| Title: |
Carbon Dioxide Distribution, Origins, and Transport Along a Frontal Boundary During Summer in Mid-Latitudes |
| Authors: |
Samaddar, Arkayan; Feng, Sha; Lauvaux, Thomas; Barkley, Zachary R.; Pal, Sandip; Davis, Kenneth J. |
| Contributors: |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); National Aeronautics and Space Administration, NASA: 80NSSC19K0730 Earth Sciences Division: NNX15AG76G; Primary funding for this research was provided by NASA's Earth Sciences Division as part of the ACT‐America Earth Venture Suborbital mission (grant NNX15AG76G to Penn State). ACT‐America aircraft datasets for this research are available at Oak Ridge National Laboratory DAAC (Davis , 2018 ). Co‐author S. Pal was partly supported by the NASA Grant 80NSSC19K0730. We thank M. P. Butler at the Pennsylvania State University for generating the codes that incorporate the global modeled CO mole fractions into the regional model with the conservation of mass (Lauvaux, 2020 ). 2; ANR-17-MPGA-0008,CIUDAD,Quantification of urban greenhouse gas emissions(2017) |
| Source: |
ISSN: 2169-897X ; EISSN: 2169-8996. |
| Publisher Information: |
CCSD; American Geophysical Union |
| Publication Year: |
2021 |
| Collection: |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
| Subject Terms: |
mechanisms of CO2 transport2; high resolution simulation of CO; frontal transport of CO2; [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere |
| Description: |
International audience ; 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. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1029/2020JD033118 |
| Availability: |
https://hal.science/hal-03230875; https://hal.science/hal-03230875v1/document; https://hal.science/hal-03230875v1/file/2020JD033118.pdf; https://doi.org/10.1029/2020JD033118 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.8F18A112 |
| Database: |
BASE |