气候变化领域集成服务门户(CCPortal): Carbon Dioxide Distribution, Origins, and Transport Along a Frontal Boundary During Summer in Mid-Latitudes

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DOI	10.1029/2020JD033118
	Carbon Dioxide Distribution, Origins, and Transport Along a Frontal Boundary During Summer in Mid-Latitudes
	Samaddar A.; Feng S.; Lauvaux T.; Barkley Z.R.; Pal S.; Davis K.J.
发表日期	2021
ISSN	2169897X
卷号	126 期号:9
英文摘要	Synoptic weather systems are a major driver of spatial gradients in atmospheric CO2 mole fractions. During frontal passages, air masses from different regions meet at the frontal boundary creating significant gradients in CO2 mole fractions. We quantitatively describe the atmospheric transport of CO2 mole fractions during a mid-latitude cold front passage and explore the impact of various sources of CO2. We focus here on a cold front passage over Lincoln, Nebraska on August 4th, 2016 observed by aircraft during the Atmospheric Carbon and Transport-America campaign. A band of air with elevated CO2 was located along the frontal boundary. Observed and simulated differences in CO2 across the front were as high as 25 ppm. Numerical simulations using Weather Research and Forecasting Model with Chemistry at cloud resolving resolutions (3 km), coupled with CO2 surface fluxes and boundary conditions from CarbonTracker (CT-NRTv2017x), were performed to explore atmospheric transport at the front. Model results demonstrate that the frontal CO2 difference in the upper troposphere can be explained largely by inflow from outside of North America. This difference is modified in the atmospheric boundary layer and lower troposphere by continental surface fluxes, dominated in this case by biogenic and fossil fuel fluxes. Horizontal and vertical advection are found to be responsible for the transport of CO2 mole fractions along the frontal boundary. We show that cold front passages lead to large CO2 transport events including a significant contribution from vertical advection, and that midcontinent frontal boundaries are formed from a complex mixture of CO2 sources. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	frontal transport of CO2; high resolution simulation of CO; mechanisms of CO2 transport2
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185270
作者单位	Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; Now at Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Laboratoire des Sciences du Climat et de l'Environnement, CEA, CNRS, UVSQ/IPSL, Université Paris-Saclay, Orme des Merisiers, Gif-sur-Yvette Cedex, France; Department of Geosciences, Texas Tech University, Lubbock, TX, United States; Earth and Environmental Systems Institute, The Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Samaddar A.,Feng S.,Lauvaux T.,et al. Carbon Dioxide Distribution, Origins, and Transport Along a Frontal Boundary During Summer in Mid-Latitudes[J],2021,126(9).
APA	Samaddar A.,Feng S.,Lauvaux T.,Barkley Z.R.,Pal S.,&Davis K.J..(2021).Carbon Dioxide Distribution, Origins, and Transport Along a Frontal Boundary During Summer in Mid-Latitudes.Journal of Geophysical Research: Atmospheres,126(9).
MLA	Samaddar A.,et al."Carbon Dioxide Distribution, Origins, and Transport Along a Frontal Boundary During Summer in Mid-Latitudes".Journal of Geophysical Research: Atmospheres 126.9(2021).