydroclimate projections. These results emphasize the role of interbasin asymmetries in governing past and future regional climate change. They also demonstrate that paleoclimate studies can elucidate mechanisms directly relevant to projecting future hydroclimate in climate change hot spots like Mesoamerica. © 2020. The Authors.
英文关键词	Moisture; Central America; Last millenniums; Moisture convergence; Paleoclimate studies; Paleoclimatic record; Regional climate changes; Single models; Underlying dynamics; Climate change; climate change; climate modeling; climate variation; historical record; hydrometeorology; paleoclimate; proxy climate record; temperature gradient; twenty first century; Atlantic Ocean; Central America; Mesoamerica; Mexico [North America]; Pacific Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170172
作者单位	Department of Earth Sciences, Syracuse University, Syracuse, NY, United States; Department of Earth Sciences, University of Hawai'i at Manoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Bhattacharya T.,Coats S.. Atlantic-Pacific Gradients Drive Last Millennium Hydroclimate Variability in Mesoamerica[J],2020,47(13).
APA	Bhattacharya T.,&Coats S..(2020).Atlantic-Pacific Gradients Drive Last Millennium Hydroclimate Variability in Mesoamerica.Geophysical Research Letters,47(13).
MLA	Bhattacharya T.,et al."Atlantic-Pacific Gradients Drive Last Millennium Hydroclimate Variability in Mesoamerica".Geophysical Research Letters 47.13(2020).