气候变化领域集成服务门户(CCPortal): Role of the atmospheric moisture budget in defining the precipitation seasonality of the great lakes region

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DOI	10.1175/JCLI-D-19-0952.1
	Role of the atmospheric moisture budget in defining the precipitation seasonality of the great lakes region
	Minallah S.; Steiner A.L.
发表日期	2021
ISSN	0894-8755
起始页码	643
结束页码	657
卷号	34 期号:2
英文摘要	Precipitation in the Great Lakes region has a distinct seasonal cycle that peaks in early summer, followed by a decline in August and a secondary peak in September. This seasonality is often not captured by models, which necessitates understanding of the driving mechanisms to ascertain the model biases. This study analyzes the atmospheric moisture budget using reanalysis datasets to assess the role of regional evapotranspiration and moisture influx from remote origins in defining the precipitation seasonality, and to understand how the Great Lakes modulate spatial patterns and magnitudes of these components. Specifically, the land-water thermal contrast yields large seasonal variations in the evaporative fluxes and creates distinctive localized spatial patterns of moisture flux divergence. We find considerable month-to-month variations in both evapotranspiration and the net moisture transport through the boundaries, where they play a cooperative (contrasting) role in amplifying (dampening) the moisture content available for precipitation and total precipitable water. Our seasonal analysis suggests that the misrepresentation of the budget quantities in models, for example, in simulation of moisture transport processes and parameterization schemes, can result in an anomalous precipitation behavior and, in some cases, violation of the atmospheric moisture mass balance, resulting in large residual magnitudes. We also identify conspicuous differences in the representation of moisture budget components in the various reanalyses, which can alter their representation of the regional hydroclimates. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric movements; Evapotranspiration; Lakes; Moisture; Atmospheric moisture; Great Lakes regions; Moisture transport; Parameterization schemes; Precipitation behavior; Regional evapotranspiration; Seasonal variation; Total precipitable water; Budget control; data set; evaporation; evapotranspiration; mass transport; moisture content; precipitation assessment; seasonal variation
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170965
作者单位	Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Minallah S.,Steiner A.L.. Role of the atmospheric moisture budget in defining the precipitation seasonality of the great lakes region[J],2021,34(2).
APA	Minallah S.,&Steiner A.L..(2021).Role of the atmospheric moisture budget in defining the precipitation seasonality of the great lakes region.Journal of Climate,34(2).
MLA	Minallah S.,et al."Role of the atmospheric moisture budget in defining the precipitation seasonality of the great lakes region".Journal of Climate 34.2(2021).